/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 FINITE_AUTOMATA -i ../../../trunk/examples/svcomp/pthread/twostage_3.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 17:06:40,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 17:06:40,918 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 17:06:40,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 17:06:40,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 17:06:40,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 17:06:40,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 17:06:40,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 17:06:40,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 17:06:40,950 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 17:06:40,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 17:06:40,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 17:06:40,951 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 17:06:40,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 17:06:40,952 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 17:06:40,952 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 17:06:40,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 17:06:40,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 17:06:40,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 17:06:40,953 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 -> FINITE_AUTOMATA [2025-04-13 17:06:41,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 17:06:41,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 17:06:41,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 17:06:41,185 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 17:06:41,187 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 17:06:41,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/twostage_3.i [2025-04-13 17:06:42,536 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9b56b81/8d8246a4a9f0466080f30b7f0aeb6daf/FLAGa2beff46e [2025-04-13 17:06:42,842 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 17:06:42,843 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/twostage_3.i [2025-04-13 17:06:42,865 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9b56b81/8d8246a4a9f0466080f30b7f0aeb6daf/FLAGa2beff46e [2025-04-13 17:06:43,587 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9b56b81/8d8246a4a9f0466080f30b7f0aeb6daf [2025-04-13 17:06:43,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 17:06:43,591 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 17:06:43,593 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 17:06:43,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 17:06:43,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 17:06:43,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 05:06:43" (1/1) ... [2025-04-13 17:06:43,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1eac4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:43, skipping insertion in model container [2025-04-13 17:06:43,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 05:06:43" (1/1) ... [2025-04-13 17:06:43,634 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 17:06:44,040 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/twostage_3.i[59093,59106] [2025-04-13 17:06:44,055 WARN L1730 CHandler]: Possible shadowing of function lock [2025-04-13 17:06:44,056 WARN L1730 CHandler]: Possible shadowing of function lock [2025-04-13 17:06:44,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 17:06:44,063 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 17:06:44,125 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/twostage_3.i[59093,59106] [2025-04-13 17:06:44,131 WARN L1730 CHandler]: Possible shadowing of function lock [2025-04-13 17:06:44,132 WARN L1730 CHandler]: Possible shadowing of function lock [2025-04-13 17:06:44,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 17:06:44,184 INFO L204 MainTranslator]: Completed translation [2025-04-13 17:06:44,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44 WrapperNode [2025-04-13 17:06:44,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 17:06:44,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 17:06:44,186 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 17:06:44,186 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 17:06:44,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,234 INFO L138 Inliner]: procedures = 373, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 128 [2025-04-13 17:06:44,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 17:06:44,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 17:06:44,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 17:06:44,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 17:06:44,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,261 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-04-13 17:06:44,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,266 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,269 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,270 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 17:06:44,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 17:06:44,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 17:06:44,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 17:06:44,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (1/1) ... [2025-04-13 17:06:44,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 17:06:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 17:06:44,300 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 17:06:44,302 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 17:06:44,318 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2025-04-13 17:06:44,319 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2025-04-13 17:06:44,319 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 17:06:44,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 17:06:44,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 17:06:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 17:06:44,321 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 17:06:44,425 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 17:06:44,426 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 17:06:44,629 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 17:06:44,630 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 17:06:44,630 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 17:06:44,843 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 17:06:44,845 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 17:06:44,848 WARN L179 LargeBlockEncoding]: Complex 3:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 17:06:44,854 WARN L179 LargeBlockEncoding]: Complex 2:5 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 17:06:44,889 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 17:06:44,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 05:06:44 BoogieIcfgContainer [2025-04-13 17:06:44,890 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 17:06:44,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 17:06:44,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 17:06:44,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 17:06:44,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 05:06:43" (1/3) ... [2025-04-13 17:06:44,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a1cfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 05:06:44, skipping insertion in model container [2025-04-13 17:06:44,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 05:06:44" (2/3) ... [2025-04-13 17:06:44,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a1cfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 05:06:44, skipping insertion in model container [2025-04-13 17:06:44,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 05:06:44" (3/3) ... [2025-04-13 17:06:44,895 INFO L128 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2025-04-13 17:06:44,905 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 17:06:44,908 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG twostage_3.i that has 3 procedures, 37 locations, 49 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-13 17:06:44,909 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 17:06:44,959 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-13 17:06:44,983 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 53 transitions, 126 flow [2025-04-13 17:06:45,090 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1114 states, 1105 states have (on average 2.648868778280543) internal successors, (2927), 1113 states have internal predecessors, (2927), 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 17:06:45,111 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 17:06:45,120 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=FINITE_AUTOMATA, 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;@422a5a81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 17:06:45,120 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 17:06:45,124 INFO L278 IsEmpty]: Start isEmpty. Operand has 1114 states, 1105 states have (on average 2.648868778280543) internal successors, (2927), 1113 states have internal predecessors, (2927), 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 17:06:45,128 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-04-13 17:06:45,128 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 17:06:45,128 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-04-13 17:06:45,128 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 17:06:45,133 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 17:06:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 16713913, now seen corresponding path program 1 times [2025-04-13 17:06:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 17:06:45,139 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272943753] [2025-04-13 17:06:45,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 17:06:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 17:06:45,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 17:06:45,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 17:06:45,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 17:06:45,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 17:06:45,242 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 17:06:45,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 17:06:45,282 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 17:06:45,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 17:06:45,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 17:06:45,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 17:06:45,306 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 17:06:45,307 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-04-13 17:06:45,308 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-13 17:06:45,308 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-04-13 17:06:45,308 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-04-13 17:06:45,309 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 17:06:45,311 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 17:06:45,313 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 17:06:45,313 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 17:06:45,357 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2025-04-13 17:06:45,359 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 74 places, 85 transitions, 214 flow [2025-04-13 17:06:51,526 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 253072 states, 253033 states have (on average 4.57476297558026) internal successors, (1157566), 253071 states have internal predecessors, (1157566), 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 17:06:51,528 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 17:06:51,528 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=FINITE_AUTOMATA, 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;@422a5a81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 17:06:51,528 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 17:06:51,925 INFO L278 IsEmpty]: Start isEmpty. Operand has 253072 states, 253033 states have (on average 4.57476297558026) internal successors, (1157566), 253071 states have internal predecessors, (1157566), 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 17:06:51,926 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-04-13 17:06:51,926 INFO L210 NwaCegarLoop]: Found error trace [2025-04-13 17:06:51,926 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2025-04-13 17:06:51,926 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-04-13 17:06:51,927 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 17:06:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1336094810, now seen corresponding path program 1 times [2025-04-13 17:06:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 17:06:51,927 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63995543] [2025-04-13 17:06:51,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 17:06:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 17:06:51,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 17:06:51,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 17:06:51,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 17:06:51,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 17:06:51,988 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 17:06:51,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 17:06:52,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 17:06:52,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 17:06:52,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 17:06:52,018 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 17:06:52,018 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 17:06:52,019 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-04-13 17:06:52,019 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2025-04-13 17:06:52,019 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-04-13 17:06:52,019 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-04-13 17:06:52,019 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-13 17:06:52,019 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 17:06:52,022 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 17:06:52,022 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 17:06:52,022 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 17:06:52,071 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2025-04-13 17:06:52,075 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 105 places, 117 transitions, 306 flow