./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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/weaver/popl20-nonblocking-cntr.wvr.c -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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:33:01,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:33:01,267 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:33:01,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:33:01,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:33:01,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:33:01,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:33:01,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:33:01,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:33:01,337 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:33:01,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:33:01,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:33:01,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:33:01,340 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:33:01,340 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:33:01,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:33:01,341 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:33:01,341 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:33:01,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:33:01,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:33:01,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:33:01,342 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:33:01,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:33:01,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:33:01,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:33:01,354 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:33:01,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:33:01,354 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:33:01,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:33:01,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:33:01,356 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:33:01,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:33:01,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:33:01,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:33:01,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:33:01,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:33:01,357 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:33:01,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:33:01,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:33:01,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:33:01,357 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:33:01,358 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:33:01,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:33:01,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:33:01,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:33:01,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:33:01,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:33:01,750 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:33:01,750 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:33:01,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-02-20 12:33:03,422 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:33:03,716 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:33:03,725 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-02-20 12:33:03,735 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3797cf3/746b8f864176473194179b8371b425a8/FLAG194545a40 [2024-02-20 12:33:03,768 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3797cf3/746b8f864176473194179b8371b425a8 [2024-02-20 12:33:03,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:33:03,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:33:03,784 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:33:03,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:33:03,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:33:03,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:33:03" (1/1) ... [2024-02-20 12:33:03,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a280bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:03, skipping insertion in model container [2024-02-20 12:33:03,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:33:03" (1/1) ... [2024-02-20 12:33:03,826 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:33:04,119 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2024-02-20 12:33:04,140 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:33:04,148 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:33:04,198 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2024-02-20 12:33:04,205 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:33:04,219 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:33:04,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04 WrapperNode [2024-02-20 12:33:04,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:33:04,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:33:04,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:33:04,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:33:04,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,286 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2024-02-20 12:33:04,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:33:04,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:33:04,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:33:04,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:33:04,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,321 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,352 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-20 12:33:04,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,372 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,374 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:33:04,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:33:04,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:33:04,391 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:33:04,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (1/1) ... [2024-02-20 12:33:04,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:33:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:04,442 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) [2024-02-20 12:33:04,466 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 [2024-02-20 12:33:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:33:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:33:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:33:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:33:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:33:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:33:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:33:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:33:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:33:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:33:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:33:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:33:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:33:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:33:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:33:04,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:33:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:33:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:33:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:33:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:33:04,538 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:33:04,684 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:33:04,686 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:33:04,956 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:33:04,956 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:33:05,165 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:33:05,181 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 12:33:05,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:33:05 BoogieIcfgContainer [2024-02-20 12:33:05,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:33:05,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:33:05,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:33:05,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:33:05,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:33:03" (1/3) ... [2024-02-20 12:33:05,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58beaab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:33:05, skipping insertion in model container [2024-02-20 12:33:05,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:33:04" (2/3) ... [2024-02-20 12:33:05,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58beaab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:33:05, skipping insertion in model container [2024-02-20 12:33:05,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:33:05" (3/3) ... [2024-02-20 12:33:05,199 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-02-20 12:33:05,243 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:33:05,243 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:33:05,244 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:33:05,294 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:33:05,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-02-20 12:33:05,415 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-02-20 12:33:05,415 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:33:05,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-02-20 12:33:05,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-02-20 12:33:05,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-02-20 12:33:05,457 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:33:05,463 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;@608f1879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:33:05,463 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 12:33:05,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:33:05,481 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-02-20 12:33:05,481 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:33:05,481 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:05,482 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:05,482 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:05,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash 798775499, now seen corresponding path program 1 times [2024-02-20 12:33:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:05,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200738600] [2024-02-20 12:33:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200738600] [2024-02-20 12:33:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200738600] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:33:06,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:33:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:33:06,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969447987] [2024-02-20 12:33:06,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:33:06,091 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:33:06,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:33:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:33:06,195 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 22 [2024-02-20 12:33:06,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-02-20 12:33:06,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:06,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 22 [2024-02-20 12:33:06,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:06,347 INFO L124 PetriNetUnfolderBase]: 73/147 cut-off events. [2024-02-20 12:33:06,347 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-20 12:33:06,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 147 events. 73/147 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 510 event pairs, 32 based on Foata normal form. 10/154 useless extension candidates. Maximal degree in co-relation 235. Up to 97 conditions per place. [2024-02-20 12:33:06,350 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 19 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-02-20 12:33:06,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 111 flow [2024-02-20 12:33:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:33:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:33:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-02-20 12:33:06,373 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-02-20 12:33:06,377 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2024-02-20 12:33:06,377 INFO L507 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 111 flow [2024-02-20 12:33:06,378 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-02-20 12:33:06,378 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:06,378 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:06,378 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:33:06,379 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:06,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash 689177153, now seen corresponding path program 1 times [2024-02-20 12:33:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:06,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36256945] [2024-02-20 12:33:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:06,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:06,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36256945] [2024-02-20 12:33:06,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36256945] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:33:06,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:33:06,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:33:06,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027013158] [2024-02-20 12:33:06,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:33:06,577 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:33:06,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:33:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:33:06,591 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 22 [2024-02-20 12:33:06,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2024-02-20 12:33:06,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:06,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 22 [2024-02-20 12:33:06,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:06,710 INFO L124 PetriNetUnfolderBase]: 92/187 cut-off events. [2024-02-20 12:33:06,710 INFO L125 PetriNetUnfolderBase]: For 66/72 co-relation queries the response was YES. [2024-02-20 12:33:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 187 events. 92/187 cut-off events. For 66/72 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 644 event pairs, 27 based on Foata normal form. 13/199 useless extension candidates. Maximal degree in co-relation 442. Up to 123 conditions per place. [2024-02-20 12:33:06,716 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 29 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-02-20 12:33:06,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 224 flow [2024-02-20 12:33:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:33:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:33:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-02-20 12:33:06,720 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-02-20 12:33:06,721 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2024-02-20 12:33:06,721 INFO L507 AbstractCegarLoop]: Abstraction has has 30 places, 37 transitions, 224 flow [2024-02-20 12:33:06,721 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2024-02-20 12:33:06,721 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:06,722 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:06,722 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:33:06,722 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:06,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash -542619565, now seen corresponding path program 1 times [2024-02-20 12:33:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:06,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589561674] [2024-02-20 12:33:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:06,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:07,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589561674] [2024-02-20 12:33:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589561674] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688339923] [2024-02-20 12:33:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:07,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:07,028 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) [2024-02-20 12:33:07,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:33:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:07,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:33:07,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:07,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:07,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688339923] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:07,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 12:33:07,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-02-20 12:33:07,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778611717] [2024-02-20 12:33:07,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:33:07,527 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:33:07,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:33:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-20 12:33:07,528 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2024-02-20 12:33:07,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2024-02-20 12:33:07,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:07,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2024-02-20 12:33:07,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:07,681 INFO L124 PetriNetUnfolderBase]: 162/339 cut-off events. [2024-02-20 12:33:07,681 INFO L125 PetriNetUnfolderBase]: For 289/299 co-relation queries the response was YES. [2024-02-20 12:33:07,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 339 events. 162/339 cut-off events. For 289/299 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1359 event pairs, 8 based on Foata normal form. 3/340 useless extension candidates. Maximal degree in co-relation 998. Up to 234 conditions per place. [2024-02-20 12:33:07,687 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 54 selfloop transitions, 10 changer transitions 7/76 dead transitions. [2024-02-20 12:33:07,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 624 flow [2024-02-20 12:33:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:33:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:33:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-02-20 12:33:07,690 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-20 12:33:07,691 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2024-02-20 12:33:07,692 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 76 transitions, 624 flow [2024-02-20 12:33:07,692 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2024-02-20 12:33:07,692 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:07,692 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:07,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:07,905 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:07,905 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:07,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:07,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1207300699, now seen corresponding path program 2 times [2024-02-20 12:33:07,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:07,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468175549] [2024-02-20 12:33:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:07,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468175549] [2024-02-20 12:33:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468175549] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291639627] [2024-02-20 12:33:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:33:08,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:08,079 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) [2024-02-20 12:33:08,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:33:08,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:33:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:08,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-20 12:33:08,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:08,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291639627] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:08,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-02-20 12:33:08,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382003828] [2024-02-20 12:33:08,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:08,388 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-20 12:33:08,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-20 12:33:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-02-20 12:33:08,402 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-02-20 12:33:08,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 76 transitions, 624 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 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) [2024-02-20 12:33:08,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:08,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-02-20 12:33:08,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:08,522 INFO L124 PetriNetUnfolderBase]: 305/571 cut-off events. [2024-02-20 12:33:08,523 INFO L125 PetriNetUnfolderBase]: For 958/962 co-relation queries the response was YES. [2024-02-20 12:33:08,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2465 conditions, 571 events. 305/571 cut-off events. For 958/962 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2442 event pairs, 7 based on Foata normal form. 24/595 useless extension candidates. Maximal degree in co-relation 2240. Up to 382 conditions per place. [2024-02-20 12:33:08,527 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 105 selfloop transitions, 19 changer transitions 22/149 dead transitions. [2024-02-20 12:33:08,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 149 transitions, 1511 flow [2024-02-20 12:33:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 12:33:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 12:33:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-02-20 12:33:08,529 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-02-20 12:33:08,530 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2024-02-20 12:33:08,530 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 149 transitions, 1511 flow [2024-02-20 12:33:08,531 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 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) [2024-02-20 12:33:08,531 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:08,531 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:08,743 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,SelfDestructingSolverStorable3 [2024-02-20 12:33:08,743 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:08,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1455522761, now seen corresponding path program 3 times [2024-02-20 12:33:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468148628] [2024-02-20 12:33:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:08,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:08,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468148628] [2024-02-20 12:33:08,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468148628] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:08,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417451743] [2024-02-20 12:33:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:33:08,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:08,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:08,941 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) [2024-02-20 12:33:09,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:33:09,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:33:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:09,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:09,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:09,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417451743] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:09,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:09,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-20 12:33:09,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607434929] [2024-02-20 12:33:09,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:09,373 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:33:09,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:33:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:33:09,379 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 149 transitions, 1511 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:09,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:09,993 INFO L124 PetriNetUnfolderBase]: 723/1203 cut-off events. [2024-02-20 12:33:09,994 INFO L125 PetriNetUnfolderBase]: For 2490/2490 co-relation queries the response was YES. [2024-02-20 12:33:09,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 1203 events. 723/1203 cut-off events. For 2490/2490 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5129 event pairs, 26 based on Foata normal form. 16/1219 useless extension candidates. Maximal degree in co-relation 5865. Up to 781 conditions per place. [2024-02-20 12:33:10,014 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 186 selfloop transitions, 88 changer transitions 32/307 dead transitions. [2024-02-20 12:33:10,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 307 transitions, 3577 flow [2024-02-20 12:33:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 12:33:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 12:33:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-02-20 12:33:10,034 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-02-20 12:33:10,036 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 30 predicate places. [2024-02-20 12:33:10,036 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 307 transitions, 3577 flow [2024-02-20 12:33:10,036 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:10,037 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:10,037 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:10,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:10,249 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:10,250 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:10,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2106110473, now seen corresponding path program 4 times [2024-02-20 12:33:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063250860] [2024-02-20 12:33:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:10,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:10,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063250860] [2024-02-20 12:33:10,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063250860] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:10,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519381489] [2024-02-20 12:33:10,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:33:10,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:10,429 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) [2024-02-20 12:33:10,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:33:10,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:33:10,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:10,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:33:10,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:10,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:10,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519381489] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:10,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:10,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-02-20 12:33:10,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523204902] [2024-02-20 12:33:10,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:10,736 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:33:10,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:33:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:33:10,766 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 307 transitions, 3577 flow. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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) [2024-02-20 12:33:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:10,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:10,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:11,577 INFO L124 PetriNetUnfolderBase]: 843/1410 cut-off events. [2024-02-20 12:33:11,578 INFO L125 PetriNetUnfolderBase]: For 2761/2761 co-relation queries the response was YES. [2024-02-20 12:33:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8647 conditions, 1410 events. 843/1410 cut-off events. For 2761/2761 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6311 event pairs, 2 based on Foata normal form. 22/1432 useless extension candidates. Maximal degree in co-relation 8274. Up to 930 conditions per place. [2024-02-20 12:33:11,608 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 311 selfloop transitions, 135 changer transitions 83/530 dead transitions. [2024-02-20 12:33:11,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 530 transitions, 6985 flow [2024-02-20 12:33:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 12:33:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 12:33:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 235 transitions. [2024-02-20 12:33:11,611 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3956228956228956 [2024-02-20 12:33:11,612 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 56 predicate places. [2024-02-20 12:33:11,613 INFO L507 AbstractCegarLoop]: Abstraction has has 80 places, 530 transitions, 6985 flow [2024-02-20 12:33:11,613 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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) [2024-02-20 12:33:11,613 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:11,613 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:11,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:11,825 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:11,825 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:11,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1697743633, now seen corresponding path program 5 times [2024-02-20 12:33:11,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:11,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94574279] [2024-02-20 12:33:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:12,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94574279] [2024-02-20 12:33:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94574279] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260723830] [2024-02-20 12:33:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:33:12,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:12,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:12,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:33:12,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:33:12,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:12,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 12:33:12,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:12,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:12,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260723830] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:12,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:12,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2024-02-20 12:33:12,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596466360] [2024-02-20 12:33:12,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:12,412 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 12:33:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 12:33:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-02-20 12:33:12,451 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:12,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 530 transitions, 6985 flow. Second operand has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 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) [2024-02-20 12:33:12,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:12,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:12,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:13,513 INFO L124 PetriNetUnfolderBase]: 1221/2032 cut-off events. [2024-02-20 12:33:13,514 INFO L125 PetriNetUnfolderBase]: For 3823/3823 co-relation queries the response was YES. [2024-02-20 12:33:13,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14418 conditions, 2032 events. 1221/2032 cut-off events. For 3823/3823 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9841 event pairs, 0 based on Foata normal form. 62/2094 useless extension candidates. Maximal degree in co-relation 13992. Up to 1362 conditions per place. [2024-02-20 12:33:13,594 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 464 selfloop transitions, 234 changer transitions 98/797 dead transitions. [2024-02-20 12:33:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 797 transitions, 12009 flow [2024-02-20 12:33:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 12:33:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 12:33:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 238 transitions. [2024-02-20 12:33:13,596 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4006734006734007 [2024-02-20 12:33:13,597 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 82 predicate places. [2024-02-20 12:33:13,598 INFO L507 AbstractCegarLoop]: Abstraction has has 106 places, 797 transitions, 12009 flow [2024-02-20 12:33:13,598 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 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) [2024-02-20 12:33:13,598 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:13,598 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:13,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:13,811 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:13,811 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:13,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:13,812 INFO L85 PathProgramCache]: Analyzing trace with hash -81015863, now seen corresponding path program 6 times [2024-02-20 12:33:13,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:13,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104890300] [2024-02-20 12:33:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104890300] [2024-02-20 12:33:13,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104890300] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:13,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069824203] [2024-02-20 12:33:13,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:33:13,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:13,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:13,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:14,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:33:14,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:33:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:14,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:14,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:14,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:14,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069824203] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:14,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:14,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-20 12:33:14,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076675454] [2024-02-20 12:33:14,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:14,337 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:33:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:14,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:33:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:33:14,350 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:14,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 797 transitions, 12009 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:14,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:14,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:14,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:15,689 INFO L124 PetriNetUnfolderBase]: 1672/2745 cut-off events. [2024-02-20 12:33:15,693 INFO L125 PetriNetUnfolderBase]: For 4811/4811 co-relation queries the response was YES. [2024-02-20 12:33:15,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22310 conditions, 2745 events. 1672/2745 cut-off events. For 4811/4811 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13942 event pairs, 2 based on Foata normal form. 20/2765 useless extension candidates. Maximal degree in co-relation 21831. Up to 1909 conditions per place. [2024-02-20 12:33:15,761 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 675 selfloop transitions, 331 changer transitions 108/1115 dead transitions. [2024-02-20 12:33:15,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 1115 transitions, 18981 flow [2024-02-20 12:33:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-20 12:33:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-20 12:33:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 265 transitions. [2024-02-20 12:33:15,763 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-02-20 12:33:15,765 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 111 predicate places. [2024-02-20 12:33:15,765 INFO L507 AbstractCegarLoop]: Abstraction has has 135 places, 1115 transitions, 18981 flow [2024-02-20 12:33:15,765 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:15,765 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:15,765 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:15,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:15,978 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:15,978 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:15,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1156727019, now seen corresponding path program 7 times [2024-02-20 12:33:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482668213] [2024-02-20 12:33:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:16,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482668213] [2024-02-20 12:33:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482668213] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435028323] [2024-02-20 12:33:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:33:16,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:16,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:16,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:33:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:16,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:16,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:16,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:16,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435028323] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:16,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-20 12:33:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595773649] [2024-02-20 12:33:16,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:16,535 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:33:16,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:33:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:33:16,542 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:16,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 1115 transitions, 18981 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:16,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:16,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:16,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:18,501 INFO L124 PetriNetUnfolderBase]: 1741/2888 cut-off events. [2024-02-20 12:33:18,506 INFO L125 PetriNetUnfolderBase]: For 5067/5067 co-relation queries the response was YES. [2024-02-20 12:33:18,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 2888 events. 1741/2888 cut-off events. For 5067/5067 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15008 event pairs, 2 based on Foata normal form. 62/2950 useless extension candidates. Maximal degree in co-relation 25700. Up to 1962 conditions per place. [2024-02-20 12:33:18,545 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 664 selfloop transitions, 429 changer transitions 125/1219 dead transitions. [2024-02-20 12:33:18,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 1219 transitions, 23156 flow [2024-02-20 12:33:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-02-20 12:33:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-02-20 12:33:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 410 transitions. [2024-02-20 12:33:18,560 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3803339517625232 [2024-02-20 12:33:18,576 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 156 predicate places. [2024-02-20 12:33:18,576 INFO L507 AbstractCegarLoop]: Abstraction has has 180 places, 1219 transitions, 23156 flow [2024-02-20 12:33:18,577 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:18,577 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:18,577 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:18,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:18,777 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:18,778 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:18,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash 45162027, now seen corresponding path program 8 times [2024-02-20 12:33:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857951719] [2024-02-20 12:33:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857951719] [2024-02-20 12:33:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857951719] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271001181] [2024-02-20 12:33:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:33:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:19,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:19,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:33:19,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:33:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:19,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 12:33:19,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:19,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271001181] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:19,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:19,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-02-20 12:33:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060443142] [2024-02-20 12:33:19,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:19,403 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 12:33:19,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:19,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 12:33:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-02-20 12:33:19,438 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:19,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 1219 transitions, 23156 flow. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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) [2024-02-20 12:33:19,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:19,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:19,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:22,220 INFO L124 PetriNetUnfolderBase]: 2703/4502 cut-off events. [2024-02-20 12:33:22,220 INFO L125 PetriNetUnfolderBase]: For 7556/7556 co-relation queries the response was YES. [2024-02-20 12:33:22,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45172 conditions, 4502 events. 2703/4502 cut-off events. For 7556/7556 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25195 event pairs, 2 based on Foata normal form. 58/4560 useless extension candidates. Maximal degree in co-relation 44539. Up to 3376 conditions per place. [2024-02-20 12:33:22,296 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 1200 selfloop transitions, 669 changer transitions 159/2029 dead transitions. [2024-02-20 12:33:22,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 2029 transitions, 42273 flow [2024-02-20 12:33:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-02-20 12:33:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-02-20 12:33:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 389 transitions. [2024-02-20 12:33:22,298 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38438735177865613 [2024-02-20 12:33:22,299 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 201 predicate places. [2024-02-20 12:33:22,299 INFO L507 AbstractCegarLoop]: Abstraction has has 225 places, 2029 transitions, 42273 flow [2024-02-20 12:33:22,299 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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) [2024-02-20 12:33:22,299 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:22,300 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:22,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:22,512 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-20 12:33:22,513 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:22,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1764679817, now seen corresponding path program 9 times [2024-02-20 12:33:22,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:22,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316268047] [2024-02-20 12:33:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:22,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316268047] [2024-02-20 12:33:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316268047] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875050630] [2024-02-20 12:33:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:33:22,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:22,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:22,684 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:33:22,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:33:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:22,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:22,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:22,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875050630] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:23,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:23,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-02-20 12:33:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526280406] [2024-02-20 12:33:23,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:23,034 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 12:33:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 12:33:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-02-20 12:33:23,066 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:23,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 2029 transitions, 42273 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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) [2024-02-20 12:33:23,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:23,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:23,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:26,009 INFO L124 PetriNetUnfolderBase]: 3145/5196 cut-off events. [2024-02-20 12:33:26,009 INFO L125 PetriNetUnfolderBase]: For 8850/8850 co-relation queries the response was YES. [2024-02-20 12:33:26,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57405 conditions, 5196 events. 3145/5196 cut-off events. For 8850/8850 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 29733 event pairs, 2 based on Foata normal form. 16/5212 useless extension candidates. Maximal degree in co-relation 56715. Up to 4070 conditions per place. [2024-02-20 12:33:26,114 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1516 selfloop transitions, 637 changer transitions 184/2338 dead transitions. [2024-02-20 12:33:26,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 2338 transitions, 53367 flow [2024-02-20 12:33:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-20 12:33:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-20 12:33:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 284 transitions. [2024-02-20 12:33:26,118 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36883116883116884 [2024-02-20 12:33:26,118 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 235 predicate places. [2024-02-20 12:33:26,118 INFO L507 AbstractCegarLoop]: Abstraction has has 259 places, 2338 transitions, 53367 flow [2024-02-20 12:33:26,119 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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) [2024-02-20 12:33:26,119 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:26,119 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:26,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:26,332 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:26,332 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:26,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1195314927, now seen corresponding path program 10 times [2024-02-20 12:33:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:26,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606513344] [2024-02-20 12:33:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606513344] [2024-02-20 12:33:26,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606513344] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522965321] [2024-02-20 12:33:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:33:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:26,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:26,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:33:26,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:33:26,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:26,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:33:26,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:26,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:26,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522965321] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:26,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:26,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-02-20 12:33:26,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111522415] [2024-02-20 12:33:26,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:26,891 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:33:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:33:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:33:26,926 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:26,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 2338 transitions, 53367 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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) [2024-02-20 12:33:26,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:26,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:26,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:30,018 INFO L124 PetriNetUnfolderBase]: 3525/5860 cut-off events. [2024-02-20 12:33:30,019 INFO L125 PetriNetUnfolderBase]: For 9962/9962 co-relation queries the response was YES. [2024-02-20 12:33:30,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70550 conditions, 5860 events. 3525/5860 cut-off events. For 9962/9962 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34768 event pairs, 2 based on Foata normal form. 74/5934 useless extension candidates. Maximal degree in co-relation 69691. Up to 4730 conditions per place. [2024-02-20 12:33:30,136 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 1642 selfloop transitions, 763 changer transitions 204/2610 dead transitions. [2024-02-20 12:33:30,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 2610 transitions, 64809 flow [2024-02-20 12:33:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-20 12:33:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-20 12:33:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 293 transitions. [2024-02-20 12:33:30,160 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3917112299465241 [2024-02-20 12:33:30,160 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 266 predicate places. [2024-02-20 12:33:30,160 INFO L507 AbstractCegarLoop]: Abstraction has has 290 places, 2610 transitions, 64809 flow [2024-02-20 12:33:30,161 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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) [2024-02-20 12:33:30,161 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:30,161 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:30,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:30,373 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-20 12:33:30,373 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:30,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2023941213, now seen corresponding path program 11 times [2024-02-20 12:33:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:30,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449114171] [2024-02-20 12:33:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449114171] [2024-02-20 12:33:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449114171] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030096503] [2024-02-20 12:33:30,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:33:30,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:30,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:30,524 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:30,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:33:30,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 12:33:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:30,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:30,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:30,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:30,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030096503] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:30,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:30,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-02-20 12:33:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721412630] [2024-02-20 12:33:30,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:30,856 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 12:33:30,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:30,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 12:33:30,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-02-20 12:33:30,859 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:30,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 2610 transitions, 64809 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2024-02-20 12:33:30,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:30,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:30,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:33,922 INFO L124 PetriNetUnfolderBase]: 3524/5865 cut-off events. [2024-02-20 12:33:33,922 INFO L125 PetriNetUnfolderBase]: For 9506/9506 co-relation queries the response was YES. [2024-02-20 12:33:33,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76489 conditions, 5865 events. 3524/5865 cut-off events. For 9506/9506 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34858 event pairs, 2 based on Foata normal form. 14/5879 useless extension candidates. Maximal degree in co-relation 75565. Up to 4735 conditions per place. [2024-02-20 12:33:34,060 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1743 selfloop transitions, 658 changer transitions 212/2614 dead transitions. [2024-02-20 12:33:34,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 2614 transitions, 70155 flow [2024-02-20 12:33:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 12:33:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 12:33:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 225 transitions. [2024-02-20 12:33:34,063 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-02-20 12:33:34,063 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 287 predicate places. [2024-02-20 12:33:34,063 INFO L507 AbstractCegarLoop]: Abstraction has has 311 places, 2614 transitions, 70155 flow [2024-02-20 12:33:34,064 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2024-02-20 12:33:34,064 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:34,064 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:34,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:34,276 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-20 12:33:34,276 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:34,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 859466535, now seen corresponding path program 12 times [2024-02-20 12:33:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:34,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213362472] [2024-02-20 12:33:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:34,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213362472] [2024-02-20 12:33:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213362472] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036900631] [2024-02-20 12:33:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:33:34,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:34,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:34,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:33:34,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:33:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:34,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:34,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:34,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:34,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036900631] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:34,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:34,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-02-20 12:33:34,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122494776] [2024-02-20 12:33:34,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:34,780 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 12:33:34,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 12:33:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-02-20 12:33:34,811 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:34,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 2614 transitions, 70155 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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) [2024-02-20 12:33:34,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:34,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:34,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:37,900 INFO L124 PetriNetUnfolderBase]: 3745/6181 cut-off events. [2024-02-20 12:33:37,900 INFO L125 PetriNetUnfolderBase]: For 10020/10020 co-relation queries the response was YES. [2024-02-20 12:33:37,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86839 conditions, 6181 events. 3745/6181 cut-off events. For 10020/10020 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 36746 event pairs, 4 based on Foata normal form. 12/6193 useless extension candidates. Maximal degree in co-relation 85946. Up to 5026 conditions per place. [2024-02-20 12:33:37,965 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1969 selfloop transitions, 583 changer transitions 239/2792 dead transitions. [2024-02-20 12:33:37,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 2792 transitions, 80528 flow [2024-02-20 12:33:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 12:33:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 12:33:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 180 transitions. [2024-02-20 12:33:37,966 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-02-20 12:33:37,968 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 307 predicate places. [2024-02-20 12:33:37,968 INFO L507 AbstractCegarLoop]: Abstraction has has 331 places, 2792 transitions, 80528 flow [2024-02-20 12:33:37,969 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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) [2024-02-20 12:33:37,969 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:37,969 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:37,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:38,180 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 12:33:38,181 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:38,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2106341961, now seen corresponding path program 13 times [2024-02-20 12:33:38,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:38,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730616735] [2024-02-20 12:33:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:38,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:38,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:38,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730616735] [2024-02-20 12:33:38,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730616735] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:38,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145367888] [2024-02-20 12:33:38,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:33:38,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:38,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:38,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:38,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 12:33:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:38,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:38,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:38,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145367888] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:38,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:38,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-02-20 12:33:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945254232] [2024-02-20 12:33:38,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:38,739 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 12:33:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 12:33:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-02-20 12:33:38,756 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:38,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 2792 transitions, 80528 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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) [2024-02-20 12:33:38,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:38,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:38,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:41,913 INFO L124 PetriNetUnfolderBase]: 4076/6710 cut-off events. [2024-02-20 12:33:41,913 INFO L125 PetriNetUnfolderBase]: For 10926/10926 co-relation queries the response was YES. [2024-02-20 12:33:41,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101110 conditions, 6710 events. 4076/6710 cut-off events. For 10926/10926 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 40650 event pairs, 4 based on Foata normal form. 20/6730 useless extension candidates. Maximal degree in co-relation 100158. Up to 5539 conditions per place. [2024-02-20 12:33:42,002 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 2546 selfloop transitions, 214 changer transitions 263/3024 dead transitions. [2024-02-20 12:33:42,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 3024 transitions, 93344 flow [2024-02-20 12:33:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 12:33:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 12:33:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2024-02-20 12:33:42,004 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-02-20 12:33:42,004 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 326 predicate places. [2024-02-20 12:33:42,005 INFO L507 AbstractCegarLoop]: Abstraction has has 350 places, 3024 transitions, 93344 flow [2024-02-20 12:33:42,005 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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) [2024-02-20 12:33:42,005 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:42,005 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:42,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:42,217 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 12:33:42,217 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:42,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:42,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1536977071, now seen corresponding path program 14 times [2024-02-20 12:33:42,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:42,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497216348] [2024-02-20 12:33:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:42,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497216348] [2024-02-20 12:33:42,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497216348] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570401538] [2024-02-20 12:33:42,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:33:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:42,393 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:42,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 12:33:42,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:33:42,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:42,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:42,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:42,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:42,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570401538] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:42,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-20 12:33:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734185799] [2024-02-20 12:33:42,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:42,705 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:33:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:33:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:33:42,720 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:42,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 3024 transitions, 93344 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:42,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:42,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:42,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:46,902 INFO L124 PetriNetUnfolderBase]: 4245/6989 cut-off events. [2024-02-20 12:33:46,902 INFO L125 PetriNetUnfolderBase]: For 11841/11841 co-relation queries the response was YES. [2024-02-20 12:33:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112098 conditions, 6989 events. 4245/6989 cut-off events. For 11841/11841 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 42685 event pairs, 6 based on Foata normal form. 102/7091 useless extension candidates. Maximal degree in co-relation 111015. Up to 5884 conditions per place. [2024-02-20 12:33:46,973 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 2126 selfloop transitions, 708 changer transitions 286/3121 dead transitions. [2024-02-20 12:33:46,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 3121 transitions, 102467 flow [2024-02-20 12:33:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 12:33:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 12:33:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 223 transitions. [2024-02-20 12:33:46,976 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40545454545454546 [2024-02-20 12:33:46,977 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 349 predicate places. [2024-02-20 12:33:46,977 INFO L507 AbstractCegarLoop]: Abstraction has has 373 places, 3121 transitions, 102467 flow [2024-02-20 12:33:46,977 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-02-20 12:33:46,977 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:46,977 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:46,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:47,189 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:47,190 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:47,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:47,190 INFO L85 PathProgramCache]: Analyzing trace with hash 403665735, now seen corresponding path program 15 times [2024-02-20 12:33:47,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:47,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738086901] [2024-02-20 12:33:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:47,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:47,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738086901] [2024-02-20 12:33:47,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738086901] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333329242] [2024-02-20 12:33:47,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:33:47,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:47,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:47,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 12:33:47,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:33:47,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:47,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-20 12:33:47,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:33:47,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333329242] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:47,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 11 [2024-02-20 12:33:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80595667] [2024-02-20 12:33:47,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:47,660 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:33:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:33:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:33:47,675 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-02-20 12:33:47,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 3121 transitions, 102467 flow. Second operand has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 12 states have internal predecessors, (98), 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) [2024-02-20 12:33:47,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:47,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-02-20 12:33:47,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:56,650 INFO L124 PetriNetUnfolderBase]: 8959/14735 cut-off events. [2024-02-20 12:33:56,650 INFO L125 PetriNetUnfolderBase]: For 34564/34564 co-relation queries the response was YES. [2024-02-20 12:33:56,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250997 conditions, 14735 events. 8959/14735 cut-off events. For 34564/34564 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 100984 event pairs, 28 based on Foata normal form. 2/14737 useless extension candidates. Maximal degree in co-relation 249193. Up to 12682 conditions per place. [2024-02-20 12:33:56,833 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 3593 selfloop transitions, 1629 changer transitions 812/6288 dead transitions. [2024-02-20 12:33:56,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 6288 transitions, 220581 flow [2024-02-20 12:33:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 12:33:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 12:33:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-02-20 12:33:56,835 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2024-02-20 12:33:56,836 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 357 predicate places. [2024-02-20 12:33:56,836 INFO L507 AbstractCegarLoop]: Abstraction has has 381 places, 6288 transitions, 220581 flow [2024-02-20 12:33:56,837 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 12 states have internal predecessors, (98), 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) [2024-02-20 12:33:56,837 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:56,837 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:56,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-20 12:33:57,048 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-20 12:33:57,050 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:33:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1106124665, now seen corresponding path program 16 times [2024-02-20 12:33:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:57,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219091984] [2024-02-20 12:33:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:57,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:57,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219091984] [2024-02-20 12:33:57,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219091984] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248738065] [2024-02-20 12:33:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:33:57,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:57,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:57,248 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:57,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 12:33:57,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:33:57,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:57,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-20 12:33:57,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:57,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:33:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248738065] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:57,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:57,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 7] total 16 [2024-02-20 12:33:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737303308] [2024-02-20 12:33:57,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:57,550 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 12:33:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 12:33:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-02-20 12:33:57,559 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:33:57,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 6288 transitions, 220581 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 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) [2024-02-20 12:33:57,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:57,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:33:57,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:34:27,319 INFO L124 PetriNetUnfolderBase]: 9329/15355 cut-off events. [2024-02-20 12:34:27,319 INFO L125 PetriNetUnfolderBase]: For 35832/35832 co-relation queries the response was YES. [2024-02-20 12:34:27,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276477 conditions, 15355 events. 9329/15355 cut-off events. For 35832/35832 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 106106 event pairs, 24 based on Foata normal form. 98/15453 useless extension candidates. Maximal degree in co-relation 274574. Up to 13268 conditions per place. [2024-02-20 12:34:27,794 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 4292 selfloop transitions, 1580 changer transitions 859/6732 dead transitions. [2024-02-20 12:34:27,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 6732 transitions, 248210 flow [2024-02-20 12:34:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 12:34:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 12:34:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 187 transitions. [2024-02-20 12:34:27,797 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-20 12:34:27,797 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 373 predicate places. [2024-02-20 12:34:27,797 INFO L507 AbstractCegarLoop]: Abstraction has has 397 places, 6732 transitions, 248210 flow [2024-02-20 12:34:27,797 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 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) [2024-02-20 12:34:27,797 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:34:27,798 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:34:27,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-20 12:34:28,010 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 12:34:28,011 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:34:28,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:34:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1565528127, now seen corresponding path program 17 times [2024-02-20 12:34:28,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:34:28,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721001775] [2024-02-20 12:34:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:34:28,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:34:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:34:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:34:28,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:34:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721001775] [2024-02-20 12:34:28,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721001775] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:34:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665023180] [2024-02-20 12:34:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:34:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:34:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:34:28,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:34:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 12:34:28,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-02-20 12:34:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:34:28,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 12:34:28,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:34:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:34:28,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:34:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:34:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665023180] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:34:28,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:34:28,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2024-02-20 12:34:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391551240] [2024-02-20 12:34:28,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:34:28,642 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 12:34:28,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:34:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 12:34:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-02-20 12:34:28,674 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:34:28,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 6732 transitions, 248210 flow. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 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) [2024-02-20 12:34:28,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:34:28,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:34:28,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:35:25,717 INFO L124 PetriNetUnfolderBase]: 14215/23460 cut-off events. [2024-02-20 12:35:25,717 INFO L125 PetriNetUnfolderBase]: For 53512/53512 co-relation queries the response was YES. [2024-02-20 12:35:25,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445473 conditions, 23460 events. 14215/23460 cut-off events. For 53512/53512 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 171698 event pairs, 0 based on Foata normal form. 126/23586 useless extension candidates. Maximal degree in co-relation 442904. Up to 21015 conditions per place. [2024-02-20 12:35:26,069 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 6113 selfloop transitions, 3814 changer transitions 1208/11136 dead transitions. [2024-02-20 12:35:26,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 11136 transitions, 432294 flow [2024-02-20 12:35:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-02-20 12:35:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-02-20 12:35:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 471 transitions. [2024-02-20 12:35:26,071 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38925619834710745 [2024-02-20 12:35:26,072 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 427 predicate places. [2024-02-20 12:35:26,072 INFO L507 AbstractCegarLoop]: Abstraction has has 451 places, 11136 transitions, 432294 flow [2024-02-20 12:35:26,073 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 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) [2024-02-20 12:35:26,073 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:35:26,073 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:35:26,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-20 12:35:26,285 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:35:26,286 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:35:26,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:35:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2035286067, now seen corresponding path program 18 times [2024-02-20 12:35:26,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:35:26,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407082700] [2024-02-20 12:35:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:35:26,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:35:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:35:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:26,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:35:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407082700] [2024-02-20 12:35:26,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407082700] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:35:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628447920] [2024-02-20 12:35:26,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:35:26,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:35:26,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:35:26,569 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:35:26,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 12:35:26,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:35:26,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:35:26,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-20 12:35:26,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:35:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:26,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:35:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:35:27,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628447920] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:35:27,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:35:27,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2024-02-20 12:35:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444282993] [2024-02-20 12:35:27,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:35:27,066 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:35:27,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:35:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:35:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:35:27,073 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:35:27,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 11136 transitions, 432294 flow. Second operand has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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) [2024-02-20 12:35:27,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:35:27,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:35:27,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:37:36,917 INFO L124 PetriNetUnfolderBase]: 18290/30202 cut-off events. [2024-02-20 12:37:36,918 INFO L125 PetriNetUnfolderBase]: For 68985/68985 co-relation queries the response was YES. [2024-02-20 12:37:36,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602902 conditions, 30202 events. 18290/30202 cut-off events. For 68985/68985 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 227076 event pairs, 0 based on Foata normal form. 190/30392 useless extension candidates. Maximal degree in co-relation 599424. Up to 27611 conditions per place. [2024-02-20 12:37:37,408 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 8035 selfloop transitions, 5040 changer transitions 1251/14327 dead transitions. [2024-02-20 12:37:37,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 14327 transitions, 583603 flow [2024-02-20 12:37:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-02-20 12:37:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-02-20 12:37:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 531 transitions. [2024-02-20 12:37:37,420 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38929618768328444 [2024-02-20 12:37:37,421 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 488 predicate places. [2024-02-20 12:37:37,421 INFO L507 AbstractCegarLoop]: Abstraction has has 512 places, 14327 transitions, 583603 flow [2024-02-20 12:37:37,421 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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) [2024-02-20 12:37:37,421 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:37:37,422 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:37:37,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-20 12:37:37,634 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:37:37,635 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:37:37,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:37:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1500528917, now seen corresponding path program 19 times [2024-02-20 12:37:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:37:37,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877271813] [2024-02-20 12:37:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:37:37,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:37:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:37:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:38,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:37:38,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877271813] [2024-02-20 12:37:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877271813] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:37:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464449822] [2024-02-20 12:37:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:37:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:37:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:37:38,130 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:37:38,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-20 12:37:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:37:38,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-20 12:37:38,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:37:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:38,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:37:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:37:38,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464449822] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:37:38,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:37:38,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2024-02-20 12:37:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031758024] [2024-02-20 12:37:38,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:37:38,570 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:37:38,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:37:38,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:37:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:37:38,582 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:37:38,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 14327 transitions, 583603 flow. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 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) [2024-02-20 12:37:38,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:37:38,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:37:38,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:41:38,965 INFO L124 PetriNetUnfolderBase]: 23512/38761 cut-off events. [2024-02-20 12:41:38,965 INFO L125 PetriNetUnfolderBase]: For 91509/91509 co-relation queries the response was YES. [2024-02-20 12:41:39,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812381 conditions, 38761 events. 23512/38761 cut-off events. For 91509/91509 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 296607 event pairs, 0 based on Foata normal form. 504/39265 useless extension candidates. Maximal degree in co-relation 808233. Up to 36159 conditions per place. [2024-02-20 12:41:39,682 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 10242 selfloop transitions, 7058 changer transitions 1377/18678 dead transitions. [2024-02-20 12:41:39,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 18678 transitions, 797658 flow [2024-02-20 12:41:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-02-20 12:41:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-02-20 12:41:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 712 transitions. [2024-02-20 12:41:39,685 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3995510662177329 [2024-02-20 12:41:39,685 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 568 predicate places. [2024-02-20 12:41:39,685 INFO L507 AbstractCegarLoop]: Abstraction has has 592 places, 18678 transitions, 797658 flow [2024-02-20 12:41:39,685 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 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) [2024-02-20 12:41:39,686 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:41:39,686 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:41:39,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-20 12:41:39,898 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:41:39,899 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:41:39,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:41:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2082969143, now seen corresponding path program 20 times [2024-02-20 12:41:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:41:39,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730566085] [2024-02-20 12:41:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:41:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:41:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:41:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:41:40,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:41:40,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730566085] [2024-02-20 12:41:40,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730566085] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:41:40,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765397812] [2024-02-20 12:41:40,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:41:40,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:41:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:41:40,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:41:40,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-20 12:41:40,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:41:40,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:41:40,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-20 12:41:40,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:41:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:41:40,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:41:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:41:40,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765397812] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:41:40,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:41:40,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2024-02-20 12:41:40,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195751527] [2024-02-20 12:41:40,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:41:40,928 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 12:41:40,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:41:40,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 12:41:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2024-02-20 12:41:40,954 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:41:40,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 18678 transitions, 797658 flow. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 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) [2024-02-20 12:41:40,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:41:40,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:41:40,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:47:32,589 INFO L124 PetriNetUnfolderBase]: 27807/45989 cut-off events. [2024-02-20 12:47:32,589 INFO L125 PetriNetUnfolderBase]: For 108929/108929 co-relation queries the response was YES. [2024-02-20 12:47:32,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009937 conditions, 45989 events. 27807/45989 cut-off events. For 108929/108929 co-relation queries the response was YES. Maximal size of possible extension queue 1371. Compared 362538 event pairs, 0 based on Foata normal form. 232/46221 useless extension candidates. Maximal degree in co-relation 1004835. Up to 43361 conditions per place. [2024-02-20 12:47:33,268 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 11851 selfloop transitions, 9347 changer transitions 1533/22732 dead transitions. [2024-02-20 12:47:33,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 22732 transitions, 1016137 flow [2024-02-20 12:47:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-02-20 12:47:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-02-20 12:47:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 646 transitions. [2024-02-20 12:47:33,270 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39151515151515154 [2024-02-20 12:47:33,270 INFO L308 CegarLoopForPetriNet]: 24 programPoint places, 642 predicate places. [2024-02-20 12:47:33,270 INFO L507 AbstractCegarLoop]: Abstraction has has 666 places, 22732 transitions, 1016137 flow [2024-02-20 12:47:33,270 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 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) [2024-02-20 12:47:33,270 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:47:33,270 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:47:33,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-20 12:47:33,482 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-02-20 12:47:33,482 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:47:33,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:47:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1971552005, now seen corresponding path program 21 times [2024-02-20 12:47:33,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:47:33,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480246368] [2024-02-20 12:47:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:47:33,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:47:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:47:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:47:33,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:47:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480246368] [2024-02-20 12:47:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480246368] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:47:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696682311] [2024-02-20 12:47:33,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:47:33,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:47:33,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:47:33,584 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:47:33,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-20 12:47:33,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-02-20 12:47:33,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:47:33,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-20 12:47:33,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:47:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:47:33,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:47:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:47:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696682311] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:47:33,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:47:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 28 [2024-02-20 12:47:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315687666] [2024-02-20 12:47:33,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:47:33,916 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 12:47:33,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:47:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 12:47:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2024-02-20 12:47:33,923 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-02-20 12:47:33,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 22732 transitions, 1016137 flow. Second operand has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 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) [2024-02-20 12:47:33,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:47:33,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-02-20 12:47:33,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15