./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:43:37,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:43:37,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:43:37,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:43:37,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:43:37,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:43:37,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:43:37,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:43:37,419 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:43:37,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:43:37,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:43:37,419 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:43:37,419 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:43:37,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:43:37,419 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:43:37,420 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:43:37,420 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:43:37,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:43:37,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:43:37,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:43:37,420 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:43:37,420 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:43:37,421 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:43:37,421 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:43:37,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:43:37,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:43:37,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:43:37,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:43:37,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:43:37,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:43:37,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:43:37,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:43:37,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:43:37,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:43:37,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:43:37,424 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 [2024-11-28 04:43:37,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:43:37,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:43:37,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:43:37,769 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:43:37,769 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:43:37,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2024-11-28 04:43:40,925 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/data/3a0373079/d67e7c4de20e4c40ba97a3402dd61196/FLAGe23b17911 [2024-11-28 04:43:41,346 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:43:41,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2024-11-28 04:43:41,379 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/data/3a0373079/d67e7c4de20e4c40ba97a3402dd61196/FLAGe23b17911 [2024-11-28 04:43:41,410 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/data/3a0373079/d67e7c4de20e4c40ba97a3402dd61196 [2024-11-28 04:43:41,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:43:41,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:43:41,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:43:41,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:43:41,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:43:41,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:43:41" (1/1) ... [2024-11-28 04:43:41,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df787f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:41, skipping insertion in model container [2024-11-28 04:43:41,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:43:41" (1/1) ... [2024-11-28 04:43:41,486 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:43:42,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:43:42,164 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:43:42,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:43:42,354 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:43:42,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42 WrapperNode [2024-11-28 04:43:42,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:43:42,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:43:42,358 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:43:42,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:43:42,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,471 INFO L138 Inliner]: procedures = 179, calls = 47, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 2109 [2024-11-28 04:43:42,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:43:42,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:43:42,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:43:42,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:43:42,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,534 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 6, 12, 4]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 2, 1]. The 9 writes are split as follows [0, 2, 5, 2]. [2024-11-28 04:43:42,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,586 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,619 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:43:42,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:43:42,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:43:42,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:43:42,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (1/1) ... [2024-11-28 04:43:42,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:43:42,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:43:42,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:43:42,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cba53fa1-d727-4451-b553-a793371d91bb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:43:42,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:43:42,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:43:42,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:43:42,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 04:43:42,753 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-28 04:43:42,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-28 04:43:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:43:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:43:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:43:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 04:43:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:43:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:43:42,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:43:42,759 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:43:42,943 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:43:42,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:43:45,907 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:43:45,908 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:51:52,127 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:51:52,129 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 04:51:52,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:52 BoogieIcfgContainer [2024-11-28 04:51:52,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:51:52,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:51:52,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:51:52,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:51:52,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:43:41" (1/3) ... [2024-11-28 04:51:52,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bb6a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:51:52, skipping insertion in model container [2024-11-28 04:51:52,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:42" (2/3) ... [2024-11-28 04:51:52,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bb6a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:51:52, skipping insertion in model container [2024-11-28 04:51:52,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:52" (3/3) ... [2024-11-28 04:51:52,145 INFO L128 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2024-11-28 04:51:52,162 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:51:52,164 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 26_stack_cas_longest-2.i that has 2 procedures, 74 locations, 1 initial locations, 3 loop locations, and 40 error locations. [2024-11-28 04:51:52,164 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:51:53,412 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 04:51:53,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 83 transitions, 170 flow [2024-11-28 04:51:54,308 INFO L124 PetriNetUnfolderBase]: 9/87 cut-off events. [2024-11-28 04:51:54,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:51:54,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 87 events. 9/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 203 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 80. Up to 3 conditions per place. [2024-11-28 04:51:54,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 83 transitions, 170 flow [2024-11-28 04:51:54,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 83 transitions, 170 flow [2024-11-28 04:51:54,334 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:51:54,350 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f375c0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:51:54,350 INFO L334 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2024-11-28 04:51:54,682 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:51:54,683 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-28 04:51:54,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:51:54,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:51:54,684 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:51:54,684 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 04:51:54,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash 4496367, now seen corresponding path program 1 times [2024-11-28 04:51:54,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398557968] [2024-11-28 04:51:54,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms