./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc-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/01b_inc-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 5fad6244fcf6eaf8307cc493ab8f193eacc838ad9166f53316e6259a46f1eed1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:18:40,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:18:41,094 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:18:41,097 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:18:41,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:18:41,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:18:41,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:18:41,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:18:41,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:18:41,123 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:18:41,123 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:18:41,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:18:41,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:18:41,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:18:41,126 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:18:41,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:18:41,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:18:41,126 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:18:41,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:18:41,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:18:41,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:18:41,128 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:18:41,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:18:41,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:18:41,128 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:18:41,129 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:18:41,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:18:41,129 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:18:41,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:18:41,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:18:41,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:18:41,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:18:41,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:18:41,131 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:18:41,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:18:41,132 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:18:41,132 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:18:41,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:18:41,132 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:18:41,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:18:41,133 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:18:41,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:18:41,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:18:41,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fad6244fcf6eaf8307cc493ab8f193eacc838ad9166f53316e6259a46f1eed1 [2024-06-27 16:18:41,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:18:41,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:18:41,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:18:41,365 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:18:41,366 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:18:41,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2024-06-27 16:18:42,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:18:42,591 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:18:42,591 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2024-06-27 16:18:42,608 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9bc7633e/fe2882b755c647199b3202975ea25280/FLAGf52ef9357 [2024-06-27 16:18:42,617 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9bc7633e/fe2882b755c647199b3202975ea25280 [2024-06-27 16:18:42,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:18:42,620 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:18:42,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:18:42,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:18:42,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:18:42,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:42,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e22969d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42, skipping insertion in model container [2024-06-27 16:18:42,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:42,657 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:18:42,876 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/01b_inc-pthread.i[30747,30760] [2024-06-27 16:18:42,891 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:18:42,900 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:18:42,947 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/01b_inc-pthread.i[30747,30760] [2024-06-27 16:18:42,953 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:18:42,985 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:18:42,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42 WrapperNode [2024-06-27 16:18:42,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:18:42,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:18:42,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:18:42,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:18:42,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,025 INFO L138 Inliner]: procedures = 163, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2024-06-27 16:18:43,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:18:43,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:18:43,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:18:43,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:18:43,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,036 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,045 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-06-27 16:18:43,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,052 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,053 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:18:43,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:18:43,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:18:43,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:18:43,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (1/1) ... [2024-06-27 16:18:43,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:18:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:18:43,118 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 16:18:43,126 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 16:18:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 16:18:43,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 16:18:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 16:18:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:18:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:18:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:18:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:18:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:18:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 16:18:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:18:43,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:18:43,160 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 16:18:43,244 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:18:43,245 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:18:43,378 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:18:43,378 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:18:43,539 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:18:43,539 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-06-27 16:18:43,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:18:43 BoogieIcfgContainer [2024-06-27 16:18:43,539 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:18:43,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:18:43,574 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:18:43,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:18:43,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:18:42" (1/3) ... [2024-06-27 16:18:43,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5ff84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:18:43, skipping insertion in model container [2024-06-27 16:18:43,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:18:42" (2/3) ... [2024-06-27 16:18:43,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5ff84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:18:43, skipping insertion in model container [2024-06-27 16:18:43,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:18:43" (3/3) ... [2024-06-27 16:18:43,597 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc-pthread.i [2024-06-27 16:18:43,604 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:18:43,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:18:43,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:18:43,614 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:18:43,672 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:18:43,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 20 transitions, 44 flow [2024-06-27 16:18:43,733 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-06-27 16:18:43,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:18:43,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 1/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-06-27 16:18:43,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 20 transitions, 44 flow [2024-06-27 16:18:43,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 44 flow [2024-06-27 16:18:43,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:18:43,764 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;@1d32df55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:18:43,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:18:43,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:18:43,773 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-27 16:18:43,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:18:43,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:18:43,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 16:18:43,774 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 16:18:43,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:18:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 310545309, now seen corresponding path program 1 times [2024-06-27 16:18:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:18:43,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464121083] [2024-06-27 16:18:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:18:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:18:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:18:43,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:18:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:18:43,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:18:43,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:18:43,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 16:18:43,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 16:18:43,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 16:18:43,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:18:43,949 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:18:43,952 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:18:43,952 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:18:43,967 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:18:43,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 35 transitions, 80 flow [2024-06-27 16:18:43,984 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2024-06-27 16:18:43,984 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:18:43,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 2/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2024-06-27 16:18:43,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 35 transitions, 80 flow [2024-06-27 16:18:43,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 80 flow [2024-06-27 16:18:43,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:18:43,989 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;@1d32df55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:18:43,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:18:43,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:18:43,999 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2024-06-27 16:18:43,999 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:18:43,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:18:43,999 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 16:18:43,999 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 16:18:44,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:18:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -592772691, now seen corresponding path program 1 times [2024-06-27 16:18:44,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:18:44,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884365089] [2024-06-27 16:18:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:18:44,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:18:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:18:44,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:18:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:18:44,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:18:44,063 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:18:44,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:18:44,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:18:44,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:18:44,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:18:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:18:44,066 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:18:44,066 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:18:44,067 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:18:44,088 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:18:44,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 50 transitions, 118 flow [2024-06-27 16:18:44,115 INFO L124 PetriNetUnfolderBase]: 3/58 cut-off events. [2024-06-27 16:18:44,117 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:18:44,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 3/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2024-06-27 16:18:44,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 50 transitions, 118 flow [2024-06-27 16:18:44,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 50 transitions, 118 flow [2024-06-27 16:18:44,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:18:44,125 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;@1d32df55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:18:44,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:18:44,136 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:18:44,137 INFO L124 PetriNetUnfolderBase]: 0/35 cut-off events. [2024-06-27 16:18:44,137 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:18:44,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:18:44,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:18:44,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:18:44,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:18:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1448173899, now seen corresponding path program 1 times [2024-06-27 16:18:44,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:18:44,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604496376] [2024-06-27 16:18:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:18:44,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:18:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:18:44,401 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 16:18:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:18:44,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604496376] [2024-06-27 16:18:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604496376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:18:44,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:18:44,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:18:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352014714] [2024-06-27 16:18:44,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:18:44,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:18:44,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:18:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:18:44,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:18:44,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 16:18:44,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 16:18:44,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:18:44,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 16:18:44,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:18:45,965 INFO L124 PetriNetUnfolderBase]: 11367/19206 cut-off events. [2024-06-27 16:18:45,966 INFO L125 PetriNetUnfolderBase]: For 706/706 co-relation queries the response was YES. [2024-06-27 16:18:45,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35951 conditions, 19206 events. 11367/19206 cut-off events. For 706/706 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 156442 event pairs, 3321 based on Foata normal form. 0/16619 useless extension candidates. Maximal degree in co-relation 19822. Up to 7422 conditions per place. [2024-06-27 16:18:46,085 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 104 selfloop transitions, 12 changer transitions 0/129 dead transitions. [2024-06-27 16:18:46,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 129 transitions, 546 flow [2024-06-27 16:18:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:18:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:18:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 205 transitions. [2024-06-27 16:18:46,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-27 16:18:46,101 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 118 flow. Second operand 6 states and 205 transitions. [2024-06-27 16:18:46,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 129 transitions, 546 flow [2024-06-27 16:18:46,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 129 transitions, 536 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 16:18:46,111 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 205 flow [2024-06-27 16:18:46,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 16:18:46,120 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-06-27 16:18:46,120 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 205 flow [2024-06-27 16:18:46,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 16:18:46,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:18:46,121 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-06-27 16:18:46,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:18:46,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:18:46,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:18:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash -653441956, now seen corresponding path program 1 times [2024-06-27 16:18:46,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:18:46,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209699675] [2024-06-27 16:18:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:18:46,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:18:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:18:46,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:18:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:18:46,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:18:46,162 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:18:46,162 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:18:46,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:18:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:18:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:18:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:18:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:18:46,163 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:18:46,164 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:18:46,164 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 16:18:46,192 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:18:46,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 65 transitions, 158 flow [2024-06-27 16:18:46,201 INFO L124 PetriNetUnfolderBase]: 4/76 cut-off events. [2024-06-27 16:18:46,201 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:18:46,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 222 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2024-06-27 16:18:46,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 65 transitions, 158 flow [2024-06-27 16:18:46,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 65 transitions, 158 flow [2024-06-27 16:18:46,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:18:46,208 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;@1d32df55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:18:46,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:18:46,211 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:18:46,211 INFO L124 PetriNetUnfolderBase]: 0/35 cut-off events. [2024-06-27 16:18:46,212 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 16:18:46,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:18:46,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:18:46,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:18:46,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:18:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash 744117092, now seen corresponding path program 1 times [2024-06-27 16:18:46,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:18:46,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536777086] [2024-06-27 16:18:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:18:46,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:18:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:18:46,320 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 16:18:46,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:18:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536777086] [2024-06-27 16:18:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536777086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:18:46,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:18:46,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:18:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124339518] [2024-06-27 16:18:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:18:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:18:46,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:18:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:18:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:18:46,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 65 [2024-06-27 16:18:46,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 16:18:46,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:18:46,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 65 [2024-06-27 16:18:46,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:19:03,112 INFO L124 PetriNetUnfolderBase]: 207509/303710 cut-off events. [2024-06-27 16:19:03,113 INFO L125 PetriNetUnfolderBase]: For 16564/16564 co-relation queries the response was YES. [2024-06-27 16:19:04,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580116 conditions, 303710 events. 207509/303710 cut-off events. For 16564/16564 co-relation queries the response was YES. Maximal size of possible extension queue 12236. Compared 2721182 event pairs, 70548 based on Foata normal form. 0/257898 useless extension candidates. Maximal degree in co-relation 131702. Up to 133343 conditions per place. [2024-06-27 16:19:05,483 INFO L140 encePairwiseOnDemand]: 52/65 looper letters, 144 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2024-06-27 16:19:05,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 176 transitions, 772 flow [2024-06-27 16:19:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:19:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:19:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-06-27 16:19:05,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025641025641025 [2024-06-27 16:19:05,490 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 158 flow. Second operand 6 states and 274 transitions. [2024-06-27 16:19:05,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 176 transitions, 772 flow [2024-06-27 16:19:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 176 transitions, 742 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-27 16:19:05,501 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 268 flow [2024-06-27 16:19:05,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-27 16:19:05,503 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2024-06-27 16:19:05,503 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 268 flow [2024-06-27 16:19:05,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 16:19:05,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:19:05,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:19:05,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:19:05,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:19:05,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:19:05,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1604283611, now seen corresponding path program 1 times [2024-06-27 16:19:05,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:19:05,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426604484] [2024-06-27 16:19:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:19:05,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:19:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:19:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:19:05,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:19:05,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426604484] [2024-06-27 16:19:05,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426604484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:19:05,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:19:05,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:19:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259630168] [2024-06-27 16:19:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:19:05,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:19:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:19:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:19:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:19:05,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 65 [2024-06-27 16:19:05,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 16:19:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:19:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 65 [2024-06-27 16:19:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand