./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_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 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:25:25,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:25:25,150 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:25:25,159 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:25:25,159 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:25:25,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:25:25,187 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:25:25,187 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:25:25,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:25:25,192 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:25:25,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:25:25,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:25:25,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:25:25,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:25:25,195 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:25:25,195 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:25:25,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:25:25,196 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:25:25,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:25:25,196 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:25:25,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:25:25,197 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:25:25,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:25:25,197 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:25:25,197 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:25:25,197 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:25:25,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:25:25,198 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:25:25,198 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:25:25,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:25:25,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:25:25,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:25:25,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:25:25,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:25:25,200 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:25:25,200 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:25:25,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:25:25,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:25:25,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:25:25,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:25:25,201 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:25:25,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:25:25,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:25:25,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2024-06-27 16:25:25,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:25:25,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:25:25,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:25:25,447 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:25:25,447 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:25:25,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-06-27 16:25:26,641 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:25:26,854 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:25:26,855 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2024-06-27 16:25:26,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fdd26d0/210c2c36b66e4cb4911333207c1b178f/FLAG8601feb13 [2024-06-27 16:25:26,882 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fdd26d0/210c2c36b66e4cb4911333207c1b178f [2024-06-27 16:25:26,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:25:26,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:25:26,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:25:26,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:25:26,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:25:26,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:25:26" (1/1) ... [2024-06-27 16:25:26,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a194e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:26, skipping insertion in model container [2024-06-27 16:25:26,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:25:26" (1/1) ... [2024-06-27 16:25:26,930 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:25:27,180 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2024-06-27 16:25:27,215 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:25:27,227 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:25:27,267 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2024-06-27 16:25:27,294 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:25:27,373 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:25:27,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27 WrapperNode [2024-06-27 16:25:27,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:25:27,375 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:25:27,375 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:25:27,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:25:27,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,429 INFO L138 Inliner]: procedures = 172, calls = 60, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2024-06-27 16:25:27,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:25:27,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:25:27,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:25:27,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:25:27,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,442 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,463 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-06-27 16:25:27,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,464 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:25:27,492 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:25:27,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:25:27,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:25:27,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (1/1) ... [2024-06-27 16:25:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:25:27,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:27,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:25:27,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:25:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:25:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:25:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:25:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 16:25:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-06-27 16:25:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:25:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:25:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 16:25:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 16:25:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-06-27 16:25:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 16:25:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:25:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 16:25:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-06-27 16:25:27,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-06-27 16:25:27,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 16:25:27,575 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-06-27 16:25:27,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:25:27,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 16:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-06-27 16:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 16:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:25:27,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:25:27,580 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:25:27,723 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:25:27,725 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:25:27,994 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:25:27,994 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:25:28,156 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:25:28,156 INFO L320 CfgBuilder]: Removed 23 assume(true) statements. [2024-06-27 16:25:28,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:25:28 BoogieIcfgContainer [2024-06-27 16:25:28,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:25:28,158 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:25:28,158 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:25:28,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:25:28,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:25:26" (1/3) ... [2024-06-27 16:25:28,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607cc937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:25:28, skipping insertion in model container [2024-06-27 16:25:28,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:27" (2/3) ... [2024-06-27 16:25:28,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607cc937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:25:28, skipping insertion in model container [2024-06-27 16:25:28,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:25:28" (3/3) ... [2024-06-27 16:25:28,163 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2024-06-27 16:25:28,174 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:25:28,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:25:28,182 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 16:25:28,182 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:25:28,227 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-06-27 16:25:28,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 117 transitions, 241 flow [2024-06-27 16:25:28,326 INFO L124 PetriNetUnfolderBase]: 41/183 cut-off events. [2024-06-27 16:25:28,330 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 16:25:28,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 183 events. 41/183 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 838 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2024-06-27 16:25:28,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 117 transitions, 241 flow [2024-06-27 16:25:28,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 115 transitions, 234 flow [2024-06-27 16:25:28,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:28,355 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12ea9ffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:28,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:25:28,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:28,360 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2024-06-27 16:25:28,360 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:28,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:28,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 16:25:28,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:28,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 406209066, now seen corresponding path program 1 times [2024-06-27 16:25:28,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:28,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902656142] [2024-06-27 16:25:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:28,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:25:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:28,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:25:28,580 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:25:28,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:25:28,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:25:28,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:25:28,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:25:28,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:25:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:25:28,586 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:25:28,592 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:25:28,593 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:25:28,631 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:25:28,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 164 transitions, 344 flow [2024-06-27 16:25:28,735 INFO L124 PetriNetUnfolderBase]: 69/303 cut-off events. [2024-06-27 16:25:28,735 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 16:25:28,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 303 events. 69/303 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1602 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 187. Up to 9 conditions per place. [2024-06-27 16:25:28,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 164 transitions, 344 flow [2024-06-27 16:25:28,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 164 transitions, 344 flow [2024-06-27 16:25:28,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:28,748 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12ea9ffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:28,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:25:28,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:28,756 INFO L124 PetriNetUnfolderBase]: 2/43 cut-off events. [2024-06-27 16:25:28,757 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:25:28,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:28,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:28,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:28,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:28,758 INFO L85 PathProgramCache]: Analyzing trace with hash 228443897, now seen corresponding path program 1 times [2024-06-27 16:25:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:28,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023139628] [2024-06-27 16:25:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:25:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:28,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023139628] [2024-06-27 16:25:28,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023139628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:28,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515267998] [2024-06-27 16:25:28,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:28,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:28,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 164 [2024-06-27 16:25:28,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 164 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:25:28,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:28,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 164 [2024-06-27 16:25:28,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:32,294 INFO L124 PetriNetUnfolderBase]: 19622/38837 cut-off events. [2024-06-27 16:25:32,295 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-06-27 16:25:32,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69225 conditions, 38837 events. 19622/38837 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 356877 event pairs, 18656 based on Foata normal form. 11718/48325 useless extension candidates. Maximal degree in co-relation 58856. Up to 30271 conditions per place. [2024-06-27 16:25:32,462 INFO L140 encePairwiseOnDemand]: 124/164 looper letters, 78 selfloop transitions, 2 changer transitions 11/146 dead transitions. [2024-06-27 16:25:32,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 146 transitions, 486 flow [2024-06-27 16:25:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:25:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:25:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2024-06-27 16:25:32,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-27 16:25:32,480 INFO L175 Difference]: Start difference. First operand has 129 places, 164 transitions, 344 flow. Second operand 3 states and 310 transitions. [2024-06-27 16:25:32,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 146 transitions, 486 flow [2024-06-27 16:25:32,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 146 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:25:32,491 INFO L231 Difference]: Finished difference. Result has 132 places, 117 transitions, 254 flow [2024-06-27 16:25:32,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=132, PETRI_TRANSITIONS=117} [2024-06-27 16:25:32,497 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 3 predicate places. [2024-06-27 16:25:32,497 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 117 transitions, 254 flow [2024-06-27 16:25:32,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:25:32,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:32,499 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 16:25:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:25:32,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:32,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1803075399, now seen corresponding path program 1 times [2024-06-27 16:25:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:32,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582538184] [2024-06-27 16:25:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:32,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:25:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:32,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:25:32,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:25:32,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:25:32,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:25:32,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:25:32,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:25:32,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:25:32,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:25:32,552 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:25:32,553 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:25:32,553 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:25:32,578 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:25:32,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 211 transitions, 449 flow [2024-06-27 16:25:32,613 INFO L124 PetriNetUnfolderBase]: 100/434 cut-off events. [2024-06-27 16:25:32,613 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 16:25:32,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 434 events. 100/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2472 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 314. Up to 12 conditions per place. [2024-06-27 16:25:32,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 211 transitions, 449 flow [2024-06-27 16:25:32,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 211 transitions, 449 flow [2024-06-27 16:25:32,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:32,621 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12ea9ffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:32,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:25:32,624 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:32,624 INFO L124 PetriNetUnfolderBase]: 2/43 cut-off events. [2024-06-27 16:25:32,624 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:25:32,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:32,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:32,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:32,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1173905287, now seen corresponding path program 1 times [2024-06-27 16:25:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714520253] [2024-06-27 16:25:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:25:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714520253] [2024-06-27 16:25:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714520253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:32,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:32,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:32,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574042964] [2024-06-27 16:25:32,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:32,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:32,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:32,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 211 [2024-06-27 16:25:32,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 211 transitions, 449 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:25:32,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:32,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 211 [2024-06-27 16:25:32,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand