./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/goblint-regression/28-race_reach_41-trylock_racefree.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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:13:01,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:13:01,135 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:13:01,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:13:01,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:13:01,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:13:01,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:13:01,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:13:01,172 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:13:01,176 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:13:01,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:13:01,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:13:01,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:13:01,177 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:13:01,177 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:13:01,178 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:13:01,178 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:13:01,178 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:13:01,178 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:13:01,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:13:01,178 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:13:01,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:13:01,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:13:01,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:13:01,179 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:13:01,179 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:13:01,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:13:01,180 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:13:01,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:13:01,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:13:01,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:13:01,180 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:13:01,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:13:01,181 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:13:01,181 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:13:01,181 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:13:01,181 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:13:01,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:13:01,181 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:13:01,181 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:13:01,182 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:13:01,182 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:13:01,182 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:13:01,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2024-01-27 15:13:01,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:13:01,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:13:01,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:13:01,354 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:13:01,354 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:13:01,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-01-27 15:13:02,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:13:02,760 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:13:02,760 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-01-27 15:13:02,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64af60ceb/b5504a2826a64c5a8826bc3c25315443/FLAG1605d7e74 [2024-01-27 15:13:02,781 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64af60ceb/b5504a2826a64c5a8826bc3c25315443 [2024-01-27 15:13:02,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:13:02,784 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:13:02,785 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:13:02,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:13:02,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:13:02,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:13:02" (1/1) ... [2024-01-27 15:13:02,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ef062d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:02, skipping insertion in model container [2024-01-27 15:13:02,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:13:02" (1/1) ... [2024-01-27 15:13:02,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:13:03,060 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2024-01-27 15:13:03,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:13:03,095 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:13:03,120 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2024-01-27 15:13:03,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:13:03,176 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:13:03,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03 WrapperNode [2024-01-27 15:13:03,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:13:03,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:13:03,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:13:03,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:13:03,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,212 INFO L138 Inliner]: procedures = 172, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-01-27 15:13:03,212 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:13:03,213 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:13:03,213 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:13:03,213 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:13:03,221 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,223 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,233 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-01-27 15:13:03,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,237 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:13:03,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:13:03,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:13:03,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:13:03,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (1/1) ... [2024-01-27 15:13:03,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:13:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:03,269 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) [2024-01-27 15:13:03,286 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 [2024-01-27 15:13:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:13:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:13:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:13:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:13:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:13:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-01-27 15:13:03,306 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-01-27 15:13:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:13:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-01-27 15:13:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:13:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:13:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:13:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:13:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:13:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:13:03,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:13:03,309 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:13:03,433 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:13:03,436 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:13:03,631 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:13:03,631 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:13:03,727 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:13:03,728 INFO L320 CfgBuilder]: Removed 11 assume(true) statements. [2024-01-27 15:13:03,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:13:03 BoogieIcfgContainer [2024-01-27 15:13:03,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:13:03,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:13:03,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:13:03,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:13:03,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:13:02" (1/3) ... [2024-01-27 15:13:03,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1620c602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:13:03, skipping insertion in model container [2024-01-27 15:13:03,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:13:03" (2/3) ... [2024-01-27 15:13:03,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1620c602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:13:03, skipping insertion in model container [2024-01-27 15:13:03,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:13:03" (3/3) ... [2024-01-27 15:13:03,734 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2024-01-27 15:13:03,739 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:13:03,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:13:03,746 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:13:03,746 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:13:03,775 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-01-27 15:13:03,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 51 transitions, 109 flow [2024-01-27 15:13:03,822 INFO L124 PetriNetUnfolderBase]: 17/73 cut-off events. [2024-01-27 15:13:03,822 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:13:03,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 73 events. 17/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 227 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2024-01-27 15:13:03,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 51 transitions, 109 flow [2024-01-27 15:13:03,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 49 transitions, 102 flow [2024-01-27 15:13:03,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:03,840 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;@398754d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:03,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:13:03,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:03,850 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-01-27 15:13:03,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:13:03,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:03,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 15:13:03,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:03,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1424128212, now seen corresponding path program 1 times [2024-01-27 15:13:03,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:03,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416555765] [2024-01-27 15:13:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:03,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:03,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:13:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:04,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:13:04,028 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:13:04,029 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 15:13:04,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 15:13:04,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:13:04,031 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:13:04,052 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:13:04,052 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:13:04,073 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:13:04,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 76 transitions, 168 flow [2024-01-27 15:13:04,150 INFO L124 PetriNetUnfolderBase]: 30/127 cut-off events. [2024-01-27 15:13:04,150 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 15:13:04,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 127 events. 30/127 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 490 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 77. Up to 9 conditions per place. [2024-01-27 15:13:04,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 76 transitions, 168 flow [2024-01-27 15:13:04,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 76 transitions, 168 flow [2024-01-27 15:13:04,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:04,160 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;@398754d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:04,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:13:04,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:04,164 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-01-27 15:13:04,164 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:13:04,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:04,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:04,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:04,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2137658440, now seen corresponding path program 1 times [2024-01-27 15:13:04,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:04,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193213827] [2024-01-27 15:13:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:04,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193213827] [2024-01-27 15:13:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193213827] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:04,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386383058] [2024-01-27 15:13:04,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:04,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:04,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 76 [2024-01-27 15:13:04,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-01-27 15:13:04,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:04,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 76 [2024-01-27 15:13:04,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:04,918 INFO L124 PetriNetUnfolderBase]: 2713/5239 cut-off events. [2024-01-27 15:13:04,918 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-01-27 15:13:04,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9606 conditions, 5239 events. 2713/5239 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 36667 event pairs, 2430 based on Foata normal form. 1371/6139 useless extension candidates. Maximal degree in co-relation 7056. Up to 4298 conditions per place. [2024-01-27 15:13:04,940 INFO L140 encePairwiseOnDemand]: 57/76 looper letters, 38 selfloop transitions, 2 changer transitions 11/71 dead transitions. [2024-01-27 15:13:04,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 256 flow [2024-01-27 15:13:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:13:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:13:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-01-27 15:13:04,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-01-27 15:13:04,950 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 168 flow. Second operand 3 states and 138 transitions. [2024-01-27 15:13:04,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 256 flow [2024-01-27 15:13:04,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:13:04,960 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 120 flow [2024-01-27 15:13:04,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2024-01-27 15:13:04,964 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-01-27 15:13:04,964 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 120 flow [2024-01-27 15:13:04,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-01-27 15:13:04,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:04,965 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 15:13:04,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:13:04,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:04,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash -183439161, now seen corresponding path program 1 times [2024-01-27 15:13:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:04,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070349368] [2024-01-27 15:13:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:05,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:13:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:05,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:13:05,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:13:05,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 15:13:05,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 15:13:05,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:13:05,037 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:13:05,037 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:13:05,038 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:13:05,065 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:13:05,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 101 transitions, 229 flow [2024-01-27 15:13:05,082 INFO L124 PetriNetUnfolderBase]: 46/192 cut-off events. [2024-01-27 15:13:05,082 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 15:13:05,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 192 events. 46/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 811 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2024-01-27 15:13:05,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 101 transitions, 229 flow [2024-01-27 15:13:05,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 101 transitions, 229 flow [2024-01-27 15:13:05,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:05,089 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;@398754d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:05,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:13:05,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:05,164 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-01-27 15:13:05,164 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:13:05,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:05,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:05,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:05,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 274178765, now seen corresponding path program 1 times [2024-01-27 15:13:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:05,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105604202] [2024-01-27 15:13:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:05,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:05,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105604202] [2024-01-27 15:13:05,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105604202] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:05,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:05,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:05,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592527533] [2024-01-27 15:13:05,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:05,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:05,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:05,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:05,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:05,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 101 [2024-01-27 15:13:05,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2024-01-27 15:13:05,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:05,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 101 [2024-01-27 15:13:05,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:10,608 INFO L124 PetriNetUnfolderBase]: 42400/68728 cut-off events. [2024-01-27 15:13:10,608 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2024-01-27 15:13:10,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128464 conditions, 68728 events. 42400/68728 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 583574 event pairs, 41149 based on Foata normal form. 20138/83678 useless extension candidates. Maximal degree in co-relation 74950. Up to 58925 conditions per place. [2024-01-27 15:13:10,887 INFO L140 encePairwiseOnDemand]: 76/101 looper letters, 48 selfloop transitions, 2 changer transitions 12/90 dead transitions. [2024-01-27 15:13:10,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 327 flow [2024-01-27 15:13:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:13:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:13:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-01-27 15:13:10,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907590759075908 [2024-01-27 15:13:10,890 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 229 flow. Second operand 3 states and 179 transitions. [2024-01-27 15:13:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 327 flow [2024-01-27 15:13:10,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:13:10,898 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 164 flow [2024-01-27 15:13:10,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-01-27 15:13:10,899 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-01-27 15:13:10,899 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 164 flow [2024-01-27 15:13:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2024-01-27 15:13:10,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:10,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:10,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:13:10,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:10,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash 19170239, now seen corresponding path program 1 times [2024-01-27 15:13:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:10,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536034894] [2024-01-27 15:13:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536034894] [2024-01-27 15:13:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536034894] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060787003] [2024-01-27 15:13:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:10,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:10,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:13:10,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:13:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:11,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:13:11,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:11,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:13:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:11,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060787003] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:13:11,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:13:11,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-27 15:13:11,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735053314] [2024-01-27 15:13:11,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:13:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:13:11,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:11,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:13:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:13:11,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 101 [2024-01-27 15:13:11,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 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) [2024-01-27 15:13:11,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:11,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 101 [2024-01-27 15:13:11,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:13:12,057 INFO L124 PetriNetUnfolderBase]: 7668/13178 cut-off events. [2024-01-27 15:13:12,057 INFO L125 PetriNetUnfolderBase]: For 3229/3229 co-relation queries the response was YES. [2024-01-27 15:13:12,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25738 conditions, 13178 events. 7668/13178 cut-off events. For 3229/3229 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 97995 event pairs, 1790 based on Foata normal form. 1110/14134 useless extension candidates. Maximal degree in co-relation 2635. Up to 7400 conditions per place. [2024-01-27 15:13:12,109 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-01-27 15:13:12,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 446 flow [2024-01-27 15:13:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:13:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:13:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 275 transitions. [2024-01-27 15:13:12,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537953795379538 [2024-01-27 15:13:12,111 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 164 flow. Second operand 6 states and 275 transitions. [2024-01-27 15:13:12,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 446 flow [2024-01-27 15:13:12,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:13:12,115 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-01-27 15:13:12,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-01-27 15:13:12,116 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2024-01-27 15:13:12,117 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-01-27 15:13:12,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 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) [2024-01-27 15:13:12,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:12,117 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 15:13:12,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:13:12,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:12,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:12,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2050232717, now seen corresponding path program 1 times [2024-01-27 15:13:12,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:12,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694086523] [2024-01-27 15:13:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:12,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:12,360 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:13:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:13:12,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:13:12,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:13:12,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-01-27 15:13:12,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-01-27 15:13:12,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:13:12,382 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-27 15:13:12,383 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:13:12,383 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:13:12,413 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:13:12,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 126 transitions, 292 flow [2024-01-27 15:13:12,439 INFO L124 PetriNetUnfolderBase]: 70/281 cut-off events. [2024-01-27 15:13:12,439 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-01-27 15:13:12,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 281 events. 70/281 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1243 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 216. Up to 32 conditions per place. [2024-01-27 15:13:12,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 126 transitions, 292 flow [2024-01-27 15:13:12,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 126 transitions, 292 flow [2024-01-27 15:13:12,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:13:12,444 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;@398754d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:13:12,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:13:12,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:13:12,447 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-01-27 15:13:12,447 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:13:12,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:12,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:12,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:12,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash -136958965, now seen corresponding path program 1 times [2024-01-27 15:13:12,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:12,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617680778] [2024-01-27 15:13:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:12,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:13:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617680778] [2024-01-27 15:13:12,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617680778] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:12,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:13:12,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:13:12,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964714407] [2024-01-27 15:13:12,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:12,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:13:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:13:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:13:12,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 126 [2024-01-27 15:13:12,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-01-27 15:13:12,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:12,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 126 [2024-01-27 15:13:12,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand