./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:12:24,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:12:24,137 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:12:24,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:12:24,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:12:24,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:12:24,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:12:24,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:12:24,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:12:24,169 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:12:24,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:12:24,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:12:24,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:12:24,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:12:24,172 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:12:24,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:12:24,172 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:12:24,172 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:12:24,172 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:12:24,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:12:24,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:12:24,173 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:12:24,173 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:12:24,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:12:24,174 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:12:24,174 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:12:24,174 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:12:24,174 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:12:24,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:12:24,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:12:24,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:12:24,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:12:24,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:12:24,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:12:24,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:12:24,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:12:24,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:12:24,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:12:24,177 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:12:24,177 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:12:24,177 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:12:24,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:12:24,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:12:24,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f [2024-01-27 15:12:24,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:12:24,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:12:24,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:12:24,435 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:12:24,436 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:12:24,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2024-01-27 15:12:25,541 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:12:25,746 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:12:25,747 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2024-01-27 15:12:25,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c99157e/5eac44aea2ab4d6ab4aacdac01f157b4/FLAG819b511b8 [2024-01-27 15:12:25,811 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c99157e/5eac44aea2ab4d6ab4aacdac01f157b4 [2024-01-27 15:12:25,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:12:25,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:12:25,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:12:25,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:12:25,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:12:25,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:12:25" (1/1) ... [2024-01-27 15:12:25,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2bf72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:25, skipping insertion in model container [2024-01-27 15:12:25,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:12:25" (1/1) ... [2024-01-27 15:12:25,878 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:12:26,176 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2024-01-27 15:12:26,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:12:26,222 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:12:26,256 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2024-01-27 15:12:26,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:12:26,305 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:12:26,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26 WrapperNode [2024-01-27 15:12:26,306 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:12:26,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:12:26,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:12:26,307 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:12:26,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,355 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2024-01-27 15:12:26,361 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:12:26,361 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:12:26,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:12:26,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:12:26,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,376 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,389 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-01-27 15:12:26,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,395 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:12:26,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:12:26,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:12:26,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:12:26,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (1/1) ... [2024-01-27 15:12:26,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:12:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:26,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:12:26,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:12:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:12:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:12:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:12:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:12:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:12:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-01-27 15:12:26,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-01-27 15:12:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:12:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:12:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:12:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:12:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:12:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:12:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:12:26,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:12:26,489 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:12:26,606 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:12:26,608 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:12:26,805 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:12:26,805 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:12:26,927 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:12:26,927 INFO L320 CfgBuilder]: Removed 11 assume(true) statements. [2024-01-27 15:12:26,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:26 BoogieIcfgContainer [2024-01-27 15:12:26,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:12:26,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:12:26,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:12:26,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:12:26,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:12:25" (1/3) ... [2024-01-27 15:12:26,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317fa16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:12:26, skipping insertion in model container [2024-01-27 15:12:26,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:26" (2/3) ... [2024-01-27 15:12:26,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317fa16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:12:26, skipping insertion in model container [2024-01-27 15:12:26,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:26" (3/3) ... [2024-01-27 15:12:26,935 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2024-01-27 15:12:26,941 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:12:26,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:12:26,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:12:26,949 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:12:26,983 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-01-27 15:12:27,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 54 transitions, 115 flow [2024-01-27 15:12:27,071 INFO L124 PetriNetUnfolderBase]: 20/85 cut-off events. [2024-01-27 15:12:27,071 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:12:27,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 20/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 271 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2024-01-27 15:12:27,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 54 transitions, 115 flow [2024-01-27 15:12:27,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 52 transitions, 108 flow [2024-01-27 15:12:27,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:27,100 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;@5bccfff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:27,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:12:27,109 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:27,109 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-01-27 15:12:27,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:12:27,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:27,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 15:12:27,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 15:12:27,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -255682909, now seen corresponding path program 1 times [2024-01-27 15:12:27,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:27,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688523386] [2024-01-27 15:12:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:27,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:27,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:12:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:27,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:12:27,333 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:12:27,334 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-01-27 15:12:27,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-01-27 15:12:27,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-01-27 15:12:27,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:12:27,385 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:12:27,387 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:12:27,387 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:12:27,407 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:12:27,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 73 transitions, 162 flow [2024-01-27 15:12:27,443 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2024-01-27 15:12:27,443 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2024-01-27 15:12:27,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 576 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 9 conditions per place. [2024-01-27 15:12:27,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 73 transitions, 162 flow [2024-01-27 15:12:27,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 73 transitions, 162 flow [2024-01-27 15:12:27,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:27,448 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;@5bccfff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:27,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:12:27,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:27,454 INFO L124 PetriNetUnfolderBase]: 4/48 cut-off events. [2024-01-27 15:12:27,455 INFO L125 PetriNetUnfolderBase]: For 3/4 co-relation queries the response was YES. [2024-01-27 15:12:27,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:27,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 15:12:27,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-01-27 15:12:27,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2065072254, now seen corresponding path program 1 times [2024-01-27 15:12:27,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:27,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081255109] [2024-01-27 15:12:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:27,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:27,473 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:12:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:27,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:12:27,488 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:12:27,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 15:12:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 15:12:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-01-27 15:12:27,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 15:12:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:12:27,489 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:12:27,490 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:12:27,490 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:12:27,512 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:12:27,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 92 transitions, 211 flow [2024-01-27 15:12:27,547 INFO L124 PetriNetUnfolderBase]: 49/210 cut-off events. [2024-01-27 15:12:27,547 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2024-01-27 15:12:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 210 events. 49/210 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 927 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2024-01-27 15:12:27,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 92 transitions, 211 flow [2024-01-27 15:12:27,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 92 transitions, 211 flow [2024-01-27 15:12:27,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:27,557 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;@5bccfff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:27,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:12:27,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:27,563 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-01-27 15:12:27,563 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-01-27 15:12:27,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:27,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:27,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:27,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:27,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1786053456, now seen corresponding path program 1 times [2024-01-27 15:12:27,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:27,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263941926] [2024-01-27 15:12:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:27,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263941926] [2024-01-27 15:12:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263941926] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:27,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:27,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:12:27,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339551116] [2024-01-27 15:12:27,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:27,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:12:27,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:12:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:12:27,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 92 [2024-01-27 15:12:27,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:27,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:27,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 92 [2024-01-27 15:12:27,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:34,109 INFO L124 PetriNetUnfolderBase]: 54674/85793 cut-off events. [2024-01-27 15:12:34,109 INFO L125 PetriNetUnfolderBase]: For 1238/1238 co-relation queries the response was YES. [2024-01-27 15:12:34,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162764 conditions, 85793 events. 54674/85793 cut-off events. For 1238/1238 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 709995 event pairs, 17942 based on Foata normal form. 16640/94297 useless extension candidates. Maximal degree in co-relation 44212. Up to 37812 conditions per place. [2024-01-27 15:12:34,615 INFO L140 encePairwiseOnDemand]: 71/92 looper letters, 145 selfloop transitions, 7 changer transitions 0/179 dead transitions. [2024-01-27 15:12:34,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 722 flow [2024-01-27 15:12:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:12:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:12:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2024-01-27 15:12:34,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7260869565217392 [2024-01-27 15:12:34,636 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 211 flow. Second operand 5 states and 334 transitions. [2024-01-27 15:12:34,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 722 flow [2024-01-27 15:12:34,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 179 transitions, 722 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:12:34,648 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 231 flow [2024-01-27 15:12:34,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-01-27 15:12:34,652 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2024-01-27 15:12:34,652 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 231 flow [2024-01-27 15:12:34,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:34,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:34,653 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 15:12:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:12:34,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:34,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash 797905442, now seen corresponding path program 1 times [2024-01-27 15:12:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:34,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118562052] [2024-01-27 15:12:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:34,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:12:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:12:34,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:12:34,694 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:12:34,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:12:34,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:12:34,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 15:12:34,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:12:34,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:12:34,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:12:34,695 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:12:34,698 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:12:34,699 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:12:34,716 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:12:34,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 111 transitions, 262 flow [2024-01-27 15:12:34,750 INFO L124 PetriNetUnfolderBase]: 73/302 cut-off events. [2024-01-27 15:12:34,750 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2024-01-27 15:12:34,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 302 events. 73/302 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1415 event pairs, 6 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 234. Up to 32 conditions per place. [2024-01-27 15:12:34,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 111 transitions, 262 flow [2024-01-27 15:12:34,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 111 transitions, 262 flow [2024-01-27 15:12:34,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:34,761 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;@5bccfff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:34,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:12:34,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:34,766 INFO L124 PetriNetUnfolderBase]: 7/68 cut-off events. [2024-01-27 15:12:34,766 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2024-01-27 15:12:34,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:34,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:34,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:12:34,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -446598864, now seen corresponding path program 1 times [2024-01-27 15:12:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421837603] [2024-01-27 15:12:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421837603] [2024-01-27 15:12:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421837603] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:34,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:34,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:12:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025880284] [2024-01-27 15:12:34,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:12:34,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:12:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:12:34,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 111 [2024-01-27 15:12:34,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:34,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:34,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 111 [2024-01-27 15:12:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand