./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:19:51,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:19:51,361 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:19:51,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:19:51,368 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:19:51,395 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:19:51,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:19:51,396 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:19:51,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:19:51,397 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:19:51,397 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:19:51,398 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:19:51,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:19:51,399 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:19:51,399 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:19:51,400 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:19:51,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:19:51,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:19:51,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:19:51,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:19:51,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:19:51,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:19:51,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:19:51,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:19:51,405 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:19:51,405 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:19:51,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:19:51,406 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:19:51,406 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:19:51,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:19:51,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:19:51,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:19:51,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:19:51,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:19:51,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:19:51,408 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:19:51,408 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:19:51,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:19:51,409 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:19:51,409 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:19:51,410 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:19:51,411 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:19:51,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2024-11-16 19:19:51,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:19:51,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:19:51,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:19:51,688 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:19:51,688 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:19:51,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2024-11-16 19:19:53,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:19:53,415 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:19:53,416 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2024-11-16 19:19:53,436 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45631864c/c9bc402650024b8e91cc6976ec82ac26/FLAG3e2cbaf9d [2024-11-16 19:19:53,728 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45631864c/c9bc402650024b8e91cc6976ec82ac26 [2024-11-16 19:19:53,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:19:53,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:19:53,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:19:53,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:19:53,737 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:19:53,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:19:53" (1/1) ... [2024-11-16 19:19:53,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63976b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:53, skipping insertion in model container [2024-11-16 19:19:53,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:19:53" (1/1) ... [2024-11-16 19:19:53,784 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:19:54,146 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2024-11-16 19:19:54,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:19:54,191 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:19:54,233 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2024-11-16 19:19:54,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:19:54,298 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:19:54,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54 WrapperNode [2024-11-16 19:19:54,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:19:54,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:19:54,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:19:54,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:19:54,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,326 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,351 INFO L138 Inliner]: procedures = 173, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 113 [2024-11-16 19:19:54,353 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:19:54,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:19:54,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:19:54,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:19:54,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,370 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,398 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]. [2024-11-16 19:19:54,400 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,406 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:19:54,416 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:19:54,417 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:19:54,417 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:19:54,418 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (1/1) ... [2024-11-16 19:19:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:19:54,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:19:54,460 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) [2024-11-16 19:19:54,462 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 [2024-11-16 19:19:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:19:54,511 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-16 19:19:54,512 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:19:54,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:19:54,513 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:19:54,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:19:54,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:19:54,516 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:19:54,642 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:19:54,644 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:19:54,809 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L712: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-16 19:19:54,810 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L712-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-16 19:19:54,851 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:19:54,852 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:19:54,995 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:19:54,997 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:19:54,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:19:54 BoogieIcfgContainer [2024-11-16 19:19:54,998 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:19:55,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:19:55,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:19:55,005 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:19:55,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:19:53" (1/3) ... [2024-11-16 19:19:55,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545190f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:19:55, skipping insertion in model container [2024-11-16 19:19:55,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:19:54" (2/3) ... [2024-11-16 19:19:55,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545190f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:19:55, skipping insertion in model container [2024-11-16 19:19:55,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:19:54" (3/3) ... [2024-11-16 19:19:55,008 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2024-11-16 19:19:55,023 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:19:55,023 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:19:55,023 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:19:55,069 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-16 19:19:55,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 60 transitions, 127 flow [2024-11-16 19:19:55,156 INFO L124 PetriNetUnfolderBase]: 17/88 cut-off events. [2024-11-16 19:19:55,158 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:19:55,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 88 events. 17/88 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 280 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2024-11-16 19:19:55,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 60 transitions, 127 flow [2024-11-16 19:19:55,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 58 transitions, 120 flow [2024-11-16 19:19:55,174 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:19:55,180 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@1092879a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:19:55,181 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:19:55,189 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:19:55,189 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2024-11-16 19:19:55,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:19:55,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:55,190 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:19:55,190 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:55,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:55,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1063423141, now seen corresponding path program 1 times [2024-11-16 19:19:55,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:55,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40872437] [2024-11-16 19:19:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:55,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:55,351 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:19:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:55,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:19:55,416 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:19:55,417 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:19:55,419 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:19:55,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:19:55,421 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:19:55,428 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:19:55,428 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:19:55,448 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:19:55,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 88 transitions, 192 flow [2024-11-16 19:19:55,491 INFO L124 PetriNetUnfolderBase]: 31/154 cut-off events. [2024-11-16 19:19:55,491 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-16 19:19:55,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 154 events. 31/154 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 591 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2024-11-16 19:19:55,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 88 transitions, 192 flow [2024-11-16 19:19:55,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 88 transitions, 192 flow [2024-11-16 19:19:55,524 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:19:55,530 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@1092879a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:19:55,530 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:19:55,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:19:55,557 INFO L124 PetriNetUnfolderBase]: 6/51 cut-off events. [2024-11-16 19:19:55,557 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:19:55,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:55,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:19:55,558 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:55,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash 225292736, now seen corresponding path program 1 times [2024-11-16 19:19:55,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:55,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054137171] [2024-11-16 19:19:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:19:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:19:55,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:19:55,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054137171] [2024-11-16 19:19:55,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054137171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:19:55,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:19:55,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:19:55,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923737499] [2024-11-16 19:19:55,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:19:55,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:19:55,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:19:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:19:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:19:55,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 88 [2024-11-16 19:19:55,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 192 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2024-11-16 19:19:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:19:55,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 88 [2024-11-16 19:19:55,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:19:56,793 INFO L124 PetriNetUnfolderBase]: 4051/8631 cut-off events. [2024-11-16 19:19:56,793 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-16 19:19:56,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15165 conditions, 8631 events. 4051/8631 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 69205 event pairs, 4037 based on Foata normal form. 2992/11413 useless extension candidates. Maximal degree in co-relation 9414. Up to 6467 conditions per place. [2024-11-16 19:19:56,840 INFO L140 encePairwiseOnDemand]: 71/88 looper letters, 33 selfloop transitions, 0 changer transitions 14/71 dead transitions. [2024-11-16 19:19:56,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 242 flow [2024-11-16 19:19:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:19:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:19:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 117 transitions. [2024-11-16 19:19:56,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6647727272727273 [2024-11-16 19:19:56,855 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 192 flow. Second operand 2 states and 117 transitions. [2024-11-16 19:19:56,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 242 flow [2024-11-16 19:19:56,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:19:56,867 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 124 flow [2024-11-16 19:19:56,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2024-11-16 19:19:56,874 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2024-11-16 19:19:56,874 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 124 flow [2024-11-16 19:19:56,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2024-11-16 19:19:56,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:56,875 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:19:56,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:19:56,876 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:56,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash 21418475, now seen corresponding path program 1 times [2024-11-16 19:19:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:56,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421834653] [2024-11-16 19:19:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:56,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:19:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:19:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:19:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421834653] [2024-11-16 19:19:57,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421834653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:19:57,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:19:57,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:19:57,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429843388] [2024-11-16 19:19:57,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:19:57,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:19:57,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:19:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:19:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:19:57,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2024-11-16 19:19:57,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2024-11-16 19:19:57,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:19:57,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2024-11-16 19:19:57,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:19:57,594 INFO L124 PetriNetUnfolderBase]: 2607/5562 cut-off events. [2024-11-16 19:19:57,595 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-16 19:19:57,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 5562 events. 2607/5562 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 41141 event pairs, 2212 based on Foata normal form. 0/5314 useless extension candidates. Maximal degree in co-relation 9769. Up to 4156 conditions per place. [2024-11-16 19:19:57,630 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 45 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-11-16 19:19:57,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 244 flow [2024-11-16 19:19:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:19:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:19:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2024-11-16 19:19:57,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-16 19:19:57,635 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 124 flow. Second operand 3 states and 132 transitions. [2024-11-16 19:19:57,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 244 flow [2024-11-16 19:19:57,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:19:57,638 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 136 flow [2024-11-16 19:19:57,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-11-16 19:19:57,639 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-16 19:19:57,640 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 136 flow [2024-11-16 19:19:57,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2024-11-16 19:19:57,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:57,640 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:19:57,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:19:57,641 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:57,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -657293852, now seen corresponding path program 1 times [2024-11-16 19:19:57,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:57,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20999581] [2024-11-16 19:19:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:57,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:19:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:19:57,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:19:57,692 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:19:57,692 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:19:57,693 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:19:57,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:19:57,693 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:19:57,694 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:19:57,694 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:19:57,716 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:19:57,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 116 transitions, 259 flow [2024-11-16 19:19:57,739 INFO L124 PetriNetUnfolderBase]: 50/237 cut-off events. [2024-11-16 19:19:57,740 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-16 19:19:57,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 237 events. 50/237 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 979 event pairs, 1 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 165. Up to 16 conditions per place. [2024-11-16 19:19:57,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 116 transitions, 259 flow [2024-11-16 19:19:57,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 116 transitions, 259 flow [2024-11-16 19:19:57,746 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:19:57,748 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@1092879a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:19:57,749 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:19:57,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:19:57,753 INFO L124 PetriNetUnfolderBase]: 6/51 cut-off events. [2024-11-16 19:19:57,753 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:19:57,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:19:57,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:19:57,753 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:19:57,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:19:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash -996296128, now seen corresponding path program 1 times [2024-11-16 19:19:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:19:57,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082928453] [2024-11-16 19:19:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:19:57,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:19:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:19:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:19:57,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:19:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082928453] [2024-11-16 19:19:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082928453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:19:57,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:19:57,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:19:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408064679] [2024-11-16 19:19:57,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:19:57,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:19:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:19:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:19:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:19:57,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 116 [2024-11-16 19:19:57,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 259 flow. Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2024-11-16 19:19:57,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:19:57,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 116 [2024-11-16 19:19:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:08,438 INFO L124 PetriNetUnfolderBase]: 76348/131837 cut-off events. [2024-11-16 19:20:08,438 INFO L125 PetriNetUnfolderBase]: For 1616/1616 co-relation queries the response was YES. [2024-11-16 19:20:08,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238990 conditions, 131837 events. 76348/131837 cut-off events. For 1616/1616 co-relation queries the response was YES. Maximal size of possible extension queue 2956. Compared 1282634 event pairs, 76165 based on Foata normal form. 50375/178965 useless extension candidates. Maximal degree in co-relation 85896. Up to 106028 conditions per place. [2024-11-16 19:20:09,065 INFO L140 encePairwiseOnDemand]: 93/116 looper letters, 45 selfloop transitions, 0 changer transitions 15/93 dead transitions. [2024-11-16 19:20:09,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 323 flow [2024-11-16 19:20:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 154 transitions. [2024-11-16 19:20:09,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-11-16 19:20:09,069 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 259 flow. Second operand 2 states and 154 transitions. [2024-11-16 19:20:09,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 323 flow [2024-11-16 19:20:09,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:09,075 INFO L231 Difference]: Finished difference. Result has 98 places, 78 transitions, 174 flow [2024-11-16 19:20:09,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=174, PETRI_PLACES=98, PETRI_TRANSITIONS=78} [2024-11-16 19:20:09,076 INFO L277 CegarLoopForPetriNet]: 97 programPoint places, 1 predicate places. [2024-11-16 19:20:09,076 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 78 transitions, 174 flow [2024-11-16 19:20:09,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2024-11-16 19:20:09,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:09,077 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:09,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:20:09,078 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:09,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash 806869471, now seen corresponding path program 1 times [2024-11-16 19:20:09,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:09,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230394042] [2024-11-16 19:20:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:09,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:09,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230394042] [2024-11-16 19:20:09,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230394042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:09,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:09,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:09,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188574449] [2024-11-16 19:20:09,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:09,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:09,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:09,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 116 [2024-11-16 19:20:09,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 78 transitions, 174 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) [2024-11-16 19:20:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 116 [2024-11-16 19:20:09,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:14,421 INFO L124 PetriNetUnfolderBase]: 48543/84111 cut-off events. [2024-11-16 19:20:14,421 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-11-16 19:20:14,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152116 conditions, 84111 events. 48543/84111 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 783216 event pairs, 31284 based on Foata normal form. 0/81081 useless extension candidates. Maximal degree in co-relation 152110. Up to 67372 conditions per place. [2024-11-16 19:20:14,835 INFO L140 encePairwiseOnDemand]: 113/116 looper letters, 57 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2024-11-16 19:20:14,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 318 flow [2024-11-16 19:20:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2024-11-16 19:20:14,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49137931034482757 [2024-11-16 19:20:14,840 INFO L175 Difference]: Start difference. First operand has 98 places, 78 transitions, 174 flow. Second operand 3 states and 171 transitions. [2024-11-16 19:20:14,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 318 flow [2024-11-16 19:20:14,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 316 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:14,844 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 184 flow [2024-11-16 19:20:14,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2024-11-16 19:20:14,846 INFO L277 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-11-16 19:20:14,846 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 184 flow [2024-11-16 19:20:14,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-16 19:20:14,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:14,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:14,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:20:14,847 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:14,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 142386225, now seen corresponding path program 1 times [2024-11-16 19:20:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006185919] [2024-11-16 19:20:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:14,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006185919] [2024-11-16 19:20:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006185919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:20:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672788046] [2024-11-16 19:20:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:14,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:20:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:20:14,933 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) [2024-11-16 19:20:14,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:20:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:15,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 19:20:15,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:20:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:15,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:20:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:15,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672788046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:20:15,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:20:15,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-16 19:20:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597488095] [2024-11-16 19:20:15,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:20:15,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:20:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:20:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:20:15,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 116 [2024-11-16 19:20:15,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 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) [2024-11-16 19:20:15,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:15,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 116 [2024-11-16 19:20:15,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:17,098 INFO L124 PetriNetUnfolderBase]: 13354/24033 cut-off events. [2024-11-16 19:20:17,098 INFO L125 PetriNetUnfolderBase]: For 5795/5795 co-relation queries the response was YES. [2024-11-16 19:20:17,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45416 conditions, 24033 events. 13354/24033 cut-off events. For 5795/5795 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 197841 event pairs, 2465 based on Foata normal form. 1884/25684 useless extension candidates. Maximal degree in co-relation 45408. Up to 12960 conditions per place. [2024-11-16 19:20:17,226 INFO L140 encePairwiseOnDemand]: 113/116 looper letters, 106 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2024-11-16 19:20:17,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 139 transitions, 524 flow [2024-11-16 19:20:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:20:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:20:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 335 transitions. [2024-11-16 19:20:17,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4813218390804598 [2024-11-16 19:20:17,229 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 184 flow. Second operand 6 states and 335 transitions. [2024-11-16 19:20:17,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 139 transitions, 524 flow [2024-11-16 19:20:17,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:20:17,236 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 172 flow [2024-11-16 19:20:17,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2024-11-16 19:20:17,241 INFO L277 CegarLoopForPetriNet]: 97 programPoint places, -14 predicate places. [2024-11-16 19:20:17,241 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 172 flow [2024-11-16 19:20:17,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 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) [2024-11-16 19:20:17,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:17,242 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:20:17,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:20:17,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:20:17,447 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:17,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:17,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1561011362, now seen corresponding path program 1 times [2024-11-16 19:20:17,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:17,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145466667] [2024-11-16 19:20:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:17,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:17,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:17,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:17,497 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:17,498 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:17,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:17,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:20:17,500 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:20:17,501 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:17,501 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:20:17,540 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:20:17,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 144 transitions, 328 flow [2024-11-16 19:20:17,586 INFO L124 PetriNetUnfolderBase]: 81/356 cut-off events. [2024-11-16 19:20:17,586 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-16 19:20:17,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 356 events. 81/356 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1589 event pairs, 6 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 261. Up to 32 conditions per place. [2024-11-16 19:20:17,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 144 transitions, 328 flow [2024-11-16 19:20:17,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 144 transitions, 328 flow [2024-11-16 19:20:17,595 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:17,596 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@1092879a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:17,596 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:17,601 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:17,603 INFO L124 PetriNetUnfolderBase]: 6/51 cut-off events. [2024-11-16 19:20:17,603 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:17,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:17,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:17,603 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:17,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1031728064, now seen corresponding path program 1 times [2024-11-16 19:20:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:17,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152177852] [2024-11-16 19:20:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:17,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152177852] [2024-11-16 19:20:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152177852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:17,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:17,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284346930] [2024-11-16 19:20:17,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:17,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:17,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:17,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 144 [2024-11-16 19:20:17,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 144 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2024-11-16 19:20:17,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:17,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 144 [2024-11-16 19:20:17,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand