/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:38:15,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:38:15,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 19:38:15,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:38:15,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:38:15,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:38:15,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:38:15,185 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:38:15,185 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:38:15,185 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:38:15,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:38:15,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:38:15,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:38:15,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:38:15,185 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:38:15,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:38:15,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:38:15,186 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:38:15,187 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:38:15,188 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:38:15,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:38:15,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:38:15,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:38:15,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:38:15,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:38:15,189 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:38:15,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:38:15,189 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 19:38:15,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:38:15,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:38:15,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:38:15,400 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:38:15,400 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:38:15,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i [2025-04-13 19:38:16,665 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f00eab1/8001b42339b5411ab7d039913631c086/FLAG61dba2bad [2025-04-13 19:38:16,969 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:38:16,970 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i [2025-04-13 19:38:16,994 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f00eab1/8001b42339b5411ab7d039913631c086/FLAG61dba2bad [2025-04-13 19:38:17,715 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f00eab1/8001b42339b5411ab7d039913631c086 [2025-04-13 19:38:17,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:38:17,719 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:38:17,720 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:38:17,720 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:38:17,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:38:17,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:38:17" (1/1) ... [2025-04-13 19:38:17,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a1bf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:17, skipping insertion in model container [2025-04-13 19:38:17,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:38:17" (1/1) ... [2025-04-13 19:38:17,757 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:38:18,218 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i[63614,63627] [2025-04-13 19:38:18,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:38:18,251 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:38:18,340 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack.i[63614,63627] [2025-04-13 19:38:18,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:38:18,417 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:38:18,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18 WrapperNode [2025-04-13 19:38:18,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:38:18,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:38:18,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:38:18,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:38:18,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,569 INFO L138 Inliner]: procedures = 396, calls = 206, calls flagged for inlining = 52, calls inlined = 211, statements flattened = 3772 [2025-04-13 19:38:18,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:38:18,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:38:18,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:38:18,570 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:38:18,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,597 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,793 INFO L175 MemorySlicer]: Split 700 memory accesses to 9 slices as follows [2, 113, 36, 86, 28, 22, 25, 22, 366]. 52 percent of accesses are in the largest equivalence class. The 39 initializations are split as follows [2, 8, 4, 1, 2, 2, 3, 1, 16]. The 287 writes are split as follows [0, 56, 25, 29, 6, 3, 4, 7, 157]. [2025-04-13 19:38:18,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,854 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,872 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,883 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:38:18,924 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:38:18,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:38:18,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:38:18,925 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (1/1) ... [2025-04-13 19:38:18,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:38:18,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:38:18,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 19:38:18,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2025-04-13 19:38:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2025-04-13 19:38:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2025-04-13 19:38:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2025-04-13 19:38:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:38:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-04-13 19:38:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-04-13 19:38:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#8 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-04-13 19:38:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2025-04-13 19:38:18,976 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2025-04-13 19:38:18,976 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2025-04-13 19:38:18,976 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2025-04-13 19:38:18,976 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:38:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 19:38:18,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-04-13 19:38:18,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-04-13 19:38:18,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-04-13 19:38:18,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-04-13 19:38:18,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-04-13 19:38:18,980 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:38:19,249 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:38:19,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:38:21,903 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:38:21,904 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:38:21,904 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:38:24,395 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,478 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,489 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,545 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,555 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,567 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,578 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,589 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,676 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,688 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,700 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,712 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,724 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,738 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,750 WARN L179 LargeBlockEncoding]: Complex 4:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:38:24,765 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:38:24,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:38:24 BoogieIcfgContainer [2025-04-13 19:38:24,767 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:38:24,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:38:24,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:38:24,772 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:38:24,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:38:17" (1/3) ... [2025-04-13 19:38:24,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bb2889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:38:24, skipping insertion in model container [2025-04-13 19:38:24,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:38:18" (2/3) ... [2025-04-13 19:38:24,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bb2889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:38:24, skipping insertion in model container [2025-04-13 19:38:24,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:38:24" (3/3) ... [2025-04-13 19:38:24,774 INFO L128 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.i [2025-04-13 19:38:24,785 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:38:24,787 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elimination_backoff_stack.i that has 8 procedures, 269 locations, 366 edges, 1 initial locations, 0 loop locations, and 7 error locations. [2025-04-13 19:38:24,787 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:38:25,656 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:38:25,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 373 transitions, 774 flow [2025-04-13 19:38:25,952 INFO L116 PetriNetUnfolderBase]: 105/366 cut-off events. [2025-04-13 19:38:25,956 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:38:25,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 366 events. 105/366 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1739 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 376. Up to 11 conditions per place. [2025-04-13 19:38:25,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 373 transitions, 774 flow [2025-04-13 19:38:25,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 366 transitions, 753 flow [2025-04-13 19:38:25,999 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:38:26,009 INFO L340 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=LoopHeads, 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;@6680098, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:38:26,009 INFO L341 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2025-04-13 19:38:26,038 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:38:26,038 INFO L116 PetriNetUnfolderBase]: 4/35 cut-off events. [2025-04-13 19:38:26,038 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:38:26,038 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:38:26,039 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:38:26,039 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting instrPush0Err0ASSERT_VIOLATIONERROR_FUNCTION === [instrPop3Err0ASSERT_VIOLATIONERROR_FUNCTION, instrPop4Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 18 more)] === [2025-04-13 19:38:26,043 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:38:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1135421951, now seen corresponding path program 1 times [2025-04-13 19:38:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:38:26,050 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289645977] [2025-04-13 19:38:26,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:38:26,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:38:26,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 19:38:26,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 19:38:26,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:38:26,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:38:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:38:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:38:27,514 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289645977] [2025-04-13 19:38:27,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289645977] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:38:27,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:38:27,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:38:27,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12312500] [2025-04-13 19:38:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:38:27,522 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 19:38:27,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:38:27,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 19:38:27,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-13 19:38:27,546 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 373 [2025-04-13 19:38:27,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 366 transitions, 753 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2025-04-13 19:38:27,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:38:27,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 373 [2025-04-13 19:38:27,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand