./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6bed9188bb7b7687ebd02ffac8f3cae5646a3288850778355d808dde868a6cf7 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:24:03,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:24:03,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:24:03,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:24:03,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:24:03,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:24:03,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:24:03,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:24:03,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:24:03,226 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:24:03,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:24:03,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:24:03,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:24:03,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:24:03,229 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:24:03,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:24:03,229 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:24:03,229 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:24:03,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:24:03,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:24:03,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:24:03,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:24:03,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:24:03,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:24:03,232 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:24:03,232 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:24:03,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:24:03,232 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:24:03,233 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:24:03,233 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:24:03,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:24:03,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:24:03,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:24:03,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:24:03,234 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:24:03,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:24:03,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:24:03,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:24:03,235 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:24:03,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:24:03,235 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:24:03,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:24:03,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:24:03,236 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bed9188bb7b7687ebd02ffac8f3cae5646a3288850778355d808dde868a6cf7 [2024-06-27 17:24:03,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:24:03,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:24:03,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:24:03,488 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:24:03,491 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:24:03,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i [2024-06-27 17:24:04,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:24:04,896 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:24:04,896 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i [2024-06-27 17:24:04,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2b87a20/c48995f8e6734ee1af943bae3ff2a754/FLAGf1be1a0c7 [2024-06-27 17:24:04,925 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2b87a20/c48995f8e6734ee1af943bae3ff2a754 [2024-06-27 17:24:04,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:24:04,928 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:24:04,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:24:04,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:24:04,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:24:04,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:24:04" (1/1) ... [2024-06-27 17:24:04,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a506e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:04, skipping insertion in model container [2024-06-27 17:24:04,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:24:04" (1/1) ... [2024-06-27 17:24:04,986 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:24:05,323 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i[31359,31372] [2024-06-27 17:24:05,345 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:24:05,363 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:24:05,398 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i[31359,31372] [2024-06-27 17:24:05,401 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:24:05,438 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:24:05,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05 WrapperNode [2024-06-27 17:24:05,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:24:05,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:24:05,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:24:05,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:24:05,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,455 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,475 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 133 [2024-06-27 17:24:05,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:24:05,476 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:24:05,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:24:05,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:24:05,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,500 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 5, 5]. 42 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 0 writes are split as follows [0, 0, 0]. [2024-06-27 17:24:05,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:24:05,516 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:24:05,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:24:05,516 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:24:05,517 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (1/1) ... [2024-06-27 17:24:05,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:24:05,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:24:05,574 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) [2024-06-27 17:24:05,590 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 [2024-06-27 17:24:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 17:24:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 17:24:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 17:24:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:24:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:24:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:24:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:24:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:24:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:24:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 17:24:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:24:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:24:05,642 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:24:05,800 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:24:05,802 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:24:06,049 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:24:06,050 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:24:06,243 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:24:06,243 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 17:24:06,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:24:06 BoogieIcfgContainer [2024-06-27 17:24:06,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:24:06,246 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:24:06,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:24:06,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:24:06,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:24:04" (1/3) ... [2024-06-27 17:24:06,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d7bd25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:24:06, skipping insertion in model container [2024-06-27 17:24:06,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:24:05" (2/3) ... [2024-06-27 17:24:06,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d7bd25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:24:06, skipping insertion in model container [2024-06-27 17:24:06,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:24:06" (3/3) ... [2024-06-27 17:24:06,252 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2-pthread.i [2024-06-27 17:24:06,260 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:24:06,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:24:06,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:24:06,271 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:24:06,345 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:24:06,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 74 flow [2024-06-27 17:24:06,451 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2024-06-27 17:24:06,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:24:06,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 37 events. 4/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-06-27 17:24:06,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 74 flow [2024-06-27 17:24:06,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 74 flow [2024-06-27 17:24:06,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:24:06,483 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@7b06e027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:24:06,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:24:06,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:24:06,489 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-27 17:24:06,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:24:06,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:24:06,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 17:24:06,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 17:24:06,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:24:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1797391039, now seen corresponding path program 1 times [2024-06-27 17:24:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:24:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42593836] [2024-06-27 17:24:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:24:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:24:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:06,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:24:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:06,660 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:24:06,662 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:24:06,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 17:24:06,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 17:24:06,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 17:24:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:24:06,666 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 17:24:06,672 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:24:06,672 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 17:24:06,728 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:24:06,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 140 flow [2024-06-27 17:24:06,761 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2024-06-27 17:24:06,762 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:24:06,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 8/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 61. Up to 3 conditions per place. [2024-06-27 17:24:06,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 65 transitions, 140 flow [2024-06-27 17:24:06,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 65 transitions, 140 flow [2024-06-27 17:24:06,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:24:06,769 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@7b06e027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:24:06,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 17:24:06,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:24:06,780 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-06-27 17:24:06,780 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:24:06,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:24:06,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 17:24:06,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 17:24:06,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:24:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1175873023, now seen corresponding path program 1 times [2024-06-27 17:24:06,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:24:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454503450] [2024-06-27 17:24:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:24:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:24:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:06,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:24:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:06,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:24:06,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:24:06,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 17:24:06,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 17:24:06,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 17:24:06,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 17:24:06,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:24:06,832 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 17:24:06,833 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:24:06,833 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 17:24:06,897 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:24:06,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 95 transitions, 208 flow [2024-06-27 17:24:06,936 INFO L124 PetriNetUnfolderBase]: 12/103 cut-off events. [2024-06-27 17:24:06,936 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 17:24:06,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 12/103 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 270 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2024-06-27 17:24:06,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 95 transitions, 208 flow [2024-06-27 17:24:06,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 95 transitions, 208 flow [2024-06-27 17:24:06,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:24:06,948 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@7b06e027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:24:06,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:24:06,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:24:06,964 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-06-27 17:24:06,964 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 17:24:06,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:24:06,965 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-06-27 17:24:06,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:24:06,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:24:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 535307744, now seen corresponding path program 1 times [2024-06-27 17:24:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:24:06,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422044275] [2024-06-27 17:24:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:24:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:24:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:07,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:24:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:07,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:24:07,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:24:07,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 17:24:07,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 17:24:07,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 17:24:07,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 17:24:07,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 17:24:07,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:24:07,032 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 17:24:07,032 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:24:07,032 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 17:24:07,132 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:24:07,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 125 transitions, 278 flow [2024-06-27 17:24:07,173 INFO L124 PetriNetUnfolderBase]: 16/136 cut-off events. [2024-06-27 17:24:07,174 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 17:24:07,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 136 events. 16/136 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 439 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 119. Up to 5 conditions per place. [2024-06-27 17:24:07,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 125 transitions, 278 flow [2024-06-27 17:24:07,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 125 transitions, 278 flow [2024-06-27 17:24:07,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:24:07,192 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@7b06e027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:24:07,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 17:24:07,207 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:24:07,207 INFO L124 PetriNetUnfolderBase]: 4/60 cut-off events. [2024-06-27 17:24:07,207 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 17:24:07,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:24:07,208 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-06-27 17:24:07,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 17:24:07,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:24:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash -477871338, now seen corresponding path program 1 times [2024-06-27 17:24:07,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:24:07,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331798419] [2024-06-27 17:24:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:24:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:24:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:07,238 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:24:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:07,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:24:07,272 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:24:07,272 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-06-27 17:24:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-06-27 17:24:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-06-27 17:24:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-06-27 17:24:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-06-27 17:24:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-06-27 17:24:07,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:24:07,274 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 17:24:07,274 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:24:07,274 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-06-27 17:24:07,362 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:24:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 155 transitions, 350 flow [2024-06-27 17:24:07,408 INFO L124 PetriNetUnfolderBase]: 20/169 cut-off events. [2024-06-27 17:24:07,408 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 17:24:07,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 169 events. 20/169 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 587 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2024-06-27 17:24:07,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 155 transitions, 350 flow [2024-06-27 17:24:07,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 155 transitions, 350 flow [2024-06-27 17:24:07,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:24:07,420 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@7b06e027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:24:07,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:24:07,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:24:07,433 INFO L124 PetriNetUnfolderBase]: 7/88 cut-off events. [2024-06-27 17:24:07,433 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 17:24:07,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:24:07,434 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:24:07,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-06-27 17:24:07,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:24:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 357078271, now seen corresponding path program 1 times [2024-06-27 17:24:07,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:24:07,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543619883] [2024-06-27 17:24:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:24:07,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:24:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:07,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:24:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:24:07,474 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:24:07,474 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:24:07,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-06-27 17:24:07,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-06-27 17:24:07,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-06-27 17:24:07,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-06-27 17:24:07,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-06-27 17:24:07,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-06-27 17:24:07,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-06-27 17:24:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:24:07,476 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 17:24:07,477 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:24:07,477 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-06-27 17:24:07,547 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:24:07,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 185 transitions, 424 flow [2024-06-27 17:24:07,578 INFO L124 PetriNetUnfolderBase]: 24/202 cut-off events. [2024-06-27 17:24:07,579 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-27 17:24:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 202 events. 24/202 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 761 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 194. Up to 7 conditions per place. [2024-06-27 17:24:07,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 185 transitions, 424 flow [2024-06-27 17:24:07,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 185 transitions, 424 flow [2024-06-27 17:24:07,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:24:07,585 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@7b06e027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:24:07,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 17:24:07,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:24:07,596 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2024-06-27 17:24:07,596 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 17:24:07,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:24:07,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:24:07,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-06-27 17:24:07,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:24:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -828296493, now seen corresponding path program 1 times [2024-06-27 17:24:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:24:07,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255959307] [2024-06-27 17:24:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:24:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:24:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:24:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:24:07,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:24:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255959307] [2024-06-27 17:24:07,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255959307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:24:07,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:24:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:24:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449476248] [2024-06-27 17:24:07,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:24:07,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:24:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:24:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:24:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:24:07,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 185 [2024-06-27 17:24:07,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 185 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:24:07,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:24:07,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 185 [2024-06-27 17:24:07,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand