./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 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:18:24,256 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:18:24,342 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:18:24,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:18:24,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:18:24,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:18:24,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:18:24,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:18:24,378 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:18:24,381 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:18:24,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:18:24,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:18:24,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:18:24,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:18:24,383 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:18:24,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:18:24,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:18:24,383 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:18:24,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:18:24,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:18:24,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:18:24,385 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:18:24,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:18:24,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:18:24,385 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:18:24,385 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:18:24,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:18:24,386 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:18:24,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:18:24,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:18:24,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:18:24,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:18:24,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:18:24,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:18:24,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:18:24,388 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:18:24,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:18:24,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:18:24,389 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:18:24,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:18:24,389 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:18:24,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:18:24,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:18:24,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:18:24,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:18:24,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:18:24,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:18:24,678 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:18:24,678 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:18:24,679 INFO L431 ainManager$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 [2024-02-19 14:18:25,715 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:18:25,943 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:18:25,943 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-02-19 14:18:25,967 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ef6ede5/9e536968acb74b7ca0693a7ab6daef0f/FLAGeaa00a198 [2024-02-19 14:18:25,978 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ef6ede5/9e536968acb74b7ca0693a7ab6daef0f [2024-02-19 14:18:25,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:18:25,981 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:18:25,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:18:25,983 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:18:25,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:18:25,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:18:25" (1/1) ... [2024-02-19 14:18:25,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0db41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:25, skipping insertion in model container [2024-02-19 14:18:25,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:18:25" (1/1) ... [2024-02-19 14:18:26,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:18:26,412 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2024-02-19 14:18:26,444 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:18:26,467 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:18:26,506 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2024-02-19 14:18:26,521 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:18:26,584 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:18:26,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26 WrapperNode [2024-02-19 14:18:26,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:18:26,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:18:26,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:18:26,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:18:26,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,654 INFO L138 Inliner]: procedures = 272, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 218 [2024-02-19 14:18:26,655 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:18:26,655 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:18:26,656 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:18:26,656 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:18:26,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,679 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,696 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 11, 2, 5]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5]. The 6 writes are split as follows [0, 5, 1, 0]. [2024-02-19 14:18:26,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:18:26,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:18:26,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:18:26,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:18:26,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (1/1) ... [2024-02-19 14:18:26,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:18:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:26,765 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) [2024-02-19 14:18:26,782 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 [2024-02-19 14:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-19 14:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:18:26,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:18:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:18:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:18:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:18:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:18:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:18:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-19 14:18:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:18:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-19 14:18:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-19 14:18:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:18:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:18:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:18:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:18:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:18:26,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:18:26,822 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:18:26,972 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:18:26,974 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:18:27,265 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:18:27,266 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:18:27,414 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:18:27,415 INFO L320 CfgBuilder]: Removed 25 assume(true) statements. [2024-02-19 14:18:27,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:18:27 BoogieIcfgContainer [2024-02-19 14:18:27,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:18:27,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:18:27,417 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:18:27,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:18:27,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:18:25" (1/3) ... [2024-02-19 14:18:27,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52540226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:18:27, skipping insertion in model container [2024-02-19 14:18:27,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:18:26" (2/3) ... [2024-02-19 14:18:27,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52540226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:18:27, skipping insertion in model container [2024-02-19 14:18:27,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:18:27" (3/3) ... [2024-02-19 14:18:27,425 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-02-19 14:18:27,438 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:18:27,439 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-19 14:18:27,439 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:18:27,470 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-19 14:18:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 97 transitions, 201 flow [2024-02-19 14:18:27,527 INFO L124 PetriNetUnfolderBase]: 41/143 cut-off events. [2024-02-19 14:18:27,527 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-19 14:18:27,532 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. [2024-02-19 14:18:27,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 97 transitions, 201 flow [2024-02-19 14:18:27,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 95 transitions, 194 flow [2024-02-19 14:18:27,542 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:18:27,547 INFO L369 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=All, 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;@2a1eb2ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:18:27,547 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 14:18:27,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:18:27,552 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-02-19 14:18:27,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:18:27,552 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:27,552 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-19 14:18:27,553 INFO L432 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)] === [2024-02-19 14:18:27,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1661654838, now seen corresponding path program 1 times [2024-02-19 14:18:27,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:27,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924028736] [2024-02-19 14:18:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:27,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:27,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924028736] [2024-02-19 14:18:27,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924028736] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:18:27,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:18:27,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:18:27,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784537017] [2024-02-19 14:18:27,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:18:27,774 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:18:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:18:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:18:27,824 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-02-19 14:18:27,826 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) [2024-02-19 14:18:27,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:27,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-02-19 14:18:27,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:28,116 INFO L124 PetriNetUnfolderBase]: 483/1328 cut-off events. [2024-02-19 14:18:28,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:18:28,125 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 8490 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. [2024-02-19 14:18:28,130 INFO L140 encePairwiseOnDemand]: 72/97 looper letters, 45 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-02-19 14:18:28,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 246 flow [2024-02-19 14:18:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:18:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:18:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-02-19 14:18:28,139 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5189003436426117 [2024-02-19 14:18:28,142 INFO L308 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-02-19 14:18:28,142 INFO L507 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 246 flow [2024-02-19 14:18:28,143 INFO L508 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) [2024-02-19 14:18:28,143 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:28,143 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-19 14:18:28,143 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:18:28,143 INFO L432 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)] === [2024-02-19 14:18:28,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1744152463, now seen corresponding path program 1 times [2024-02-19 14:18:28,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:28,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552494416] [2024-02-19 14:18:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552494416] [2024-02-19 14:18:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552494416] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814647714] [2024-02-19 14:18:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:28,242 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) [2024-02-19 14:18:28,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:18:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:28,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:18:28,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:28,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:28,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814647714] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:28,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:28,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-02-19 14:18:28,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794617108] [2024-02-19 14:18:28,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:28,377 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:18:28,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:18:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:18:28,378 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-02-19 14:18:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 246 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) [2024-02-19 14:18:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:28,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-02-19 14:18:28,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:28,572 INFO L124 PetriNetUnfolderBase]: 483/1331 cut-off events. [2024-02-19 14:18:28,572 INFO L125 PetriNetUnfolderBase]: For 151/189 co-relation queries the response was YES. [2024-02-19 14:18:28,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 1331 events. 483/1331 cut-off events. For 151/189 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8489 event pairs, 396 based on Foata normal form. 0/1162 useless extension candidates. Maximal degree in co-relation 3050. Up to 912 conditions per place. [2024-02-19 14:18:28,579 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 45 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2024-02-19 14:18:28,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 358 flow [2024-02-19 14:18:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:18:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:18:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-02-19 14:18:28,584 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3694158075601375 [2024-02-19 14:18:28,585 INFO L308 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-02-19 14:18:28,585 INFO L507 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 358 flow [2024-02-19 14:18:28,587 INFO L508 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) [2024-02-19 14:18:28,588 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:28,588 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:28,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:28,800 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:28,800 INFO L432 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)] === [2024-02-19 14:18:28,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1352096394, now seen corresponding path program 2 times [2024-02-19 14:18:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051017073] [2024-02-19 14:18:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:28,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:28,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051017073] [2024-02-19 14:18:28,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051017073] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:28,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179924638] [2024-02-19 14:18:28,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:18:28,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:28,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:28,935 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) [2024-02-19 14:18:28,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:18:29,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:18:29,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:18:29,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:18:29,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:29,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:18:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179924638] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:29,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:29,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 14:18:29,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015711392] [2024-02-19 14:18:29,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:29,061 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:18:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:18:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:18:29,062 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 97 [2024-02-19 14:18:29,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 358 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) [2024-02-19 14:18:29,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:29,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 97 [2024-02-19 14:18:29,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:29,247 INFO L124 PetriNetUnfolderBase]: 483/1337 cut-off events. [2024-02-19 14:18:29,247 INFO L125 PetriNetUnfolderBase]: For 453/529 co-relation queries the response was YES. [2024-02-19 14:18:29,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 1337 events. 483/1337 cut-off events. For 453/529 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8505 event pairs, 396 based on Foata normal form. 0/1168 useless extension candidates. Maximal degree in co-relation 3932. Up to 918 conditions per place. [2024-02-19 14:18:29,255 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 45 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-02-19 14:18:29,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 506 flow [2024-02-19 14:18:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:18:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:18:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 386 transitions. [2024-02-19 14:18:29,258 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3316151202749141 [2024-02-19 14:18:29,259 INFO L308 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2024-02-19 14:18:29,259 INFO L507 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 506 flow [2024-02-19 14:18:29,260 INFO L508 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) [2024-02-19 14:18:29,260 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:29,260 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:29,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:29,474 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-19 14:18:29,475 INFO L432 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)] === [2024-02-19 14:18:29,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash -60670250, now seen corresponding path program 3 times [2024-02-19 14:18:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:29,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708696357] [2024-02-19 14:18:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:29,507 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:18:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:29,548 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:18:29,548 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:18:29,549 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-19 14:18:29,550 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-19 14:18:29,551 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-19 14:18:29,551 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-19 14:18:29,551 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:18:29,551 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2024-02-19 14:18:29,553 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:18:29,553 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-19 14:18:29,590 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 14:18:29,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 142 transitions, 300 flow [2024-02-19 14:18:29,610 INFO L124 PetriNetUnfolderBase]: 69/241 cut-off events. [2024-02-19 14:18:29,610 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-19 14:18:29,611 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. [2024-02-19 14:18:29,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 142 transitions, 300 flow [2024-02-19 14:18:29,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 142 transitions, 300 flow [2024-02-19 14:18:29,614 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:18:29,619 INFO L369 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=All, 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;@2a1eb2ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:18:29,619 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-19 14:18:29,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:18:29,623 INFO L124 PetriNetUnfolderBase]: 7/53 cut-off events. [2024-02-19 14:18:29,623 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 14:18:29,623 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:29,623 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:29,623 INFO L432 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)] === [2024-02-19 14:18:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1023765236, now seen corresponding path program 1 times [2024-02-19 14:18:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711031376] [2024-02-19 14:18:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:29,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711031376] [2024-02-19 14:18:29,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711031376] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:18:29,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:18:29,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:18:29,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783116197] [2024-02-19 14:18:29,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:18:29,676 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:18:29,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:18:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:18:29,678 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-02-19 14:18:29,678 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) [2024-02-19 14:18:29,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:29,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-02-19 14:18:29,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:32,210 INFO L124 PetriNetUnfolderBase]: 18464/36000 cut-off events. [2024-02-19 14:18:32,210 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-02-19 14:18:32,268 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 336464 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. [2024-02-19 14:18:32,390 INFO L140 encePairwiseOnDemand]: 106/142 looper letters, 68 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2024-02-19 14:18:32,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 110 transitions, 376 flow [2024-02-19 14:18:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:18:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:18:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-02-19 14:18:32,392 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5258215962441315 [2024-02-19 14:18:32,392 INFO L308 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2024-02-19 14:18:32,392 INFO L507 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 376 flow [2024-02-19 14:18:32,393 INFO L508 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) [2024-02-19 14:18:32,393 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:32,393 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-19 14:18:32,393 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:18:32,393 INFO L432 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)] === [2024-02-19 14:18:32,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:32,394 INFO L85 PathProgramCache]: Analyzing trace with hash 225195785, now seen corresponding path program 1 times [2024-02-19 14:18:32,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:32,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50826701] [2024-02-19 14:18:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:32,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:32,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50826701] [2024-02-19 14:18:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50826701] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:32,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280095936] [2024-02-19 14:18:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:32,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:32,439 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) [2024-02-19 14:18:32,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:18:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:32,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:18:32,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:32,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280095936] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:32,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:32,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-02-19 14:18:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654276244] [2024-02-19 14:18:32,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:32,528 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:18:32,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:18:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:18:32,529 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-02-19 14:18:32,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 376 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) [2024-02-19 14:18:32,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-02-19 14:18:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:34,830 INFO L124 PetriNetUnfolderBase]: 18464/36003 cut-off events. [2024-02-19 14:18:34,831 INFO L125 PetriNetUnfolderBase]: For 3617/5651 co-relation queries the response was YES. [2024-02-19 14:18:34,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89161 conditions, 36003 events. 18464/36003 cut-off events. For 3617/5651 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 336607 event pairs, 15876 based on Foata normal form. 0/31481 useless extension candidates. Maximal degree in co-relation 72263. Up to 26527 conditions per place. [2024-02-19 14:18:34,997 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 68 selfloop transitions, 5 changer transitions 0/113 dead transitions. [2024-02-19 14:18:34,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 534 flow [2024-02-19 14:18:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:18:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:18:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 316 transitions. [2024-02-19 14:18:34,999 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37089201877934275 [2024-02-19 14:18:35,002 INFO L308 CegarLoopForPetriNet]: 105 programPoint places, 7 predicate places. [2024-02-19 14:18:35,003 INFO L507 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 534 flow [2024-02-19 14:18:35,003 INFO L508 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) [2024-02-19 14:18:35,003 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:35,004 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:35,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:35,215 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:35,215 INFO L432 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)] === [2024-02-19 14:18:35,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2040379340, now seen corresponding path program 2 times [2024-02-19 14:18:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:35,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658610125] [2024-02-19 14:18:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:35,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:35,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658610125] [2024-02-19 14:18:35,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658610125] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:18:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294765754] [2024-02-19 14:18:35,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:18:35,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:18:35,300 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) [2024-02-19 14:18:35,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:18:35,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:18:35,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:18:35,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:18:35,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:18:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:35,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:18:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 14:18:35,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294765754] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:18:35,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:18:35,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 14:18:35,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90600651] [2024-02-19 14:18:35,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:18:35,440 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:18:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:18:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:18:35,442 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 142 [2024-02-19 14:18:35,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 534 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) [2024-02-19 14:18:35,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:35,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 142 [2024-02-19 14:18:35,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:18:37,791 INFO L124 PetriNetUnfolderBase]: 18464/36009 cut-off events. [2024-02-19 14:18:37,792 INFO L125 PetriNetUnfolderBase]: For 10535/14603 co-relation queries the response was YES. [2024-02-19 14:18:37,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115713 conditions, 36009 events. 18464/36009 cut-off events. For 10535/14603 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 336685 event pairs, 15876 based on Foata normal form. 0/31487 useless extension candidates. Maximal degree in co-relation 93732. Up to 26533 conditions per place. [2024-02-19 14:18:38,165 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 68 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-02-19 14:18:38,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 119 transitions, 728 flow [2024-02-19 14:18:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:18:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:18:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 565 transitions. [2024-02-19 14:18:38,169 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3315727699530516 [2024-02-19 14:18:38,170 INFO L308 CegarLoopForPetriNet]: 105 programPoint places, 18 predicate places. [2024-02-19 14:18:38,171 INFO L507 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 728 flow [2024-02-19 14:18:38,171 INFO L508 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) [2024-02-19 14:18:38,171 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:38,171 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2024-02-19 14:18:38,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:18:38,386 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:18:38,386 INFO L432 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)] === [2024-02-19 14:18:38,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2123065364, now seen corresponding path program 3 times [2024-02-19 14:18:38,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:38,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591438845] [2024-02-19 14:18:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:38,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:38,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:18:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:18:38,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:18:38,431 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:18:38,432 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-19 14:18:38,432 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-19 14:18:38,432 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-19 14:18:38,432 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-19 14:18:38,432 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-19 14:18:38,433 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-19 14:18:38,433 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2024-02-19 14:18:38,434 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:18:38,434 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-19 14:18:38,461 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-19 14:18:38,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 187 transitions, 401 flow [2024-02-19 14:18:38,485 INFO L124 PetriNetUnfolderBase]: 100/350 cut-off events. [2024-02-19 14:18:38,485 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-19 14:18:38,487 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. [2024-02-19 14:18:38,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 187 transitions, 401 flow [2024-02-19 14:18:38,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 187 transitions, 401 flow [2024-02-19 14:18:38,494 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:18:38,494 INFO L369 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=All, 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;@2a1eb2ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:18:38,495 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-19 14:18:38,501 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:18:38,502 INFO L124 PetriNetUnfolderBase]: 17/104 cut-off events. [2024-02-19 14:18:38,502 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-19 14:18:38,502 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:18:38,502 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:18:38,502 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-19 14:18:38,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:18:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1250725882, now seen corresponding path program 1 times [2024-02-19 14:18:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:18:38,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244443545] [2024-02-19 14:18:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:18:38,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:18:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:18:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:18:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:18:38,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244443545] [2024-02-19 14:18:38,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244443545] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:18:38,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:18:38,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:18:38,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549569546] [2024-02-19 14:18:38,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:18:38,526 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:18:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:18:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:18:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:18:38,527 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 187 [2024-02-19 14:18:38,527 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) [2024-02-19 14:18:38,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:18:38,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 187 [2024-02-19 14:18:38,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand