./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.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_24-sound_lock_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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:20:33,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:20:33,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:20:33,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:20:33,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:20:33,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:20:33,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:20:33,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:20:33,622 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:20:33,622 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:20:33,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:20:33,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:20:33,623 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:20:33,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:20:33,623 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:20:33,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:20:33,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:20:33,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:20:33,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:20:33,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:20:33,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:20:33,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:20:33,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:20:33,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:20:33,630 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:20:33,630 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:20:33,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:20:33,630 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:20:33,631 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:20:33,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:20:33,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:20:33,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:20:33,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:20:33,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:20:33,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:20:33,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:20:33,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2024-11-16 19:20:33,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:20:33,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:20:33,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:20:33,849 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:20:33,850 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:20:33,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2024-11-16 19:20:35,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:20:35,261 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:20:35,261 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2024-11-16 19:20:35,272 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f85290c5/7a68ce36aa4245669f35be7a2868839b/FLAG7c71108ce [2024-11-16 19:20:35,631 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f85290c5/7a68ce36aa4245669f35be7a2868839b [2024-11-16 19:20:35,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:20:35,634 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:20:35,635 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:20:35,635 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:20:35,639 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:20:35,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:20:35" (1/1) ... [2024-11-16 19:20:35,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b236d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:35, skipping insertion in model container [2024-11-16 19:20:35,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:20:35" (1/1) ... [2024-11-16 19:20:35,677 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:20:35,921 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_24-sound_lock_racing.i[30176,30189] [2024-11-16 19:20:35,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:20:35,989 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:20:36,056 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_24-sound_lock_racing.i[30176,30189] [2024-11-16 19:20:36,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:20:36,104 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:20:36,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36 WrapperNode [2024-11-16 19:20:36,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:20:36,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:20:36,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:20:36,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:20:36,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,145 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2024-11-16 19:20:36,145 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:20:36,146 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:20:36,146 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:20:36,146 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:20:36,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,182 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 5, 10, 2]. 53 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-11-16 19:20:36,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,191 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:20:36,199 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:20:36,199 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:20:36,200 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:20:36,200 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (1/1) ... [2024-11-16 19:20:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:20:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:20:36,231 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 19:20:36,234 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 19:20:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:20:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:20:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:20:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:20:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:20:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:20:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:20:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:20:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:20:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:20:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 19:20:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-16 19:20:36,273 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-16 19:20:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 19:20:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:20:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:20:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:20:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:20:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:20:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:20:36,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:20:36,278 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 19:20:36,406 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:20:36,408 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:20:36,542 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L710: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-16 19:20:36,543 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L710-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-16 19:20:36,576 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:20:36,576 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:20:36,699 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:20:36,700 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:20:36,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:20:36 BoogieIcfgContainer [2024-11-16 19:20:36,700 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:20:36,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:20:36,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:20:36,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:20:36,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:20:35" (1/3) ... [2024-11-16 19:20:36,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a9738d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:20:36, skipping insertion in model container [2024-11-16 19:20:36,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:36" (2/3) ... [2024-11-16 19:20:36,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a9738d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:20:36, skipping insertion in model container [2024-11-16 19:20:36,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:20:36" (3/3) ... [2024-11-16 19:20:36,707 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2024-11-16 19:20:36,721 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:20:36,721 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:20:36,721 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:20:36,753 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-16 19:20:36,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 58 transitions, 123 flow [2024-11-16 19:20:36,821 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-11-16 19:20:36,821 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:36,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 17/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 266 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2024-11-16 19:20:36,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 58 transitions, 123 flow [2024-11-16 19:20:36,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 56 transitions, 116 flow [2024-11-16 19:20:36,838 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:36,844 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;@6e57ad23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:36,845 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:36,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:36,853 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2024-11-16 19:20:36,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:20:36,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:36,854 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:20:36,855 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:36,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2135897214, now seen corresponding path program 1 times [2024-11-16 19:20:36,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:36,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922495811] [2024-11-16 19:20:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:36,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:36,986 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:37,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:37,040 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:37,041 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:37,043 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:37,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:20:37,044 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:20:37,047 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:37,047 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:20:37,069 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:20:37,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 85 transitions, 186 flow [2024-11-16 19:20:37,107 INFO L124 PetriNetUnfolderBase]: 31/149 cut-off events. [2024-11-16 19:20:37,108 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-16 19:20:37,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 149 events. 31/149 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 569 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2024-11-16 19:20:37,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 85 transitions, 186 flow [2024-11-16 19:20:37,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 85 transitions, 186 flow [2024-11-16 19:20:37,114 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:37,116 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;@6e57ad23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:37,116 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:37,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:37,128 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-11-16 19:20:37,129 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:37,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:37,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:37,129 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:37,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1009697945, now seen corresponding path program 1 times [2024-11-16 19:20:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:37,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380876450] [2024-11-16 19:20:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:37,190 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 19:20:37,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380876450] [2024-11-16 19:20:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380876450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:37,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:37,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688793675] [2024-11-16 19:20:37,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:37,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:37,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:37,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 85 [2024-11-16 19:20:37,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 85 transitions, 186 flow. Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 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 19:20:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:37,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 85 [2024-11-16 19:20:37,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:37,785 INFO L124 PetriNetUnfolderBase]: 2415/5088 cut-off events. [2024-11-16 19:20:37,786 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-16 19:20:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9054 conditions, 5088 events. 2415/5088 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 39031 event pairs, 2403 based on Foata normal form. 2156/7085 useless extension candidates. Maximal degree in co-relation 6596. Up to 3909 conditions per place. [2024-11-16 19:20:37,803 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 27 selfloop transitions, 0 changer transitions 13/68 dead transitions. [2024-11-16 19:20:37,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 224 flow [2024-11-16 19:20:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 117 transitions. [2024-11-16 19:20:37,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6882352941176471 [2024-11-16 19:20:37,813 INFO L175 Difference]: Start difference. First operand has 71 places, 85 transitions, 186 flow. Second operand 2 states and 117 transitions. [2024-11-16 19:20:37,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 224 flow [2024-11-16 19:20:37,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:37,818 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 120 flow [2024-11-16 19:20:37,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-11-16 19:20:37,821 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-11-16 19:20:37,822 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 120 flow [2024-11-16 19:20:37,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 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 19:20:37,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:37,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:37,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:20:37,823 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:37,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -246205615, now seen corresponding path program 1 times [2024-11-16 19:20:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288064077] [2024-11-16 19:20:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:37,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:37,904 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 19:20:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:37,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288064077] [2024-11-16 19:20:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288064077] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:37,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:37,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566157002] [2024-11-16 19:20:37,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:37,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:37,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:37,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 85 [2024-11-16 19:20:37,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 19:20:37,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:37,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 85 [2024-11-16 19:20:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:38,188 INFO L124 PetriNetUnfolderBase]: 1602/3415 cut-off events. [2024-11-16 19:20:38,189 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-16 19:20:38,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 3415 events. 1602/3415 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 25145 event pairs, 720 based on Foata normal form. 0/3249 useless extension candidates. Maximal degree in co-relation 6041. Up to 2583 conditions per place. [2024-11-16 19:20:38,202 INFO L140 encePairwiseOnDemand]: 82/85 looper letters, 38 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-11-16 19:20:38,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 222 flow [2024-11-16 19:20:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-11-16 19:20:38,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5137254901960784 [2024-11-16 19:20:38,206 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 120 flow. Second operand 3 states and 131 transitions. [2024-11-16 19:20:38,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 222 flow [2024-11-16 19:20:38,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:38,209 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 132 flow [2024-11-16 19:20:38,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-11-16 19:20:38,212 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2024-11-16 19:20:38,212 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 132 flow [2024-11-16 19:20:38,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 19:20:38,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:38,213 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:20:38,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:20:38,213 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:38,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1723963724, now seen corresponding path program 1 times [2024-11-16 19:20:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:38,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921045788] [2024-11-16 19:20:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:38,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:38,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:38,246 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:38,246 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:38,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:38,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:20:38,246 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:20:38,247 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:38,247 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:20:38,261 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:20:38,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 112 transitions, 251 flow [2024-11-16 19:20:38,278 INFO L124 PetriNetUnfolderBase]: 50/230 cut-off events. [2024-11-16 19:20:38,279 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-16 19:20:38,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 230 events. 50/230 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 932 event pairs, 1 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 160. Up to 16 conditions per place. [2024-11-16 19:20:38,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 112 transitions, 251 flow [2024-11-16 19:20:38,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 112 transitions, 251 flow [2024-11-16 19:20:38,282 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:38,283 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;@6e57ad23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:38,283 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:38,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:38,286 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-11-16 19:20:38,287 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:38,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:38,287 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:38,287 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:38,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash -560037529, now seen corresponding path program 1 times [2024-11-16 19:20:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479768408] [2024-11-16 19:20:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:38,309 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 19:20:38,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479768408] [2024-11-16 19:20:38,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479768408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:38,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:38,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:38,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202089003] [2024-11-16 19:20:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:38,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:38,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 112 [2024-11-16 19:20:38,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 251 flow. Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 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 19:20:38,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:38,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 112 [2024-11-16 19:20:38,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:42,961 INFO L124 PetriNetUnfolderBase]: 38402/65284 cut-off events. [2024-11-16 19:20:42,961 INFO L125 PetriNetUnfolderBase]: For 1182/1182 co-relation queries the response was YES. [2024-11-16 19:20:43,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119919 conditions, 65284 events. 38402/65284 cut-off events. For 1182/1182 co-relation queries the response was YES. Maximal size of possible extension queue 1724. Compared 597261 event pairs, 38269 based on Foata normal form. 30800/94167 useless extension candidates. Maximal degree in co-relation 60928. Up to 53836 conditions per place. [2024-11-16 19:20:43,224 INFO L140 encePairwiseOnDemand]: 89/112 looper letters, 37 selfloop transitions, 0 changer transitions 14/89 dead transitions. [2024-11-16 19:20:43,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 299 flow [2024-11-16 19:20:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 154 transitions. [2024-11-16 19:20:43,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-11-16 19:20:43,226 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 251 flow. Second operand 2 states and 154 transitions. [2024-11-16 19:20:43,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 299 flow [2024-11-16 19:20:43,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:43,232 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 168 flow [2024-11-16 19:20:43,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=168, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2024-11-16 19:20:43,233 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-11-16 19:20:43,234 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 168 flow [2024-11-16 19:20:43,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 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 19:20:43,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:43,234 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:43,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:20:43,235 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:43,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash 808365505, now seen corresponding path program 1 times [2024-11-16 19:20:43,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:43,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154420842] [2024-11-16 19:20:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:43,264 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 19:20:43,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:43,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154420842] [2024-11-16 19:20:43,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154420842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:43,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:43,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:43,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247533321] [2024-11-16 19:20:43,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:43,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:43,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:43,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:43,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:43,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 112 [2024-11-16 19:20:43,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:20:43,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:43,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 112 [2024-11-16 19:20:43,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:45,770 INFO L124 PetriNetUnfolderBase]: 25002/42706 cut-off events. [2024-11-16 19:20:45,770 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2024-11-16 19:20:45,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78138 conditions, 42706 events. 25002/42706 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 373825 event pairs, 23996 based on Foata normal form. 0/40449 useless extension candidates. Maximal degree in co-relation 78132. Up to 34983 conditions per place. [2024-11-16 19:20:45,998 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 48 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-11-16 19:20:45,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 290 flow [2024-11-16 19:20:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2024-11-16 19:20:46,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-16 19:20:46,000 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 168 flow. Second operand 3 states and 171 transitions. [2024-11-16 19:20:46,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 290 flow [2024-11-16 19:20:46,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 288 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:46,003 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 178 flow [2024-11-16 19:20:46,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-11-16 19:20:46,004 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -7 predicate places. [2024-11-16 19:20:46,004 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 178 flow [2024-11-16 19:20:46,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:20:46,004 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:46,004 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:46,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:20:46,005 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:46,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash -753717083, now seen corresponding path program 1 times [2024-11-16 19:20:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:46,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118993144] [2024-11-16 19:20:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:46,068 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 19:20:46,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118993144] [2024-11-16 19:20:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118993144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:20:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457451787] [2024-11-16 19:20:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:46,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:20:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:20:46,072 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 19:20:46,072 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 19:20:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:46,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 19:20:46,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:20:46,189 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 19:20:46,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:20:46,215 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 19:20:46,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457451787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:20:46,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:20:46,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-16 19:20:46,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689427811] [2024-11-16 19:20:46,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:20:46,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:20:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:46,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:20:46,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:20:46,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 112 [2024-11-16 19:20:46,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 42.714285714285715) internal successors, (299), 7 states have internal predecessors, (299), 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 19:20:46,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:46,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 112 [2024-11-16 19:20:46,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:47,232 INFO L124 PetriNetUnfolderBase]: 7668/14101 cut-off events. [2024-11-16 19:20:47,232 INFO L125 PetriNetUnfolderBase]: For 5429/5429 co-relation queries the response was YES. [2024-11-16 19:20:47,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26562 conditions, 14101 events. 7668/14101 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 116508 event pairs, 880 based on Foata normal form. 1110/14748 useless extension candidates. Maximal degree in co-relation 26554. Up to 7400 conditions per place. [2024-11-16 19:20:47,285 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 88 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-11-16 19:20:47,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 458 flow [2024-11-16 19:20:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:20:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:20:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 335 transitions. [2024-11-16 19:20:47,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49851190476190477 [2024-11-16 19:20:47,287 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 178 flow. Second operand 6 states and 335 transitions. [2024-11-16 19:20:47,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 458 flow [2024-11-16 19:20:47,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:20:47,291 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 166 flow [2024-11-16 19:20:47,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2024-11-16 19:20:47,291 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -13 predicate places. [2024-11-16 19:20:47,292 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 166 flow [2024-11-16 19:20:47,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.714285714285715) internal successors, (299), 7 states have internal predecessors, (299), 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 19:20:47,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:47,292 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:20:47,308 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 19:20:47,493 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 19:20:47,493 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:47,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2114147, now seen corresponding path program 1 times [2024-11-16 19:20:47,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518422694] [2024-11-16 19:20:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:47,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:47,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:47,526 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:47,526 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:47,526 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:47,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:20:47,526 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:20:47,527 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:47,527 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:20:47,547 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:20:47,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 139 transitions, 318 flow [2024-11-16 19:20:47,568 INFO L124 PetriNetUnfolderBase]: 81/347 cut-off events. [2024-11-16 19:20:47,568 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-16 19:20:47,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 347 events. 81/347 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1505 event pairs, 6 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 254. Up to 32 conditions per place. [2024-11-16 19:20:47,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 139 transitions, 318 flow [2024-11-16 19:20:47,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 139 transitions, 318 flow [2024-11-16 19:20:47,573 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:47,574 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;@6e57ad23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:47,574 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:47,577 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:47,577 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-11-16 19:20:47,577 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:47,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:47,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:47,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:47,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash 419850311, now seen corresponding path program 1 times [2024-11-16 19:20:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305943068] [2024-11-16 19:20:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:47,592 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 19:20:47,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305943068] [2024-11-16 19:20:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305943068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:47,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:47,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:47,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156046035] [2024-11-16 19:20:47,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:47,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:47,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 139 [2024-11-16 19:20:47,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 318 flow. Second operand has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 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 19:20:47,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:47,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 139 [2024-11-16 19:20:47,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand