./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.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/goblint-regression/28-race_reach_71-funloop_racing.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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:31:44,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:31:44,439 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:31:44,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:31:44,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:31:44,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:31:44,470 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:31:44,471 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:31:44,471 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:31:44,474 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:31:44,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:31:44,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:31:44,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:31:44,477 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:31:44,477 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:31:44,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:31:44,477 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:31:44,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:31:44,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:31:44,478 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:31:44,478 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:31:44,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:31:44,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:31:44,479 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:31:44,479 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:31:44,479 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:31:44,480 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:31:44,480 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:31:44,480 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:31:44,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:31:44,481 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:31:44,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:31:44,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:31:44,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:31:44,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:31:44,482 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:31:44,482 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:31:44,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:31:44,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:31:44,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:31:44,483 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:31:44,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:31:44,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:31:44,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2024-06-27 17:31:44,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:31:44,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:31:44,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:31:44,658 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:31:44,658 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:31:44,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2024-06-27 17:31:45,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:31:46,056 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:31:46,057 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2024-06-27 17:31:46,074 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8f7aa52/66d29c3bd1e84d9380e20a20188c5fcd/FLAG8b37f0e8a [2024-06-27 17:31:46,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8f7aa52/66d29c3bd1e84d9380e20a20188c5fcd [2024-06-27 17:31:46,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:31:46,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:31:46,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:31:46,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:31:46,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:31:46,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57076292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46, skipping insertion in model container [2024-06-27 17:31:46,096 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,149 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:31:46,449 WARN L247 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_71-funloop_racing.i[41323,41336] [2024-06-27 17:31:46,492 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:31:46,513 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:31:46,545 WARN L247 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_71-funloop_racing.i[41323,41336] [2024-06-27 17:31:46,568 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:31:46,629 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:31:46,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46 WrapperNode [2024-06-27 17:31:46,630 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:31:46,631 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:31:46,631 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:31:46,631 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:31:46,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,683 INFO L138 Inliner]: procedures = 272, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 279 [2024-06-27 17:31:46,683 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:31:46,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:31:46,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:31:46,684 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:31:46,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,706 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 5, 16, 2]. 64 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 8 writes are split as follows [0, 0, 7, 1]. [2024-06-27 17:31:46,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:31:46,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:31:46,736 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:31:46,736 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:31:46,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (1/1) ... [2024-06-27 17:31:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:31:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:46,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:31:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 17:31:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:31:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-06-27 17:31:46,835 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-06-27 17:31:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:31:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:31:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:31:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 17:31:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:31:46,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:31:46,836 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:31:47,001 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:31:47,003 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:31:47,273 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:31:47,274 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:31:47,407 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:31:47,408 INFO L320 CfgBuilder]: Removed 35 assume(true) statements. [2024-06-27 17:31:47,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:31:47 BoogieIcfgContainer [2024-06-27 17:31:47,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:31:47,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:31:47,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:31:47,413 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:31:47,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:31:46" (1/3) ... [2024-06-27 17:31:47,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d16efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:31:47, skipping insertion in model container [2024-06-27 17:31:47,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:31:46" (2/3) ... [2024-06-27 17:31:47,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d16efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:31:47, skipping insertion in model container [2024-06-27 17:31:47,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:31:47" (3/3) ... [2024-06-27 17:31:47,415 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2024-06-27 17:31:47,422 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:31:47,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:31:47,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 17:31:47,430 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:31:47,476 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-06-27 17:31:47,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 134 transitions, 275 flow [2024-06-27 17:31:47,567 INFO L124 PetriNetUnfolderBase]: 65/217 cut-off events. [2024-06-27 17:31:47,568 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 17:31:47,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 65/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1025 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2024-06-27 17:31:47,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 134 transitions, 275 flow [2024-06-27 17:31:47,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 132 transitions, 268 flow [2024-06-27 17:31:47,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:31:47,587 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;@64f6af65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:31:47,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:31:47,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:31:47,593 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2024-06-27 17:31:47,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:31:47,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:47,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-06-27 17:31:47,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:31:47,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1523522021, now seen corresponding path program 1 times [2024-06-27 17:31:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:47,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605261605] [2024-06-27 17:31:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:47,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:47,869 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 17:31:47,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:47,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605261605] [2024-06-27 17:31:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605261605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:31:47,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:31:47,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:31:47,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539434637] [2024-06-27 17:31:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:31:47,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:31:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:31:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:31:47,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 134 [2024-06-27 17:31:47,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:47,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:47,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 134 [2024-06-27 17:31:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:48,219 INFO L124 PetriNetUnfolderBase]: 772/2151 cut-off events. [2024-06-27 17:31:48,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:31:48,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 2151 events. 772/2151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 16035 event pairs, 630 based on Foata normal form. 528/2421 useless extension candidates. Maximal degree in co-relation 3478. Up to 1435 conditions per place. [2024-06-27 17:31:48,234 INFO L140 encePairwiseOnDemand]: 98/134 looper letters, 58 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-06-27 17:31:48,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 100 transitions, 324 flow [2024-06-27 17:31:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:31:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:31:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2024-06-27 17:31:48,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323383084577115 [2024-06-27 17:31:48,247 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 268 flow. Second operand 3 states and 214 transitions. [2024-06-27 17:31:48,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 100 transitions, 324 flow [2024-06-27 17:31:48,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:31:48,253 INFO L231 Difference]: Finished difference. Result has 99 places, 100 transitions, 214 flow [2024-06-27 17:31:48,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2024-06-27 17:31:48,258 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 3 predicate places. [2024-06-27 17:31:48,259 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 214 flow [2024-06-27 17:31:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:48,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:48,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-06-27 17:31:48,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:31:48,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:31:48,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1344353360, now seen corresponding path program 1 times [2024-06-27 17:31:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:48,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897852037] [2024-06-27 17:31:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:31:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:48,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897852037] [2024-06-27 17:31:48,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897852037] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:31:48,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209251897] [2024-06-27 17:31:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:48,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:48,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:48,395 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) [2024-06-27 17:31:48,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:31:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:48,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 17:31:48,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:31:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:31:48,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:31:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:31:48,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209251897] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:31:48,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:31:48,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 17:31:48,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554230720] [2024-06-27 17:31:48,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:31:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:31:48,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:48,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:31:48,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:31:48,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 134 [2024-06-27 17:31:48,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:48,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:48,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 134 [2024-06-27 17:31:48,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:48,755 INFO L124 PetriNetUnfolderBase]: 772/2154 cut-off events. [2024-06-27 17:31:48,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:31:48,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 2154 events. 772/2154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 16063 event pairs, 630 based on Foata normal form. 0/1896 useless extension candidates. Maximal degree in co-relation 3595. Up to 1435 conditions per place. [2024-06-27 17:31:48,765 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 58 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2024-06-27 17:31:48,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 103 transitions, 352 flow [2024-06-27 17:31:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:31:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:31:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 306 transitions. [2024-06-27 17:31:48,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805970149253731 [2024-06-27 17:31:48,767 INFO L175 Difference]: Start difference. First operand has 99 places, 100 transitions, 214 flow. Second operand 6 states and 306 transitions. [2024-06-27 17:31:48,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 103 transitions, 352 flow [2024-06-27 17:31:48,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 103 transitions, 348 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:31:48,770 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 246 flow [2024-06-27 17:31:48,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-06-27 17:31:48,771 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 10 predicate places. [2024-06-27 17:31:48,771 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 246 flow [2024-06-27 17:31:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:48,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:48,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-06-27 17:31:48,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:31:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:48,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:31:48,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash 99437403, now seen corresponding path program 2 times [2024-06-27 17:31:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267744092] [2024-06-27 17:31:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:31:49,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:49,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267744092] [2024-06-27 17:31:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267744092] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:31:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470912757] [2024-06-27 17:31:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:31:49,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:49,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:31:49,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:31:49,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:31:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:31:49,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:31:49,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:31:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:31:49,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:31:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:31:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470912757] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:31:49,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:31:49,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:31:49,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880281677] [2024-06-27 17:31:49,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:31:49,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:31:49,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:31:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:31:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 134 [2024-06-27 17:31:49,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 246 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:49,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:49,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 134 [2024-06-27 17:31:49,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:49,562 INFO L124 PetriNetUnfolderBase]: 772/2160 cut-off events. [2024-06-27 17:31:49,562 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-27 17:31:49,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3644 conditions, 2160 events. 772/2160 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 16045 event pairs, 630 based on Foata normal form. 6/1909 useless extension candidates. Maximal degree in co-relation 3586. Up to 1435 conditions per place. [2024-06-27 17:31:49,573 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 58 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2024-06-27 17:31:49,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 420 flow [2024-06-27 17:31:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:31:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:31:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 555 transitions. [2024-06-27 17:31:49,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3451492537313433 [2024-06-27 17:31:49,577 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 246 flow. Second operand 12 states and 555 transitions. [2024-06-27 17:31:49,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 420 flow [2024-06-27 17:31:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 109 transitions, 406 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 17:31:49,582 INFO L231 Difference]: Finished difference. Result has 122 places, 109 transitions, 316 flow [2024-06-27 17:31:49,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=316, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2024-06-27 17:31:49,584 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 26 predicate places. [2024-06-27 17:31:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 316 flow [2024-06-27 17:31:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:49,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-06-27 17:31:49,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 17:31:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-27 17:31:49,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:31:49,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 421410619, now seen corresponding path program 3 times [2024-06-27 17:31:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269916849] [2024-06-27 17:31:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:49,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:31:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:31:49,887 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:31:49,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:31:49,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 17:31:49,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 17:31:49,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 17:31:49,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 17:31:49,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 17:31:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:31:49,892 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 17:31:49,894 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:31:49,894 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 17:31:49,921 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:31:49,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 179 transitions, 374 flow [2024-06-27 17:31:49,942 INFO L124 PetriNetUnfolderBase]: 105/352 cut-off events. [2024-06-27 17:31:49,942 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 17:31:49,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 352 events. 105/352 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1889 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 219. Up to 12 conditions per place. [2024-06-27 17:31:49,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 179 transitions, 374 flow [2024-06-27 17:31:49,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 179 transitions, 374 flow [2024-06-27 17:31:49,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:31:49,949 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;@64f6af65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:31:49,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 17:31:49,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:31:49,954 INFO L124 PetriNetUnfolderBase]: 14/79 cut-off events. [2024-06-27 17:31:49,954 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:31:49,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:49,954 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-06-27 17:31:49,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-06-27 17:31:49,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1367826724, now seen corresponding path program 1 times [2024-06-27 17:31:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607673464] [2024-06-27 17:31:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:49,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:49,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607673464] [2024-06-27 17:31:49,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607673464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:31:49,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:31:49,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:31:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19534038] [2024-06-27 17:31:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:31:49,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:31:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:31:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:31:49,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2024-06-27 17:31:49,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:49,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:49,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2024-06-27 17:31:49,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:53,931 INFO L124 PetriNetUnfolderBase]: 29293/57078 cut-off events. [2024-06-27 17:31:53,932 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-06-27 17:31:54,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99046 conditions, 57078 events. 29293/57078 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 578702 event pairs, 25003 based on Foata normal form. 15018/65101 useless extension candidates. Maximal degree in co-relation 80566. Up to 41865 conditions per place. [2024-06-27 17:31:54,206 INFO L140 encePairwiseOnDemand]: 132/179 looper letters, 81 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2024-06-27 17:31:54,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 454 flow [2024-06-27 17:31:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:31:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:31:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-06-27 17:31:54,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344506517690876 [2024-06-27 17:31:54,210 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 374 flow. Second operand 3 states and 287 transitions. [2024-06-27 17:31:54,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 454 flow [2024-06-27 17:31:54,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 136 transitions, 454 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:31:54,219 INFO L231 Difference]: Finished difference. Result has 133 places, 136 transitions, 298 flow [2024-06-27 17:31:54,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=133, PETRI_TRANSITIONS=136} [2024-06-27 17:31:54,221 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 3 predicate places. [2024-06-27 17:31:54,221 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 136 transitions, 298 flow [2024-06-27 17:31:54,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:54,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:54,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-06-27 17:31:54,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:31:54,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-06-27 17:31:54,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 486450554, now seen corresponding path program 1 times [2024-06-27 17:31:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:54,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814048921] [2024-06-27 17:31:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814048921] [2024-06-27 17:31:54,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814048921] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:31:54,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904105156] [2024-06-27 17:31:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:54,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:54,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:31:54,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:31:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:54,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 17:31:54,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:31:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:54,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:31:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:54,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904105156] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:31:54,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:31:54,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 17:31:54,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039744616] [2024-06-27 17:31:54,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:31:54,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:31:54,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:54,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:31:54,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:31:54,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2024-06-27 17:31:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 136 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 54.714285714285715) internal successors, (383), 7 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:54,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2024-06-27 17:31:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:31:58,064 INFO L124 PetriNetUnfolderBase]: 29293/57081 cut-off events. [2024-06-27 17:31:58,065 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-06-27 17:31:58,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99062 conditions, 57081 events. 29293/57081 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 578703 event pairs, 25003 based on Foata normal form. 0/50086 useless extension candidates. Maximal degree in co-relation 99049. Up to 41865 conditions per place. [2024-06-27 17:31:58,342 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 81 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-06-27 17:31:58,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 139 transitions, 482 flow [2024-06-27 17:31:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:31:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:31:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2024-06-27 17:31:58,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3789571694599628 [2024-06-27 17:31:58,345 INFO L175 Difference]: Start difference. First operand has 133 places, 136 transitions, 298 flow. Second operand 6 states and 407 transitions. [2024-06-27 17:31:58,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 139 transitions, 482 flow [2024-06-27 17:31:58,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 139 transitions, 478 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:31:58,348 INFO L231 Difference]: Finished difference. Result has 140 places, 139 transitions, 330 flow [2024-06-27 17:31:58,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2024-06-27 17:31:58,351 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 10 predicate places. [2024-06-27 17:31:58,351 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 330 flow [2024-06-27 17:31:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.714285714285715) internal successors, (383), 7 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:31:58,352 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 17:31:58,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 17:31:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:58,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-06-27 17:31:58,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:31:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 588535388, now seen corresponding path program 2 times [2024-06-27 17:31:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:31:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799987052] [2024-06-27 17:31:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:31:58,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:31:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:31:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:58,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:31:58,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799987052] [2024-06-27 17:31:58,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799987052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:31:58,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976823308] [2024-06-27 17:31:58,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:31:58,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:31:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:31:58,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:31:58,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:31:58,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:31:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:31:58,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:31:58,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:31:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:58,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:31:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:31:58,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976823308] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:31:58,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:31:58,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:31:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422286177] [2024-06-27 17:31:58,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:31:58,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:31:58,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:31:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:31:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:31:58,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2024-06-27 17:31:58,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 330 flow. Second operand has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:31:58,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:31:58,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2024-06-27 17:31:58,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:02,347 INFO L124 PetriNetUnfolderBase]: 29293/57087 cut-off events. [2024-06-27 17:32:02,347 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-06-27 17:32:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99099 conditions, 57087 events. 29293/57087 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 578938 event pairs, 25003 based on Foata normal form. 6/50099 useless extension candidates. Maximal degree in co-relation 99040. Up to 41865 conditions per place. [2024-06-27 17:32:02,657 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 81 selfloop transitions, 11 changer transitions 0/145 dead transitions. [2024-06-27 17:32:02,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 145 transitions, 550 flow [2024-06-27 17:32:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:32:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:32:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 734 transitions. [2024-06-27 17:32:02,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34171322160148976 [2024-06-27 17:32:02,661 INFO L175 Difference]: Start difference. First operand has 140 places, 139 transitions, 330 flow. Second operand 12 states and 734 transitions. [2024-06-27 17:32:02,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 145 transitions, 550 flow [2024-06-27 17:32:02,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 145 transitions, 536 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:02,664 INFO L231 Difference]: Finished difference. Result has 156 places, 145 transitions, 400 flow [2024-06-27 17:32:02,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=400, PETRI_PLACES=156, PETRI_TRANSITIONS=145} [2024-06-27 17:32:02,665 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, 26 predicate places. [2024-06-27 17:32:02,666 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 145 transitions, 400 flow [2024-06-27 17:32:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:32:02,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:02,666 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 17:32:02,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 17:32:02,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:32:02,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-06-27 17:32:02,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1751555684, now seen corresponding path program 3 times [2024-06-27 17:32:02,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:02,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883355574] [2024-06-27 17:32:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:32:02,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:32:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:32:02,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:32:02,909 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:32:02,909 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-06-27 17:32:02,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-06-27 17:32:02,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-06-27 17:32:02,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-06-27 17:32:02,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-06-27 17:32:02,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-06-27 17:32:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:32:02,910 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 17:32:02,911 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:32:02,911 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 17:32:02,940 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 17:32:02,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 224 transitions, 475 flow [2024-06-27 17:32:02,971 INFO L124 PetriNetUnfolderBase]: 148/498 cut-off events. [2024-06-27 17:32:02,972 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:32:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 498 events. 148/498 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2867 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2024-06-27 17:32:02,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 224 transitions, 475 flow [2024-06-27 17:32:02,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 224 transitions, 475 flow [2024-06-27 17:32:02,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:32:02,981 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;@64f6af65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:32:02,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:32:02,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:32:02,987 INFO L124 PetriNetUnfolderBase]: 16/96 cut-off events. [2024-06-27 17:32:02,987 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:32:02,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:02,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:32:02,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:32:02,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1981694445, now seen corresponding path program 1 times [2024-06-27 17:32:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:02,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837766740] [2024-06-27 17:32:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:32:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837766740] [2024-06-27 17:32:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837766740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:03,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:32:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672930678] [2024-06-27 17:32:03,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:32:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:32:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:32:03,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 224 [2024-06-27 17:32:03,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 224 transitions, 475 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:32:03,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:03,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 224 [2024-06-27 17:32:03,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand