./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_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_75-tricky_address2_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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:25:44,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:25:44,954 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:25:44,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:25:44,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:25:44,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:25:44,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:25:44,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:25:44,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:25:44,982 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:25:44,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:25:44,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:25:44,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:25:44,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:25:44,985 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:25:44,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:25:44,985 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:25:44,985 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:25:44,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:25:44,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:25:44,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:25:44,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:25:44,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:25:44,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:25:44,987 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:25:44,987 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:25:44,987 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:25:44,988 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:25:44,988 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:25:44,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:25:44,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:25:44,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:25:44,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:25:44,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:25:44,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:25:44,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:25:44,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:25:44,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:25:44,991 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:25:44,991 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:25:44,991 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:25:44,991 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:25:44,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:25:44,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2024-06-27 16:25:45,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:25:45,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:25:45,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:25:45,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:25:45,256 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:25:45,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2024-06-27 16:25:46,188 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:25:46,436 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:25:46,437 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2024-06-27 16:25:46,451 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/753659054/f964965cb8ac4b11b20bd34257121ae8/FLAGfd86a126d [2024-06-27 16:25:46,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/753659054/f964965cb8ac4b11b20bd34257121ae8 [2024-06-27 16:25:46,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:25:46,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:25:46,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:25:46,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:25:46,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:25:46,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:25:46" (1/1) ... [2024-06-27 16:25:46,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d94b0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:46, skipping insertion in model container [2024-06-27 16:25:46,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:25:46" (1/1) ... [2024-06-27 16:25:46,528 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:25:46,916 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_75-tricky_address2_racefree.i[41323,41336] [2024-06-27 16:25:46,956 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:25:46,994 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:25:47,035 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_75-tricky_address2_racefree.i[41323,41336] [2024-06-27 16:25:47,061 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:25:47,122 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:25:47,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47 WrapperNode [2024-06-27 16:25:47,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:25:47,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:25:47,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:25:47,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:25:47,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,165 INFO L138 Inliner]: procedures = 271, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 213 [2024-06-27 16:25:47,165 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:25:47,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:25:47,166 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:25:47,166 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:25:47,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,203 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 5, 2, 11]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 6 writes are split as follows [0, 0, 1, 5]. [2024-06-27 16:25:47,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:25:47,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:25:47,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:25:47,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:25:47,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (1/1) ... [2024-06-27 16:25:47,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:25:47,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:47,265 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 16:25:47,267 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 16:25:47,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 16:25:47,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 16:25:47,307 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 16:25:47,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:25:47,307 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-06-27 16:25:47,307 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-06-27 16:25:47,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:25:47,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:25:47,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:25:47,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 16:25:47,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:25:47,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:25:47,309 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 16:25:47,423 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:25:47,425 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:25:47,675 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:25:47,675 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:25:47,775 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:25:47,778 INFO L320 CfgBuilder]: Removed 23 assume(true) statements. [2024-06-27 16:25:47,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:25:47 BoogieIcfgContainer [2024-06-27 16:25:47,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:25:47,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:25:47,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:25:47,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:25:47,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:25:46" (1/3) ... [2024-06-27 16:25:47,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6210c326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:25:47, skipping insertion in model container [2024-06-27 16:25:47,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:47" (2/3) ... [2024-06-27 16:25:47,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6210c326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:25:47, skipping insertion in model container [2024-06-27 16:25:47,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:25:47" (3/3) ... [2024-06-27 16:25:47,785 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2024-06-27 16:25:47,792 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:25:47,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:25:47,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 16:25:47,802 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:25:47,847 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-06-27 16:25:47,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 93 transitions, 193 flow [2024-06-27 16:25:47,932 INFO L124 PetriNetUnfolderBase]: 38/137 cut-off events. [2024-06-27 16:25:47,933 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 16:25:47,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 137 events. 38/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 544 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 86. Up to 8 conditions per place. [2024-06-27 16:25:47,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 93 transitions, 193 flow [2024-06-27 16:25:47,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 91 transitions, 186 flow [2024-06-27 16:25:47,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:47,954 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;@1ba40b3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:47,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:25:47,959 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:47,962 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-06-27 16:25:47,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:47,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:47,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-06-27 16:25:47,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:25:47,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1934464289, now seen corresponding path program 1 times [2024-06-27 16:25:47,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:47,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194488371] [2024-06-27 16:25:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:48,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194488371] [2024-06-27 16:25:48,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194488371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:48,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:48,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:48,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597830941] [2024-06-27 16:25:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:48,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:48,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:48,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-06-27 16:25:48,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 91 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 16:25:48,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:48,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-06-27 16:25:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:48,562 INFO L124 PetriNetUnfolderBase]: 399/1134 cut-off events. [2024-06-27 16:25:48,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:48,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 1134 events. 399/1134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7244 event pairs, 357 based on Foata normal form. 278/1290 useless extension candidates. Maximal degree in co-relation 1859. Up to 789 conditions per place. [2024-06-27 16:25:48,572 INFO L140 encePairwiseOnDemand]: 68/93 looper letters, 41 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-06-27 16:25:48,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 230 flow [2024-06-27 16:25:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:25:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:25:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-06-27 16:25:48,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-06-27 16:25:48,587 INFO L175 Difference]: Start difference. First operand has 69 places, 91 transitions, 186 flow. Second operand 3 states and 147 transitions. [2024-06-27 16:25:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 230 flow [2024-06-27 16:25:48,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:25:48,594 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 154 flow [2024-06-27 16:25:48,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-27 16:25:48,599 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-06-27 16:25:48,600 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 154 flow [2024-06-27 16:25:48,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 16:25:48,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:48,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:48,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:25:48,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:25:48,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1509947759, now seen corresponding path program 1 times [2024-06-27 16:25:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:48,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638853097] [2024-06-27 16:25:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:48,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638853097] [2024-06-27 16:25:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638853097] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470347579] [2024-06-27 16:25:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:48,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:48,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:25:48,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:25:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:48,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:25:48,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:48,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470347579] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:48,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:48,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:25:48,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811183072] [2024-06-27 16:25:48,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:25:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:48,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:25:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:25:48,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-06-27 16:25:48,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 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 16:25:48,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-06-27 16:25:48,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:49,031 INFO L124 PetriNetUnfolderBase]: 399/1137 cut-off events. [2024-06-27 16:25:49,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:49,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 1137 events. 399/1137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7236 event pairs, 357 based on Foata normal form. 0/1015 useless extension candidates. Maximal degree in co-relation 1932. Up to 789 conditions per place. [2024-06-27 16:25:49,035 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 41 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-06-27 16:25:49,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 258 flow [2024-06-27 16:25:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:25:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:25:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-06-27 16:25:49,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781362007168459 [2024-06-27 16:25:49,044 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 154 flow. Second operand 6 states and 211 transitions. [2024-06-27 16:25:49,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 258 flow [2024-06-27 16:25:49,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 254 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:49,047 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 186 flow [2024-06-27 16:25:49,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-06-27 16:25:49,048 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2024-06-27 16:25:49,052 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 186 flow [2024-06-27 16:25:49,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 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 16:25:49,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:49,052 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:49,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:25:49,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:49,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:25:49,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash -988384991, now seen corresponding path program 2 times [2024-06-27 16:25:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:49,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686797373] [2024-06-27 16:25:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:49,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686797373] [2024-06-27 16:25:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686797373] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77415007] [2024-06-27 16:25:49,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:25:49,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:49,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:25:49,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:25:49,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:25:49,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:25:49,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:25:49,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:49,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:25:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77415007] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:49,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:49,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:25:49,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296222630] [2024-06-27 16:25:49,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:25:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:49,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:25:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:25:49,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-06-27 16:25:49,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 186 flow. Second operand has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 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 16:25:49,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:49,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-06-27 16:25:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:49,781 INFO L124 PetriNetUnfolderBase]: 399/1143 cut-off events. [2024-06-27 16:25:49,781 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-27 16:25:49,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 1143 events. 399/1143 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7221 event pairs, 357 based on Foata normal form. 6/1028 useless extension candidates. Maximal degree in co-relation 1923. Up to 789 conditions per place. [2024-06-27 16:25:49,787 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 41 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-27 16:25:49,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 79 transitions, 326 flow [2024-06-27 16:25:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:25:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:25:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 382 transitions. [2024-06-27 16:25:49,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34229390681003585 [2024-06-27 16:25:49,790 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 186 flow. Second operand 12 states and 382 transitions. [2024-06-27 16:25:49,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 79 transitions, 326 flow [2024-06-27 16:25:49,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 79 transitions, 312 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:49,794 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 256 flow [2024-06-27 16:25:49,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-06-27 16:25:49,795 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 26 predicate places. [2024-06-27 16:25:49,795 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 256 flow [2024-06-27 16:25:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 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 16:25:49,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:49,796 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:49,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:25:50,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-27 16:25:50,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:25:50,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2091812063, now seen corresponding path program 3 times [2024-06-27 16:25:50,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:50,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518663845] [2024-06-27 16:25:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:50,032 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:25:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:50,062 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:25:50,062 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:25:50,063 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:25:50,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:25:50,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:25:50,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:25:50,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:25:50,065 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 16:25:50,067 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:25:50,067 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:25:50,088 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:25:50,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 136 transitions, 288 flow [2024-06-27 16:25:50,103 INFO L124 PetriNetUnfolderBase]: 64/231 cut-off events. [2024-06-27 16:25:50,103 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 16:25:50,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 231 events. 64/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1084 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 139. Up to 12 conditions per place. [2024-06-27 16:25:50,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 136 transitions, 288 flow [2024-06-27 16:25:50,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 136 transitions, 288 flow [2024-06-27 16:25:50,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:50,108 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;@1ba40b3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:50,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:25:50,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:50,112 INFO L124 PetriNetUnfolderBase]: 7/54 cut-off events. [2024-06-27 16:25:50,112 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:25:50,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:50,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:50,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:50,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash 796306266, now seen corresponding path program 1 times [2024-06-27 16:25:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:50,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685756873] [2024-06-27 16:25:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:50,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:50,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685756873] [2024-06-27 16:25:50,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685756873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:50,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:50,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:50,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850405052] [2024-06-27 16:25:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:50,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:50,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:50,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 136 [2024-06-27 16:25:50,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 136 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 16:25:50,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:50,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 136 [2024-06-27 16:25:50,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:52,354 INFO L124 PetriNetUnfolderBase]: 14783/28870 cut-off events. [2024-06-27 16:25:52,356 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 16:25:52,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50828 conditions, 28870 events. 14783/28870 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 265851 event pairs, 13600 based on Foata normal form. 7914/33823 useless extension candidates. Maximal degree in co-relation 40721. Up to 21860 conditions per place. [2024-06-27 16:25:52,496 INFO L140 encePairwiseOnDemand]: 100/136 looper letters, 62 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-06-27 16:25:52,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 104 transitions, 352 flow [2024-06-27 16:25:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:25:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:25:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-06-27 16:25:52,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343137254901961 [2024-06-27 16:25:52,498 INFO L175 Difference]: Start difference. First operand has 102 places, 136 transitions, 288 flow. Second operand 3 states and 218 transitions. [2024-06-27 16:25:52,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 104 transitions, 352 flow [2024-06-27 16:25:52,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 104 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:25:52,506 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 234 flow [2024-06-27 16:25:52,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2024-06-27 16:25:52,507 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2024-06-27 16:25:52,508 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 234 flow [2024-06-27 16:25:52,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 16:25:52,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:52,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:52,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:25:52,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:52,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash -191595918, now seen corresponding path program 1 times [2024-06-27 16:25:52,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:52,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544316256] [2024-06-27 16:25:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:52,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:52,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544316256] [2024-06-27 16:25:52,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544316256] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857988574] [2024-06-27 16:25:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:52,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:52,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:25:52,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:25:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:52,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:25:52,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:52,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:52,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857988574] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:52,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:52,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:25:52,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984729683] [2024-06-27 16:25:52,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:52,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:25:52,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:25:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:25:52,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 136 [2024-06-27 16:25:52,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 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 16:25:52,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:52,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 136 [2024-06-27 16:25:52,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:54,572 INFO L124 PetriNetUnfolderBase]: 14783/28873 cut-off events. [2024-06-27 16:25:54,572 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 16:25:54,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50844 conditions, 28873 events. 14783/28873 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 265934 event pairs, 13600 based on Foata normal form. 0/25912 useless extension candidates. Maximal degree in co-relation 50831. Up to 21860 conditions per place. [2024-06-27 16:25:54,694 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 62 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2024-06-27 16:25:54,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 380 flow [2024-06-27 16:25:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:25:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:25:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 310 transitions. [2024-06-27 16:25:54,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799019607843137 [2024-06-27 16:25:54,696 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 234 flow. Second operand 6 states and 310 transitions. [2024-06-27 16:25:54,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 380 flow [2024-06-27 16:25:54,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 376 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:54,702 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 266 flow [2024-06-27 16:25:54,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-06-27 16:25:54,704 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 10 predicate places. [2024-06-27 16:25:54,705 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 266 flow [2024-06-27 16:25:54,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.714285714285715) internal successors, (292), 7 states have internal predecessors, (292), 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 16:25:54,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:54,706 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:54,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 16:25:54,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:54,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:54,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1878896986, now seen corresponding path program 2 times [2024-06-27 16:25:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:54,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791311595] [2024-06-27 16:25:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:54,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:55,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:55,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791311595] [2024-06-27 16:25:55,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791311595] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:55,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210862994] [2024-06-27 16:25:55,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:25:55,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:55,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:25:55,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:25:55,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:25:55,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:25:55,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:25:55,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:55,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:25:55,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210862994] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:55,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:55,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:25:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117750719] [2024-06-27 16:25:55,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:55,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:25:55,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:25:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:25:55,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 136 [2024-06-27 16:25:55,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 266 flow. Second operand has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 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 16:25:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 136 [2024-06-27 16:25:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:57,072 INFO L124 PetriNetUnfolderBase]: 14783/28879 cut-off events. [2024-06-27 16:25:57,073 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-27 16:25:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50881 conditions, 28879 events. 14783/28879 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 266097 event pairs, 13600 based on Foata normal form. 6/25925 useless extension candidates. Maximal degree in co-relation 50822. Up to 21860 conditions per place. [2024-06-27 16:25:57,215 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 62 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-27 16:25:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 448 flow [2024-06-27 16:25:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:25:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:25:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 559 transitions. [2024-06-27 16:25:57,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425245098039216 [2024-06-27 16:25:57,218 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 266 flow. Second operand 12 states and 559 transitions. [2024-06-27 16:25:57,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 448 flow [2024-06-27 16:25:57,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 113 transitions, 434 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:57,224 INFO L231 Difference]: Finished difference. Result has 128 places, 113 transitions, 336 flow [2024-06-27 16:25:57,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=336, PETRI_PLACES=128, PETRI_TRANSITIONS=113} [2024-06-27 16:25:57,225 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 26 predicate places. [2024-06-27 16:25:57,225 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 113 transitions, 336 flow [2024-06-27 16:25:57,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 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 16:25:57,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:57,226 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:57,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:25:57,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:57,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:25:57,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -222782886, now seen corresponding path program 3 times [2024-06-27 16:25:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278446004] [2024-06-27 16:25:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:57,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:57,465 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:25:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:57,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:25:57,599 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:25:57,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:25:57,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:25:57,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:25:57,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:25:57,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:25:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:25:57,600 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 16:25:57,601 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:25:57,601 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:25:57,636 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:25:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 179 transitions, 385 flow [2024-06-27 16:25:57,656 INFO L124 PetriNetUnfolderBase]: 93/336 cut-off events. [2024-06-27 16:25:57,656 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 16:25:57,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 336 events. 93/336 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1697 event pairs, 1 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 240. Up to 16 conditions per place. [2024-06-27 16:25:57,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 179 transitions, 385 flow [2024-06-27 16:25:57,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 179 transitions, 385 flow [2024-06-27 16:25:57,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:57,667 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;@1ba40b3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:57,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:25:57,672 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:57,672 INFO L124 PetriNetUnfolderBase]: 13/84 cut-off events. [2024-06-27 16:25:57,672 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:25:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:57,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:57,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:25:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 687690589, now seen corresponding path program 1 times [2024-06-27 16:25:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016816776] [2024-06-27 16:25:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:57,707 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 16:25:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016816776] [2024-06-27 16:25:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016816776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:57,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:57,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:57,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026363140] [2024-06-27 16:25:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:57,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:57,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 179 [2024-06-27 16:25:57,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 16:25:57,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:57,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 179 [2024-06-27 16:25:57,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand