./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 22:27:35,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 22:27:35,594 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 22:27:35,597 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 22:27:35,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 22:27:35,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 22:27:35,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 22:27:35,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 22:27:35,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 22:27:35,629 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 22:27:35,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 22:27:35,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 22:27:35,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 22:27:35,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 22:27:35,644 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 22:27:35,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 22:27:35,645 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 22:27:35,645 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 22:27:35,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 22:27:35,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 22:27:35,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 22:27:35,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 22:27:35,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 22:27:35,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 22:27:35,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 22:27:35,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 22:27:35,647 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 22:27:35,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 22:27:35,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 22:27:35,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 22:27:35,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 22:27:35,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:27:35,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 22:27:35,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 22:27:35,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 22:27:35,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 22:27:35,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 22:27:35,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 22:27:35,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 22:27:35,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 22:27:35,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 22:27:35,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 22:27:35,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 22:27:35,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 22:27:35,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 22:27:35,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 22:27:35,866 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 22:27:35,867 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 22:27:35,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-11-22 22:27:36,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 22:27:37,163 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 22:27:37,164 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-11-22 22:27:37,169 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75c9c82f5/15b3d719d39f4097bbbbcdf06cf46309/FLAGd9f704d8b [2023-11-22 22:27:37,178 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75c9c82f5/15b3d719d39f4097bbbbcdf06cf46309 [2023-11-22 22:27:37,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 22:27:37,181 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 22:27:37,182 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 22:27:37,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 22:27:37,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 22:27:37,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38bda00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37, skipping insertion in model container [2023-11-22 22:27:37,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,202 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 22:27:37,331 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-22 22:27:37,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:27:37,346 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 22:27:37,360 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-22 22:27:37,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:27:37,372 INFO L206 MainTranslator]: Completed translation [2023-11-22 22:27:37,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37 WrapperNode [2023-11-22 22:27:37,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 22:27:37,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 22:27:37,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 22:27:37,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 22:27:37,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,398 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2023-11-22 22:27:37,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 22:27:37,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 22:27:37,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 22:27:37,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 22:27:37,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,408 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,416 INFO L189 HeapSplitter]: Split 12 memory accesses to 4 slices as follows [2, 6, 2, 2] [2023-11-22 22:27:37,421 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,421 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,444 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,446 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,447 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,449 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 22:27:37,449 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 22:27:37,449 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 22:27:37,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 22:27:37,450 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (1/1) ... [2023-11-22 22:27:37,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:27:37,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:37,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 22:27:37,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 22:27:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 22:27:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-22 22:27:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-22 22:27:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-22 22:27:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-22 22:27:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 22:27:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 22:27:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 22:27:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 22:27:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 22:27:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 22:27:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 22:27:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 22:27:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 22:27:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 22:27:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 22:27:37,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 22:27:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 22:27:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 22:27:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 22:27:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 22:27:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 22:27:37,549 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 22:27:37,662 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 22:27:37,664 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 22:27:37,899 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 22:27:38,097 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 22:27:38,098 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-22 22:27:38,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:27:38 BoogieIcfgContainer [2023-11-22 22:27:38,098 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 22:27:38,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 22:27:38,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 22:27:38,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 22:27:38,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:27:37" (1/3) ... [2023-11-22 22:27:38,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e4590c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:27:38, skipping insertion in model container [2023-11-22 22:27:38,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:27:37" (2/3) ... [2023-11-22 22:27:38,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e4590c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:27:38, skipping insertion in model container [2023-11-22 22:27:38,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:27:38" (3/3) ... [2023-11-22 22:27:38,105 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-11-22 22:27:38,110 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-22 22:27:38,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 22:27:38,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 22:27:38,118 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 22:27:38,156 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-22 22:27:38,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2023-11-22 22:27:38,236 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-22 22:27:38,238 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 22:27:38,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-22 22:27:38,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2023-11-22 22:27:38,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2023-11-22 22:27:38,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 22:27:38,267 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@728ad4d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 22:27:38,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-22 22:27:38,275 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 22:27:38,281 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-11-22 22:27:38,281 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 22:27:38,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:38,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:38,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:38,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash -28525233, now seen corresponding path program 1 times [2023-11-22 22:27:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:38,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326982846] [2023-11-22 22:27:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:27:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326982846] [2023-11-22 22:27:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326982846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:38,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:38,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 22:27:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133872792] [2023-11-22 22:27:38,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:38,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:27:38,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:27:38,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:27:38,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:38,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-22 22:27:38,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:38,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:38,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:38,917 INFO L124 PetriNetUnfolderBase]: 219/344 cut-off events. [2023-11-22 22:27:38,918 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-22 22:27:38,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 344 events. 219/344 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1216 event pairs, 45 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 596. Up to 221 conditions per place. [2023-11-22 22:27:38,922 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 35 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2023-11-22 22:27:38,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2023-11-22 22:27:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:27:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 22:27:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-22 22:27:38,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-22 22:27:38,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-22 22:27:38,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-22 22:27:38,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:38,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-22 22:27:38,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-22 22:27:38,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 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) [2023-11-22 22:27:38,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 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) [2023-11-22 22:27:38,938 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 55 transitions. [2023-11-22 22:27:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2023-11-22 22:27:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 22:27:38,942 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 75 flow [2023-11-22 22:27:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-11-22 22:27:38,946 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-11-22 22:27:38,947 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 75 flow [2023-11-22 22:27:38,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-22 22:27:38,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:38,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:38,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 22:27:38,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:38,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash 135500589, now seen corresponding path program 1 times [2023-11-22 22:27:38,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:38,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722256919] [2023-11-22 22:27:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:27:39,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:39,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722256919] [2023-11-22 22:27:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722256919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:39,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:39,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:27:39,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849101436] [2023-11-22 22:27:39,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:27:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:27:39,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 22:27:39,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:39,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 75 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) [2023-11-22 22:27:39,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:39,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:39,196 INFO L124 PetriNetUnfolderBase]: 314/520 cut-off events. [2023-11-22 22:27:39,197 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-22 22:27:39,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 520 events. 314/520 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2111 event pairs, 184 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 424. Up to 340 conditions per place. [2023-11-22 22:27:39,200 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 42 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-22 22:27:39,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 224 flow [2023-11-22 22:27:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 22:27:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 22:27:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-22 22:27:39,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-11-22 22:27:39,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-22 22:27:39,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-22 22:27:39,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:39,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-22 22:27:39,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2023-11-22 22:27:39,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,204 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 75 flow. Second operand 5 states and 70 transitions. [2023-11-22 22:27:39,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 224 flow [2023-11-22 22:27:39,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 22:27:39,221 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 108 flow [2023-11-22 22:27:39,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-11-22 22:27:39,222 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-22 22:27:39,222 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 108 flow [2023-11-22 22:27:39,223 INFO L496 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) [2023-11-22 22:27:39,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:39,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:39,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 22:27:39,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:39,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -891589587, now seen corresponding path program 1 times [2023-11-22 22:27:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607394202] [2023-11-22 22:27:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:39,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:27:39,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:39,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607394202] [2023-11-22 22:27:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607394202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:39,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:39,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:27:39,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41166344] [2023-11-22 22:27:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:39,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:27:39,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:27:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 22:27:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:39,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 108 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) [2023-11-22 22:27:39,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:39,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:39,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:39,480 INFO L124 PetriNetUnfolderBase]: 245/408 cut-off events. [2023-11-22 22:27:39,480 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-22 22:27:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 408 events. 245/408 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1573 event pairs, 139 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 769. Up to 340 conditions per place. [2023-11-22 22:27:39,484 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2023-11-22 22:27:39,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 226 flow [2023-11-22 22:27:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 22:27:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 22:27:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-22 22:27:39,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-22 22:27:39,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-22 22:27:39,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-22 22:27:39,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:39,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-22 22:27:39,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-22 22:27:39,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,490 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 108 flow. Second operand 5 states and 66 transitions. [2023-11-22 22:27:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 226 flow [2023-11-22 22:27:39,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-22 22:27:39,493 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 92 flow [2023-11-22 22:27:39,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-22 22:27:39,494 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-11-22 22:27:39,494 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 92 flow [2023-11-22 22:27:39,494 INFO L496 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) [2023-11-22 22:27:39,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:39,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:39,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 22:27:39,495 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:39,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -582652510, now seen corresponding path program 1 times [2023-11-22 22:27:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:39,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489147592] [2023-11-22 22:27:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:39,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:39,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489147592] [2023-11-22 22:27:39,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489147592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:39,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:39,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 22:27:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852688923] [2023-11-22 22:27:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:39,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 22:27:39,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 22:27:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 22:27:39,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:39,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 22:27:39,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:39,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:39,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:39,697 INFO L124 PetriNetUnfolderBase]: 312/517 cut-off events. [2023-11-22 22:27:39,697 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-11-22 22:27:39,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 517 events. 312/517 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2121 event pairs, 184 based on Foata normal form. 18/526 useless extension candidates. Maximal degree in co-relation 1180. Up to 340 conditions per place. [2023-11-22 22:27:39,699 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-22 22:27:39,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 232 flow [2023-11-22 22:27:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 22:27:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 22:27:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-22 22:27:39,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-22 22:27:39,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-22 22:27:39,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-22 22:27:39,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:39,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-22 22:27:39,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-22 22:27:39,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,702 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 92 flow. Second operand 5 states and 66 transitions. [2023-11-22 22:27:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 232 flow [2023-11-22 22:27:39,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 214 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:39,704 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 102 flow [2023-11-22 22:27:39,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-22 22:27:39,704 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-11-22 22:27:39,705 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 102 flow [2023-11-22 22:27:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 22:27:39,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:39,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 22:27:39,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:39,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash -700286942, now seen corresponding path program 1 times [2023-11-22 22:27:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72966711] [2023-11-22 22:27:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:39,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:39,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72966711] [2023-11-22 22:27:39,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72966711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:39,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 22:27:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275374941] [2023-11-22 22:27:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 22:27:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 22:27:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 22:27:39,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:39,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 22:27:39,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:39,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:39,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:39,865 INFO L124 PetriNetUnfolderBase]: 291/486 cut-off events. [2023-11-22 22:27:39,865 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-22 22:27:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 486 events. 291/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1968 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 1072. Up to 254 conditions per place. [2023-11-22 22:27:39,867 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 5 changer transitions 12/57 dead transitions. [2023-11-22 22:27:39,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 276 flow [2023-11-22 22:27:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 22:27:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 22:27:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2023-11-22 22:27:39,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2023-11-22 22:27:39,869 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2023-11-22 22:27:39,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2023-11-22 22:27:39,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:39,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2023-11-22 22:27:39,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2023-11-22 22:27:39,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 22:27:39,870 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 102 flow. Second operand 5 states and 77 transitions. [2023-11-22 22:27:39,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 276 flow [2023-11-22 22:27:39,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 57 transitions, 270 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-22 22:27:39,872 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 113 flow [2023-11-22 22:27:39,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-22 22:27:39,872 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-11-22 22:27:39,872 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 113 flow [2023-11-22 22:27:39,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 22:27:39,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:39,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:39,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 22:27:39,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:39,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1671653826, now seen corresponding path program 1 times [2023-11-22 22:27:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483117545] [2023-11-22 22:27:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:27:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483117545] [2023-11-22 22:27:40,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483117545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218038558] [2023-11-22 22:27:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:40,042 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) [2023-11-22 22:27:40,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 22:27:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:40,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 22:27:40,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:27:40,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:27:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218038558] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:27:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2023-11-22 22:27:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166099460] [2023-11-22 22:27:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 22:27:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 22:27:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:27:40,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:40,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2023-11-22 22:27:40,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:40,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:40,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:40,465 INFO L124 PetriNetUnfolderBase]: 277/464 cut-off events. [2023-11-22 22:27:40,465 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-22 22:27:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 464 events. 277/464 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1786 event pairs, 99 based on Foata normal form. 15/473 useless extension candidates. Maximal degree in co-relation 1120. Up to 231 conditions per place. [2023-11-22 22:27:40,467 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 44 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-22 22:27:40,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 283 flow [2023-11-22 22:27:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-22 22:27:40,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-22 22:27:40,469 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-22 22:27:40,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-22 22:27:40,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:40,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-22 22:27:40,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:27:40,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:40,470 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:40,471 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 113 flow. Second operand 7 states and 86 transitions. [2023-11-22 22:27:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 283 flow [2023-11-22 22:27:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 268 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-22 22:27:40,472 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 134 flow [2023-11-22 22:27:40,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-22 22:27:40,473 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2023-11-22 22:27:40,473 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 134 flow [2023-11-22 22:27:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2023-11-22 22:27:40,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:40,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:40,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:40,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 22:27:40,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:40,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash 441212046, now seen corresponding path program 1 times [2023-11-22 22:27:40,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:40,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106847446] [2023-11-22 22:27:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:40,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106847446] [2023-11-22 22:27:40,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106847446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112590714] [2023-11-22 22:27:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:40,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:40,819 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) [2023-11-22 22:27:40,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 22:27:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:40,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 22:27:40,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:40,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112590714] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:27:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-22 22:27:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610015920] [2023-11-22 22:27:41,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 22:27:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 22:27:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:27:41,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:41,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2023-11-22 22:27:41,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:41,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:41,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:41,168 INFO L124 PetriNetUnfolderBase]: 383/696 cut-off events. [2023-11-22 22:27:41,168 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2023-11-22 22:27:41,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 696 events. 383/696 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3153 event pairs, 153 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1726. Up to 243 conditions per place. [2023-11-22 22:27:41,171 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-22 22:27:41,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 368 flow [2023-11-22 22:27:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-22 22:27:41,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-22 22:27:41,172 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-22 22:27:41,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-22 22:27:41,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:41,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-22 22:27:41,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2023-11-22 22:27:41,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:41,173 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:41,173 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 134 flow. Second operand 7 states and 90 transitions. [2023-11-22 22:27:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 368 flow [2023-11-22 22:27:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-22 22:27:41,175 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 152 flow [2023-11-22 22:27:41,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-22 22:27:41,176 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-22 22:27:41,176 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 152 flow [2023-11-22 22:27:41,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 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) [2023-11-22 22:27:41,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:41,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:41,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:41,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-22 22:27:41,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:41,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash 272603849, now seen corresponding path program 1 times [2023-11-22 22:27:41,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:41,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578441357] [2023-11-22 22:27:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:41,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:41,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:41,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578441357] [2023-11-22 22:27:41,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578441357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:41,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:41,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:41,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018384889] [2023-11-22 22:27:41,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:41,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:41,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:41,779 INFO L124 PetriNetUnfolderBase]: 396/717 cut-off events. [2023-11-22 22:27:41,779 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2023-11-22 22:27:41,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 717 events. 396/717 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3201 event pairs, 117 based on Foata normal form. 6/720 useless extension candidates. Maximal degree in co-relation 1882. Up to 589 conditions per place. [2023-11-22 22:27:41,782 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 42 selfloop transitions, 11 changer transitions 7/63 dead transitions. [2023-11-22 22:27:41,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 359 flow [2023-11-22 22:27:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-22 22:27:41,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-22 22:27:41,783 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-22 22:27:41,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-22 22:27:41,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:41,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-22 22:27:41,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2023-11-22 22:27:41,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:41,784 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:41,784 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 152 flow. Second operand 7 states and 90 transitions. [2023-11-22 22:27:41,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 359 flow [2023-11-22 22:27:41,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 22:27:41,786 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 230 flow [2023-11-22 22:27:41,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-11-22 22:27:41,787 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-11-22 22:27:41,787 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 230 flow [2023-11-22 22:27:41,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:41,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:41,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 22:27:41,787 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:41,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash -119994201, now seen corresponding path program 2 times [2023-11-22 22:27:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:41,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028889748] [2023-11-22 22:27:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:42,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:42,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028889748] [2023-11-22 22:27:42,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028889748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:42,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:42,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431471176] [2023-11-22 22:27:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:42,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:42,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:42,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:42,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:42,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:42,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:42,285 INFO L124 PetriNetUnfolderBase]: 394/714 cut-off events. [2023-11-22 22:27:42,286 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2023-11-22 22:27:42,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 714 events. 394/714 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3221 event pairs, 87 based on Foata normal form. 6/719 useless extension candidates. Maximal degree in co-relation 2194. Up to 589 conditions per place. [2023-11-22 22:27:42,289 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 10 changer transitions 11/68 dead transitions. [2023-11-22 22:27:42,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 453 flow [2023-11-22 22:27:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2023-11-22 22:27:42,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2023-11-22 22:27:42,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 92 transitions. [2023-11-22 22:27:42,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 92 transitions. [2023-11-22 22:27:42,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:42,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 92 transitions. [2023-11-22 22:27:42,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2023-11-22 22:27:42,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:42,291 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:42,291 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 230 flow. Second operand 7 states and 92 transitions. [2023-11-22 22:27:42,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 453 flow [2023-11-22 22:27:42,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 423 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-22 22:27:42,294 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 245 flow [2023-11-22 22:27:42,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-22 22:27:42,294 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-11-22 22:27:42,295 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 245 flow [2023-11-22 22:27:42,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:42,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:42,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:42,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 22:27:42,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:42,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 159985065, now seen corresponding path program 3 times [2023-11-22 22:27:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061555487] [2023-11-22 22:27:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:42,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061555487] [2023-11-22 22:27:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061555487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:42,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:42,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:42,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74236358] [2023-11-22 22:27:42,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:42,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:42,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:42,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:42,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:42,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:42,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:42,747 INFO L124 PetriNetUnfolderBase]: 376/691 cut-off events. [2023-11-22 22:27:42,747 INFO L125 PetriNetUnfolderBase]: For 843/852 co-relation queries the response was YES. [2023-11-22 22:27:42,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2151 conditions, 691 events. 376/691 cut-off events. For 843/852 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3037 event pairs, 153 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 2120. Up to 583 conditions per place. [2023-11-22 22:27:42,751 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 14 changer transitions 11/62 dead transitions. [2023-11-22 22:27:42,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 437 flow [2023-11-22 22:27:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-22 22:27:42,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-22 22:27:42,752 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-22 22:27:42,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-22 22:27:42,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:42,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-22 22:27:42,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:27:42,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:42,754 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:42,754 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 245 flow. Second operand 7 states and 86 transitions. [2023-11-22 22:27:42,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 437 flow [2023-11-22 22:27:42,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 405 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:42,757 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 286 flow [2023-11-22 22:27:42,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-22 22:27:42,758 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-11-22 22:27:42,758 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 286 flow [2023-11-22 22:27:42,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:42,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:42,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:42,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 22:27:42,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:42,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1308181757, now seen corresponding path program 1 times [2023-11-22 22:27:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:42,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610095305] [2023-11-22 22:27:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610095305] [2023-11-22 22:27:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610095305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:43,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:43,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:43,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932747102] [2023-11-22 22:27:43,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:43,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:43,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:43,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:43,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:43,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:43,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:43,151 INFO L124 PetriNetUnfolderBase]: 352/642 cut-off events. [2023-11-22 22:27:43,151 INFO L125 PetriNetUnfolderBase]: For 843/849 co-relation queries the response was YES. [2023-11-22 22:27:43,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 642 events. 352/642 cut-off events. For 843/849 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2699 event pairs, 159 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2024. Up to 583 conditions per place. [2023-11-22 22:27:43,154 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 13 changer transitions 4/55 dead transitions. [2023-11-22 22:27:43,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 427 flow [2023-11-22 22:27:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2023-11-22 22:27:43,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2023-11-22 22:27:43,155 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 76 transitions. [2023-11-22 22:27:43,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 76 transitions. [2023-11-22 22:27:43,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:43,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 76 transitions. [2023-11-22 22:27:43,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2023-11-22 22:27:43,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:43,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:43,157 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 286 flow. Second operand 7 states and 76 transitions. [2023-11-22 22:27:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 427 flow [2023-11-22 22:27:43,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 415 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-22 22:27:43,159 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 309 flow [2023-11-22 22:27:43,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-11-22 22:27:43,160 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2023-11-22 22:27:43,160 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 309 flow [2023-11-22 22:27:43,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:43,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:43,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:43,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 22:27:43,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:43,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash 814749745, now seen corresponding path program 2 times [2023-11-22 22:27:43,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:43,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124921379] [2023-11-22 22:27:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:43,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:43,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:43,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124921379] [2023-11-22 22:27:43,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124921379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:43,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110392458] [2023-11-22 22:27:43,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:27:43,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:43,445 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) [2023-11-22 22:27:43,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 22:27:43,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:27:43,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:43,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 22:27:43,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:43,648 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 22:27:43,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 22:27:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:43,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:43,732 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:27:43,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:27:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:43,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110392458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:43,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:43,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-11-22 22:27:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000855423] [2023-11-22 22:27:43,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:43,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 22:27:43,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 22:27:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:27:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:43,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 309 flow. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 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) [2023-11-22 22:27:43,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:43,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:43,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:43,965 INFO L124 PetriNetUnfolderBase]: 368/665 cut-off events. [2023-11-22 22:27:43,966 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2023-11-22 22:27:43,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 665 events. 368/665 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2837 event pairs, 59 based on Foata normal form. 16/680 useless extension candidates. Maximal degree in co-relation 2120. Up to 423 conditions per place. [2023-11-22 22:27:43,969 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 55 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-11-22 22:27:43,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 548 flow [2023-11-22 22:27:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 22:27:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 22:27:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2023-11-22 22:27:43,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2023-11-22 22:27:43,970 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 102 transitions. [2023-11-22 22:27:43,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 102 transitions. [2023-11-22 22:27:43,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:43,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 102 transitions. [2023-11-22 22:27:43,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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) [2023-11-22 22:27:43,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 22:27:43,971 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 22:27:43,971 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 309 flow. Second operand 8 states and 102 transitions. [2023-11-22 22:27:43,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 548 flow [2023-11-22 22:27:43,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 517 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:43,974 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 320 flow [2023-11-22 22:27:43,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2023-11-22 22:27:43,975 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2023-11-22 22:27:43,975 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 320 flow [2023-11-22 22:27:43,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 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) [2023-11-22 22:27:43,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:43,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:43,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:44,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:44,189 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:44,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash 698164213, now seen corresponding path program 3 times [2023-11-22 22:27:44,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:44,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764495462] [2023-11-22 22:27:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764495462] [2023-11-22 22:27:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764495462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856899551] [2023-11-22 22:27:44,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:27:44,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:44,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:44,420 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) [2023-11-22 22:27:44,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 22:27:44,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 22:27:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:44,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 22:27:44,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:44,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:27:44,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:27:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:44,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:44,669 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:27:44,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:27:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:44,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856899551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:44,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:44,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2023-11-22 22:27:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408095245] [2023-11-22 22:27:44,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 22:27:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 22:27:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-22 22:27:44,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:44,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 320 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 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) [2023-11-22 22:27:44,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:44,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:44,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:44,980 INFO L124 PetriNetUnfolderBase]: 508/939 cut-off events. [2023-11-22 22:27:44,980 INFO L125 PetriNetUnfolderBase]: For 1800/1800 co-relation queries the response was YES. [2023-11-22 22:27:44,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 939 events. 508/939 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4531 event pairs, 121 based on Foata normal form. 24/962 useless extension candidates. Maximal degree in co-relation 3111. Up to 661 conditions per place. [2023-11-22 22:27:44,985 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 74 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2023-11-22 22:27:44,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 721 flow [2023-11-22 22:27:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 22:27:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 22:27:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2023-11-22 22:27:44,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-22 22:27:44,986 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 150 transitions. [2023-11-22 22:27:44,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 150 transitions. [2023-11-22 22:27:44,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:44,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 150 transitions. [2023-11-22 22:27:44,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.5) internal successors, (150), 12 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) [2023-11-22 22:27:44,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 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) [2023-11-22 22:27:44,987 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 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) [2023-11-22 22:27:44,987 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 320 flow. Second operand 12 states and 150 transitions. [2023-11-22 22:27:44,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 721 flow [2023-11-22 22:27:44,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 656 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-22 22:27:44,992 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 416 flow [2023-11-22 22:27:44,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=416, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-22 22:27:44,992 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2023-11-22 22:27:44,993 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 416 flow [2023-11-22 22:27:44,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 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) [2023-11-22 22:27:44,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:44,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:45,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:45,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:45,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1966259215, now seen corresponding path program 4 times [2023-11-22 22:27:45,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:45,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917636052] [2023-11-22 22:27:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:45,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:45,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917636052] [2023-11-22 22:27:45,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917636052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:45,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:45,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781622546] [2023-11-22 22:27:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:45,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:45,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:45,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 416 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:45,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:45,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:45,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:45,797 INFO L124 PetriNetUnfolderBase]: 526/969 cut-off events. [2023-11-22 22:27:45,797 INFO L125 PetriNetUnfolderBase]: For 1939/1939 co-relation queries the response was YES. [2023-11-22 22:27:45,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 969 events. 526/969 cut-off events. For 1939/1939 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4760 event pairs, 177 based on Foata normal form. 12/980 useless extension candidates. Maximal degree in co-relation 3392. Up to 897 conditions per place. [2023-11-22 22:27:45,802 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 53 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2023-11-22 22:27:45,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 608 flow [2023-11-22 22:27:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-22 22:27:45,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-22 22:27:45,817 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-22 22:27:45,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-22 22:27:45,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:45,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-22 22:27:45,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2023-11-22 22:27:45,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:45,817 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:45,818 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 416 flow. Second operand 7 states and 84 transitions. [2023-11-22 22:27:45,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 608 flow [2023-11-22 22:27:45,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 579 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:45,822 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 431 flow [2023-11-22 22:27:45,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-22 22:27:45,822 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2023-11-22 22:27:45,822 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 431 flow [2023-11-22 22:27:45,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:45,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:45,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:45,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-22 22:27:45,823 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:45,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash 595539543, now seen corresponding path program 4 times [2023-11-22 22:27:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:45,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399826630] [2023-11-22 22:27:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:45,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:46,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399826630] [2023-11-22 22:27:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399826630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:46,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:46,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812580395] [2023-11-22 22:27:46,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:46,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:46,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:46,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:46,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:46,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:46,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:46,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:46,189 INFO L124 PetriNetUnfolderBase]: 480/866 cut-off events. [2023-11-22 22:27:46,190 INFO L125 PetriNetUnfolderBase]: For 2025/2025 co-relation queries the response was YES. [2023-11-22 22:27:46,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 866 events. 480/866 cut-off events. For 2025/2025 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3984 event pairs, 167 based on Foata normal form. 4/869 useless extension candidates. Maximal degree in co-relation 3169. Up to 817 conditions per place. [2023-11-22 22:27:46,194 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 48 selfloop transitions, 12 changer transitions 3/66 dead transitions. [2023-11-22 22:27:46,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 563 flow [2023-11-22 22:27:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2023-11-22 22:27:46,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-11-22 22:27:46,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2023-11-22 22:27:46,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2023-11-22 22:27:46,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:46,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2023-11-22 22:27:46,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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) [2023-11-22 22:27:46,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:46,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:46,197 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 431 flow. Second operand 7 states and 79 transitions. [2023-11-22 22:27:46,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 563 flow [2023-11-22 22:27:46,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 537 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:46,201 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 404 flow [2023-11-22 22:27:46,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-11-22 22:27:46,201 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2023-11-22 22:27:46,201 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 404 flow [2023-11-22 22:27:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:46,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:46,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-22 22:27:46,202 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:46,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:46,202 INFO L85 PathProgramCache]: Analyzing trace with hash 421230357, now seen corresponding path program 5 times [2023-11-22 22:27:46,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:46,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046712963] [2023-11-22 22:27:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:46,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046712963] [2023-11-22 22:27:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046712963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971052272] [2023-11-22 22:27:46,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:27:46,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:46,457 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) [2023-11-22 22:27:46,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 22:27:46,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:27:46,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:46,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 22:27:46,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:46,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:27:46,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 22:27:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:46,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:46,721 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:27:46,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:27:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:46,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971052272] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:46,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:27:46,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2023-11-22 22:27:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888945795] [2023-11-22 22:27:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:46,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 22:27:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 22:27:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:27:46,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:46,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-11-22 22:27:46,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:46,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:46,881 INFO L124 PetriNetUnfolderBase]: 454/837 cut-off events. [2023-11-22 22:27:46,881 INFO L125 PetriNetUnfolderBase]: For 1964/1973 co-relation queries the response was YES. [2023-11-22 22:27:46,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 837 events. 454/837 cut-off events. For 1964/1973 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3919 event pairs, 135 based on Foata normal form. 30/865 useless extension candidates. Maximal degree in co-relation 2970. Up to 658 conditions per place. [2023-11-22 22:27:46,885 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 57 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2023-11-22 22:27:46,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 607 flow [2023-11-22 22:27:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 22:27:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 22:27:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2023-11-22 22:27:46,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-11-22 22:27:46,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 81 transitions. [2023-11-22 22:27:46,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 81 transitions. [2023-11-22 22:27:46,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:46,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 81 transitions. [2023-11-22 22:27:46,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2023-11-22 22:27:46,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-22 22:27:46,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-22 22:27:46,888 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 404 flow. Second operand 6 states and 81 transitions. [2023-11-22 22:27:46,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 607 flow [2023-11-22 22:27:46,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 583 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:46,892 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 412 flow [2023-11-22 22:27:46,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=412, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-22 22:27:46,892 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2023-11-22 22:27:46,893 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 412 flow [2023-11-22 22:27:46,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-11-22 22:27:46,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:46,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:46,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:47,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 22:27:47,105 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:47,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:47,105 INFO L85 PathProgramCache]: Analyzing trace with hash -837236101, now seen corresponding path program 5 times [2023-11-22 22:27:47,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:47,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549313839] [2023-11-22 22:27:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:47,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549313839] [2023-11-22 22:27:47,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549313839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:47,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758944611] [2023-11-22 22:27:47,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:27:47,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:47,347 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) [2023-11-22 22:27:47,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 22:27:47,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:27:47,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:47,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 22:27:47,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:47,527 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 22:27:47,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 22:27:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:47,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:47,613 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:27:47,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:27:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758944611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:47,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:47,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-11-22 22:27:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114833028] [2023-11-22 22:27:47,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 22:27:47,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 22:27:47,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:27:47,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:47,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 412 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 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) [2023-11-22 22:27:47,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:47,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:47,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:47,868 INFO L124 PetriNetUnfolderBase]: 472/867 cut-off events. [2023-11-22 22:27:47,868 INFO L125 PetriNetUnfolderBase]: For 2018/2027 co-relation queries the response was YES. [2023-11-22 22:27:47,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 867 events. 472/867 cut-off events. For 2018/2027 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4086 event pairs, 127 based on Foata normal form. 18/883 useless extension candidates. Maximal degree in co-relation 3171. Up to 645 conditions per place. [2023-11-22 22:27:47,873 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 59 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2023-11-22 22:27:47,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 669 flow [2023-11-22 22:27:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 22:27:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 22:27:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2023-11-22 22:27:47,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-22 22:27:47,875 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 98 transitions. [2023-11-22 22:27:47,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 98 transitions. [2023-11-22 22:27:47,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:47,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 98 transitions. [2023-11-22 22:27:47,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.25) internal successors, (98), 8 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) [2023-11-22 22:27:47,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 22:27:47,876 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 22:27:47,877 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 412 flow. Second operand 8 states and 98 transitions. [2023-11-22 22:27:47,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 669 flow [2023-11-22 22:27:47,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 647 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 22:27:47,881 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 438 flow [2023-11-22 22:27:47,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-11-22 22:27:47,882 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-11-22 22:27:47,882 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 438 flow [2023-11-22 22:27:47,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 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) [2023-11-22 22:27:47,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:47,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:47,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:48,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 22:27:48,112 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:48,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -859964759, now seen corresponding path program 6 times [2023-11-22 22:27:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:48,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129983293] [2023-11-22 22:27:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:48,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:48,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:48,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129983293] [2023-11-22 22:27:48,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129983293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:48,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:48,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705145725] [2023-11-22 22:27:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:48,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:48,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:48,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:48,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:48,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:48,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:48,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:48,483 INFO L124 PetriNetUnfolderBase]: 426/764 cut-off events. [2023-11-22 22:27:48,483 INFO L125 PetriNetUnfolderBase]: For 2321/2330 co-relation queries the response was YES. [2023-11-22 22:27:48,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 764 events. 426/764 cut-off events. For 2321/2330 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3372 event pairs, 135 based on Foata normal form. 10/772 useless extension candidates. Maximal degree in co-relation 2953. Up to 723 conditions per place. [2023-11-22 22:27:48,488 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 45 selfloop transitions, 11 changer transitions 3/62 dead transitions. [2023-11-22 22:27:48,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 62 transitions, 553 flow [2023-11-22 22:27:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2023-11-22 22:27:48,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2023-11-22 22:27:48,489 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 75 transitions. [2023-11-22 22:27:48,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 75 transitions. [2023-11-22 22:27:48,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:48,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 75 transitions. [2023-11-22 22:27:48,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2023-11-22 22:27:48,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:48,490 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:48,490 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 438 flow. Second operand 7 states and 75 transitions. [2023-11-22 22:27:48,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 62 transitions, 553 flow [2023-11-22 22:27:48,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 499 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-22 22:27:48,495 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 384 flow [2023-11-22 22:27:48,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-11-22 22:27:48,496 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2023-11-22 22:27:48,496 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 384 flow [2023-11-22 22:27:48,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:48,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:48,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:48,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-22 22:27:48,497 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:48,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash -795919207, now seen corresponding path program 6 times [2023-11-22 22:27:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:48,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964641082] [2023-11-22 22:27:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:48,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:48,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964641082] [2023-11-22 22:27:48,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964641082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:48,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:27:48,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 22:27:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333232567] [2023-11-22 22:27:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:27:48,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:48,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 384 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:48,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:48,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:48,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:48,930 INFO L124 PetriNetUnfolderBase]: 376/668 cut-off events. [2023-11-22 22:27:48,931 INFO L125 PetriNetUnfolderBase]: For 1632/1641 co-relation queries the response was YES. [2023-11-22 22:27:48,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2583 conditions, 668 events. 376/668 cut-off events. For 1632/1641 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2806 event pairs, 105 based on Foata normal form. 18/684 useless extension candidates. Maximal degree in co-relation 2546. Up to 615 conditions per place. [2023-11-22 22:27:48,934 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 50 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-11-22 22:27:48,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 551 flow [2023-11-22 22:27:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2023-11-22 22:27:48,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-11-22 22:27:48,935 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2023-11-22 22:27:48,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2023-11-22 22:27:48,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:48,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2023-11-22 22:27:48,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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) [2023-11-22 22:27:48,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:48,936 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:48,936 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 384 flow. Second operand 7 states and 79 transitions. [2023-11-22 22:27:48,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 551 flow [2023-11-22 22:27:48,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 529 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:48,940 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 390 flow [2023-11-22 22:27:48,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-11-22 22:27:48,941 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2023-11-22 22:27:48,941 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 390 flow [2023-11-22 22:27:48,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 22:27:48,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:48,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:48,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-22 22:27:48,941 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:48,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash 147341554, now seen corresponding path program 1 times [2023-11-22 22:27:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:48,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172722032] [2023-11-22 22:27:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:49,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172722032] [2023-11-22 22:27:49,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172722032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212649755] [2023-11-22 22:27:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:49,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:49,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:49,039 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) [2023-11-22 22:27:49,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 22:27:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:49,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 22:27:49,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:49,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212649755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:49,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-22 22:27:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151394667] [2023-11-22 22:27:49,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:49,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 22:27:49,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 22:27:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:27:49,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:49,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 22:27:49,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:49,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:49,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:49,400 INFO L124 PetriNetUnfolderBase]: 822/1460 cut-off events. [2023-11-22 22:27:49,401 INFO L125 PetriNetUnfolderBase]: For 3564/3573 co-relation queries the response was YES. [2023-11-22 22:27:49,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5267 conditions, 1460 events. 822/1460 cut-off events. For 3564/3573 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7427 event pairs, 108 based on Foata normal form. 14/1472 useless extension candidates. Maximal degree in co-relation 5229. Up to 593 conditions per place. [2023-11-22 22:27:49,413 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 88 selfloop transitions, 20 changer transitions 2/113 dead transitions. [2023-11-22 22:27:49,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 905 flow [2023-11-22 22:27:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2023-11-22 22:27:49,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2023-11-22 22:27:49,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 122 transitions. [2023-11-22 22:27:49,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 122 transitions. [2023-11-22 22:27:49,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:49,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 122 transitions. [2023-11-22 22:27:49,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 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) [2023-11-22 22:27:49,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:49,418 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:49,418 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 390 flow. Second operand 7 states and 122 transitions. [2023-11-22 22:27:49,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 905 flow [2023-11-22 22:27:49,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 881 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 22:27:49,425 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 514 flow [2023-11-22 22:27:49,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-11-22 22:27:49,425 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2023-11-22 22:27:49,426 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 514 flow [2023-11-22 22:27:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 22:27:49,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:49,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:49,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:49,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:49,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:49,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1164924930, now seen corresponding path program 2 times [2023-11-22 22:27:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716372417] [2023-11-22 22:27:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:49,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:49,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:49,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716372417] [2023-11-22 22:27:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716372417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:49,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528508292] [2023-11-22 22:27:49,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:27:49,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:49,729 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) [2023-11-22 22:27:49,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 22:27:49,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:27:49,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:49,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 22:27:49,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:49,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:27:49,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528508292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:49,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:49,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-22 22:27:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307518258] [2023-11-22 22:27:49,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:49,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 22:27:49,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 22:27:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:27:49,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:49,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 22:27:49,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:49,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:49,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:50,139 INFO L124 PetriNetUnfolderBase]: 1290/2284 cut-off events. [2023-11-22 22:27:50,139 INFO L125 PetriNetUnfolderBase]: For 6348/6357 co-relation queries the response was YES. [2023-11-22 22:27:50,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8427 conditions, 2284 events. 1290/2284 cut-off events. For 6348/6357 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12864 event pairs, 364 based on Foata normal form. 14/2295 useless extension candidates. Maximal degree in co-relation 8386. Up to 1465 conditions per place. [2023-11-22 22:27:50,154 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 98 selfloop transitions, 17 changer transitions 2/120 dead transitions. [2023-11-22 22:27:50,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 1048 flow [2023-11-22 22:27:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 22:27:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 22:27:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2023-11-22 22:27:50,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2023-11-22 22:27:50,155 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 118 transitions. [2023-11-22 22:27:50,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 118 transitions. [2023-11-22 22:27:50,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:50,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 118 transitions. [2023-11-22 22:27:50,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2023-11-22 22:27:50,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:50,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 22:27:50,156 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 514 flow. Second operand 7 states and 118 transitions. [2023-11-22 22:27:50,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 1048 flow [2023-11-22 22:27:50,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 1019 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-22 22:27:50,171 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 630 flow [2023-11-22 22:27:50,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-11-22 22:27:50,171 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2023-11-22 22:27:50,172 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 630 flow [2023-11-22 22:27:50,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 22:27:50,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:50,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:50,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:50,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-22 22:27:50,384 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:50,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1903390278, now seen corresponding path program 3 times [2023-11-22 22:27:50,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:50,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718368996] [2023-11-22 22:27:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:50,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718368996] [2023-11-22 22:27:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718368996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965983390] [2023-11-22 22:27:50,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:27:50,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:50,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:50,460 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) [2023-11-22 22:27:50,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 22:27:50,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 22:27:50,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:50,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 22:27:50,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:50,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:50,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965983390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:50,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:50,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-22 22:27:50,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410787098] [2023-11-22 22:27:50,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:50,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 22:27:50,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 22:27:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:27:50,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:50,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 630 flow. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 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) [2023-11-22 22:27:50,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:50,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:50,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:51,213 INFO L124 PetriNetUnfolderBase]: 2551/4630 cut-off events. [2023-11-22 22:27:51,214 INFO L125 PetriNetUnfolderBase]: For 14049/14058 co-relation queries the response was YES. [2023-11-22 22:27:51,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17615 conditions, 4630 events. 2551/4630 cut-off events. For 14049/14058 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30995 event pairs, 1562 based on Foata normal form. 180/4804 useless extension candidates. Maximal degree in co-relation 16580. Up to 2267 conditions per place. [2023-11-22 22:27:51,237 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 185 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2023-11-22 22:27:51,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 227 transitions, 2332 flow [2023-11-22 22:27:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 22:27:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 22:27:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2023-11-22 22:27:51,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-22 22:27:51,238 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 192 transitions. [2023-11-22 22:27:51,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 192 transitions. [2023-11-22 22:27:51,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:51,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 192 transitions. [2023-11-22 22:27:51,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.0) internal successors, (192), 16 states have internal predecessors, (192), 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) [2023-11-22 22:27:51,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:27:51,240 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:27:51,240 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 630 flow. Second operand 16 states and 192 transitions. [2023-11-22 22:27:51,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 227 transitions, 2332 flow [2023-11-22 22:27:51,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 227 transitions, 2219 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-22 22:27:51,276 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 1130 flow [2023-11-22 22:27:51,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1130, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2023-11-22 22:27:51,277 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2023-11-22 22:27:51,277 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 1130 flow [2023-11-22 22:27:51,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 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) [2023-11-22 22:27:51,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:51,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:51,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:51,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:51,489 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:51,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash 558959314, now seen corresponding path program 4 times [2023-11-22 22:27:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:51,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190684037] [2023-11-22 22:27:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:27:51,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190684037] [2023-11-22 22:27:51,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190684037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396688299] [2023-11-22 22:27:51,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:27:51,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:51,576 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) [2023-11-22 22:27:51,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 22:27:51,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:27:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:51,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 22:27:51,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:27:51,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:27:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396688299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:27:51,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:27:51,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2023-11-22 22:27:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327729428] [2023-11-22 22:27:51,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:27:51,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:27:51,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:27:51,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:27:51,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:51,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 1130 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-11-22 22:27:51,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:51,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:51,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:52,431 INFO L124 PetriNetUnfolderBase]: 3157/5888 cut-off events. [2023-11-22 22:27:52,432 INFO L125 PetriNetUnfolderBase]: For 18401/18401 co-relation queries the response was YES. [2023-11-22 22:27:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21720 conditions, 5888 events. 3157/5888 cut-off events. For 18401/18401 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 43215 event pairs, 354 based on Foata normal form. 8/5890 useless extension candidates. Maximal degree in co-relation 20467. Up to 1828 conditions per place. [2023-11-22 22:27:52,471 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 110 selfloop transitions, 69 changer transitions 7/189 dead transitions. [2023-11-22 22:27:52,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1979 flow [2023-11-22 22:27:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 22:27:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 22:27:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2023-11-22 22:27:52,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44482758620689655 [2023-11-22 22:27:52,473 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 129 transitions. [2023-11-22 22:27:52,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 129 transitions. [2023-11-22 22:27:52,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:52,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 129 transitions. [2023-11-22 22:27:52,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 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) [2023-11-22 22:27:52,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 22:27:52,475 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 22:27:52,475 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 1130 flow. Second operand 10 states and 129 transitions. [2023-11-22 22:27:52,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1979 flow [2023-11-22 22:27:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 189 transitions, 1954 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-22 22:27:52,533 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1400 flow [2023-11-22 22:27:52,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1400, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2023-11-22 22:27:52,533 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 86 predicate places. [2023-11-22 22:27:52,533 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1400 flow [2023-11-22 22:27:52,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-11-22 22:27:52,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:52,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:52,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-22 22:27:52,746 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:52,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 432489018, now seen corresponding path program 5 times [2023-11-22 22:27:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238735043] [2023-11-22 22:27:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238735043] [2023-11-22 22:27:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238735043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225490026] [2023-11-22 22:27:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:27:52,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:52,833 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) [2023-11-22 22:27:52,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 22:27:52,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 22:27:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:52,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 22:27:52,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:53,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:27:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225490026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:53,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:53,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-22 22:27:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054055948] [2023-11-22 22:27:53,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 22:27:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 22:27:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-22 22:27:53,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:53,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1400 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:27:53,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:53,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:53,535 INFO L124 PetriNetUnfolderBase]: 1849/3449 cut-off events. [2023-11-22 22:27:53,535 INFO L125 PetriNetUnfolderBase]: For 14828/14834 co-relation queries the response was YES. [2023-11-22 22:27:53,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14828 conditions, 3449 events. 1849/3449 cut-off events. For 14828/14834 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21726 event pairs, 748 based on Foata normal form. 91/3538 useless extension candidates. Maximal degree in co-relation 14666. Up to 2301 conditions per place. [2023-11-22 22:27:53,555 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 74 selfloop transitions, 20 changer transitions 115/212 dead transitions. [2023-11-22 22:27:53,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 212 transitions, 2417 flow [2023-11-22 22:27:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:27:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 22:27:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 188 transitions. [2023-11-22 22:27:53,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432183908045977 [2023-11-22 22:27:53,556 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 188 transitions. [2023-11-22 22:27:53,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 188 transitions. [2023-11-22 22:27:53,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:53,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 188 transitions. [2023-11-22 22:27:53,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.533333333333333) internal successors, (188), 15 states have internal predecessors, (188), 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) [2023-11-22 22:27:53,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:27:53,559 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:27:53,559 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1400 flow. Second operand 15 states and 188 transitions. [2023-11-22 22:27:53,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 212 transitions, 2417 flow [2023-11-22 22:27:53,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 212 transitions, 2206 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-22 22:27:53,592 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 865 flow [2023-11-22 22:27:53,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=865, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2023-11-22 22:27:53,593 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2023-11-22 22:27:53,593 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 865 flow [2023-11-22 22:27:53,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:27:53,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:53,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:53,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:53,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-22 22:27:53,807 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:53,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash -755228349, now seen corresponding path program 6 times [2023-11-22 22:27:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941476738] [2023-11-22 22:27:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:27:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941476738] [2023-11-22 22:27:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941476738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:53,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81404509] [2023-11-22 22:27:53,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:27:53,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:53,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:53,992 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) [2023-11-22 22:27:54,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 22:27:54,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-22 22:27:54,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:27:54,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 22:27:54,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:54,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:54,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81404509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:54,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:54,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2023-11-22 22:27:54,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719031819] [2023-11-22 22:27:54,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:54,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:27:54,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:27:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:27:54,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:54,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 865 flow. Second operand has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 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) [2023-11-22 22:27:54,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:54,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:54,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:54,951 INFO L124 PetriNetUnfolderBase]: 2155/3979 cut-off events. [2023-11-22 22:27:54,951 INFO L125 PetriNetUnfolderBase]: For 19413/19419 co-relation queries the response was YES. [2023-11-22 22:27:54,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17060 conditions, 3979 events. 2155/3979 cut-off events. For 19413/19419 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25799 event pairs, 272 based on Foata normal form. 180/4157 useless extension candidates. Maximal degree in co-relation 17014. Up to 620 conditions per place. [2023-11-22 22:27:54,977 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 165 selfloop transitions, 83 changer transitions 0/251 dead transitions. [2023-11-22 22:27:54,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 251 transitions, 2597 flow [2023-11-22 22:27:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 22:27:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 22:27:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 267 transitions. [2023-11-22 22:27:54,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2023-11-22 22:27:54,978 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 267 transitions. [2023-11-22 22:27:54,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 267 transitions. [2023-11-22 22:27:54,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:54,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 267 transitions. [2023-11-22 22:27:54,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.35) internal successors, (267), 20 states have internal predecessors, (267), 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) [2023-11-22 22:27:54,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 22:27:54,980 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 22:27:54,980 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 865 flow. Second operand 20 states and 267 transitions. [2023-11-22 22:27:54,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 251 transitions, 2597 flow [2023-11-22 22:27:55,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 251 transitions, 2338 flow, removed 118 selfloop flow, removed 12 redundant places. [2023-11-22 22:27:55,030 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1523 flow [2023-11-22 22:27:55,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1523, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2023-11-22 22:27:55,030 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2023-11-22 22:27:55,031 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1523 flow [2023-11-22 22:27:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 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) [2023-11-22 22:27:55,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:55,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:55,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-22 22:27:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-22 22:27:55,234 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:55,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1034694599, now seen corresponding path program 7 times [2023-11-22 22:27:55,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:55,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009510899] [2023-11-22 22:27:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:27:55,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:55,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009510899] [2023-11-22 22:27:55,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009510899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:55,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44510544] [2023-11-22 22:27:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:27:55,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:55,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:55,368 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) [2023-11-22 22:27:55,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 22:27:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:55,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 22:27:55,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:27:55,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:27:55,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44510544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:55,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:55,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-22 22:27:55,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443535060] [2023-11-22 22:27:55,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:27:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:27:55,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:27:55,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:55,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1523 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 22:27:55,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:55,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:55,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:56,218 INFO L124 PetriNetUnfolderBase]: 2145/3942 cut-off events. [2023-11-22 22:27:56,218 INFO L125 PetriNetUnfolderBase]: For 26023/26029 co-relation queries the response was YES. [2023-11-22 22:27:56,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18592 conditions, 3942 events. 2145/3942 cut-off events. For 26023/26029 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25726 event pairs, 562 based on Foata normal form. 54/3994 useless extension candidates. Maximal degree in co-relation 18529. Up to 1892 conditions per place. [2023-11-22 22:27:56,246 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 145 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-11-22 22:27:56,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 2349 flow [2023-11-22 22:27:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 22:27:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-22 22:27:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2023-11-22 22:27:56,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2023-11-22 22:27:56,247 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 122 transitions. [2023-11-22 22:27:56,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 122 transitions. [2023-11-22 22:27:56,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:56,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 122 transitions. [2023-11-22 22:27:56,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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) [2023-11-22 22:27:56,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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) [2023-11-22 22:27:56,248 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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) [2023-11-22 22:27:56,248 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1523 flow. Second operand 11 states and 122 transitions. [2023-11-22 22:27:56,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 2349 flow [2023-11-22 22:27:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 2212 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-11-22 22:27:56,301 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 1448 flow [2023-11-22 22:27:56,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1448, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2023-11-22 22:27:56,302 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2023-11-22 22:27:56,302 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 1448 flow [2023-11-22 22:27:56,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 22:27:56,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:56,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:56,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:56,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 22:27:56,514 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:56,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1043612258, now seen corresponding path program 1 times [2023-11-22 22:27:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:56,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258042156] [2023-11-22 22:27:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:56,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258042156] [2023-11-22 22:27:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258042156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371790162] [2023-11-22 22:27:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:56,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:56,844 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) [2023-11-22 22:27:56,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 22:27:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:56,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:27:56,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:57,084 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 22:27:57,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 22:27:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:57,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:57,181 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:27:57,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:27:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:57,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371790162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:57,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:57,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-22 22:27:57,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617759297] [2023-11-22 22:27:57,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:57,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 22:27:57,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 22:27:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-22 22:27:57,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:57,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 1448 flow. Second operand has 20 states, 20 states have (on average 8.2) internal successors, (164), 20 states have internal predecessors, (164), 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) [2023-11-22 22:27:57,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:57,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:57,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:58,023 INFO L124 PetriNetUnfolderBase]: 2420/4460 cut-off events. [2023-11-22 22:27:58,023 INFO L125 PetriNetUnfolderBase]: For 31936/31942 co-relation queries the response was YES. [2023-11-22 22:27:58,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21856 conditions, 4460 events. 2420/4460 cut-off events. For 31936/31942 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29309 event pairs, 630 based on Foata normal form. 108/4566 useless extension candidates. Maximal degree in co-relation 21792. Up to 2486 conditions per place. [2023-11-22 22:27:58,049 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 192 selfloop transitions, 67 changer transitions 1/263 dead transitions. [2023-11-22 22:27:58,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 263 transitions, 3236 flow [2023-11-22 22:27:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 22:27:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 22:27:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 222 transitions. [2023-11-22 22:27:58,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47844827586206895 [2023-11-22 22:27:58,052 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 222 transitions. [2023-11-22 22:27:58,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 222 transitions. [2023-11-22 22:27:58,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:58,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 222 transitions. [2023-11-22 22:27:58,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.875) internal successors, (222), 16 states have internal predecessors, (222), 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) [2023-11-22 22:27:58,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:27:58,056 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:27:58,056 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 1448 flow. Second operand 16 states and 222 transitions. [2023-11-22 22:27:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 263 transitions, 3236 flow [2023-11-22 22:27:58,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 263 transitions, 3197 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-22 22:27:58,107 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 2003 flow [2023-11-22 22:27:58,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2003, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2023-11-22 22:27:58,108 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2023-11-22 22:27:58,108 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 2003 flow [2023-11-22 22:27:58,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.2) internal successors, (164), 20 states have internal predecessors, (164), 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) [2023-11-22 22:27:58,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:58,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:58,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 22:27:58,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:58,320 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:27:58,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:27:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 453655312, now seen corresponding path program 1 times [2023-11-22 22:27:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:27:58,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637443879] [2023-11-22 22:27:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:27:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:58,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:27:58,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637443879] [2023-11-22 22:27:58,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637443879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:27:58,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897886655] [2023-11-22 22:27:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:27:58,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:27:58,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:27:58,698 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) [2023-11-22 22:27:58,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 22:27:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:27:58,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:27:58,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:27:58,885 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 22:27:58,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 22:27:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:58,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:27:58,969 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:27:58,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:27:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:27:59,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897886655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:27:59,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:27:59,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-11-22 22:27:59,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306762690] [2023-11-22 22:27:59,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:27:59,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:27:59,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:27:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:27:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:27:59,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:27:59,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 2003 flow. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 22:27:59,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:27:59,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:27:59,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:27:59,792 INFO L124 PetriNetUnfolderBase]: 2456/4546 cut-off events. [2023-11-22 22:27:59,792 INFO L125 PetriNetUnfolderBase]: For 41622/41628 co-relation queries the response was YES. [2023-11-22 22:27:59,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24349 conditions, 4546 events. 2456/4546 cut-off events. For 41622/41628 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30229 event pairs, 932 based on Foata normal form. 16/4560 useless extension candidates. Maximal degree in co-relation 24279. Up to 3504 conditions per place. [2023-11-22 22:27:59,823 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 161 selfloop transitions, 34 changer transitions 38/236 dead transitions. [2023-11-22 22:27:59,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 236 transitions, 3017 flow [2023-11-22 22:27:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:27:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 22:27:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 195 transitions. [2023-11-22 22:27:59,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2023-11-22 22:27:59,825 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 195 transitions. [2023-11-22 22:27:59,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 195 transitions. [2023-11-22 22:27:59,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:27:59,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 195 transitions. [2023-11-22 22:27:59,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 13.0) internal successors, (195), 15 states have internal predecessors, (195), 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) [2023-11-22 22:27:59,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:27:59,827 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:27:59,827 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 2003 flow. Second operand 15 states and 195 transitions. [2023-11-22 22:27:59,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 236 transitions, 3017 flow [2023-11-22 22:27:59,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 236 transitions, 2906 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-22 22:27:59,902 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 1896 flow [2023-11-22 22:27:59,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1896, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2023-11-22 22:27:59,902 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 123 predicate places. [2023-11-22 22:27:59,903 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 1896 flow [2023-11-22 22:27:59,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 22:27:59,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:27:59,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:27:59,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:00,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 22:28:00,115 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:00,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1559050236, now seen corresponding path program 2 times [2023-11-22 22:28:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:00,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321388773] [2023-11-22 22:28:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:00,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:00,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321388773] [2023-11-22 22:28:00,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321388773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:00,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212806262] [2023-11-22 22:28:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:28:00,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:00,481 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) [2023-11-22 22:28:00,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 22:28:00,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:28:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:00,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:28:00,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:00,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:00,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:28:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:00,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:00,915 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:00,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212806262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:00,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-22 22:28:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322138760] [2023-11-22 22:28:00,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:00,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:28:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:28:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:28:00,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:00,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 1896 flow. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 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) [2023-11-22 22:28:00,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:00,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:00,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:02,003 INFO L124 PetriNetUnfolderBase]: 2538/4681 cut-off events. [2023-11-22 22:28:02,004 INFO L125 PetriNetUnfolderBase]: For 50405/50405 co-relation queries the response was YES. [2023-11-22 22:28:02,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 4681 events. 2538/4681 cut-off events. For 50405/50405 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 31403 event pairs, 857 based on Foata normal form. 24/4704 useless extension candidates. Maximal degree in co-relation 25930. Up to 3496 conditions per place. [2023-11-22 22:28:02,040 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 178 selfloop transitions, 61 changer transitions 2/244 dead transitions. [2023-11-22 22:28:02,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 244 transitions, 3268 flow [2023-11-22 22:28:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 22:28:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 22:28:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 215 transitions. [2023-11-22 22:28:02,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43610547667342797 [2023-11-22 22:28:02,041 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 215 transitions. [2023-11-22 22:28:02,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 215 transitions. [2023-11-22 22:28:02,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:02,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 215 transitions. [2023-11-22 22:28:02,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.647058823529411) internal successors, (215), 17 states have internal predecessors, (215), 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) [2023-11-22 22:28:02,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 22:28:02,043 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 22:28:02,043 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 1896 flow. Second operand 17 states and 215 transitions. [2023-11-22 22:28:02,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 244 transitions, 3268 flow [2023-11-22 22:28:02,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 244 transitions, 3110 flow, removed 30 selfloop flow, removed 14 redundant places. [2023-11-22 22:28:02,146 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 2303 flow [2023-11-22 22:28:02,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2303, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2023-11-22 22:28:02,148 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 126 predicate places. [2023-11-22 22:28:02,149 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 2303 flow [2023-11-22 22:28:02,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 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) [2023-11-22 22:28:02,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:02,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:02,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:02,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-22 22:28:02,361 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:02,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -86514340, now seen corresponding path program 3 times [2023-11-22 22:28:02,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:02,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431215577] [2023-11-22 22:28:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:02,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:02,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431215577] [2023-11-22 22:28:02,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431215577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:02,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178916674] [2023-11-22 22:28:02,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:28:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:02,659 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) [2023-11-22 22:28:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 22:28:02,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 22:28:02,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:02,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 22:28:02,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:02,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-22 22:28:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:02,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:02,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:02,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:02,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:02,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 22:28:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:02,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 22:28:02,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:02,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:02,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:28:02,894 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 22:28:02,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 22:28:02,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 22:28:02,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 22:28:03,140 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 22:28:03,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 22:28:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:28:03,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:03,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:03,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2023-11-22 22:28:03,547 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-22 22:28:03,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 184 [2023-11-22 22:28:03,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 22:28:03,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 22:28:03,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:03,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2023-11-22 22:28:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:28:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178916674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:03,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:03,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 30 [2023-11-22 22:28:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221766418] [2023-11-22 22:28:03,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:03,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 22:28:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 22:28:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=764, Unknown=10, NotChecked=0, Total=930 [2023-11-22 22:28:03,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:03,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 2303 flow. Second operand has 31 states, 31 states have (on average 7.161290322580645) internal successors, (222), 31 states have internal predecessors, (222), 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) [2023-11-22 22:28:03,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:03,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:05,146 INFO L124 PetriNetUnfolderBase]: 2618/4831 cut-off events. [2023-11-22 22:28:05,146 INFO L125 PetriNetUnfolderBase]: For 58249/58249 co-relation queries the response was YES. [2023-11-22 22:28:05,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27891 conditions, 4831 events. 2618/4831 cut-off events. For 58249/58249 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 32642 event pairs, 1043 based on Foata normal form. 12/4842 useless extension candidates. Maximal degree in co-relation 27816. Up to 4280 conditions per place. [2023-11-22 22:28:05,183 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 183 selfloop transitions, 45 changer transitions 20/251 dead transitions. [2023-11-22 22:28:05,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 251 transitions, 3483 flow [2023-11-22 22:28:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 22:28:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-22 22:28:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 221 transitions. [2023-11-22 22:28:05,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42337164750957856 [2023-11-22 22:28:05,184 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 221 transitions. [2023-11-22 22:28:05,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 221 transitions. [2023-11-22 22:28:05,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:05,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 221 transitions. [2023-11-22 22:28:05,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 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) [2023-11-22 22:28:05,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 22:28:05,186 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 22:28:05,186 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 2303 flow. Second operand 18 states and 221 transitions. [2023-11-22 22:28:05,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 251 transitions, 3483 flow [2023-11-22 22:28:05,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 251 transitions, 3184 flow, removed 113 selfloop flow, removed 10 redundant places. [2023-11-22 22:28:05,312 INFO L231 Difference]: Finished difference. Result has 166 places, 173 transitions, 2372 flow [2023-11-22 22:28:05,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2372, PETRI_PLACES=166, PETRI_TRANSITIONS=173} [2023-11-22 22:28:05,313 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 139 predicate places. [2023-11-22 22:28:05,313 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 173 transitions, 2372 flow [2023-11-22 22:28:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.161290322580645) internal successors, (222), 31 states have internal predecessors, (222), 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) [2023-11-22 22:28:05,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:05,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:05,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:05,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:05,525 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:05,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2086874064, now seen corresponding path program 4 times [2023-11-22 22:28:05,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:05,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727256605] [2023-11-22 22:28:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:05,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727256605] [2023-11-22 22:28:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727256605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433419143] [2023-11-22 22:28:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:28:05,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:05,813 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) [2023-11-22 22:28:05,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 22:28:05,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:28:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:05,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-22 22:28:05,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:05,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 22:28:06,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:06,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 22:28:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:28:06,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:06,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:06,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 22:28:06,308 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:06,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 22:28:06,353 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 22:28:06,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-22 22:28:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:06,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433419143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:06,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:06,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2023-11-22 22:28:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108411080] [2023-11-22 22:28:06,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:06,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 22:28:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 22:28:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-11-22 22:28:06,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:06,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 173 transitions, 2372 flow. Second operand has 24 states, 24 states have (on average 7.416666666666667) internal successors, (178), 24 states have internal predecessors, (178), 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) [2023-11-22 22:28:06,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:06,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:06,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:07,987 INFO L124 PetriNetUnfolderBase]: 2600/4813 cut-off events. [2023-11-22 22:28:07,987 INFO L125 PetriNetUnfolderBase]: For 57978/57978 co-relation queries the response was YES. [2023-11-22 22:28:08,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27555 conditions, 4813 events. 2600/4813 cut-off events. For 57978/57978 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32703 event pairs, 1005 based on Foata normal form. 18/4830 useless extension candidates. Maximal degree in co-relation 27473. Up to 4142 conditions per place. [2023-11-22 22:28:08,022 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 193 selfloop transitions, 58 changer transitions 19/273 dead transitions. [2023-11-22 22:28:08,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 273 transitions, 3615 flow [2023-11-22 22:28:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 22:28:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-22 22:28:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 273 transitions. [2023-11-22 22:28:08,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929535232383807 [2023-11-22 22:28:08,028 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 273 transitions. [2023-11-22 22:28:08,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 273 transitions. [2023-11-22 22:28:08,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:08,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 273 transitions. [2023-11-22 22:28:08,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.869565217391305) internal successors, (273), 23 states have internal predecessors, (273), 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) [2023-11-22 22:28:08,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 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) [2023-11-22 22:28:08,032 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 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) [2023-11-22 22:28:08,032 INFO L175 Difference]: Start difference. First operand has 166 places, 173 transitions, 2372 flow. Second operand 23 states and 273 transitions. [2023-11-22 22:28:08,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 273 transitions, 3615 flow [2023-11-22 22:28:08,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 273 transitions, 3481 flow, removed 34 selfloop flow, removed 13 redundant places. [2023-11-22 22:28:08,147 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 2511 flow [2023-11-22 22:28:08,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2511, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2023-11-22 22:28:08,147 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 148 predicate places. [2023-11-22 22:28:08,147 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 2511 flow [2023-11-22 22:28:08,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.416666666666667) internal successors, (178), 24 states have internal predecessors, (178), 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) [2023-11-22 22:28:08,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:08,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:08,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:08,360 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:08,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1195368334, now seen corresponding path program 2 times [2023-11-22 22:28:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647261022] [2023-11-22 22:28:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:08,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:08,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647261022] [2023-11-22 22:28:08,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647261022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:08,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001903390] [2023-11-22 22:28:08,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:28:08,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:08,577 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) [2023-11-22 22:28:08,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 22:28:08,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:28:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:08,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:28:08,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:08,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:08,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:28:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:08,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:08,929 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:08,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001903390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:08,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 17 [2023-11-22 22:28:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761535798] [2023-11-22 22:28:08,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:08,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:28:08,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:28:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:28:08,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:08,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 2511 flow. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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) [2023-11-22 22:28:08,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:08,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:08,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:10,087 INFO L124 PetriNetUnfolderBase]: 2910/5390 cut-off events. [2023-11-22 22:28:10,087 INFO L125 PetriNetUnfolderBase]: For 69129/69129 co-relation queries the response was YES. [2023-11-22 22:28:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31478 conditions, 5390 events. 2910/5390 cut-off events. For 69129/69129 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 37112 event pairs, 931 based on Foata normal form. 16/5405 useless extension candidates. Maximal degree in co-relation 31397. Up to 3814 conditions per place. [2023-11-22 22:28:10,132 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 208 selfloop transitions, 103 changer transitions 12/326 dead transitions. [2023-11-22 22:28:10,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 326 transitions, 4589 flow [2023-11-22 22:28:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 22:28:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-22 22:28:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 302 transitions. [2023-11-22 22:28:10,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38569604086845466 [2023-11-22 22:28:10,135 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 302 transitions. [2023-11-22 22:28:10,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 302 transitions. [2023-11-22 22:28:10,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:10,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 302 transitions. [2023-11-22 22:28:10,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 11.185185185185185) internal successors, (302), 27 states have internal predecessors, (302), 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) [2023-11-22 22:28:10,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 29.0) internal successors, (812), 28 states have internal predecessors, (812), 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) [2023-11-22 22:28:10,136 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 29.0) internal successors, (812), 28 states have internal predecessors, (812), 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) [2023-11-22 22:28:10,137 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 2511 flow. Second operand 27 states and 302 transitions. [2023-11-22 22:28:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 326 transitions, 4589 flow [2023-11-22 22:28:10,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 326 transitions, 4457 flow, removed 26 selfloop flow, removed 15 redundant places. [2023-11-22 22:28:10,285 INFO L231 Difference]: Finished difference. Result has 188 places, 218 transitions, 3418 flow [2023-11-22 22:28:10,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3418, PETRI_PLACES=188, PETRI_TRANSITIONS=218} [2023-11-22 22:28:10,286 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 161 predicate places. [2023-11-22 22:28:10,286 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 218 transitions, 3418 flow [2023-11-22 22:28:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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) [2023-11-22 22:28:10,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:10,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:10,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:10,498 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:10,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash 11832812, now seen corresponding path program 3 times [2023-11-22 22:28:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057507500] [2023-11-22 22:28:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:10,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:10,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057507500] [2023-11-22 22:28:10,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057507500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203401262] [2023-11-22 22:28:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:28:10,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:10,816 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) [2023-11-22 22:28:10,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 22:28:10,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 22:28:10,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:10,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-22 22:28:10,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:11,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:11,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 22:28:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:28:11,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:11,193 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:11,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203401262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:11,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-22 22:28:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625541205] [2023-11-22 22:28:11,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:28:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:28:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:28:11,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:11,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 218 transitions, 3418 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 22:28:11,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:11,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:11,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:12,798 INFO L124 PetriNetUnfolderBase]: 2980/5524 cut-off events. [2023-11-22 22:28:12,798 INFO L125 PetriNetUnfolderBase]: For 86876/86876 co-relation queries the response was YES. [2023-11-22 22:28:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34113 conditions, 5524 events. 2980/5524 cut-off events. For 86876/86876 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 38311 event pairs, 931 based on Foata normal form. 80/5603 useless extension candidates. Maximal degree in co-relation 34026. Up to 3822 conditions per place. [2023-11-22 22:28:12,836 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 228 selfloop transitions, 118 changer transitions 6/355 dead transitions. [2023-11-22 22:28:12,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 355 transitions, 5237 flow [2023-11-22 22:28:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 22:28:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-22 22:28:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 360 transitions. [2023-11-22 22:28:12,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2023-11-22 22:28:12,838 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 360 transitions. [2023-11-22 22:28:12,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 360 transitions. [2023-11-22 22:28:12,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:12,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 360 transitions. [2023-11-22 22:28:12,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 11.25) internal successors, (360), 32 states have internal predecessors, (360), 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) [2023-11-22 22:28:12,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 29.0) internal successors, (957), 33 states have internal predecessors, (957), 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) [2023-11-22 22:28:12,840 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 29.0) internal successors, (957), 33 states have internal predecessors, (957), 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) [2023-11-22 22:28:12,840 INFO L175 Difference]: Start difference. First operand has 188 places, 218 transitions, 3418 flow. Second operand 32 states and 360 transitions. [2023-11-22 22:28:12,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 355 transitions, 5237 flow [2023-11-22 22:28:12,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 355 transitions, 4927 flow, removed 96 selfloop flow, removed 16 redundant places. [2023-11-22 22:28:13,003 INFO L231 Difference]: Finished difference. Result has 205 places, 232 transitions, 3662 flow [2023-11-22 22:28:13,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3662, PETRI_PLACES=205, PETRI_TRANSITIONS=232} [2023-11-22 22:28:13,003 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 178 predicate places. [2023-11-22 22:28:13,004 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 232 transitions, 3662 flow [2023-11-22 22:28:13,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 22:28:13,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:13,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:13,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-22 22:28:13,208 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:13,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash 946416602, now seen corresponding path program 4 times [2023-11-22 22:28:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:13,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912877057] [2023-11-22 22:28:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:13,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:13,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912877057] [2023-11-22 22:28:13,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912877057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:13,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848105858] [2023-11-22 22:28:13,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:28:13,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:13,422 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) [2023-11-22 22:28:13,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 22:28:13,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:28:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:13,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 22:28:13,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:13,702 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 22:28:13,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 22:28:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:13,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:13,804 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:13,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848105858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:13,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-22 22:28:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502335727] [2023-11-22 22:28:13,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:13,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 22:28:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 22:28:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-22 22:28:13,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:13,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 232 transitions, 3662 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 22:28:13,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:13,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:13,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:15,492 INFO L124 PetriNetUnfolderBase]: 3105/5705 cut-off events. [2023-11-22 22:28:15,493 INFO L125 PetriNetUnfolderBase]: For 111021/111021 co-relation queries the response was YES. [2023-11-22 22:28:15,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36574 conditions, 5705 events. 3105/5705 cut-off events. For 111021/111021 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 39547 event pairs, 657 based on Foata normal form. 174/5878 useless extension candidates. Maximal degree in co-relation 36484. Up to 3344 conditions per place. [2023-11-22 22:28:15,555 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 245 selfloop transitions, 155 changer transitions 6/409 dead transitions. [2023-11-22 22:28:15,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 409 transitions, 6340 flow [2023-11-22 22:28:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 22:28:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-22 22:28:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 375 transitions. [2023-11-22 22:28:15,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-22 22:28:15,561 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 375 transitions. [2023-11-22 22:28:15,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 375 transitions. [2023-11-22 22:28:15,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:15,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 375 transitions. [2023-11-22 22:28:15,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 12.5) internal successors, (375), 30 states have internal predecessors, (375), 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) [2023-11-22 22:28:15,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 29.0) internal successors, (899), 31 states have internal predecessors, (899), 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) [2023-11-22 22:28:15,581 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 29.0) internal successors, (899), 31 states have internal predecessors, (899), 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) [2023-11-22 22:28:15,581 INFO L175 Difference]: Start difference. First operand has 205 places, 232 transitions, 3662 flow. Second operand 30 states and 375 transitions. [2023-11-22 22:28:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 409 transitions, 6340 flow [2023-11-22 22:28:15,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 409 transitions, 6031 flow, removed 24 selfloop flow, removed 23 redundant places. [2023-11-22 22:28:15,827 INFO L231 Difference]: Finished difference. Result has 216 places, 275 transitions, 4603 flow [2023-11-22 22:28:15,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4603, PETRI_PLACES=216, PETRI_TRANSITIONS=275} [2023-11-22 22:28:15,828 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 189 predicate places. [2023-11-22 22:28:15,828 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 275 transitions, 4603 flow [2023-11-22 22:28:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 22:28:15,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:15,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:15,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:16,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-22 22:28:16,041 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:16,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 887066238, now seen corresponding path program 5 times [2023-11-22 22:28:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:16,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508335923] [2023-11-22 22:28:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508335923] [2023-11-22 22:28:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508335923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398592391] [2023-11-22 22:28:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:28:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:16,281 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:16,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 22:28:16,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 22:28:16,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:16,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:28:16,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:16,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:16,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 22:28:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:16,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:16,548 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:28:16,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:28:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398592391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:16,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:16,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 22:28:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972877557] [2023-11-22 22:28:16,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:28:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:28:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:28:16,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 275 transitions, 4603 flow. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 22:28:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:17,858 INFO L124 PetriNetUnfolderBase]: 3262/6013 cut-off events. [2023-11-22 22:28:17,858 INFO L125 PetriNetUnfolderBase]: For 142662/142665 co-relation queries the response was YES. [2023-11-22 22:28:17,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40642 conditions, 6013 events. 3262/6013 cut-off events. For 142662/142665 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42214 event pairs, 1017 based on Foata normal form. 14/6025 useless extension candidates. Maximal degree in co-relation 40546. Up to 4657 conditions per place. [2023-11-22 22:28:17,919 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 256 selfloop transitions, 107 changer transitions 15/381 dead transitions. [2023-11-22 22:28:17,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 381 transitions, 6472 flow [2023-11-22 22:28:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 22:28:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 22:28:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 247 transitions. [2023-11-22 22:28:17,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42586206896551726 [2023-11-22 22:28:17,920 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 247 transitions. [2023-11-22 22:28:17,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 247 transitions. [2023-11-22 22:28:17,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:17,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 247 transitions. [2023-11-22 22:28:17,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 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) [2023-11-22 22:28:17,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 22:28:17,922 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 22:28:17,922 INFO L175 Difference]: Start difference. First operand has 216 places, 275 transitions, 4603 flow. Second operand 20 states and 247 transitions. [2023-11-22 22:28:17,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 381 transitions, 6472 flow [2023-11-22 22:28:18,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 381 transitions, 6072 flow, removed 118 selfloop flow, removed 15 redundant places. [2023-11-22 22:28:18,359 INFO L231 Difference]: Finished difference. Result has 227 places, 305 transitions, 5234 flow [2023-11-22 22:28:18,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5234, PETRI_PLACES=227, PETRI_TRANSITIONS=305} [2023-11-22 22:28:18,360 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 200 predicate places. [2023-11-22 22:28:18,360 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 305 transitions, 5234 flow [2023-11-22 22:28:18,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 22:28:18,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:18,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:18,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:18,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:18,572 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:18,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash 649670272, now seen corresponding path program 5 times [2023-11-22 22:28:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:18,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710405983] [2023-11-22 22:28:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710405983] [2023-11-22 22:28:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710405983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935951908] [2023-11-22 22:28:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:28:18,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:18,841 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:18,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 22:28:18,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 22:28:18,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:18,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:28:18,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:19,050 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 22:28:19,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 22:28:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:19,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:19,116 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:28:19,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:28:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:19,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935951908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:19,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:19,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 22:28:19,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225161995] [2023-11-22 22:28:19,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:19,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:28:19,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:28:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:28:19,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:19,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 305 transitions, 5234 flow. Second operand has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 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) [2023-11-22 22:28:19,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:19,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:19,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:20,404 INFO L124 PetriNetUnfolderBase]: 3254/6001 cut-off events. [2023-11-22 22:28:20,404 INFO L125 PetriNetUnfolderBase]: For 131742/131745 co-relation queries the response was YES. [2023-11-22 22:28:20,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40184 conditions, 6001 events. 3254/6001 cut-off events. For 131742/131745 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42164 event pairs, 1081 based on Foata normal form. 10/6009 useless extension candidates. Maximal degree in co-relation 40084. Up to 4986 conditions per place. [2023-11-22 22:28:20,449 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 258 selfloop transitions, 83 changer transitions 22/366 dead transitions. [2023-11-22 22:28:20,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 366 transitions, 6297 flow [2023-11-22 22:28:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:28:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 22:28:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 194 transitions. [2023-11-22 22:28:20,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459770114942529 [2023-11-22 22:28:20,450 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 194 transitions. [2023-11-22 22:28:20,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 194 transitions. [2023-11-22 22:28:20,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:20,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 194 transitions. [2023-11-22 22:28:20,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.933333333333334) internal successors, (194), 15 states have internal predecessors, (194), 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) [2023-11-22 22:28:20,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:28:20,453 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:28:20,453 INFO L175 Difference]: Start difference. First operand has 227 places, 305 transitions, 5234 flow. Second operand 15 states and 194 transitions. [2023-11-22 22:28:20,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 366 transitions, 6297 flow [2023-11-22 22:28:20,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 366 transitions, 5936 flow, removed 145 selfloop flow, removed 9 redundant places. [2023-11-22 22:28:20,840 INFO L231 Difference]: Finished difference. Result has 233 places, 304 transitions, 5057 flow [2023-11-22 22:28:20,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5057, PETRI_PLACES=233, PETRI_TRANSITIONS=304} [2023-11-22 22:28:20,841 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 206 predicate places. [2023-11-22 22:28:20,841 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 304 transitions, 5057 flow [2023-11-22 22:28:20,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 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) [2023-11-22 22:28:20,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:20,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:20,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:21,055 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:21,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash 600291190, now seen corresponding path program 6 times [2023-11-22 22:28:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:21,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309127644] [2023-11-22 22:28:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:21,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309127644] [2023-11-22 22:28:21,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309127644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098766560] [2023-11-22 22:28:21,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:28:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:21,296 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:21,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 22:28:21,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-22 22:28:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:21,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:28:21,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:21,589 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 22:28:21,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 22:28:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:21,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:21,657 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:28:21,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:28:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 22:28:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098766560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:21,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 20 [2023-11-22 22:28:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522742336] [2023-11-22 22:28:21,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:21,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:28:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:28:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:28:21,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:21,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 304 transitions, 5057 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 22:28:21,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:21,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:21,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:22,874 INFO L124 PetriNetUnfolderBase]: 3168/5831 cut-off events. [2023-11-22 22:28:22,875 INFO L125 PetriNetUnfolderBase]: For 88593/88593 co-relation queries the response was YES. [2023-11-22 22:28:22,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36929 conditions, 5831 events. 3168/5831 cut-off events. For 88593/88593 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 40592 event pairs, 999 based on Foata normal form. 12/5842 useless extension candidates. Maximal degree in co-relation 36828. Up to 4874 conditions per place. [2023-11-22 22:28:22,929 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 257 selfloop transitions, 82 changer transitions 21/363 dead transitions. [2023-11-22 22:28:22,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 6118 flow [2023-11-22 22:28:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 22:28:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 22:28:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 195 transitions. [2023-11-22 22:28:22,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202586206896552 [2023-11-22 22:28:22,931 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 195 transitions. [2023-11-22 22:28:22,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 195 transitions. [2023-11-22 22:28:22,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:22,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 195 transitions. [2023-11-22 22:28:22,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 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) [2023-11-22 22:28:22,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:28:22,932 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:28:22,932 INFO L175 Difference]: Start difference. First operand has 233 places, 304 transitions, 5057 flow. Second operand 16 states and 195 transitions. [2023-11-22 22:28:22,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 6118 flow [2023-11-22 22:28:23,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 363 transitions, 5869 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-11-22 22:28:23,183 INFO L231 Difference]: Finished difference. Result has 234 places, 307 transitions, 5093 flow [2023-11-22 22:28:23,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5093, PETRI_PLACES=234, PETRI_TRANSITIONS=307} [2023-11-22 22:28:23,184 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 207 predicate places. [2023-11-22 22:28:23,184 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 307 transitions, 5093 flow [2023-11-22 22:28:23,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 22:28:23,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:23,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:23,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:23,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-22 22:28:23,396 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:23,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1823859010, now seen corresponding path program 7 times [2023-11-22 22:28:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:23,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671410979] [2023-11-22 22:28:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:23,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:23,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671410979] [2023-11-22 22:28:23,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671410979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:23,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688030525] [2023-11-22 22:28:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:28:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:23,637 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:23,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 22:28:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:23,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:28:23,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:23,875 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 22:28:23,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 22:28:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:23,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:23,958 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:28:23,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:28:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:24,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688030525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:24,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:24,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2023-11-22 22:28:24,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011977524] [2023-11-22 22:28:24,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:24,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:28:24,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:28:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:28:24,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:24,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 307 transitions, 5093 flow. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 22:28:24,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:24,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:24,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:25,240 INFO L124 PetriNetUnfolderBase]: 3452/6332 cut-off events. [2023-11-22 22:28:25,240 INFO L125 PetriNetUnfolderBase]: For 98537/98540 co-relation queries the response was YES. [2023-11-22 22:28:25,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40274 conditions, 6332 events. 3452/6332 cut-off events. For 98537/98540 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 44723 event pairs, 943 based on Foata normal form. 38/6368 useless extension candidates. Maximal degree in co-relation 40174. Up to 4321 conditions per place. [2023-11-22 22:28:25,297 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 278 selfloop transitions, 119 changer transitions 1/401 dead transitions. [2023-11-22 22:28:25,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 401 transitions, 6846 flow [2023-11-22 22:28:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 22:28:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 22:28:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 212 transitions. [2023-11-22 22:28:25,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2023-11-22 22:28:25,298 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 212 transitions. [2023-11-22 22:28:25,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 212 transitions. [2023-11-22 22:28:25,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:25,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 212 transitions. [2023-11-22 22:28:25,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.25) internal successors, (212), 16 states have internal predecessors, (212), 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) [2023-11-22 22:28:25,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:28:25,299 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:28:25,300 INFO L175 Difference]: Start difference. First operand has 234 places, 307 transitions, 5093 flow. Second operand 16 states and 212 transitions. [2023-11-22 22:28:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 401 transitions, 6846 flow [2023-11-22 22:28:25,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 401 transitions, 6686 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-22 22:28:25,570 INFO L231 Difference]: Finished difference. Result has 238 places, 315 transitions, 5406 flow [2023-11-22 22:28:25,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5406, PETRI_PLACES=238, PETRI_TRANSITIONS=315} [2023-11-22 22:28:25,571 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 211 predicate places. [2023-11-22 22:28:25,571 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 315 transitions, 5406 flow [2023-11-22 22:28:25,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 22:28:25,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:25,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:25,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:25,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-22 22:28:25,783 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:25,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2126258226, now seen corresponding path program 6 times [2023-11-22 22:28:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802645992] [2023-11-22 22:28:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:26,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802645992] [2023-11-22 22:28:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802645992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647592041] [2023-11-22 22:28:26,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:28:26,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:26,034 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:26,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 22:28:26,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-22 22:28:26,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:26,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 22:28:26,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:26,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-22 22:28:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:26,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:26,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:26,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 22:28:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:26,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 22:28:26,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:26,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:26,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:28:26,282 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 22:28:26,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 22:28:26,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 22:28:26,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 22:28:26,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:26,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:28:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:28:26,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:26,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:26,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2023-11-22 22:28:26,697 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-22 22:28:26,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 184 [2023-11-22 22:28:26,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 22:28:26,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 22:28:26,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:26,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2023-11-22 22:28:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:28:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647592041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:26,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:26,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 30 [2023-11-22 22:28:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247461543] [2023-11-22 22:28:26,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 22:28:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 22:28:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=747, Unknown=9, NotChecked=0, Total=930 [2023-11-22 22:28:26,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:26,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 315 transitions, 5406 flow. Second operand has 31 states, 31 states have (on average 7.0) internal successors, (217), 31 states have internal predecessors, (217), 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) [2023-11-22 22:28:26,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:26,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:26,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:29,058 INFO L124 PetriNetUnfolderBase]: 3758/6930 cut-off events. [2023-11-22 22:28:29,058 INFO L125 PetriNetUnfolderBase]: For 116002/116005 co-relation queries the response was YES. [2023-11-22 22:28:29,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44945 conditions, 6930 events. 3758/6930 cut-off events. For 116002/116005 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 49466 event pairs, 1165 based on Foata normal form. 26/6954 useless extension candidates. Maximal degree in co-relation 44844. Up to 5756 conditions per place. [2023-11-22 22:28:29,116 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 335 selfloop transitions, 100 changer transitions 8/446 dead transitions. [2023-11-22 22:28:29,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 446 transitions, 7590 flow [2023-11-22 22:28:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 22:28:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-22 22:28:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 291 transitions. [2023-11-22 22:28:29,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013793103448276 [2023-11-22 22:28:29,117 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 291 transitions. [2023-11-22 22:28:29,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 291 transitions. [2023-11-22 22:28:29,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:29,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 291 transitions. [2023-11-22 22:28:29,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.64) internal successors, (291), 25 states have internal predecessors, (291), 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) [2023-11-22 22:28:29,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 22:28:29,119 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 22:28:29,119 INFO L175 Difference]: Start difference. First operand has 238 places, 315 transitions, 5406 flow. Second operand 25 states and 291 transitions. [2023-11-22 22:28:29,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 446 transitions, 7590 flow [2023-11-22 22:28:29,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 446 transitions, 7391 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-11-22 22:28:29,433 INFO L231 Difference]: Finished difference. Result has 259 places, 349 transitions, 6246 flow [2023-11-22 22:28:29,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6246, PETRI_PLACES=259, PETRI_TRANSITIONS=349} [2023-11-22 22:28:29,434 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 232 predicate places. [2023-11-22 22:28:29,434 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 349 transitions, 6246 flow [2023-11-22 22:28:29,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.0) internal successors, (217), 31 states have internal predecessors, (217), 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) [2023-11-22 22:28:29,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:29,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:29,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-22 22:28:29,646 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:29,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2030239526, now seen corresponding path program 8 times [2023-11-22 22:28:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:29,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092642108] [2023-11-22 22:28:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:29,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:29,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092642108] [2023-11-22 22:28:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092642108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:29,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363845435] [2023-11-22 22:28:29,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:28:29,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:29,846 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 22:28:29,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:28:29,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:29,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-22 22:28:29,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:30,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:28:30,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:30,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:28:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:28:30,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:30,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:30,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 22:28:30,320 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:30,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 22:28:30,383 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 22:28:30,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 203 [2023-11-22 22:28:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363845435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:30,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 20 [2023-11-22 22:28:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21892149] [2023-11-22 22:28:30,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:28:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:28:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:28:30,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:30,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 349 transitions, 6246 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 22:28:30,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:30,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:30,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:32,255 INFO L124 PetriNetUnfolderBase]: 3800/7000 cut-off events. [2023-11-22 22:28:32,255 INFO L125 PetriNetUnfolderBase]: For 124563/124566 co-relation queries the response was YES. [2023-11-22 22:28:32,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46557 conditions, 7000 events. 3800/7000 cut-off events. For 124563/124566 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 49660 event pairs, 1241 based on Foata normal form. 38/7036 useless extension candidates. Maximal degree in co-relation 46447. Up to 6151 conditions per place. [2023-11-22 22:28:32,327 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 317 selfloop transitions, 102 changer transitions 1/423 dead transitions. [2023-11-22 22:28:32,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 423 transitions, 7718 flow [2023-11-22 22:28:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 22:28:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-22 22:28:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2023-11-22 22:28:32,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-11-22 22:28:32,328 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 231 transitions. [2023-11-22 22:28:32,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 231 transitions. [2023-11-22 22:28:32,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:32,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 231 transitions. [2023-11-22 22:28:32,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.0) internal successors, (231), 21 states have internal predecessors, (231), 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) [2023-11-22 22:28:32,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 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) [2023-11-22 22:28:32,331 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 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) [2023-11-22 22:28:32,331 INFO L175 Difference]: Start difference. First operand has 259 places, 349 transitions, 6246 flow. Second operand 21 states and 231 transitions. [2023-11-22 22:28:32,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 423 transitions, 7718 flow [2023-11-22 22:28:32,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 423 transitions, 7555 flow, removed 63 selfloop flow, removed 9 redundant places. [2023-11-22 22:28:32,746 INFO L231 Difference]: Finished difference. Result has 271 places, 361 transitions, 6559 flow [2023-11-22 22:28:32,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6559, PETRI_PLACES=271, PETRI_TRANSITIONS=361} [2023-11-22 22:28:32,748 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 244 predicate places. [2023-11-22 22:28:32,748 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 361 transitions, 6559 flow [2023-11-22 22:28:32,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 22:28:32,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:32,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:32,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-22 22:28:32,960 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:32,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 504047724, now seen corresponding path program 7 times [2023-11-22 22:28:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:32,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42529806] [2023-11-22 22:28:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:32,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42529806] [2023-11-22 22:28:33,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42529806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404318182] [2023-11-22 22:28:33,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:28:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:33,235 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:33,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 22:28:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:33,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:28:33,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:33,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:33,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 22:28:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:33,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:33,503 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:28:33,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:28:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:33,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404318182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:33,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:33,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2023-11-22 22:28:33,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215630202] [2023-11-22 22:28:33,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:33,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:28:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:28:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:28:33,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:33,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 361 transitions, 6559 flow. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 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) [2023-11-22 22:28:33,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:33,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:33,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:34,878 INFO L124 PetriNetUnfolderBase]: 3468/6386 cut-off events. [2023-11-22 22:28:34,878 INFO L125 PetriNetUnfolderBase]: For 116529/116532 co-relation queries the response was YES. [2023-11-22 22:28:34,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43155 conditions, 6386 events. 3468/6386 cut-off events. For 116529/116532 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 44317 event pairs, 1023 based on Foata normal form. 122/6506 useless extension candidates. Maximal degree in co-relation 43041. Up to 5259 conditions per place. [2023-11-22 22:28:34,951 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 289 selfloop transitions, 115 changer transitions 3/410 dead transitions. [2023-11-22 22:28:34,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 410 transitions, 7615 flow [2023-11-22 22:28:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 22:28:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 22:28:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 208 transitions. [2023-11-22 22:28:34,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42190669371196754 [2023-11-22 22:28:34,953 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 208 transitions. [2023-11-22 22:28:34,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 208 transitions. [2023-11-22 22:28:34,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:34,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 208 transitions. [2023-11-22 22:28:34,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.235294117647058) internal successors, (208), 17 states have internal predecessors, (208), 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) [2023-11-22 22:28:34,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 22:28:34,954 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 22:28:34,954 INFO L175 Difference]: Start difference. First operand has 271 places, 361 transitions, 6559 flow. Second operand 17 states and 208 transitions. [2023-11-22 22:28:34,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 410 transitions, 7615 flow [2023-11-22 22:28:35,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 410 transitions, 7373 flow, removed 21 selfloop flow, removed 22 redundant places. [2023-11-22 22:28:35,360 INFO L231 Difference]: Finished difference. Result has 264 places, 349 transitions, 6422 flow [2023-11-22 22:28:35,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6422, PETRI_PLACES=264, PETRI_TRANSITIONS=349} [2023-11-22 22:28:35,360 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 237 predicate places. [2023-11-22 22:28:35,360 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 349 transitions, 6422 flow [2023-11-22 22:28:35,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 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) [2023-11-22 22:28:35,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:35,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:35,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:35,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:35,572 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:35,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1952361928, now seen corresponding path program 9 times [2023-11-22 22:28:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:35,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962701185] [2023-11-22 22:28:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962701185] [2023-11-22 22:28:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962701185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999082780] [2023-11-22 22:28:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:28:35,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:35,816 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:35,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 22:28:35,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 22:28:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:35,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-22 22:28:35,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:36,199 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 22:28:36,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 22:28:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:28:36,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:36,281 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:36,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:36,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999082780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:36,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 22 [2023-11-22 22:28:36,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009012495] [2023-11-22 22:28:36,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 22:28:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 22:28:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-22 22:28:36,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:36,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 349 transitions, 6422 flow. Second operand has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 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) [2023-11-22 22:28:36,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:36,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:36,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:37,762 INFO L124 PetriNetUnfolderBase]: 3836/7078 cut-off events. [2023-11-22 22:28:37,762 INFO L125 PetriNetUnfolderBase]: For 126738/126741 co-relation queries the response was YES. [2023-11-22 22:28:37,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47771 conditions, 7078 events. 3836/7078 cut-off events. For 126738/126741 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50264 event pairs, 966 based on Foata normal form. 26/7102 useless extension candidates. Maximal degree in co-relation 47664. Up to 5098 conditions per place. [2023-11-22 22:28:37,847 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 421 selfloop transitions, 56 changer transitions 1/481 dead transitions. [2023-11-22 22:28:37,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 481 transitions, 9075 flow [2023-11-22 22:28:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 22:28:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-22 22:28:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 229 transitions. [2023-11-22 22:28:37,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386973180076628 [2023-11-22 22:28:37,849 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 229 transitions. [2023-11-22 22:28:37,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 229 transitions. [2023-11-22 22:28:37,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:37,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 229 transitions. [2023-11-22 22:28:37,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 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) [2023-11-22 22:28:37,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 22:28:37,850 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 22:28:37,850 INFO L175 Difference]: Start difference. First operand has 264 places, 349 transitions, 6422 flow. Second operand 18 states and 229 transitions. [2023-11-22 22:28:37,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 481 transitions, 9075 flow [2023-11-22 22:28:38,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 481 transitions, 8890 flow, removed 3 selfloop flow, removed 14 redundant places. [2023-11-22 22:28:38,334 INFO L231 Difference]: Finished difference. Result has 273 places, 365 transitions, 6716 flow [2023-11-22 22:28:38,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6716, PETRI_PLACES=273, PETRI_TRANSITIONS=365} [2023-11-22 22:28:38,334 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 246 predicate places. [2023-11-22 22:28:38,335 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 365 transitions, 6716 flow [2023-11-22 22:28:38,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 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) [2023-11-22 22:28:38,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:38,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:38,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:38,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:38,547 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:38,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1700565130, now seen corresponding path program 8 times [2023-11-22 22:28:38,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:38,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597905764] [2023-11-22 22:28:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:38,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:38,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597905764] [2023-11-22 22:28:38,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597905764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528188678] [2023-11-22 22:28:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:28:38,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:38,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:38,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 22:28:38,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:28:38,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:38,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:28:38,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:39,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 22:28:39,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 22:28:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:39,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:39,142 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:39,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:39,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528188678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:39,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:39,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 18 [2023-11-22 22:28:39,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762913613] [2023-11-22 22:28:39,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:28:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:39,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:28:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:28:39,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:39,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 365 transitions, 6716 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:28:39,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:39,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:39,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:40,683 INFO L124 PetriNetUnfolderBase]: 3874/7171 cut-off events. [2023-11-22 22:28:40,684 INFO L125 PetriNetUnfolderBase]: For 143860/143863 co-relation queries the response was YES. [2023-11-22 22:28:40,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49572 conditions, 7171 events. 3874/7171 cut-off events. For 143860/143863 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 51345 event pairs, 1140 based on Foata normal form. 10/7179 useless extension candidates. Maximal degree in co-relation 49456. Up to 6084 conditions per place. [2023-11-22 22:28:40,777 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 371 selfloop transitions, 40 changer transitions 32/446 dead transitions. [2023-11-22 22:28:40,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 446 transitions, 8413 flow [2023-11-22 22:28:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 22:28:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 22:28:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2023-11-22 22:28:40,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-22 22:28:40,779 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 196 transitions. [2023-11-22 22:28:40,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 196 transitions. [2023-11-22 22:28:40,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:40,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 196 transitions. [2023-11-22 22:28:40,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.25) internal successors, (196), 16 states have internal predecessors, (196), 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) [2023-11-22 22:28:40,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:28:40,780 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 22:28:40,780 INFO L175 Difference]: Start difference. First operand has 273 places, 365 transitions, 6716 flow. Second operand 16 states and 196 transitions. [2023-11-22 22:28:40,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 446 transitions, 8413 flow [2023-11-22 22:28:41,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 446 transitions, 8207 flow, removed 64 selfloop flow, removed 9 redundant places. [2023-11-22 22:28:41,473 INFO L231 Difference]: Finished difference. Result has 283 places, 360 transitions, 6539 flow [2023-11-22 22:28:41,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6539, PETRI_PLACES=283, PETRI_TRANSITIONS=360} [2023-11-22 22:28:41,475 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 256 predicate places. [2023-11-22 22:28:41,475 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 360 transitions, 6539 flow [2023-11-22 22:28:41,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:28:41,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:41,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:41,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:41,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-22 22:28:41,680 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:41,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash -737976984, now seen corresponding path program 9 times [2023-11-22 22:28:41,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:41,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603891150] [2023-11-22 22:28:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:41,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:41,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603891150] [2023-11-22 22:28:41,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603891150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:41,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358980032] [2023-11-22 22:28:41,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:28:41,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:41,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:41,932 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:41,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 22:28:42,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 22:28:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:42,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-22 22:28:42,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:42,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-22 22:28:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:42,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 22:28:42,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:42,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 22:28:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:42,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:42,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 22:28:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 22:28:42,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 22:28:42,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:28:42,197 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 22:28:42,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 22:28:42,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 22:28:42,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 22:28:42,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-11-22 22:28:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:28:42,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:44,826 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2023-11-22 22:28:44,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2023-11-22 22:28:45,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:45,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-11-22 22:28:45,196 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:45,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 79 [2023-11-22 22:28:45,241 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2023-11-22 22:28:45,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 82 [2023-11-22 22:28:45,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:45,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2023-11-22 22:28:45,285 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:45,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2023-11-22 22:28:45,325 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2023-11-22 22:28:45,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 89 [2023-11-22 22:28:45,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:45,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2023-11-22 22:28:45,385 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:45,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 70 [2023-11-22 22:28:45,425 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2023-11-22 22:28:45,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2023-11-22 22:28:45,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:45,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2023-11-22 22:28:45,486 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:45,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 109 [2023-11-22 22:28:45,558 INFO L349 Elim1Store]: treesize reduction 16, result has 84.8 percent of original size [2023-11-22 22:28:45,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 137 [2023-11-22 22:28:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:28:45,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358980032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:45,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:45,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 34 [2023-11-22 22:28:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938869868] [2023-11-22 22:28:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:45,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-22 22:28:45,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-22 22:28:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=915, Unknown=5, NotChecked=0, Total=1190 [2023-11-22 22:28:45,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:45,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 360 transitions, 6539 flow. Second operand has 35 states, 35 states have (on average 6.9714285714285715) internal successors, (244), 35 states have internal predecessors, (244), 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) [2023-11-22 22:28:45,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:45,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:45,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:49,242 INFO L124 PetriNetUnfolderBase]: 5379/9903 cut-off events. [2023-11-22 22:28:49,242 INFO L125 PetriNetUnfolderBase]: For 228335/228338 co-relation queries the response was YES. [2023-11-22 22:28:49,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 9903 events. 5379/9903 cut-off events. For 228335/228338 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 75168 event pairs, 1298 based on Foata normal form. 75/9976 useless extension candidates. Maximal degree in co-relation 67636. Up to 6874 conditions per place. [2023-11-22 22:28:49,599 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 499 selfloop transitions, 161 changer transitions 3/666 dead transitions. [2023-11-22 22:28:49,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 666 transitions, 12085 flow [2023-11-22 22:28:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-22 22:28:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-22 22:28:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 449 transitions. [2023-11-22 22:28:49,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418452935694315 [2023-11-22 22:28:49,611 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 449 transitions. [2023-11-22 22:28:49,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 449 transitions. [2023-11-22 22:28:49,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:49,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 449 transitions. [2023-11-22 22:28:49,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 12.135135135135135) internal successors, (449), 37 states have internal predecessors, (449), 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) [2023-11-22 22:28:49,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 29.0) internal successors, (1102), 38 states have internal predecessors, (1102), 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) [2023-11-22 22:28:49,613 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 29.0) internal successors, (1102), 38 states have internal predecessors, (1102), 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) [2023-11-22 22:28:49,614 INFO L175 Difference]: Start difference. First operand has 283 places, 360 transitions, 6539 flow. Second operand 37 states and 449 transitions. [2023-11-22 22:28:49,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 666 transitions, 12085 flow [2023-11-22 22:28:50,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 666 transitions, 11825 flow, removed 53 selfloop flow, removed 13 redundant places. [2023-11-22 22:28:50,561 INFO L231 Difference]: Finished difference. Result has 319 places, 491 transitions, 9434 flow [2023-11-22 22:28:50,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9434, PETRI_PLACES=319, PETRI_TRANSITIONS=491} [2023-11-22 22:28:50,562 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 292 predicate places. [2023-11-22 22:28:50,562 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 491 transitions, 9434 flow [2023-11-22 22:28:50,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.9714285714285715) internal successors, (244), 35 states have internal predecessors, (244), 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) [2023-11-22 22:28:50,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:50,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:50,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-22 22:28:50,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:50,774 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:50,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 131389324, now seen corresponding path program 10 times [2023-11-22 22:28:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:50,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547377704] [2023-11-22 22:28:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:51,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547377704] [2023-11-22 22:28:51,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547377704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704823563] [2023-11-22 22:28:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:28:51,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:51,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:51,014 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:51,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-22 22:28:51,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:28:51,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:51,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 22:28:51,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:51,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:51,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 22:28:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:51,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:51,365 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:28:51,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:28:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704823563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:51,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2023-11-22 22:28:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766341753] [2023-11-22 22:28:51,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:51,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:28:51,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:28:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:28:51,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:51,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 491 transitions, 9434 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 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) [2023-11-22 22:28:51,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:51,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:51,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:28:54,426 INFO L124 PetriNetUnfolderBase]: 5578/10284 cut-off events. [2023-11-22 22:28:54,426 INFO L125 PetriNetUnfolderBase]: For 323586/323589 co-relation queries the response was YES. [2023-11-22 22:28:54,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77493 conditions, 10284 events. 5578/10284 cut-off events. For 323586/323589 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78570 event pairs, 1636 based on Foata normal form. 32/10312 useless extension candidates. Maximal degree in co-relation 76496. Up to 8330 conditions per place. [2023-11-22 22:28:54,541 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 493 selfloop transitions, 135 changer transitions 20/651 dead transitions. [2023-11-22 22:28:54,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 651 transitions, 13082 flow [2023-11-22 22:28:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 22:28:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-22 22:28:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 298 transitions. [2023-11-22 22:28:54,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110344827586207 [2023-11-22 22:28:54,542 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 298 transitions. [2023-11-22 22:28:54,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 298 transitions. [2023-11-22 22:28:54,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:28:54,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 298 transitions. [2023-11-22 22:28:54,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.92) internal successors, (298), 25 states have internal predecessors, (298), 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) [2023-11-22 22:28:54,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 22:28:54,544 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 22:28:54,544 INFO L175 Difference]: Start difference. First operand has 319 places, 491 transitions, 9434 flow. Second operand 25 states and 298 transitions. [2023-11-22 22:28:54,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 651 transitions, 13082 flow [2023-11-22 22:28:55,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 651 transitions, 12018 flow, removed 501 selfloop flow, removed 7 redundant places. [2023-11-22 22:28:55,904 INFO L231 Difference]: Finished difference. Result has 344 places, 533 transitions, 9983 flow [2023-11-22 22:28:55,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9983, PETRI_PLACES=344, PETRI_TRANSITIONS=533} [2023-11-22 22:28:55,909 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 317 predicate places. [2023-11-22 22:28:55,910 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 533 transitions, 9983 flow [2023-11-22 22:28:55,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 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) [2023-11-22 22:28:55,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:28:55,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:28:55,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-22 22:28:56,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:56,112 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:28:56,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:28:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash -458636452, now seen corresponding path program 10 times [2023-11-22 22:28:56,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:28:56,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645580719] [2023-11-22 22:28:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:28:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:28:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:28:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:28:56,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:28:56,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645580719] [2023-11-22 22:28:56,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645580719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:28:56,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693691445] [2023-11-22 22:28:56,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:28:56,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:28:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:28:56,369 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:28:56,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-22 22:28:56,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:28:56,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:28:56,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-22 22:28:56,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:28:56,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 22:28:56,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:56,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 22:28:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:28:56,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:28:56,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:28:56,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 22:28:56,876 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:28:56,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 22:28:56,921 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 22:28:56,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-22 22:28:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:28:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693691445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:28:57,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:28:57,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2023-11-22 22:28:57,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388629626] [2023-11-22 22:28:57,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:28:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 22:28:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:28:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 22:28:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-22 22:28:57,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:28:57,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 533 transitions, 9983 flow. Second operand has 23 states, 23 states have (on average 7.391304347826087) internal successors, (170), 23 states have internal predecessors, (170), 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) [2023-11-22 22:28:57,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:28:57,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:28:57,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:00,576 INFO L124 PetriNetUnfolderBase]: 5728/10581 cut-off events. [2023-11-22 22:29:00,577 INFO L125 PetriNetUnfolderBase]: For 339228/339231 co-relation queries the response was YES. [2023-11-22 22:29:00,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79295 conditions, 10581 events. 5728/10581 cut-off events. For 339228/339231 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 81406 event pairs, 1942 based on Foata normal form. 18/10595 useless extension candidates. Maximal degree in co-relation 79151. Up to 9396 conditions per place. [2023-11-22 22:29:00,694 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 522 selfloop transitions, 110 changer transitions 15/650 dead transitions. [2023-11-22 22:29:00,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 650 transitions, 12692 flow [2023-11-22 22:29:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 22:29:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-22 22:29:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 282 transitions. [2023-11-22 22:29:00,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2023-11-22 22:29:00,696 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 282 transitions. [2023-11-22 22:29:00,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 282 transitions. [2023-11-22 22:29:00,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:00,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 282 transitions. [2023-11-22 22:29:00,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 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) [2023-11-22 22:29:00,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 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) [2023-11-22 22:29:00,698 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 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) [2023-11-22 22:29:00,698 INFO L175 Difference]: Start difference. First operand has 344 places, 533 transitions, 9983 flow. Second operand 24 states and 282 transitions. [2023-11-22 22:29:00,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 650 transitions, 12692 flow [2023-11-22 22:29:02,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 650 transitions, 12102 flow, removed 230 selfloop flow, removed 11 redundant places. [2023-11-22 22:29:02,046 INFO L231 Difference]: Finished difference. Result has 361 places, 547 transitions, 10235 flow [2023-11-22 22:29:02,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9599, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10235, PETRI_PLACES=361, PETRI_TRANSITIONS=547} [2023-11-22 22:29:02,047 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 334 predicate places. [2023-11-22 22:29:02,047 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 547 transitions, 10235 flow [2023-11-22 22:29:02,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.391304347826087) internal successors, (170), 23 states have internal predecessors, (170), 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) [2023-11-22 22:29:02,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:02,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:02,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-22 22:29:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-22 22:29:02,259 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:02,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1842455544, now seen corresponding path program 11 times [2023-11-22 22:29:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:02,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683702989] [2023-11-22 22:29:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:02,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683702989] [2023-11-22 22:29:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683702989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593806255] [2023-11-22 22:29:02,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:29:02,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:02,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:02,510 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:02,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-22 22:29:02,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 22:29:02,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:29:02,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:29:02,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:02,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:29:02,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 22:29:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:02,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:02,825 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:29:02,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:29:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593806255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:02,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:02,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-22 22:29:02,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98263349] [2023-11-22 22:29:02,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:02,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:29:02,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:29:02,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:29:02,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:02,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 547 transitions, 10235 flow. Second operand has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:29:02,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:02,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:02,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:06,620 INFO L124 PetriNetUnfolderBase]: 6125/11304 cut-off events. [2023-11-22 22:29:06,620 INFO L125 PetriNetUnfolderBase]: For 368068/368071 co-relation queries the response was YES. [2023-11-22 22:29:06,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83986 conditions, 11304 events. 6125/11304 cut-off events. For 368068/368071 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88216 event pairs, 1702 based on Foata normal form. 92/11392 useless extension candidates. Maximal degree in co-relation 83834. Up to 8661 conditions per place. [2023-11-22 22:29:06,750 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 573 selfloop transitions, 198 changer transitions 8/782 dead transitions. [2023-11-22 22:29:06,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 782 transitions, 14694 flow [2023-11-22 22:29:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-22 22:29:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-22 22:29:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 464 transitions. [2023-11-22 22:29:06,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-22 22:29:06,751 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 464 transitions. [2023-11-22 22:29:06,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 464 transitions. [2023-11-22 22:29:06,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:06,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 464 transitions. [2023-11-22 22:29:06,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 11.6) internal successors, (464), 40 states have internal predecessors, (464), 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) [2023-11-22 22:29:06,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 29.0) internal successors, (1189), 41 states have internal predecessors, (1189), 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) [2023-11-22 22:29:06,753 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 29.0) internal successors, (1189), 41 states have internal predecessors, (1189), 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) [2023-11-22 22:29:06,753 INFO L175 Difference]: Start difference. First operand has 361 places, 547 transitions, 10235 flow. Second operand 40 states and 464 transitions. [2023-11-22 22:29:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 782 transitions, 14694 flow [2023-11-22 22:29:08,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 782 transitions, 14380 flow, removed 96 selfloop flow, removed 13 redundant places. [2023-11-22 22:29:08,187 INFO L231 Difference]: Finished difference. Result has 391 places, 608 transitions, 11455 flow [2023-11-22 22:29:08,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9931, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=11455, PETRI_PLACES=391, PETRI_TRANSITIONS=608} [2023-11-22 22:29:08,187 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 364 predicate places. [2023-11-22 22:29:08,188 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 608 transitions, 11455 flow [2023-11-22 22:29:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:29:08,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:08,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:08,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-22 22:29:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-22 22:29:08,399 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:08,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1977675250, now seen corresponding path program 11 times [2023-11-22 22:29:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:08,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199836617] [2023-11-22 22:29:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:08,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199836617] [2023-11-22 22:29:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199836617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889123866] [2023-11-22 22:29:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:29:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:08,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:08,653 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:08,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-22 22:29:08,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 22:29:08,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:29:08,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 22:29:08,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:08,948 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 22:29:08,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2023-11-22 22:29:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:08,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:09,046 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 22:29:09,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 22:29:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889123866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:09,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-11-22 22:29:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238994493] [2023-11-22 22:29:09,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:09,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 22:29:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 22:29:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-22 22:29:09,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:09,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 608 transitions, 11455 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 22:29:09,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:09,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:09,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:12,653 INFO L124 PetriNetUnfolderBase]: 6107/11265 cut-off events. [2023-11-22 22:29:12,653 INFO L125 PetriNetUnfolderBase]: For 382873/382876 co-relation queries the response was YES. [2023-11-22 22:29:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85502 conditions, 11265 events. 6107/11265 cut-off events. For 382873/382876 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 87680 event pairs, 1814 based on Foata normal form. 26/11287 useless extension candidates. Maximal degree in co-relation 85346. Up to 9139 conditions per place. [2023-11-22 22:29:12,786 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 549 selfloop transitions, 138 changer transitions 32/722 dead transitions. [2023-11-22 22:29:12,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 722 transitions, 14310 flow [2023-11-22 22:29:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 22:29:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 22:29:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 280 transitions. [2023-11-22 22:29:12,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438871473354232 [2023-11-22 22:29:12,788 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 280 transitions. [2023-11-22 22:29:12,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 280 transitions. [2023-11-22 22:29:12,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:12,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 280 transitions. [2023-11-22 22:29:12,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 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) [2023-11-22 22:29:12,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 22:29:12,791 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 22:29:12,791 INFO L175 Difference]: Start difference. First operand has 391 places, 608 transitions, 11455 flow. Second operand 22 states and 280 transitions. [2023-11-22 22:29:12,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 722 transitions, 14310 flow [2023-11-22 22:29:14,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 722 transitions, 13847 flow, removed 48 selfloop flow, removed 22 redundant places. [2023-11-22 22:29:14,398 INFO L231 Difference]: Finished difference. Result has 392 places, 603 transitions, 11254 flow [2023-11-22 22:29:14,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10988, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11254, PETRI_PLACES=392, PETRI_TRANSITIONS=603} [2023-11-22 22:29:14,399 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 365 predicate places. [2023-11-22 22:29:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 603 transitions, 11254 flow [2023-11-22 22:29:14,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 22:29:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:14,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:14,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-22 22:29:14,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-22 22:29:14,612 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:14,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -545233534, now seen corresponding path program 12 times [2023-11-22 22:29:14,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:14,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643684953] [2023-11-22 22:29:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:14,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643684953] [2023-11-22 22:29:14,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643684953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:14,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743007579] [2023-11-22 22:29:14,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:29:14,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:14,921 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:14,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-22 22:29:15,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-22 22:29:15,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:29:15,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-22 22:29:15,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:15,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:29:15,336 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 22:29:15,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 22:29:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:29:15,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:15,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:29:15,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 22:29:15,528 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:29:15,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 22:29:15,593 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 22:29:15,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 198 [2023-11-22 22:29:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:29:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743007579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:15,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:15,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 25 [2023-11-22 22:29:15,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741736533] [2023-11-22 22:29:15,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:15,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 22:29:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 22:29:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-11-22 22:29:15,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:15,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 603 transitions, 11254 flow. Second operand has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 26 states have internal predecessors, (189), 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) [2023-11-22 22:29:15,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:15,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:15,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:20,613 INFO L124 PetriNetUnfolderBase]: 7355/13569 cut-off events. [2023-11-22 22:29:20,613 INFO L125 PetriNetUnfolderBase]: For 511042/511045 co-relation queries the response was YES. [2023-11-22 22:29:20,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102832 conditions, 13569 events. 7355/13569 cut-off events. For 511042/511045 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 109220 event pairs, 2070 based on Foata normal form. 152/13717 useless extension candidates. Maximal degree in co-relation 102675. Up to 9435 conditions per place. [2023-11-22 22:29:20,794 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 666 selfloop transitions, 260 changer transitions 12/941 dead transitions. [2023-11-22 22:29:20,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 941 transitions, 18345 flow [2023-11-22 22:29:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-22 22:29:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-22 22:29:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 508 transitions. [2023-11-22 22:29:20,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41707717569786534 [2023-11-22 22:29:20,795 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 508 transitions. [2023-11-22 22:29:20,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 508 transitions. [2023-11-22 22:29:20,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:20,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 508 transitions. [2023-11-22 22:29:20,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 12.095238095238095) internal successors, (508), 42 states have internal predecessors, (508), 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) [2023-11-22 22:29:20,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 29.0) internal successors, (1247), 43 states have internal predecessors, (1247), 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) [2023-11-22 22:29:20,798 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 29.0) internal successors, (1247), 43 states have internal predecessors, (1247), 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) [2023-11-22 22:29:20,798 INFO L175 Difference]: Start difference. First operand has 392 places, 603 transitions, 11254 flow. Second operand 42 states and 508 transitions. [2023-11-22 22:29:20,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 941 transitions, 18345 flow [2023-11-22 22:29:22,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 941 transitions, 17879 flow, removed 36 selfloop flow, removed 17 redundant places. [2023-11-22 22:29:22,899 INFO L231 Difference]: Finished difference. Result has 430 places, 708 transitions, 14004 flow [2023-11-22 22:29:22,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10885, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=14004, PETRI_PLACES=430, PETRI_TRANSITIONS=708} [2023-11-22 22:29:22,900 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 403 predicate places. [2023-11-22 22:29:22,900 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 708 transitions, 14004 flow [2023-11-22 22:29:22,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 26 states have internal predecessors, (189), 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) [2023-11-22 22:29:22,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:22,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:22,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-22 22:29:23,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:23,101 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:23,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash -72310736, now seen corresponding path program 12 times [2023-11-22 22:29:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718355917] [2023-11-22 22:29:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:23,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718355917] [2023-11-22 22:29:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718355917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749676611] [2023-11-22 22:29:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 22:29:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:23,356 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:23,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-22 22:29:23,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-22 22:29:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:29:23,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-22 22:29:23,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:23,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 22:29:23,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:29:23,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:29:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:29:23,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:23,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:29:23,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 22:29:23,919 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 22:29:23,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 22:29:23,964 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 22:29:23,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-22 22:29:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:29:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749676611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:24,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:24,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2023-11-22 22:29:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664191760] [2023-11-22 22:29:24,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 22:29:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 22:29:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-11-22 22:29:24,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:24,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 708 transitions, 14004 flow. Second operand has 24 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 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) [2023-11-22 22:29:24,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:24,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:24,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:28,814 INFO L124 PetriNetUnfolderBase]: 7497/13846 cut-off events. [2023-11-22 22:29:28,814 INFO L125 PetriNetUnfolderBase]: For 599167/599167 co-relation queries the response was YES. [2023-11-22 22:29:29,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110086 conditions, 13846 events. 7497/13846 cut-off events. For 599167/599167 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 112628 event pairs, 2344 based on Foata normal form. 12/13856 useless extension candidates. Maximal degree in co-relation 109911. Up to 10643 conditions per place. [2023-11-22 22:29:29,220 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 610 selfloop transitions, 198 changer transitions 16/827 dead transitions. [2023-11-22 22:29:29,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 827 transitions, 17537 flow [2023-11-22 22:29:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 22:29:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 22:29:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 257 transitions. [2023-11-22 22:29:29,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40282131661442006 [2023-11-22 22:29:29,238 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 257 transitions. [2023-11-22 22:29:29,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 257 transitions. [2023-11-22 22:29:29,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:29,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 257 transitions. [2023-11-22 22:29:29,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.681818181818182) internal successors, (257), 22 states have internal predecessors, (257), 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) [2023-11-22 22:29:29,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 22:29:29,240 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 22:29:29,240 INFO L175 Difference]: Start difference. First operand has 430 places, 708 transitions, 14004 flow. Second operand 22 states and 257 transitions. [2023-11-22 22:29:29,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 827 transitions, 17537 flow [2023-11-22 22:29:32,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 827 transitions, 16931 flow, removed 231 selfloop flow, removed 17 redundant places. [2023-11-22 22:29:32,264 INFO L231 Difference]: Finished difference. Result has 438 places, 742 transitions, 15065 flow [2023-11-22 22:29:32,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13433, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15065, PETRI_PLACES=438, PETRI_TRANSITIONS=742} [2023-11-22 22:29:32,265 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 411 predicate places. [2023-11-22 22:29:32,265 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 742 transitions, 15065 flow [2023-11-22 22:29:32,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 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) [2023-11-22 22:29:32,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:32,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:32,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-22 22:29:32,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-22 22:29:32,476 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:32,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -607041226, now seen corresponding path program 13 times [2023-11-22 22:29:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:32,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998742680] [2023-11-22 22:29:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:32,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:32,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998742680] [2023-11-22 22:29:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998742680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777409128] [2023-11-22 22:29:32,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:29:32,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:32,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:32,704 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:32,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-22 22:29:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:32,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:29:32,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:32,963 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 22:29:32,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 22:29:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:32,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:33,041 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:29:33,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:29:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 22:29:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777409128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:33,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2023-11-22 22:29:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113438927] [2023-11-22 22:29:33,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:29:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:29:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:29:33,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:33,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 742 transitions, 15065 flow. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 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) [2023-11-22 22:29:33,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:33,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:33,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:37,519 INFO L124 PetriNetUnfolderBase]: 7393/13671 cut-off events. [2023-11-22 22:29:37,520 INFO L125 PetriNetUnfolderBase]: For 570013/570013 co-relation queries the response was YES. [2023-11-22 22:29:37,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108796 conditions, 13671 events. 7393/13671 cut-off events. For 570013/570013 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 110979 event pairs, 2368 based on Foata normal form. 18/13687 useless extension candidates. Maximal degree in co-relation 108621. Up to 11069 conditions per place. [2023-11-22 22:29:37,706 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 630 selfloop transitions, 152 changer transitions 19/804 dead transitions. [2023-11-22 22:29:37,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 804 transitions, 17154 flow [2023-11-22 22:29:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 22:29:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 22:29:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 183 transitions. [2023-11-22 22:29:37,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2023-11-22 22:29:37,707 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 183 transitions. [2023-11-22 22:29:37,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 183 transitions. [2023-11-22 22:29:37,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:37,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 183 transitions. [2023-11-22 22:29:37,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.2) internal successors, (183), 15 states have internal predecessors, (183), 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) [2023-11-22 22:29:37,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:29:37,708 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 22:29:37,709 INFO L175 Difference]: Start difference. First operand has 438 places, 742 transitions, 15065 flow. Second operand 15 states and 183 transitions. [2023-11-22 22:29:37,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 804 transitions, 17154 flow [2023-11-22 22:29:40,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 804 transitions, 16389 flow, removed 300 selfloop flow, removed 11 redundant places. [2023-11-22 22:29:40,611 INFO L231 Difference]: Finished difference. Result has 441 places, 743 transitions, 14673 flow [2023-11-22 22:29:40,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14305, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14673, PETRI_PLACES=441, PETRI_TRANSITIONS=743} [2023-11-22 22:29:40,612 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 414 predicate places. [2023-11-22 22:29:40,612 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 743 transitions, 14673 flow [2023-11-22 22:29:40,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 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) [2023-11-22 22:29:40,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:40,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:40,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-22 22:29:40,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-11-22 22:29:40,823 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:40,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:40,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1191988324, now seen corresponding path program 13 times [2023-11-22 22:29:40,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:40,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78309778] [2023-11-22 22:29:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:40,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:41,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:41,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78309778] [2023-11-22 22:29:41,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78309778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:41,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873307113] [2023-11-22 22:29:41,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 22:29:41,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:41,052 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:41,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-22 22:29:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:41,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 22:29:41,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:41,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:29:41,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 22:29:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:41,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:41,395 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:29:41,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:29:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 22:29:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873307113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:41,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 22:29:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37375673] [2023-11-22 22:29:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 22:29:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 22:29:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-22 22:29:41,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:41,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 743 transitions, 14673 flow. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 22:29:41,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:41,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:45,921 INFO L124 PetriNetUnfolderBase]: 7325/13512 cut-off events. [2023-11-22 22:29:45,922 INFO L125 PetriNetUnfolderBase]: For 482622/482622 co-relation queries the response was YES. [2023-11-22 22:29:46,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103825 conditions, 13512 events. 7325/13512 cut-off events. For 482622/482622 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 109003 event pairs, 2344 based on Foata normal form. 48/13558 useless extension candidates. Maximal degree in co-relation 103651. Up to 10653 conditions per place. [2023-11-22 22:29:46,124 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 625 selfloop transitions, 203 changer transitions 2/833 dead transitions. [2023-11-22 22:29:46,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 833 transitions, 17161 flow [2023-11-22 22:29:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 22:29:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-22 22:29:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2023-11-22 22:29:46,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426497277676951 [2023-11-22 22:29:46,127 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 235 transitions. [2023-11-22 22:29:46,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 235 transitions. [2023-11-22 22:29:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:46,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 235 transitions. [2023-11-22 22:29:46,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.368421052631579) internal successors, (235), 19 states have internal predecessors, (235), 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) [2023-11-22 22:29:46,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 22:29:46,131 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 22:29:46,131 INFO L175 Difference]: Start difference. First operand has 441 places, 743 transitions, 14673 flow. Second operand 19 states and 235 transitions. [2023-11-22 22:29:46,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 833 transitions, 17161 flow [2023-11-22 22:29:48,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 833 transitions, 16832 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-11-22 22:29:48,358 INFO L231 Difference]: Finished difference. Result has 447 places, 752 transitions, 14939 flow [2023-11-22 22:29:48,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14344, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14939, PETRI_PLACES=447, PETRI_TRANSITIONS=752} [2023-11-22 22:29:48,359 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 420 predicate places. [2023-11-22 22:29:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 752 transitions, 14939 flow [2023-11-22 22:29:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 22:29:48,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:48,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:48,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-22 22:29:48,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:48,572 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:48,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1688037786, now seen corresponding path program 14 times [2023-11-22 22:29:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:48,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908584980] [2023-11-22 22:29:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:48,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:48,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908584980] [2023-11-22 22:29:48,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908584980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:48,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771060064] [2023-11-22 22:29:48,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:29:48,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:48,788 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:48,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-22 22:29:48,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:29:48,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:29:48,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:29:48,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:49,180 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 22:29:49,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 22:29:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:29:49,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:49,259 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:29:49,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:29:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 22:29:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771060064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:49,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:49,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 20 [2023-11-22 22:29:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663158711] [2023-11-22 22:29:49,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 22:29:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 22:29:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:29:49,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:49,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 752 transitions, 14939 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 22:29:49,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:49,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:29:54,087 INFO L124 PetriNetUnfolderBase]: 7361/13557 cut-off events. [2023-11-22 22:29:54,088 INFO L125 PetriNetUnfolderBase]: For 508948/508948 co-relation queries the response was YES. [2023-11-22 22:29:54,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105764 conditions, 13557 events. 7361/13557 cut-off events. For 508948/508948 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 109318 event pairs, 2128 based on Foata normal form. 72/13627 useless extension candidates. Maximal degree in co-relation 105589. Up to 10043 conditions per place. [2023-11-22 22:29:54,263 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 611 selfloop transitions, 230 changer transitions 2/846 dead transitions. [2023-11-22 22:29:54,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 846 transitions, 17981 flow [2023-11-22 22:29:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 22:29:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 22:29:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 218 transitions. [2023-11-22 22:29:54,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421906693711968 [2023-11-22 22:29:54,264 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 218 transitions. [2023-11-22 22:29:54,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 218 transitions. [2023-11-22 22:29:54,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:29:54,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 218 transitions. [2023-11-22 22:29:54,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 17 states have internal predecessors, (218), 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) [2023-11-22 22:29:54,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 22:29:54,266 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 22:29:54,266 INFO L175 Difference]: Start difference. First operand has 447 places, 752 transitions, 14939 flow. Second operand 17 states and 218 transitions. [2023-11-22 22:29:54,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 846 transitions, 17981 flow [2023-11-22 22:29:56,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 846 transitions, 17542 flow, removed 13 selfloop flow, removed 17 redundant places. [2023-11-22 22:29:56,702 INFO L231 Difference]: Finished difference. Result has 449 places, 759 transitions, 15275 flow [2023-11-22 22:29:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14478, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=15275, PETRI_PLACES=449, PETRI_TRANSITIONS=759} [2023-11-22 22:29:56,704 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 422 predicate places. [2023-11-22 22:29:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 759 transitions, 15275 flow [2023-11-22 22:29:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 22:29:56,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 22:29:56,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:29:56,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-22 22:29:56,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-22 22:29:56,915 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 22:29:56,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:29:56,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1727713888, now seen corresponding path program 14 times [2023-11-22 22:29:56,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:29:56,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722202807] [2023-11-22 22:29:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:29:56,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:29:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:29:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 22:29:57,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:29:57,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722202807] [2023-11-22 22:29:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722202807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:29:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798796407] [2023-11-22 22:29:57,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:29:57,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:29:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:29:57,165 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:29:57,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-22 22:29:57,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:29:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:29:57,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 22:29:57,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:29:57,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 22:29:57,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 22:29:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:29:57,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:29:57,565 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 22:29:57,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 22:29:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 22:29:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798796407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:29:57,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:29:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 15 [2023-11-22 22:29:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715887518] [2023-11-22 22:29:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:29:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 22:29:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:29:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 22:29:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-22 22:29:57,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 22:29:57,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 759 transitions, 15275 flow. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2023-11-22 22:29:57,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 22:29:57,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 22:29:57,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 22:30:02,076 INFO L124 PetriNetUnfolderBase]: 7375/13658 cut-off events. [2023-11-22 22:30:02,077 INFO L125 PetriNetUnfolderBase]: For 521748/521748 co-relation queries the response was YES. [2023-11-22 22:30:02,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106486 conditions, 13658 events. 7375/13658 cut-off events. For 521748/521748 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 111044 event pairs, 2154 based on Foata normal form. 96/13752 useless extension candidates. Maximal degree in co-relation 106309. Up to 10795 conditions per place. [2023-11-22 22:30:02,278 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 657 selfloop transitions, 185 changer transitions 1/846 dead transitions. [2023-11-22 22:30:02,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 846 transitions, 17872 flow [2023-11-22 22:30:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 22:30:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-22 22:30:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 227 transitions. [2023-11-22 22:30:02,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41197822141560797 [2023-11-22 22:30:02,282 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 227 transitions. [2023-11-22 22:30:02,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 227 transitions. [2023-11-22 22:30:02,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 22:30:02,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 227 transitions. [2023-11-22 22:30:02,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 11.947368421052632) internal successors, (227), 19 states have internal predecessors, (227), 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) [2023-11-22 22:30:02,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 22:30:02,284 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 22:30:02,284 INFO L175 Difference]: Start difference. First operand has 449 places, 759 transitions, 15275 flow. Second operand 19 states and 227 transitions. [2023-11-22 22:30:02,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 846 transitions, 17872 flow