./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya --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 ba97c44431e27256d062ccf668a9dc4f57d7e92b05fdac6228d08e7c5a2d8a0c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:41:22,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:41:22,289 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 03:41:22,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:41:22,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:41:22,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:41:22,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:41:22,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:41:22,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:41:22,323 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:41:22,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:41:22,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:41:22,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:41:22,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:41:22,326 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:41:22,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:41:22,327 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:41:22,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:41:22,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:41:22,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:41:22,329 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 03:41:22,330 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 03:41:22,330 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 03:41:22,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:41:22,331 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:41:22,332 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:41:22,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:41:22,332 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:41:22,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:41:22,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:41:22,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:41:22,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:41:22,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:41:22,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:41:22,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:41:22,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:41:22,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:41:22,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:41:22,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:41:22,336 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:41:22,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:41:22,336 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba97c44431e27256d062ccf668a9dc4f57d7e92b05fdac6228d08e7c5a2d8a0c [2023-11-29 03:41:22,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:41:22,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:41:22,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:41:22,597 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:41:22,597 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:41:22,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/25_stack_longer-1.i [2023-11-29 03:41:25,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:41:25,564 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:41:25,564 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/sv-benchmarks/c/pthread-ext/25_stack_longer-1.i [2023-11-29 03:41:25,579 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/data/45f4e339a/b926cf1f183845fd8e280f3a245d35f1/FLAG537344826 [2023-11-29 03:41:25,593 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/data/45f4e339a/b926cf1f183845fd8e280f3a245d35f1 [2023-11-29 03:41:25,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:41:25,597 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:41:25,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:41:25,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:41:25,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:41:25,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:41:25" (1/1) ... [2023-11-29 03:41:25,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262c5e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:25, skipping insertion in model container [2023-11-29 03:41:25,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:41:25" (1/1) ... [2023-11-29 03:41:25,653 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:41:25,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:41:25,957 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:41:26,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:41:26,039 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:41:26,040 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:41:26,048 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:41:26,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26 WrapperNode [2023-11-29 03:41:26,048 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:41:26,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:41:26,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:41:26,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:41:26,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,070 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,095 INFO L138 Inliner]: procedures = 179, calls = 37, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 179 [2023-11-29 03:41:26,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:41:26,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:41:26,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:41:26,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:41:26,104 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,109 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,127 INFO L175 MemorySlicer]: Split 19 memory accesses to 3 slices as follows [2, 16, 1]. 84 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2, 0]. The 8 writes are split as follows [0, 7, 1]. [2023-11-29 03:41:26,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,141 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:41:26,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:41:26,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:41:26,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:41:26,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (1/1) ... [2023-11-29 03:41:26,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:41:26,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:26,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:41:26,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c28f62b-e6a6-4cb4-98c8-f8a69a4aab9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:41:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:41:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:41:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:41:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 03:41:26,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 03:41:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:41:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:41:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:41:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:41:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:41:26,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:41:26,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:41:26,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:41:26,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:41:26,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:41:26,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:41:26,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:41:26,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:41:26,232 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:41:26,364 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:41:26,366 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:41:26,718 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:41:26,998 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:41:26,998 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 03:41:26,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:41:26 BoogieIcfgContainer [2023-11-29 03:41:26,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:41:27,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:41:27,001 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:41:27,005 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:41:27,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:41:25" (1/3) ... [2023-11-29 03:41:27,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305bd2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:41:27, skipping insertion in model container [2023-11-29 03:41:27,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:26" (2/3) ... [2023-11-29 03:41:27,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305bd2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:41:27, skipping insertion in model container [2023-11-29 03:41:27,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:41:26" (3/3) ... [2023-11-29 03:41:27,007 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-1.i [2023-11-29 03:41:27,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:41:27,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-29 03:41:27,028 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:41:27,107 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 03:41:27,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 70 transitions, 144 flow [2023-11-29 03:41:27,178 INFO L124 PetriNetUnfolderBase]: 4/77 cut-off events. [2023-11-29 03:41:27,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:41:27,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 4/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 201 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-29 03:41:27,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 70 transitions, 144 flow [2023-11-29 03:41:27,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 70 transitions, 144 flow [2023-11-29 03:41:27,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:41:27,201 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@75b23f53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:41:27,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2023-11-29 03:41:27,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:41:27,205 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 03:41:27,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:41:27,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:27,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:41:27,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2023-11-29 03:41:27,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash 666786, now seen corresponding path program 1 times [2023-11-29 03:41:27,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:27,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867088068] [2023-11-29 03:41:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:27,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867088068] [2023-11-29 03:41:27,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867088068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:27,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:27,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:41:27,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298805818] [2023-11-29 03:41:27,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:27,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:27,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 70 [2023-11-29 03:41:27,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:27,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:27,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 70 [2023-11-29 03:41:27,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:27,673 INFO L124 PetriNetUnfolderBase]: 108/285 cut-off events. [2023-11-29 03:41:27,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:41:27,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 285 events. 108/285 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1056 event pairs, 96 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 507. Up to 235 conditions per place. [2023-11-29 03:41:27,679 INFO L140 encePairwiseOnDemand]: 52/70 looper letters, 37 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-29 03:41:27,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 182 flow [2023-11-29 03:41:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-29 03:41:27,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-29 03:41:27,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-29 03:41:27,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-29 03:41:27,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:27,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-29 03:41:27,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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) [2023-11-29 03:41:27,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:27,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:27,707 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 144 flow. Second operand 3 states and 97 transitions. [2023-11-29 03:41:27,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 182 flow [2023-11-29 03:41:27,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 03:41:27,714 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 108 flow [2023-11-29 03:41:27,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-29 03:41:27,721 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2023-11-29 03:41:27,721 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 108 flow [2023-11-29 03:41:27,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:27,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:27,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:41:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:41:27,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2023-11-29 03:41:27,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 666787, now seen corresponding path program 1 times [2023-11-29 03:41:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:27,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102162442] [2023-11-29 03:41:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102162442] [2023-11-29 03:41:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102162442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:27,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:41:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290159160] [2023-11-29 03:41:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:27,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:27,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 70 [2023-11-29 03:41:27,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:27,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:27,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 70 [2023-11-29 03:41:27,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:27,954 INFO L124 PetriNetUnfolderBase]: 73/208 cut-off events. [2023-11-29 03:41:27,955 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 03:41:27,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 208 events. 73/208 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 701 event pairs, 64 based on Foata normal form. 34/193 useless extension candidates. Maximal degree in co-relation 376. Up to 168 conditions per place. [2023-11-29 03:41:27,958 INFO L140 encePairwiseOnDemand]: 68/70 looper letters, 36 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-29 03:41:27,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 180 flow [2023-11-29 03:41:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-29 03:41:27,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2023-11-29 03:41:27,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-29 03:41:27,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-29 03:41:27,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:27,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-29 03:41:27,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-29 03:41:27,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:27,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:27,964 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 108 flow. Second operand 3 states and 83 transitions. [2023-11-29 03:41:27,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 180 flow [2023-11-29 03:41:27,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:41:27,967 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 107 flow [2023-11-29 03:41:27,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-29 03:41:27,968 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2023-11-29 03:41:27,968 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 107 flow [2023-11-29 03:41:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:27,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:27,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 03:41:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:41:27,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2023-11-29 03:41:27,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1609918595, now seen corresponding path program 1 times [2023-11-29 03:41:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783058648] [2023-11-29 03:41:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:27,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:28,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:28,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783058648] [2023-11-29 03:41:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783058648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:28,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:28,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:41:28,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052471180] [2023-11-29 03:41:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:28,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:41:28,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:41:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:41:28,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 70 [2023-11-29 03:41:28,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-29 03:41:28,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:28,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 70 [2023-11-29 03:41:28,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:28,230 INFO L124 PetriNetUnfolderBase]: 102/265 cut-off events. [2023-11-29 03:41:28,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:41:28,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 265 events. 102/265 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 946 event pairs, 90 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 486. Up to 221 conditions per place. [2023-11-29 03:41:28,234 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 35 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-29 03:41:28,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 175 flow [2023-11-29 03:41:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-29 03:41:28,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2023-11-29 03:41:28,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-29 03:41:28,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-29 03:41:28,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:28,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-29 03:41:28,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-29 03:41:28,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:28,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:28,239 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 107 flow. Second operand 3 states and 83 transitions. [2023-11-29 03:41:28,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 175 flow [2023-11-29 03:41:28,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:41:28,242 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 104 flow [2023-11-29 03:41:28,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-29 03:41:28,242 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -17 predicate places. [2023-11-29 03:41:28,243 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 104 flow [2023-11-29 03:41:28,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-29 03:41:28,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:28,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 03:41:28,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:41:28,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2023-11-29 03:41:28,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1609918594, now seen corresponding path program 1 times [2023-11-29 03:41:28,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:28,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244537519] [2023-11-29 03:41:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:28,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:28,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244537519] [2023-11-29 03:41:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244537519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:28,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:41:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336165542] [2023-11-29 03:41:28,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:28,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:41:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:41:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:41:28,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2023-11-29 03:41:28,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2023-11-29 03:41:28,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:28,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2023-11-29 03:41:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:28,471 INFO L124 PetriNetUnfolderBase]: 65/184 cut-off events. [2023-11-29 03:41:28,471 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 03:41:28,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 184 events. 65/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 568 event pairs, 56 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 332. Up to 148 conditions per place. [2023-11-29 03:41:28,473 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 32 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 03:41:28,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 166 flow [2023-11-29 03:41:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-29 03:41:28,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2023-11-29 03:41:28,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-29 03:41:28,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-29 03:41:28,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:28,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-29 03:41:28,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-29 03:41:28,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:28,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-29 03:41:28,478 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 104 flow. Second operand 3 states and 83 transitions. [2023-11-29 03:41:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 166 flow [2023-11-29 03:41:28,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:41:28,480 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 101 flow [2023-11-29 03:41:28,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-29 03:41:28,481 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -18 predicate places. [2023-11-29 03:41:28,481 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 101 flow [2023-11-29 03:41:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2023-11-29 03:41:28,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:28,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 03:41:28,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:41:28,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2023-11-29 03:41:28,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash -945207730, now seen corresponding path program 1 times [2023-11-29 03:41:28,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:28,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191507632] [2023-11-29 03:41:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:28,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 03:41:28,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 03:41:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 03:41:28,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 03:41:28,521 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 03:41:28,522 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (65 of 66 remaining) [2023-11-29 03:41:28,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 66 remaining) [2023-11-29 03:41:28,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 66 remaining) [2023-11-29 03:41:28,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 66 remaining) [2023-11-29 03:41:28,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 66 remaining) [2023-11-29 03:41:28,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 66 remaining) [2023-11-29 03:41:28,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 66 remaining) [2023-11-29 03:41:28,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 66 remaining) [2023-11-29 03:41:28,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 66 remaining) [2023-11-29 03:41:28,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 66 remaining) [2023-11-29 03:41:28,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 66 remaining) [2023-11-29 03:41:28,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 66 remaining) [2023-11-29 03:41:28,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 66 remaining) [2023-11-29 03:41:28,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 66 remaining) [2023-11-29 03:41:28,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 66 remaining) [2023-11-29 03:41:28,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 66 remaining) [2023-11-29 03:41:28,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 66 remaining) [2023-11-29 03:41:28,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 66 remaining) [2023-11-29 03:41:28,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 66 remaining) [2023-11-29 03:41:28,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 66 remaining) [2023-11-29 03:41:28,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 66 remaining) [2023-11-29 03:41:28,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (44 of 66 remaining) [2023-11-29 03:41:28,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 66 remaining) [2023-11-29 03:41:28,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 66 remaining) [2023-11-29 03:41:28,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 66 remaining) [2023-11-29 03:41:28,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 66 remaining) [2023-11-29 03:41:28,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (39 of 66 remaining) [2023-11-29 03:41:28,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (38 of 66 remaining) [2023-11-29 03:41:28,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 66 remaining) [2023-11-29 03:41:28,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 66 remaining) [2023-11-29 03:41:28,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 66 remaining) [2023-11-29 03:41:28,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 66 remaining) [2023-11-29 03:41:28,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 66 remaining) [2023-11-29 03:41:28,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 66 remaining) [2023-11-29 03:41:28,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (31 of 66 remaining) [2023-11-29 03:41:28,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 66 remaining) [2023-11-29 03:41:28,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 66 remaining) [2023-11-29 03:41:28,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 66 remaining) [2023-11-29 03:41:28,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 66 remaining) [2023-11-29 03:41:28,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 66 remaining) [2023-11-29 03:41:28,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 66 remaining) [2023-11-29 03:41:28,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 66 remaining) [2023-11-29 03:41:28,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 66 remaining) [2023-11-29 03:41:28,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 66 remaining) [2023-11-29 03:41:28,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 66 remaining) [2023-11-29 03:41:28,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 66 remaining) [2023-11-29 03:41:28,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 66 remaining) [2023-11-29 03:41:28,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 66 remaining) [2023-11-29 03:41:28,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 66 remaining) [2023-11-29 03:41:28,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 66 remaining) [2023-11-29 03:41:28,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 66 remaining) [2023-11-29 03:41:28,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 66 remaining) [2023-11-29 03:41:28,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 66 remaining) [2023-11-29 03:41:28,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 66 remaining) [2023-11-29 03:41:28,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 66 remaining) [2023-11-29 03:41:28,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 66 remaining) [2023-11-29 03:41:28,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 66 remaining) [2023-11-29 03:41:28,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 66 remaining) [2023-11-29 03:41:28,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 66 remaining) [2023-11-29 03:41:28,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 66 remaining) [2023-11-29 03:41:28,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (5 of 66 remaining) [2023-11-29 03:41:28,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (4 of 66 remaining) [2023-11-29 03:41:28,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 66 remaining) [2023-11-29 03:41:28,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 66 remaining) [2023-11-29 03:41:28,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 66 remaining) [2023-11-29 03:41:28,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 66 remaining) [2023-11-29 03:41:28,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 03:41:28,538 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 03:41:28,541 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 03:41:28,541 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 03:41:28,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 03:41:28,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 130 transitions, 270 flow [2023-11-29 03:41:28,632 INFO L124 PetriNetUnfolderBase]: 8/145 cut-off events. [2023-11-29 03:41:28,633 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 03:41:28,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 145 events. 8/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 547 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-29 03:41:28,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 130 transitions, 270 flow [2023-11-29 03:41:28,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 130 transitions, 270 flow [2023-11-29 03:41:28,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:41:28,640 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@75b23f53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:41:28,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 97 error locations. [2023-11-29 03:41:28,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:41:28,642 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 03:41:28,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:41:28,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:28,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:41:28,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2023-11-29 03:41:28,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:28,643 INFO L85 PathProgramCache]: Analyzing trace with hash 795876, now seen corresponding path program 1 times [2023-11-29 03:41:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:28,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663563864] [2023-11-29 03:41:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:28,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663563864] [2023-11-29 03:41:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663563864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:41:28,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017778554] [2023-11-29 03:41:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:28,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 130 [2023-11-29 03:41:28,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:28,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:28,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 130 [2023-11-29 03:41:28,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:30,273 INFO L124 PetriNetUnfolderBase]: 8108/13926 cut-off events. [2023-11-29 03:41:30,273 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-11-29 03:41:30,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26278 conditions, 13926 events. 8108/13926 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 101838 event pairs, 7488 based on Foata normal form. 0/9818 useless extension candidates. Maximal degree in co-relation 19387. Up to 12247 conditions per place. [2023-11-29 03:41:30,397 INFO L140 encePairwiseOnDemand]: 97/130 looper letters, 71 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-11-29 03:41:30,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 96 transitions, 346 flow [2023-11-29 03:41:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2023-11-29 03:41:30,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45897435897435895 [2023-11-29 03:41:30,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2023-11-29 03:41:30,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2023-11-29 03:41:30,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:30,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2023-11-29 03:41:30,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2023-11-29 03:41:30,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:30,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:30,404 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 270 flow. Second operand 3 states and 179 transitions. [2023-11-29 03:41:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 96 transitions, 346 flow [2023-11-29 03:41:30,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 346 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 03:41:30,408 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 204 flow [2023-11-29 03:41:30,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2023-11-29 03:41:30,409 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, -30 predicate places. [2023-11-29 03:41:30,409 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 204 flow [2023-11-29 03:41:30,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:30,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:30,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:41:30,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 03:41:30,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2023-11-29 03:41:30,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash 795877, now seen corresponding path program 1 times [2023-11-29 03:41:30,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:30,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869358727] [2023-11-29 03:41:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:30,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:30,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869358727] [2023-11-29 03:41:30,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869358727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:30,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:30,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:41:30,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407065385] [2023-11-29 03:41:30,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:30,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:30,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:30,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 130 [2023-11-29 03:41:30,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-29 03:41:30,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:30,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 130 [2023-11-29 03:41:30,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:31,678 INFO L124 PetriNetUnfolderBase]: 5809/10173 cut-off events. [2023-11-29 03:41:31,678 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-29 03:41:31,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19193 conditions, 10173 events. 5809/10173 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 72495 event pairs, 5344 based on Foata normal form. 1123/8206 useless extension candidates. Maximal degree in co-relation 19185. Up to 8913 conditions per place. [2023-11-29 03:41:31,758 INFO L140 encePairwiseOnDemand]: 128/130 looper letters, 70 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2023-11-29 03:41:31,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 344 flow [2023-11-29 03:41:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-29 03:41:31,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-29 03:41:31,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-29 03:41:31,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-29 03:41:31,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:31,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-29 03:41:31,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:31,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:31,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:31,764 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 204 flow. Second operand 3 states and 150 transitions. [2023-11-29 03:41:31,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 344 flow [2023-11-29 03:41:31,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 95 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:41:31,767 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 203 flow [2023-11-29 03:41:31,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2023-11-29 03:41:31,768 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, -30 predicate places. [2023-11-29 03:41:31,768 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 203 flow [2023-11-29 03:41:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-29 03:41:31,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 03:41:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 03:41:31,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2023-11-29 03:41:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2058978024, now seen corresponding path program 1 times [2023-11-29 03:41:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23655100] [2023-11-29 03:41:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:31,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:31,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23655100] [2023-11-29 03:41:31,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23655100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:31,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:31,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:41:31,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282696464] [2023-11-29 03:41:31,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:31,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:41:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:31,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:41:31,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:41:31,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 130 [2023-11-29 03:41:31,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:31,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:31,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 130 [2023-11-29 03:41:31,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:33,080 INFO L124 PetriNetUnfolderBase]: 7172/12300 cut-off events. [2023-11-29 03:41:33,080 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-29 03:41:33,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23225 conditions, 12300 events. 7172/12300 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 87310 event pairs, 6600 based on Foata normal form. 0/8946 useless extension candidates. Maximal degree in co-relation 23216. Up to 10823 conditions per place. [2023-11-29 03:41:33,126 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 67 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-11-29 03:41:33,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 331 flow [2023-11-29 03:41:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-29 03:41:33,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-29 03:41:33,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-29 03:41:33,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-29 03:41:33,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:33,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-29 03:41:33,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:33,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:33,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:33,131 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 203 flow. Second operand 3 states and 150 transitions. [2023-11-29 03:41:33,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 331 flow [2023-11-29 03:41:33,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:41:33,134 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 196 flow [2023-11-29 03:41:33,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-29 03:41:33,135 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, -33 predicate places. [2023-11-29 03:41:33,135 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 196 flow [2023-11-29 03:41:33,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:41:33,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:33,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 03:41:33,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 03:41:33,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2023-11-29 03:41:33,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:33,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2058978023, now seen corresponding path program 1 times [2023-11-29 03:41:33,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:33,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94493770] [2023-11-29 03:41:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:33,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:33,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:33,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94493770] [2023-11-29 03:41:33,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94493770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:33,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:33,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:41:33,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247768330] [2023-11-29 03:41:33,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:33,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:41:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:41:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:41:33,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 130 [2023-11-29 03:41:33,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-11-29 03:41:33,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:33,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 130 [2023-11-29 03:41:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:41:33,921 INFO L124 PetriNetUnfolderBase]: 4509/7909 cut-off events. [2023-11-29 03:41:33,921 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-29 03:41:33,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14911 conditions, 7909 events. 4509/7909 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 52985 event pairs, 4116 based on Foata normal form. 0/5907 useless extension candidates. Maximal degree in co-relation 14901. Up to 6905 conditions per place. [2023-11-29 03:41:33,958 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 62 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2023-11-29 03:41:33,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 87 transitions, 314 flow [2023-11-29 03:41:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:41:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-29 03:41:33,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37948717948717947 [2023-11-29 03:41:33,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-29 03:41:33,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-29 03:41:33,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:41:33,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-29 03:41:33,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2023-11-29 03:41:33,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:33,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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) [2023-11-29 03:41:33,962 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 196 flow. Second operand 3 states and 148 transitions. [2023-11-29 03:41:33,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 87 transitions, 314 flow [2023-11-29 03:41:33,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 87 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:41:33,965 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 189 flow [2023-11-29 03:41:33,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2023-11-29 03:41:33,966 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, -36 predicate places. [2023-11-29 03:41:33,966 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 189 flow [2023-11-29 03:41:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-11-29 03:41:33,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:33,967 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 03:41:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 03:41:33,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2023-11-29 03:41:33,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash 956791283, now seen corresponding path program 1 times [2023-11-29 03:41:33,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065613162] [2023-11-29 03:41:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 03:41:33,981 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 03:41:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 03:41:33,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 03:41:33,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 03:41:33,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (96 of 97 remaining) [2023-11-29 03:41:33,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 97 remaining) [2023-11-29 03:41:33,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 97 remaining) [2023-11-29 03:41:33,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 97 remaining) [2023-11-29 03:41:33,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (75 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 97 remaining) [2023-11-29 03:41:33,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (70 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (69 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 97 remaining) [2023-11-29 03:41:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (62 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 97 remaining) [2023-11-29 03:41:34,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 97 remaining) [2023-11-29 03:41:34,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 97 remaining) [2023-11-29 03:41:34,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 97 remaining) [2023-11-29 03:41:34,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 97 remaining) [2023-11-29 03:41:34,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 97 remaining) [2023-11-29 03:41:34,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 97 remaining) [2023-11-29 03:41:34,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 97 remaining) [2023-11-29 03:41:34,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 97 remaining) [2023-11-29 03:41:34,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 97 remaining) [2023-11-29 03:41:34,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 97 remaining) [2023-11-29 03:41:34,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 97 remaining) [2023-11-29 03:41:34,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 97 remaining) [2023-11-29 03:41:34,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 97 remaining) [2023-11-29 03:41:34,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (36 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (35 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 97 remaining) [2023-11-29 03:41:34,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 97 remaining) [2023-11-29 03:41:34,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 97 remaining) [2023-11-29 03:41:34,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 97 remaining) [2023-11-29 03:41:34,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (5 of 97 remaining) [2023-11-29 03:41:34,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (4 of 97 remaining) [2023-11-29 03:41:34,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 97 remaining) [2023-11-29 03:41:34,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 97 remaining) [2023-11-29 03:41:34,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 97 remaining) [2023-11-29 03:41:34,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 97 remaining) [2023-11-29 03:41:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 03:41:34,008 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 03:41:34,009 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 03:41:34,009 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 03:41:34,116 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 03:41:34,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 190 transitions, 398 flow [2023-11-29 03:41:34,151 INFO L124 PetriNetUnfolderBase]: 12/213 cut-off events. [2023-11-29 03:41:34,151 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 03:41:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 213 events. 12/213 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1008 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 185. Up to 4 conditions per place. [2023-11-29 03:41:34,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 190 transitions, 398 flow [2023-11-29 03:41:34,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 190 transitions, 398 flow [2023-11-29 03:41:34,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:41:34,159 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@75b23f53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:41:34,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2023-11-29 03:41:34,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:41:34,161 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 03:41:34,161 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:41:34,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:41:34,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:41:34,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2023-11-29 03:41:34,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 984546, now seen corresponding path program 1 times [2023-11-29 03:41:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:34,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228560719] [2023-11-29 03:41:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:41:34,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228560719] [2023-11-29 03:41:34,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228560719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:34,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:34,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:41:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773395961] [2023-11-29 03:41:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:34,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:34,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 190 [2023-11-29 03:41:34,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 190 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 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) [2023-11-29 03:41:34,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:41:34,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 190 [2023-11-29 03:41:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:26,831 INFO L124 PetriNetUnfolderBase]: 416480/608901 cut-off events. [2023-11-29 03:42:26,832 INFO L125 PetriNetUnfolderBase]: For 7705/7705 co-relation queries the response was YES. [2023-11-29 03:42:27,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165754 conditions, 608901 events. 416480/608901 cut-off events. For 7705/7705 co-relation queries the response was YES. Maximal size of possible extension queue 13539. Compared 5518943 event pairs, 390816 based on Foata normal form. 0/406356 useless extension candidates. Maximal degree in co-relation 599007. Up to 552391 conditions per place. [2023-11-29 03:42:30,077 INFO L140 encePairwiseOnDemand]: 142/190 looper letters, 105 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-11-29 03:42:30,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 141 transitions, 512 flow [2023-11-29 03:42:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:42:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:42:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-11-29 03:42:30,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789473684210524 [2023-11-29 03:42:30,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-11-29 03:42:30,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-11-29 03:42:30,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:30,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-11-29 03:42:30,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2023-11-29 03:42:30,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 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) [2023-11-29 03:42:30,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 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) [2023-11-29 03:42:30,081 INFO L175 Difference]: Start difference. First operand has 185 places, 190 transitions, 398 flow. Second operand 3 states and 261 transitions. [2023-11-29 03:42:30,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 141 transitions, 512 flow [2023-11-29 03:42:30,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 141 transitions, 510 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 03:42:30,092 INFO L231 Difference]: Finished difference. Result has 141 places, 141 transitions, 300 flow [2023-11-29 03:42:30,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=141, PETRI_TRANSITIONS=141} [2023-11-29 03:42:30,093 INFO L281 CegarLoopForPetriNet]: 185 programPoint places, -44 predicate places. [2023-11-29 03:42:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 141 transitions, 300 flow [2023-11-29 03:42:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 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) [2023-11-29 03:42:30,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:30,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:42:30,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 03:42:30,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2023-11-29 03:42:30,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash 984547, now seen corresponding path program 1 times [2023-11-29 03:42:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:30,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478148868] [2023-11-29 03:42:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:30,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:30,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478148868] [2023-11-29 03:42:30,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478148868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:30,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:42:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:42:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565136020] [2023-11-29 03:42:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:30,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:42:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:42:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:42:30,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 190 [2023-11-29 03:42:30,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 141 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:30,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:30,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 190 [2023-11-29 03:42:30,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand