./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_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_70-funloop_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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:25:36,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:25:37,043 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:25:37,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:25:37,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:25:37,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:25:37,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:25:37,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:25:37,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:25:37,083 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:25:37,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:25:37,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:25:37,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:25:37,084 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:25:37,085 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:25:37,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:25:37,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:25:37,085 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:25:37,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:25:37,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:25:37,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:25:37,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:25:37,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:25:37,087 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:25:37,087 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:25:37,087 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:25:37,087 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:25:37,087 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:25:37,088 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:25:37,088 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:25:37,089 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:25:37,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:25:37,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:25:37,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:25:37,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:25:37,090 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:25:37,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:25:37,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:25:37,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:25:37,101 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:25:37,101 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:25:37,102 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:25:37,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:25:37,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-06-27 16:25:37,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:25:37,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:25:37,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:25:37,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:25:37,367 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:25:37,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-06-27 16:25:38,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:25:38,638 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:25:38,639 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-06-27 16:25:38,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20287f55a/6e3a8daaa6b147bba0bd2049b5c924c0/FLAG13e2451f1 [2024-06-27 16:25:38,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20287f55a/6e3a8daaa6b147bba0bd2049b5c924c0 [2024-06-27 16:25:38,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:25:38,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:25:38,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:25:38,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:25:38,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:25:38,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:25:38" (1/1) ... [2024-06-27 16:25:38,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3289059b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:38, skipping insertion in model container [2024-06-27 16:25:38,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:25:38" (1/1) ... [2024-06-27 16:25:38,724 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:25:39,010 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_70-funloop_racefree.i[41323,41336] [2024-06-27 16:25:39,044 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:25:39,058 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:25:39,085 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_70-funloop_racefree.i[41323,41336] [2024-06-27 16:25:39,091 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:25:39,137 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:25:39,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39 WrapperNode [2024-06-27 16:25:39,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:25:39,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:25:39,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:25:39,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:25:39,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,188 INFO L138 Inliner]: procedures = 272, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 218 [2024-06-27 16:25:39,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:25:39,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:25:39,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:25:39,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:25:39,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,212 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 5, 11, 2]. 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, 5, 1]. [2024-06-27 16:25:39,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,222 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:25:39,228 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:25:39,228 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:25:39,228 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:25:39,229 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (1/1) ... [2024-06-27 16:25:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:25:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:39,295 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 16:25:39,316 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 16:25:39,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 16:25:39,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 16:25:39,338 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 16:25:39,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:25:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:25:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:25:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 16:25:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:25:39,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:25:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 16:25:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 16:25:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 16:25:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:25:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-06-27 16:25:39,341 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-06-27 16:25:39,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:25:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:25:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:25:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 16:25:39,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:25:39,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:25:39,344 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 16:25:39,496 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:25:39,498 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:25:39,701 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:25:39,702 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:25:39,828 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:25:39,828 INFO L320 CfgBuilder]: Removed 25 assume(true) statements. [2024-06-27 16:25:39,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:25:39 BoogieIcfgContainer [2024-06-27 16:25:39,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:25:39,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:25:39,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:25:39,833 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:25:39,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:25:38" (1/3) ... [2024-06-27 16:25:39,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129e0e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:25:39, skipping insertion in model container [2024-06-27 16:25:39,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:25:39" (2/3) ... [2024-06-27 16:25:39,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129e0e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:25:39, skipping insertion in model container [2024-06-27 16:25:39,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:25:39" (3/3) ... [2024-06-27 16:25:39,835 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-06-27 16:25:39,842 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:25:39,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:25:39,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 16:25:39,850 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:25:39,885 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-06-27 16:25:39,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 97 transitions, 201 flow [2024-06-27 16:25:39,955 INFO L124 PetriNetUnfolderBase]: 41/143 cut-off events. [2024-06-27 16:25:39,956 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 16:25:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 41/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 539 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 90. Up to 8 conditions per place. [2024-06-27 16:25:39,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 97 transitions, 201 flow [2024-06-27 16:25:39,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 95 transitions, 194 flow [2024-06-27 16:25:39,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:39,984 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;@526209d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:39,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:25:39,992 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:39,992 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-06-27 16:25:39,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:39,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:39,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-06-27 16:25:39,993 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 16:25:39,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1661654838, now seen corresponding path program 1 times [2024-06-27 16:25:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:40,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713500852] [2024-06-27 16:25:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:40,174 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 16:25:40,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713500852] [2024-06-27 16:25:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713500852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:40,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732956428] [2024-06-27 16:25:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:40,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-06-27 16:25:40,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 95 transitions, 194 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 16:25:40,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:40,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-06-27 16:25:40,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:40,452 INFO L124 PetriNetUnfolderBase]: 483/1328 cut-off events. [2024-06-27 16:25:40,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:40,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 1328 events. 483/1328 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8498 event pairs, 396 based on Foata normal form. 297/1456 useless extension candidates. Maximal degree in co-relation 2168. Up to 909 conditions per place. [2024-06-27 16:25:40,463 INFO L140 encePairwiseOnDemand]: 72/97 looper letters, 45 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-06-27 16:25:40,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 246 flow [2024-06-27 16:25:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:25:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:25:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-06-27 16:25:40,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189003436426117 [2024-06-27 16:25:40,475 INFO L175 Difference]: Start difference. First operand has 71 places, 95 transitions, 194 flow. Second operand 3 states and 151 transitions. [2024-06-27 16:25:40,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 246 flow [2024-06-27 16:25:40,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:25:40,483 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 162 flow [2024-06-27 16:25:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-27 16:25:40,489 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-06-27 16:25:40,489 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 162 flow [2024-06-27 16:25:40,489 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 16:25:40,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:40,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:40,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:25:40,490 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 16:25:40,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1744152463, now seen corresponding path program 1 times [2024-06-27 16:25:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715946428] [2024-06-27 16:25:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:40,594 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 16:25:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715946428] [2024-06-27 16:25:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715946428] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891228945] [2024-06-27 16:25:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:40,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:40,603 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 16:25:40,633 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 16:25:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:40,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:25:40,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:40,720 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 16:25:40,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:40,734 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 16:25:40,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891228945] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:40,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:40,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:25:40,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085971568] [2024-06-27 16:25:40,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:40,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:25:40,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:25:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:25:40,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-06-27 16:25:40,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 162 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 16:25:40,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:40,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-06-27 16:25:40,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:40,916 INFO L124 PetriNetUnfolderBase]: 483/1331 cut-off events. [2024-06-27 16:25:40,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:25:40,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1331 events. 483/1331 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8498 event pairs, 396 based on Foata normal form. 0/1162 useless extension candidates. Maximal degree in co-relation 2246. Up to 909 conditions per place. [2024-06-27 16:25:40,922 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 45 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-06-27 16:25:40,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 274 flow [2024-06-27 16:25:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:25:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:25:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-06-27 16:25:40,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694158075601375 [2024-06-27 16:25:40,931 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 162 flow. Second operand 6 states and 215 transitions. [2024-06-27 16:25:40,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 274 flow [2024-06-27 16:25:40,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:40,934 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 194 flow [2024-06-27 16:25:40,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-06-27 16:25:40,935 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2024-06-27 16:25:40,939 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 194 flow [2024-06-27 16:25:40,940 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 16:25:40,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:40,940 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:40,959 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 16:25:41,152 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 16:25:41,153 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 16:25:41,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1352096394, now seen corresponding path program 2 times [2024-06-27 16:25:41,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:41,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790461682] [2024-06-27 16:25:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:41,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:41,262 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 16:25:41,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:41,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790461682] [2024-06-27 16:25:41,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790461682] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:41,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33259155] [2024-06-27 16:25:41,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:25:41,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:41,268 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 16:25:41,270 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 16:25:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:25:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:25:41,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:25:41,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:41,357 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 16:25:41,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:41,411 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 16:25:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33259155] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:41,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:41,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:25:41,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392552248] [2024-06-27 16:25:41,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:41,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:25:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:25:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:25:41,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-06-27 16:25:41,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 194 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 16:25:41,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:41,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-06-27 16:25:41,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:41,587 INFO L124 PetriNetUnfolderBase]: 483/1337 cut-off events. [2024-06-27 16:25:41,587 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-27 16:25:41,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 1337 events. 483/1337 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8496 event pairs, 396 based on Foata normal form. 6/1175 useless extension candidates. Maximal degree in co-relation 2237. Up to 909 conditions per place. [2024-06-27 16:25:41,592 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 45 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-27 16:25:41,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 342 flow [2024-06-27 16:25:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:25:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:25:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 386 transitions. [2024-06-27 16:25:41,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3316151202749141 [2024-06-27 16:25:41,595 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 194 flow. Second operand 12 states and 386 transitions. [2024-06-27 16:25:41,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 342 flow [2024-06-27 16:25:41,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 328 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:41,597 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 264 flow [2024-06-27 16:25:41,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=264, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2024-06-27 16:25:41,598 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 26 predicate places. [2024-06-27 16:25:41,598 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 264 flow [2024-06-27 16:25:41,598 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 16:25:41,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:41,598 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:41,613 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 16:25:41,813 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 16:25:41,814 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 16:25:41,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash -60670250, now seen corresponding path program 3 times [2024-06-27 16:25:41,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:41,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214089798] [2024-06-27 16:25:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:41,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:41,837 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:25:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:41,866 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:25:41,866 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:25:41,867 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:25:41,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:25:41,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:25:41,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:25:41,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:25:41,870 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 16:25:41,871 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:25:41,871 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:25:41,908 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:25:41,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 142 transitions, 300 flow [2024-06-27 16:25:41,937 INFO L124 PetriNetUnfolderBase]: 69/241 cut-off events. [2024-06-27 16:25:41,938 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 16:25:41,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 241 events. 69/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1103 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 145. Up to 12 conditions per place. [2024-06-27 16:25:41,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 142 transitions, 300 flow [2024-06-27 16:25:41,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 142 transitions, 300 flow [2024-06-27 16:25:41,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:41,942 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;@526209d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:41,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:25:41,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:41,946 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-06-27 16:25:41,946 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:25:41,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:41,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:41,946 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 16:25:41,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1023765236, now seen corresponding path program 1 times [2024-06-27 16:25:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:41,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348477312] [2024-06-27 16:25:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:41,969 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 16:25:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348477312] [2024-06-27 16:25:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348477312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:41,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:41,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262131695] [2024-06-27 16:25:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:41,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-06-27 16:25:41,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 300 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 16:25:41,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:41,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-06-27 16:25:41,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:44,125 INFO L124 PetriNetUnfolderBase]: 18464/36000 cut-off events. [2024-06-27 16:25:44,126 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-06-27 16:25:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62627 conditions, 36000 events. 18464/36000 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 336521 event pairs, 15876 based on Foata normal form. 8816/40294 useless extension candidates. Maximal degree in co-relation 50794. Up to 26524 conditions per place. [2024-06-27 16:25:44,309 INFO L140 encePairwiseOnDemand]: 106/142 looper letters, 68 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-06-27 16:25:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 110 transitions, 376 flow [2024-06-27 16:25:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:25:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:25:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-06-27 16:25:44,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258215962441315 [2024-06-27 16:25:44,310 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 300 flow. Second operand 3 states and 224 transitions. [2024-06-27 16:25:44,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 110 transitions, 376 flow [2024-06-27 16:25:44,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:25:44,313 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 246 flow [2024-06-27 16:25:44,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-06-27 16:25:44,313 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 3 predicate places. [2024-06-27 16:25:44,313 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 246 flow [2024-06-27 16:25:44,313 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 16:25:44,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:44,314 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:44,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:25:44,314 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 16:25:44,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash 225195785, now seen corresponding path program 1 times [2024-06-27 16:25:44,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:44,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942918615] [2024-06-27 16:25:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:44,364 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 16:25:44,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:44,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942918615] [2024-06-27 16:25:44,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942918615] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:44,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182914892] [2024-06-27 16:25:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:44,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:44,366 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 16:25:44,381 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 16:25:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:44,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:25:44,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:44,447 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 16:25:44,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:44,457 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 16:25:44,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182914892] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:44,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:44,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:25:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448720719] [2024-06-27 16:25:44,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:44,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:25:44,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:25:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:25:44,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-06-27 16:25:44,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 246 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 16:25:44,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:44,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-06-27 16:25:44,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:46,490 INFO L124 PetriNetUnfolderBase]: 18464/36003 cut-off events. [2024-06-27 16:25:46,491 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-06-27 16:25:46,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62643 conditions, 36003 events. 18464/36003 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 336454 event pairs, 15876 based on Foata normal form. 0/31481 useless extension candidates. Maximal degree in co-relation 62630. Up to 26524 conditions per place. [2024-06-27 16:25:46,670 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 68 selfloop transitions, 5 changer transitions 0/113 dead transitions. [2024-06-27 16:25:46,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 404 flow [2024-06-27 16:25:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:25:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:25:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2024-06-27 16:25:46,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37089201877934275 [2024-06-27 16:25:46,672 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 246 flow. Second operand 6 states and 316 transitions. [2024-06-27 16:25:46,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 404 flow [2024-06-27 16:25:46,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 113 transitions, 400 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:46,675 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 278 flow [2024-06-27 16:25:46,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-06-27 16:25:46,676 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 10 predicate places. [2024-06-27 16:25:46,677 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 278 flow [2024-06-27 16:25:46,677 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 16:25:46,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:46,677 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:46,690 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 16:25:46,890 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 16:25:46,891 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 16:25:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2040379340, now seen corresponding path program 2 times [2024-06-27 16:25:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:46,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687345838] [2024-06-27 16:25:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:46,941 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 16:25:46,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687345838] [2024-06-27 16:25:46,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687345838] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:25:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578605118] [2024-06-27 16:25:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:25:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:25:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:25:46,943 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 16:25:46,965 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 16:25:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:25:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:25:47,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:25:47,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:25:47,035 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 16:25:47,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:25:47,074 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 16:25:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578605118] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:25:47,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:25:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:25:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208461863] [2024-06-27 16:25:47,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:25:47,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:25:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:47,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:25:47,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:25:47,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-06-27 16:25:47,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 278 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 16:25:47,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:47,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-06-27 16:25:47,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:25:49,189 INFO L124 PetriNetUnfolderBase]: 18464/36009 cut-off events. [2024-06-27 16:25:49,190 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-06-27 16:25:49,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62680 conditions, 36009 events. 18464/36009 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 336564 event pairs, 15876 based on Foata normal form. 6/31494 useless extension candidates. Maximal degree in co-relation 62621. Up to 26524 conditions per place. [2024-06-27 16:25:49,331 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 68 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-06-27 16:25:49,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 119 transitions, 472 flow [2024-06-27 16:25:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:25:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:25:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 565 transitions. [2024-06-27 16:25:49,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3315727699530516 [2024-06-27 16:25:49,334 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 278 flow. Second operand 12 states and 565 transitions. [2024-06-27 16:25:49,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 119 transitions, 472 flow [2024-06-27 16:25:49,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 458 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:25:49,337 INFO L231 Difference]: Finished difference. Result has 131 places, 119 transitions, 348 flow [2024-06-27 16:25:49,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=348, PETRI_PLACES=131, PETRI_TRANSITIONS=119} [2024-06-27 16:25:49,337 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 26 predicate places. [2024-06-27 16:25:49,338 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 348 flow [2024-06-27 16:25:49,338 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 16:25:49,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:49,338 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 16:25:49,364 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 16:25:49,549 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 16:25:49,550 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 16:25:49,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:49,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2123065364, now seen corresponding path program 3 times [2024-06-27 16:25:49,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128589931] [2024-06-27 16:25:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:49,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:49,576 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:25:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:25:49,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:25:49,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:25:49,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:25:49,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:25:49,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:25:49,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:25:49,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:25:49,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:25:49,601 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-06-27 16:25:49,602 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:25:49,603 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:25:49,627 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:25:49,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 187 transitions, 401 flow [2024-06-27 16:25:49,653 INFO L124 PetriNetUnfolderBase]: 100/350 cut-off events. [2024-06-27 16:25:49,653 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 16:25:49,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 350 events. 100/350 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1812 event pairs, 1 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 250. Up to 16 conditions per place. [2024-06-27 16:25:49,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 187 transitions, 401 flow [2024-06-27 16:25:49,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 187 transitions, 401 flow [2024-06-27 16:25:49,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:25:49,662 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;@526209d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:25:49,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:25:49,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:25:49,670 INFO L124 PetriNetUnfolderBase]: 17/104 cut-off events. [2024-06-27 16:25:49,670 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 16:25:49,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:25:49,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:25:49,670 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 16:25:49,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:25:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1250725882, now seen corresponding path program 1 times [2024-06-27 16:25:49,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:25:49,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916958785] [2024-06-27 16:25:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:25:49,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:25:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:25:49,699 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 16:25:49,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:25:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916958785] [2024-06-27 16:25:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916958785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:25:49,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:25:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:25:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909364436] [2024-06-27 16:25:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:25:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:25:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:25:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:25:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:25:49,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 187 [2024-06-27 16:25:49,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 16:25:49,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:25:49,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 187 [2024-06-27 16:25:49,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand