./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-7.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/fib_safe-7.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-7.i ./goblint.2024-06-19_11-23-25.files/protection/fib_safe-7.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:42:27,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:42:27,352 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:42:27,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:42:27,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:42:27,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:42:27,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:42:27,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:42:27,384 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:42:27,390 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:42:27,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:42:27,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:42:27,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:42:27,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:42:27,394 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:42:27,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:42:27,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:42:27,395 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:42:27,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:42:27,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:42:27,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:42:27,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:42:27,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:42:27,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:42:27,397 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:42:27,397 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:42:27,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:42:27,397 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:42:27,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:42:27,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:42:27,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:42:27,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:42:27,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:42:27,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:42:27,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:42:27,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:42:27,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:42:27,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:42:27,401 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:42:27,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:42:27,401 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:42:27,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:42:27,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:42:27,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:42:27,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:42:27,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:42:27,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:42:27,713 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:42:27,716 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:42:27,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/fib_safe-7.yml/witness.yml [2024-06-21 15:42:27,846 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:42:27,846 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:42:27,847 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-7.i [2024-06-21 15:42:29,007 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:42:29,308 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:42:29,312 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i [2024-06-21 15:42:29,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e3398a70/e8569739b08e4a5bbd15a2e5ad00bf1b/FLAGadb61c409 [2024-06-21 15:42:29,341 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e3398a70/e8569739b08e4a5bbd15a2e5ad00bf1b [2024-06-21 15:42:29,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:42:29,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:42:29,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:42:29,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:42:29,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:42:29,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:42:27" (1/2) ... [2024-06-21 15:42:29,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f12b62 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:42:29, skipping insertion in model container [2024-06-21 15:42:29,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:42:27" (1/2) ... [2024-06-21 15:42:29,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@70338632 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:42:29, skipping insertion in model container [2024-06-21 15:42:29,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:42:29" (2/2) ... [2024-06-21 15:42:29,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f12b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29, skipping insertion in model container [2024-06-21 15:42:29,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:42:29" (2/2) ... [2024-06-21 15:42:29,355 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:42:29,399 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:42:29,400 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-21 15:42:29,400 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-21 15:42:29,400 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:42:29,400 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-21 15:42:29,442 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:42:29,796 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:42:29,808 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:42:29,922 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:42:29,992 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:42:29,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29 WrapperNode [2024-06-21 15:42:29,992 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:42:29,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:42:29,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:42:29,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:42:30,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,029 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,067 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-21 15:42:30,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:42:30,070 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:42:30,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:42:30,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:42:30,080 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,090 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,105 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:42:30,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,106 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,128 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:42:30,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:42:30,129 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:42:30,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:42:30,130 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (1/1) ... [2024-06-21 15:42:30,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:42:30,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:42:30,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:42:30,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:42:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-21 15:42:30,184 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-21 15:42:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-21 15:42:30,184 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-21 15:42:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:42:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:42:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:42:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:42:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:42:30,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:42:30,186 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:42:30,294 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:42:30,295 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:42:30,485 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:42:30,485 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:42:30,603 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:42:30,604 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-21 15:42:30,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:42:30 BoogieIcfgContainer [2024-06-21 15:42:30,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:42:30,607 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:42:30,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:42:30,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:42:30,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:42:27" (1/4) ... [2024-06-21 15:42:30,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e34d89 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:42:30, skipping insertion in model container [2024-06-21 15:42:30,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:42:29" (2/4) ... [2024-06-21 15:42:30,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e34d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:42:30, skipping insertion in model container [2024-06-21 15:42:30,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:42:29" (3/4) ... [2024-06-21 15:42:30,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e34d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:42:30, skipping insertion in model container [2024-06-21 15:42:30,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:42:30" (4/4) ... [2024-06-21 15:42:30,613 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2024-06-21 15:42:30,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:42:30,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 15:42:30,629 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:42:30,659 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:42:30,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-21 15:42:30,724 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-21 15:42:30,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:42:30,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-21 15:42:30,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-21 15:42:30,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-21 15:42:30,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:42:30,761 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=false, 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;@2b66c472, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:42:30,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 15:42:30,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:42:30,771 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-21 15:42:30,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:42:30,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:30,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:30,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:30,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash 230814316, now seen corresponding path program 1 times [2024-06-21 15:42:30,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:30,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736328590] [2024-06-21 15:42:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:30,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736328590] [2024-06-21 15:42:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736328590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:31,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:42:31,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356879030] [2024-06-21 15:42:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:31,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:42:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:31,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:42:31,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:42:31,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:31,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:31,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:31,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:31,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:31,659 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-21 15:42:31,660 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 15:42:31,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 536 events. 322/536 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2105 event pairs, 53 based on Foata normal form. 21/506 useless extension candidates. Maximal degree in co-relation 1034. Up to 295 conditions per place. [2024-06-21 15:42:31,668 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 33 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-21 15:42:31,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 225 flow [2024-06-21 15:42:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:42:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:42:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 15:42:31,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-06-21 15:42:31,686 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 89 transitions. [2024-06-21 15:42:31,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 225 flow [2024-06-21 15:42:31,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 15:42:31,693 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-21 15:42:31,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-06-21 15:42:31,699 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-21 15:42:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-21 15:42:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:31,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:31,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:42:31,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:31,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash -52698492, now seen corresponding path program 1 times [2024-06-21 15:42:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:31,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185895591] [2024-06-21 15:42:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:31,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:32,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185895591] [2024-06-21 15:42:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185895591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:32,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:32,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:42:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975892350] [2024-06-21 15:42:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:42:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:42:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:42:32,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:32,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:32,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:32,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:32,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:32,284 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-21 15:42:32,284 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-21 15:42:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 298 events. 160/298 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1096 event pairs, 13 based on Foata normal form. 10/308 useless extension candidates. Maximal degree in co-relation 762. Up to 115 conditions per place. [2024-06-21 15:42:32,291 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 41 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-21 15:42:32,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 289 flow [2024-06-21 15:42:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:42:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:42:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 15:42:32,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-21 15:42:32,296 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 98 transitions. [2024-06-21 15:42:32,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 289 flow [2024-06-21 15:42:32,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 15:42:32,303 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-21 15:42:32,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-21 15:42:32,305 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-21 15:42:32,305 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-21 15:42:32,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:32,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:32,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:32,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:42:32,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1633652470, now seen corresponding path program 1 times [2024-06-21 15:42:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224701775] [2024-06-21 15:42:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:32,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224701775] [2024-06-21 15:42:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224701775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:32,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:32,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:42:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749748966] [2024-06-21 15:42:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:42:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:42:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:42:32,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:32,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:32,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:32,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:32,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:32,833 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-21 15:42:32,834 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-21 15:42:32,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 273 events. 145/273 cut-off events. For 304/308 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 973 event pairs, 4 based on Foata normal form. 13/286 useless extension candidates. Maximal degree in co-relation 859. Up to 115 conditions per place. [2024-06-21 15:42:32,836 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-21 15:42:32,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 364 flow [2024-06-21 15:42:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:42:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:42:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 15:42:32,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-06-21 15:42:32,838 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 106 transitions. [2024-06-21 15:42:32,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 364 flow [2024-06-21 15:42:32,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 344 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 15:42:32,842 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-21 15:42:32,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-06-21 15:42:32,842 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-21 15:42:32,843 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-21 15:42:32,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:32,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:32,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:32,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:42:32,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:32,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash -659881598, now seen corresponding path program 1 times [2024-06-21 15:42:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202535687] [2024-06-21 15:42:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202535687] [2024-06-21 15:42:33,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202535687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:33,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:33,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:42:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165569209] [2024-06-21 15:42:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:42:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:42:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:42:33,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:33,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:33,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:33,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:33,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:33,227 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-21 15:42:33,229 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-21 15:42:33,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 315 events. 169/315 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1131 event pairs, 37 based on Foata normal form. 3/317 useless extension candidates. Maximal degree in co-relation 1054. Up to 179 conditions per place. [2024-06-21 15:42:33,232 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 15:42:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 346 flow [2024-06-21 15:42:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:42:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:42:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 15:42:33,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 15:42:33,234 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 84 transitions. [2024-06-21 15:42:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 346 flow [2024-06-21 15:42:33,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:42:33,238 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-21 15:42:33,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-06-21 15:42:33,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-21 15:42:33,240 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-21 15:42:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:33,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:33,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:33,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:42:33,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:33,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:33,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1018507759, now seen corresponding path program 1 times [2024-06-21 15:42:33,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:33,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791491401] [2024-06-21 15:42:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:33,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:33,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791491401] [2024-06-21 15:42:33,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791491401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:33,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:33,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:42:33,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233642743] [2024-06-21 15:42:33,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:33,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:42:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:42:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:42:33,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:33,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:33,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:33,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:33,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:33,711 INFO L124 PetriNetUnfolderBase]: 151/288 cut-off events. [2024-06-21 15:42:33,711 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-21 15:42:33,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 288 events. 151/288 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 997 event pairs, 31 based on Foata normal form. 9/296 useless extension candidates. Maximal degree in co-relation 990. Up to 176 conditions per place. [2024-06-21 15:42:33,714 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 32 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-21 15:42:33,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 347 flow [2024-06-21 15:42:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:42:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:42:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 15:42:33,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-06-21 15:42:33,716 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 89 transitions. [2024-06-21 15:42:33,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 347 flow [2024-06-21 15:42:33,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:42:33,719 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-21 15:42:33,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-06-21 15:42:33,720 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-21 15:42:33,721 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-21 15:42:33,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:33,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:33,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:42:33,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:33,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash -732814132, now seen corresponding path program 1 times [2024-06-21 15:42:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:33,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710480003] [2024-06-21 15:42:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:33,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:33,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:33,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710480003] [2024-06-21 15:42:33,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710480003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:33,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:33,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:42:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815786857] [2024-06-21 15:42:33,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:33,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:42:33,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:42:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:42:34,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 218 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:34,145 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-21 15:42:34,145 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-21 15:42:34,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 300 events. 157/300 cut-off events. For 637/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1045 event pairs, 31 based on Foata normal form. 5/305 useless extension candidates. Maximal degree in co-relation 1054. Up to 168 conditions per place. [2024-06-21 15:42:34,149 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-21 15:42:34,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 419 flow [2024-06-21 15:42:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:42:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:42:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 15:42:34,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-21 15:42:34,151 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 106 transitions. [2024-06-21 15:42:34,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 419 flow [2024-06-21 15:42:34,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 391 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 15:42:34,154 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-21 15:42:34,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-06-21 15:42:34,157 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 15:42:34,157 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-21 15:42:34,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:34,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:34,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:34,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:42:34,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:34,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash -640220558, now seen corresponding path program 2 times [2024-06-21 15:42:34,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379087215] [2024-06-21 15:42:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379087215] [2024-06-21 15:42:34,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379087215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:34,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:34,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:42:34,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589110628] [2024-06-21 15:42:34,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:34,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:42:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:42:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:42:34,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:34,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 266 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:34,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:34,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:34,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:34,580 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-21 15:42:34,580 INFO L125 PetriNetUnfolderBase]: For 808/812 co-relation queries the response was YES. [2024-06-21 15:42:34,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 314 events. 166/314 cut-off events. For 808/812 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1125 event pairs, 34 based on Foata normal form. 7/320 useless extension candidates. Maximal degree in co-relation 1196. Up to 192 conditions per place. [2024-06-21 15:42:34,583 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-21 15:42:34,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 482 flow [2024-06-21 15:42:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:42:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:42:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 15:42:34,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831417624521073 [2024-06-21 15:42:34,585 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 100 transitions. [2024-06-21 15:42:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 482 flow [2024-06-21 15:42:34,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 441 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:42:34,589 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-21 15:42:34,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=344, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-21 15:42:34,590 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-21 15:42:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-21 15:42:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:34,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:42:34,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:34,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -834086502, now seen corresponding path program 3 times [2024-06-21 15:42:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16616344] [2024-06-21 15:42:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:34,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:34,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16616344] [2024-06-21 15:42:34,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16616344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:34,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:34,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:42:34,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268073045] [2024-06-21 15:42:34,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:34,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:42:34,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:42:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:42:34,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 344 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:34,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:34,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:35,026 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-21 15:42:35,027 INFO L125 PetriNetUnfolderBase]: For 984/992 co-relation queries the response was YES. [2024-06-21 15:42:35,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 327 events. 172/327 cut-off events. For 984/992 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1198 event pairs, 31 based on Foata normal form. 9/336 useless extension candidates. Maximal degree in co-relation 1325. Up to 199 conditions per place. [2024-06-21 15:42:35,030 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-21 15:42:35,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 562 flow [2024-06-21 15:42:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:42:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:42:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 15:42:35,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-06-21 15:42:35,032 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 102 transitions. [2024-06-21 15:42:35,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 562 flow [2024-06-21 15:42:35,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 535 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:42:35,037 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-21 15:42:35,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-06-21 15:42:35,037 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-21 15:42:35,038 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-21 15:42:35,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:35,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:35,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:35,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:42:35,039 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:35,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash -639625912, now seen corresponding path program 4 times [2024-06-21 15:42:35,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:35,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820042041] [2024-06-21 15:42:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:35,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:35,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820042041] [2024-06-21 15:42:35,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820042041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:35,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:35,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:42:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371901880] [2024-06-21 15:42:35,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:35,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:42:35,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:42:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:42:35,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:35,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 417 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:35,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:35,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:35,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:35,429 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-21 15:42:35,430 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-21 15:42:35,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 339 events. 178/339 cut-off events. For 1234/1238 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1254 event pairs, 29 based on Foata normal form. 7/346 useless extension candidates. Maximal degree in co-relation 1464. Up to 209 conditions per place. [2024-06-21 15:42:35,433 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 48 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-21 15:42:35,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 647 flow [2024-06-21 15:42:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:42:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:42:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 15:42:35,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 15:42:35,435 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 103 transitions. [2024-06-21 15:42:35,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 647 flow [2024-06-21 15:42:35,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 605 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:42:35,441 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-21 15:42:35,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-06-21 15:42:35,441 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-21 15:42:35,442 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-21 15:42:35,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:35,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:35,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:42:35,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:35,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash -644982158, now seen corresponding path program 5 times [2024-06-21 15:42:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:35,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800225557] [2024-06-21 15:42:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800225557] [2024-06-21 15:42:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800225557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:35,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:35,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:42:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577381561] [2024-06-21 15:42:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:42:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:42:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:42:35,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:35,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 471 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:35,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:35,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:35,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:35,855 INFO L124 PetriNetUnfolderBase]: 181/341 cut-off events. [2024-06-21 15:42:35,855 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-21 15:42:35,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 341 events. 181/341 cut-off events. For 1490/1490 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1256 event pairs, 32 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 1568. Up to 211 conditions per place. [2024-06-21 15:42:35,858 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-21 15:42:35,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 687 flow [2024-06-21 15:42:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:42:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:42:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 15:42:35,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:35,860 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 99 transitions. [2024-06-21 15:42:35,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 687 flow [2024-06-21 15:42:35,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 647 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:42:35,866 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-21 15:42:35,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=519, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2024-06-21 15:42:35,867 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-21 15:42:35,867 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-21 15:42:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:35,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:35,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:35,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:42:35,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:35,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash -466836938, now seen corresponding path program 6 times [2024-06-21 15:42:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618191390] [2024-06-21 15:42:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618191390] [2024-06-21 15:42:36,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618191390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:36,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:36,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:42:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895498699] [2024-06-21 15:42:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:42:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:42:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:42:36,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:36,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:36,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:36,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:36,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:36,290 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-21 15:42:36,290 INFO L125 PetriNetUnfolderBase]: For 1750/1754 co-relation queries the response was YES. [2024-06-21 15:42:36,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 340 events. 181/340 cut-off events. For 1750/1754 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1269 event pairs, 35 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 1621. Up to 219 conditions per place. [2024-06-21 15:42:36,294 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-21 15:42:36,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 755 flow [2024-06-21 15:42:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:42:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:42:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 15:42:36,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-06-21 15:42:36,295 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 101 transitions. [2024-06-21 15:42:36,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 755 flow [2024-06-21 15:42:36,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 699 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:42:36,302 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-21 15:42:36,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=578, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-21 15:42:36,303 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-21 15:42:36,303 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-21 15:42:36,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:36,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:36,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:42:36,304 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:36,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1467999858, now seen corresponding path program 1 times [2024-06-21 15:42:36,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:36,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876034535] [2024-06-21 15:42:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:36,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876034535] [2024-06-21 15:42:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876034535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:36,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:36,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:36,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790543580] [2024-06-21 15:42:36,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:36,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:36,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:36,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:36,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:36,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:36,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:36,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:36,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:36,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:36,837 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-21 15:42:36,838 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-21 15:42:36,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 376 events. 199/376 cut-off events. For 2368/2372 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1478 event pairs, 11 based on Foata normal form. 7/383 useless extension candidates. Maximal degree in co-relation 1892. Up to 157 conditions per place. [2024-06-21 15:42:36,842 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-21 15:42:36,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 952 flow [2024-06-21 15:42:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 15:42:36,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2024-06-21 15:42:36,844 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 121 transitions. [2024-06-21 15:42:36,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 952 flow [2024-06-21 15:42:36,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 869 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:36,853 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-21 15:42:36,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=579, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2024-06-21 15:42:36,853 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-21 15:42:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-21 15:42:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:42:36,855 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:36,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1992088830, now seen corresponding path program 2 times [2024-06-21 15:42:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136509987] [2024-06-21 15:42:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:36,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136509987] [2024-06-21 15:42:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136509987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620712010] [2024-06-21 15:42:37,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:37,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:37,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 579 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:37,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:37,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:37,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:37,345 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-21 15:42:37,346 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-21 15:42:37,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 410 events. 217/410 cut-off events. For 2951/2955 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1701 event pairs, 30 based on Foata normal form. 7/417 useless extension candidates. Maximal degree in co-relation 2117. Up to 238 conditions per place. [2024-06-21 15:42:37,351 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-21 15:42:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 921 flow [2024-06-21 15:42:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 15:42:37,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103448275862069 [2024-06-21 15:42:37,353 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 119 transitions. [2024-06-21 15:42:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 921 flow [2024-06-21 15:42:37,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 854 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:37,364 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-21 15:42:37,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=602, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-06-21 15:42:37,365 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-21 15:42:37,365 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-21 15:42:37,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:37,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:37,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:42:37,366 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:37,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1992085110, now seen corresponding path program 3 times [2024-06-21 15:42:37,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:37,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277708843] [2024-06-21 15:42:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:37,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:37,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277708843] [2024-06-21 15:42:37,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277708843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:37,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:37,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:37,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341578421] [2024-06-21 15:42:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:37,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:37,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 602 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:37,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:37,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:37,834 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-21 15:42:37,835 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-21 15:42:37,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 425 events. 226/425 cut-off events. For 3312/3316 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1753 event pairs, 38 based on Foata normal form. 7/432 useless extension candidates. Maximal degree in co-relation 2234. Up to 265 conditions per place. [2024-06-21 15:42:37,844 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-21 15:42:37,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 897 flow [2024-06-21 15:42:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 15:42:37,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-21 15:42:37,846 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 117 transitions. [2024-06-21 15:42:37,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 897 flow [2024-06-21 15:42:37,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 849 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 15:42:37,856 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-21 15:42:37,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=633, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-21 15:42:37,858 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-21 15:42:37,858 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-21 15:42:37,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:37,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:37,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:37,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:42:37,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:37,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1992084955, now seen corresponding path program 1 times [2024-06-21 15:42:37,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:37,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943585260] [2024-06-21 15:42:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:38,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943585260] [2024-06-21 15:42:38,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943585260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:38,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:38,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781607636] [2024-06-21 15:42:38,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:38,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:38,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:38,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:38,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:38,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:38,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:38,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:38,343 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-21 15:42:38,344 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-06-21 15:42:38,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 444 events. 235/444 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1880 event pairs, 34 based on Foata normal form. 3/447 useless extension candidates. Maximal degree in co-relation 2349. Up to 280 conditions per place. [2024-06-21 15:42:38,348 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-21 15:42:38,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 909 flow [2024-06-21 15:42:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 15:42:38,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-21 15:42:38,351 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 117 transitions. [2024-06-21 15:42:38,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 909 flow [2024-06-21 15:42:38,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 855 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:38,366 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-21 15:42:38,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-06-21 15:42:38,367 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-21 15:42:38,367 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-21 15:42:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:38,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:38,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:38,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:42:38,370 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:38,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824425, now seen corresponding path program 2 times [2024-06-21 15:42:38,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:38,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214917815] [2024-06-21 15:42:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:38,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214917815] [2024-06-21 15:42:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214917815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:38,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:38,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322346480] [2024-06-21 15:42:38,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:38,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:38,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:38,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:38,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:38,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:38,853 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-21 15:42:38,853 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-21 15:42:38,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 459 events. 244/459 cut-off events. For 4098/4098 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1947 event pairs, 38 based on Foata normal form. 3/462 useless extension candidates. Maximal degree in co-relation 2476. Up to 310 conditions per place. [2024-06-21 15:42:38,858 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-21 15:42:38,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 919 flow [2024-06-21 15:42:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 15:42:38,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 15:42:38,859 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 113 transitions. [2024-06-21 15:42:38,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 919 flow [2024-06-21 15:42:38,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 857 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:38,874 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-21 15:42:38,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=657, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2024-06-21 15:42:38,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-21 15:42:38,875 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-21 15:42:38,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:38,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:38,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:38,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:42:38,876 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:38,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1640029890, now seen corresponding path program 4 times [2024-06-21 15:42:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:38,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109569054] [2024-06-21 15:42:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:38,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:39,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109569054] [2024-06-21 15:42:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109569054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:39,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896751154] [2024-06-21 15:42:39,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:39,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:39,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:39,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:39,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:39,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:39,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:39,394 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-21 15:42:39,395 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-21 15:42:39,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2754 conditions, 491 events. 262/491 cut-off events. For 4948/4952 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2140 event pairs, 32 based on Foata normal form. 7/498 useless extension candidates. Maximal degree in co-relation 2698. Up to 328 conditions per place. [2024-06-21 15:42:39,400 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-21 15:42:39,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1007 flow [2024-06-21 15:42:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 15:42:39,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-21 15:42:39,402 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 115 transitions. [2024-06-21 15:42:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1007 flow [2024-06-21 15:42:39,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 953 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:39,415 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-21 15:42:39,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=687, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-06-21 15:42:39,416 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-21 15:42:39,416 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-21 15:42:39,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:39,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:39,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:39,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:42:39,417 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:39,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:39,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824270, now seen corresponding path program 5 times [2024-06-21 15:42:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149329057] [2024-06-21 15:42:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:39,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:39,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149329057] [2024-06-21 15:42:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149329057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:39,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962540561] [2024-06-21 15:42:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:39,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:39,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:39,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:39,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:39,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:39,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:39,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:39,946 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-21 15:42:39,946 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-21 15:42:39,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 508 events. 271/508 cut-off events. For 5670/5674 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2250 event pairs, 36 based on Foata normal form. 7/515 useless extension candidates. Maximal degree in co-relation 2835. Up to 355 conditions per place. [2024-06-21 15:42:39,952 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-21 15:42:39,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 986 flow [2024-06-21 15:42:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 15:42:39,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 15:42:39,954 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 113 transitions. [2024-06-21 15:42:39,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 986 flow [2024-06-21 15:42:39,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 942 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:42:39,967 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-21 15:42:39,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=716, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-06-21 15:42:39,968 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-21 15:42:39,968 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-21 15:42:39,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:39,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:39,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:42:39,969 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:39,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1646670245, now seen corresponding path program 3 times [2024-06-21 15:42:39,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:39,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300491939] [2024-06-21 15:42:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:39,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300491939] [2024-06-21 15:42:40,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300491939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:40,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:40,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:40,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056595252] [2024-06-21 15:42:40,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:40,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:40,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:40,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:40,454 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-21 15:42:40,454 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-21 15:42:40,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3069 conditions, 542 events. 289/542 cut-off events. For 6153/6157 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2473 event pairs, 38 based on Foata normal form. 13/555 useless extension candidates. Maximal degree in co-relation 3010. Up to 378 conditions per place. [2024-06-21 15:42:40,460 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-21 15:42:40,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1027 flow [2024-06-21 15:42:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 15:42:40,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 15:42:40,462 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 116 transitions. [2024-06-21 15:42:40,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1027 flow [2024-06-21 15:42:40,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 977 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:40,478 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-21 15:42:40,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=743, PETRI_PLACES=102, PETRI_TRANSITIONS=74} [2024-06-21 15:42:40,479 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-21 15:42:40,479 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-21 15:42:40,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:40,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:40,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:40,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:42:40,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:40,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1646433870, now seen corresponding path program 6 times [2024-06-21 15:42:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:40,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945043894] [2024-06-21 15:42:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:40,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945043894] [2024-06-21 15:42:40,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945043894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:40,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:40,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:40,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868036842] [2024-06-21 15:42:40,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:40,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:40,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:40,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 74 transitions, 743 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:40,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:40,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:40,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:40,937 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-21 15:42:40,937 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-21 15:42:40,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 559 events. 298/559 cut-off events. For 7239/7243 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2591 event pairs, 38 based on Foata normal form. 7/566 useless extension candidates. Maximal degree in co-relation 3228. Up to 394 conditions per place. [2024-06-21 15:42:40,944 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-21 15:42:40,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1056 flow [2024-06-21 15:42:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 15:42:40,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 15:42:40,947 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 113 transitions. [2024-06-21 15:42:40,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1056 flow [2024-06-21 15:42:40,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 1013 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 15:42:40,967 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-21 15:42:40,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=775, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2024-06-21 15:42:40,968 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-21 15:42:40,968 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-21 15:42:40,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:40,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:40,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:40,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:42:40,969 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:40,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1933848355, now seen corresponding path program 4 times [2024-06-21 15:42:40,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:40,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454550770] [2024-06-21 15:42:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:40,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:41,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:41,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454550770] [2024-06-21 15:42:41,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454550770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:41,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:41,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:41,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263831964] [2024-06-21 15:42:41,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:41,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:41,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:41,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:41,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:41,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:41,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:41,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:41,453 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-21 15:42:41,454 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-21 15:42:41,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 574 events. 307/574 cut-off events. For 7631/7631 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2662 event pairs, 36 based on Foata normal form. 3/577 useless extension candidates. Maximal degree in co-relation 3325. Up to 409 conditions per place. [2024-06-21 15:42:41,459 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-21 15:42:41,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1061 flow [2024-06-21 15:42:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 15:42:41,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 15:42:41,461 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 113 transitions. [2024-06-21 15:42:41,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1061 flow [2024-06-21 15:42:41,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 1011 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:41,479 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-21 15:42:41,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=795, PETRI_PLACES=108, PETRI_TRANSITIONS=76} [2024-06-21 15:42:41,480 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-21 15:42:41,480 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-21 15:42:41,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:41,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:41,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:41,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:42:41,481 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:41,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1808451193, now seen corresponding path program 5 times [2024-06-21 15:42:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:41,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270886580] [2024-06-21 15:42:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:41,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:41,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:41,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270886580] [2024-06-21 15:42:41,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270886580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:41,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:41,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759607595] [2024-06-21 15:42:41,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:41,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:41,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 76 transitions, 795 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:41,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:41,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:41,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:41,966 INFO L124 PetriNetUnfolderBase]: 325/606 cut-off events. [2024-06-21 15:42:41,967 INFO L125 PetriNetUnfolderBase]: For 8497/8497 co-relation queries the response was YES. [2024-06-21 15:42:41,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 606 events. 325/606 cut-off events. For 8497/8497 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2873 event pairs, 45 based on Foata normal form. 9/614 useless extension candidates. Maximal degree in co-relation 3528. Up to 429 conditions per place. [2024-06-21 15:42:41,976 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-21 15:42:41,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1107 flow [2024-06-21 15:42:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 15:42:41,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 15:42:41,978 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 113 transitions. [2024-06-21 15:42:41,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1107 flow [2024-06-21 15:42:41,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 1047 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:41,998 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-21 15:42:41,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=819, PETRI_PLACES=111, PETRI_TRANSITIONS=78} [2024-06-21 15:42:41,998 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 15:42:41,999 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-21 15:42:41,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:41,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:41,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:41,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:42:41,999 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:42,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687413, now seen corresponding path program 6 times [2024-06-21 15:42:42,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:42,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893239863] [2024-06-21 15:42:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:42,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:42,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893239863] [2024-06-21 15:42:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893239863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:42,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:42,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:42,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834794465] [2024-06-21 15:42:42,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:42,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:42,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:42,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:42,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:42,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:42,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:42,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:42,478 INFO L124 PetriNetUnfolderBase]: 334/623 cut-off events. [2024-06-21 15:42:42,478 INFO L125 PetriNetUnfolderBase]: For 9449/9449 co-relation queries the response was YES. [2024-06-21 15:42:42,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 623 events. 334/623 cut-off events. For 9449/9449 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2991 event pairs, 45 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 3689. Up to 445 conditions per place. [2024-06-21 15:42:42,485 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-21 15:42:42,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1103 flow [2024-06-21 15:42:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 15:42:42,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:42,486 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 110 transitions. [2024-06-21 15:42:42,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1103 flow [2024-06-21 15:42:42,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 1055 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:42:42,510 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-21 15:42:42,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=847, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-06-21 15:42:42,510 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-21 15:42:42,510 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-21 15:42:42,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:42,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:42,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:42,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:42:42,511 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:42,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687568, now seen corresponding path program 7 times [2024-06-21 15:42:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:42,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693602745] [2024-06-21 15:42:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:42,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693602745] [2024-06-21 15:42:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693602745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:42,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:42,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506033297] [2024-06-21 15:42:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:42,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:42,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:42,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:42,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:42,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 847 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:42,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:42,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:42,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:43,010 INFO L124 PetriNetUnfolderBase]: 343/638 cut-off events. [2024-06-21 15:42:43,010 INFO L125 PetriNetUnfolderBase]: For 10520/10524 co-relation queries the response was YES. [2024-06-21 15:42:43,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 638 events. 343/638 cut-off events. For 10520/10524 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3058 event pairs, 49 based on Foata normal form. 7/644 useless extension candidates. Maximal degree in co-relation 3858. Up to 460 conditions per place. [2024-06-21 15:42:43,025 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-21 15:42:43,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1168 flow [2024-06-21 15:42:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 15:42:43,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:43,026 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 110 transitions. [2024-06-21 15:42:43,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1168 flow [2024-06-21 15:42:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 97 transitions, 1104 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:43,049 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-21 15:42:43,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=862, PETRI_PLACES=117, PETRI_TRANSITIONS=80} [2024-06-21 15:42:43,049 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-21 15:42:43,049 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-21 15:42:43,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:43,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:43,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:43,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:42:43,050 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:43,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1480328864, now seen corresponding path program 8 times [2024-06-21 15:42:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642630560] [2024-06-21 15:42:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:43,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642630560] [2024-06-21 15:42:43,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642630560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:43,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:43,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189706002] [2024-06-21 15:42:43,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:43,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:43,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:43,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 80 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:43,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:43,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:43,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:43,558 INFO L124 PetriNetUnfolderBase]: 352/655 cut-off events. [2024-06-21 15:42:43,559 INFO L125 PetriNetUnfolderBase]: For 11310/11314 co-relation queries the response was YES. [2024-06-21 15:42:43,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 655 events. 352/655 cut-off events. For 11310/11314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3164 event pairs, 45 based on Foata normal form. 7/661 useless extension candidates. Maximal degree in co-relation 3987. Up to 460 conditions per place. [2024-06-21 15:42:43,565 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 75 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-21 15:42:43,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1243 flow [2024-06-21 15:42:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 15:42:43,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-21 15:42:43,567 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 112 transitions. [2024-06-21 15:42:43,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1243 flow [2024-06-21 15:42:43,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 1189 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:43,614 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-21 15:42:43,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=119, PETRI_TRANSITIONS=81} [2024-06-21 15:42:43,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-21 15:42:43,615 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-21 15:42:43,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:43,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:43,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:42:43,616 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:43,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1480390399, now seen corresponding path program 7 times [2024-06-21 15:42:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:43,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22543789] [2024-06-21 15:42:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:43,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22543789] [2024-06-21 15:42:43,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22543789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:43,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:43,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900094166] [2024-06-21 15:42:43,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:43,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:43,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:43,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:43,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 81 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:43,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:43,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:43,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:44,092 INFO L124 PetriNetUnfolderBase]: 361/670 cut-off events. [2024-06-21 15:42:44,093 INFO L125 PetriNetUnfolderBase]: For 11956/11960 co-relation queries the response was YES. [2024-06-21 15:42:44,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 670 events. 361/670 cut-off events. For 11956/11960 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3266 event pairs, 47 based on Foata normal form. 7/676 useless extension candidates. Maximal degree in co-relation 4104. Up to 487 conditions per place. [2024-06-21 15:42:44,100 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-21 15:42:44,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1181 flow [2024-06-21 15:42:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 15:42:44,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:44,102 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 110 transitions. [2024-06-21 15:42:44,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1181 flow [2024-06-21 15:42:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 1119 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:44,132 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-21 15:42:44,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=907, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-06-21 15:42:44,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-21 15:42:44,134 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-21 15:42:44,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:44,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:44,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:44,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:42:44,135 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:44,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1815087828, now seen corresponding path program 9 times [2024-06-21 15:42:44,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:44,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036156287] [2024-06-21 15:42:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:44,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:44,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036156287] [2024-06-21 15:42:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036156287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:44,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748038575] [2024-06-21 15:42:44,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:44,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:44,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:44,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:44,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:44,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:44,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:44,632 INFO L124 PetriNetUnfolderBase]: 370/687 cut-off events. [2024-06-21 15:42:44,633 INFO L125 PetriNetUnfolderBase]: For 13355/13355 co-relation queries the response was YES. [2024-06-21 15:42:44,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 687 events. 370/687 cut-off events. For 13355/13355 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3386 event pairs, 47 based on Foata normal form. 3/689 useless extension candidates. Maximal degree in co-relation 4277. Up to 502 conditions per place. [2024-06-21 15:42:44,638 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-21 15:42:44,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1240 flow [2024-06-21 15:42:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 15:42:44,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:44,640 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 110 transitions. [2024-06-21 15:42:44,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1240 flow [2024-06-21 15:42:44,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 1172 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:44,663 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-21 15:42:44,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=924, PETRI_PLACES=122, PETRI_TRANSITIONS=83} [2024-06-21 15:42:44,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-21 15:42:44,664 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-21 15:42:44,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:44,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:44,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:42:44,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:44,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1578762583, now seen corresponding path program 8 times [2024-06-21 15:42:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:44,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174957836] [2024-06-21 15:42:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:44,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:44,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174957836] [2024-06-21 15:42:44,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174957836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:44,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:44,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:44,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601673447] [2024-06-21 15:42:44,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:44,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:44,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:44,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 83 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:44,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:44,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:44,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:45,183 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-21 15:42:45,183 INFO L125 PetriNetUnfolderBase]: For 13987/13987 co-relation queries the response was YES. [2024-06-21 15:42:45,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 721 events. 388/721 cut-off events. For 13987/13987 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3616 event pairs, 43 based on Foata normal form. 9/729 useless extension candidates. Maximal degree in co-relation 4430. Up to 525 conditions per place. [2024-06-21 15:42:45,191 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 76 selfloop transitions, 24 changer transitions 1/104 dead transitions. [2024-06-21 15:42:45,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 104 transitions, 1255 flow [2024-06-21 15:42:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 15:42:45,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38275862068965516 [2024-06-21 15:42:45,199 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 111 transitions. [2024-06-21 15:42:45,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 104 transitions, 1255 flow [2024-06-21 15:42:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 1193 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:45,230 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-21 15:42:45,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=961, PETRI_PLACES=125, PETRI_TRANSITIONS=85} [2024-06-21 15:42:45,231 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-21 15:42:45,231 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-21 15:42:45,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:45,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:45,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:45,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:42:45,232 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:45,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1586806153, now seen corresponding path program 9 times [2024-06-21 15:42:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:45,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348388773] [2024-06-21 15:42:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:45,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348388773] [2024-06-21 15:42:45,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348388773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:45,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:45,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647148424] [2024-06-21 15:42:45,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:45,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:45,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:45,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:45,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 85 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:45,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:45,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:45,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:45,734 INFO L124 PetriNetUnfolderBase]: 388/723 cut-off events. [2024-06-21 15:42:45,734 INFO L125 PetriNetUnfolderBase]: For 15345/15349 co-relation queries the response was YES. [2024-06-21 15:42:45,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 723 events. 388/723 cut-off events. For 15345/15349 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3626 event pairs, 45 based on Foata normal form. 9/731 useless extension candidates. Maximal degree in co-relation 4554. Up to 540 conditions per place. [2024-06-21 15:42:45,741 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-21 15:42:45,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1273 flow [2024-06-21 15:42:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 15:42:45,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 15:42:45,742 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 113 transitions. [2024-06-21 15:42:45,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1273 flow [2024-06-21 15:42:45,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 1186 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:45,775 INFO L231 Difference]: Finished difference. Result has 127 places, 86 transitions, 964 flow [2024-06-21 15:42:45,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=964, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2024-06-21 15:42:45,777 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2024-06-21 15:42:45,777 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 964 flow [2024-06-21 15:42:45,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:45,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:45,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:42:45,778 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:45,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:45,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042373, now seen corresponding path program 10 times [2024-06-21 15:42:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:45,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121547] [2024-06-21 15:42:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121547] [2024-06-21 15:42:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:46,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:46,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:46,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696403478] [2024-06-21 15:42:46,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:46,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:46,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:46,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:46,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:46,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 964 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:46,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:46,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:46,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:46,280 INFO L124 PetriNetUnfolderBase]: 397/738 cut-off events. [2024-06-21 15:42:46,281 INFO L125 PetriNetUnfolderBase]: For 16408/16412 co-relation queries the response was YES. [2024-06-21 15:42:46,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4771 conditions, 738 events. 397/738 cut-off events. For 16408/16412 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3699 event pairs, 54 based on Foata normal form. 3/740 useless extension candidates. Maximal degree in co-relation 4699. Up to 556 conditions per place. [2024-06-21 15:42:46,289 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-21 15:42:46,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 103 transitions, 1256 flow [2024-06-21 15:42:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 15:42:46,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:46,290 INFO L175 Difference]: Start difference. First operand has 127 places, 86 transitions, 964 flow. Second operand 10 states and 110 transitions. [2024-06-21 15:42:46,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 103 transitions, 1256 flow [2024-06-21 15:42:46,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1166 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:46,327 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 966 flow [2024-06-21 15:42:46,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=966, PETRI_PLACES=128, PETRI_TRANSITIONS=87} [2024-06-21 15:42:46,328 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-21 15:42:46,328 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 966 flow [2024-06-21 15:42:46,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:46,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:46,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:42:46,329 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:46,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042528, now seen corresponding path program 10 times [2024-06-21 15:42:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:46,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878914715] [2024-06-21 15:42:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:46,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:46,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878914715] [2024-06-21 15:42:46,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878914715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:46,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:46,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:42:46,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270130179] [2024-06-21 15:42:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:46,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:42:46,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:42:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:42:46,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:46,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 87 transitions, 966 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:46,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:46,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:46,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:46,813 INFO L124 PetriNetUnfolderBase]: 391/729 cut-off events. [2024-06-21 15:42:46,814 INFO L125 PetriNetUnfolderBase]: For 15414/15418 co-relation queries the response was YES. [2024-06-21 15:42:46,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 729 events. 391/729 cut-off events. For 15414/15418 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3662 event pairs, 52 based on Foata normal form. 3/731 useless extension candidates. Maximal degree in co-relation 4493. Up to 547 conditions per place. [2024-06-21 15:42:46,821 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-21 15:42:46,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 103 transitions, 1268 flow [2024-06-21 15:42:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:42:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:42:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 15:42:46,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 15:42:46,824 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 966 flow. Second operand 10 states and 110 transitions. [2024-06-21 15:42:46,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 103 transitions, 1268 flow [2024-06-21 15:42:46,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 103 transitions, 1188 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 15:42:46,862 INFO L231 Difference]: Finished difference. Result has 130 places, 87 transitions, 942 flow [2024-06-21 15:42:46,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=942, PETRI_PLACES=130, PETRI_TRANSITIONS=87} [2024-06-21 15:42:46,862 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2024-06-21 15:42:46,863 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 87 transitions, 942 flow [2024-06-21 15:42:46,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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) [2024-06-21 15:42:46,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:46,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:46,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:42:46,864 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:46,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1736643841, now seen corresponding path program 1 times [2024-06-21 15:42:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:46,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400343079] [2024-06-21 15:42:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:46,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400343079] [2024-06-21 15:42:47,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400343079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:47,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:47,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699828878] [2024-06-21 15:42:47,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:47,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:47,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 87 transitions, 942 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:47,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:47,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:47,499 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-21 15:42:47,499 INFO L125 PetriNetUnfolderBase]: For 18074/18078 co-relation queries the response was YES. [2024-06-21 15:42:47,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 784 events. 418/784 cut-off events. For 18074/18078 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3996 event pairs, 11 based on Foata normal form. 13/797 useless extension candidates. Maximal degree in co-relation 4724. Up to 442 conditions per place. [2024-06-21 15:42:47,505 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-21 15:42:47,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 122 transitions, 1504 flow [2024-06-21 15:42:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 15:42:47,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-06-21 15:42:47,509 INFO L175 Difference]: Start difference. First operand has 130 places, 87 transitions, 942 flow. Second operand 11 states and 133 transitions. [2024-06-21 15:42:47,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 122 transitions, 1504 flow [2024-06-21 15:42:47,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1408 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:47,546 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-21 15:42:47,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=860, PETRI_PLACES=132, PETRI_TRANSITIONS=83} [2024-06-21 15:42:47,547 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-21 15:42:47,548 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-21 15:42:47,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:47,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:47,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:47,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:42:47,549 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:47,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1626998229, now seen corresponding path program 2 times [2024-06-21 15:42:47,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:47,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002582436] [2024-06-21 15:42:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:47,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:47,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002582436] [2024-06-21 15:42:47,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002582436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:47,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:47,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:47,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847969674] [2024-06-21 15:42:47,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:47,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:47,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:47,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 83 transitions, 860 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:47,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:47,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:48,058 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-21 15:42:48,058 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-21 15:42:48,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 705 events. 377/705 cut-off events. For 16016/16020 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3524 event pairs, 37 based on Foata normal form. 13/718 useless extension candidates. Maximal degree in co-relation 4149. Up to 443 conditions per place. [2024-06-21 15:42:48,065 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-21 15:42:48,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1332 flow [2024-06-21 15:42:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 15:42:48,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2024-06-21 15:42:48,066 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 127 transitions. [2024-06-21 15:42:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1332 flow [2024-06-21 15:42:48,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1262 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 15:42:48,099 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-21 15:42:48,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=806, PETRI_PLACES=126, PETRI_TRANSITIONS=80} [2024-06-21 15:42:48,099 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-21 15:42:48,100 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-21 15:42:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:48,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:48,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:48,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:42:48,101 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:48,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1625095449, now seen corresponding path program 3 times [2024-06-21 15:42:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:48,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179736981] [2024-06-21 15:42:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179736981] [2024-06-21 15:42:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179736981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:48,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36572586] [2024-06-21 15:42:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:48,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:48,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 806 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:48,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:48,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:48,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:48,600 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-21 15:42:48,600 INFO L125 PetriNetUnfolderBase]: For 15334/15334 co-relation queries the response was YES. [2024-06-21 15:42:48,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 669 events. 357/669 cut-off events. For 15334/15334 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3325 event pairs, 37 based on Foata normal form. 9/678 useless extension candidates. Maximal degree in co-relation 3846. Up to 423 conditions per place. [2024-06-21 15:42:48,605 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-21 15:42:48,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1204 flow [2024-06-21 15:42:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 15:42:48,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887147335423197 [2024-06-21 15:42:48,606 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 124 transitions. [2024-06-21 15:42:48,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1204 flow [2024-06-21 15:42:48,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 1152 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:48,621 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-21 15:42:48,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=782, PETRI_PLACES=123, PETRI_TRANSITIONS=78} [2024-06-21 15:42:48,621 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-21 15:42:48,622 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-21 15:42:48,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:48,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:48,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:48,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:42:48,622 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:48,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1625090799, now seen corresponding path program 4 times [2024-06-21 15:42:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:48,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256939329] [2024-06-21 15:42:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:48,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:48,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256939329] [2024-06-21 15:42:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256939329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:48,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693232241] [2024-06-21 15:42:48,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:48,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:49,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:49,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 782 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:49,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:49,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:49,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:49,220 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-21 15:42:49,221 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-21 15:42:49,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 652 events. 346/652 cut-off events. For 14321/14325 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3204 event pairs, 37 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 3691. Up to 406 conditions per place. [2024-06-21 15:42:49,225 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-21 15:42:49,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1132 flow [2024-06-21 15:42:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 15:42:49,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-21 15:42:49,226 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 123 transitions. [2024-06-21 15:42:49,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1132 flow [2024-06-21 15:42:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 1078 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:49,252 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-21 15:42:49,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=738, PETRI_PLACES=121, PETRI_TRANSITIONS=73} [2024-06-21 15:42:49,252 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-21 15:42:49,252 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-21 15:42:49,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:49,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:49,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:49,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:42:49,253 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:49,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash -782989849, now seen corresponding path program 5 times [2024-06-21 15:42:49,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:49,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517983953] [2024-06-21 15:42:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:49,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:49,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:49,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517983953] [2024-06-21 15:42:49,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517983953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:49,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:49,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:49,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92358736] [2024-06-21 15:42:49,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:49,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:49,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:49,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 738 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:49,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:49,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:49,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:49,797 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-21 15:42:49,797 INFO L125 PetriNetUnfolderBase]: For 13009/13013 co-relation queries the response was YES. [2024-06-21 15:42:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 616 events. 329/616 cut-off events. For 13009/13013 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2982 event pairs, 33 based on Foata normal form. 13/629 useless extension candidates. Maximal degree in co-relation 3543. Up to 377 conditions per place. [2024-06-21 15:42:49,802 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-21 15:42:49,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1176 flow [2024-06-21 15:42:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 15:42:49,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-21 15:42:49,803 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 123 transitions. [2024-06-21 15:42:49,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1176 flow [2024-06-21 15:42:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 1089 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 15:42:49,825 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-21 15:42:49,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=671, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2024-06-21 15:42:49,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-21 15:42:49,825 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-21 15:42:49,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:49,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:49,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:49,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:42:49,826 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:49,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash -781087069, now seen corresponding path program 6 times [2024-06-21 15:42:49,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032043804] [2024-06-21 15:42:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:49,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:50,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:50,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032043804] [2024-06-21 15:42:50,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032043804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:50,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:50,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:50,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253202594] [2024-06-21 15:42:50,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:50,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:50,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:50,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:50,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:50,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:50,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:50,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:50,359 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-21 15:42:50,359 INFO L125 PetriNetUnfolderBase]: For 11019/11019 co-relation queries the response was YES. [2024-06-21 15:42:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 580 events. 309/580 cut-off events. For 11019/11019 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2773 event pairs, 33 based on Foata normal form. 9/589 useless extension candidates. Maximal degree in co-relation 3161. Up to 357 conditions per place. [2024-06-21 15:42:50,363 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-21 15:42:50,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1027 flow [2024-06-21 15:42:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 15:42:50,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761755485893417 [2024-06-21 15:42:50,370 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 120 transitions. [2024-06-21 15:42:50,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1027 flow [2024-06-21 15:42:50,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 985 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:50,388 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-21 15:42:50,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=111, PETRI_TRANSITIONS=68} [2024-06-21 15:42:50,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 15:42:50,389 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-21 15:42:50,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:50,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:50,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:50,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:42:50,390 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:50,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -698560175, now seen corresponding path program 7 times [2024-06-21 15:42:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:50,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964504958] [2024-06-21 15:42:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:50,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:50,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964504958] [2024-06-21 15:42:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964504958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:50,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:50,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:50,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798001303] [2024-06-21 15:42:50,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:50,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:50,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:50,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 68 transitions, 649 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:50,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:50,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:50,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:50,853 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-21 15:42:50,854 INFO L125 PetriNetUnfolderBase]: For 10686/10686 co-relation queries the response was YES. [2024-06-21 15:42:50,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3079 conditions, 563 events. 298/563 cut-off events. For 10686/10686 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2681 event pairs, 15 based on Foata normal form. 9/572 useless extension candidates. Maximal degree in co-relation 3016. Up to 340 conditions per place. [2024-06-21 15:42:50,857 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-21 15:42:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 961 flow [2024-06-21 15:42:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 15:42:50,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-21 15:42:50,859 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 119 transitions. [2024-06-21 15:42:50,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 961 flow [2024-06-21 15:42:50,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 917 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:50,871 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-21 15:42:50,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=611, PETRI_PLACES=109, PETRI_TRANSITIONS=64} [2024-06-21 15:42:50,872 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-21 15:42:50,872 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-21 15:42:50,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:50,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:50,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:50,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:42:50,872 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:50,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash -492829295, now seen corresponding path program 8 times [2024-06-21 15:42:50,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:50,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144097049] [2024-06-21 15:42:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:50,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:51,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144097049] [2024-06-21 15:42:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144097049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:51,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:51,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252813092] [2024-06-21 15:42:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:51,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:51,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:51,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 64 transitions, 611 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:51,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:51,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:51,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:51,376 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-21 15:42:51,376 INFO L125 PetriNetUnfolderBase]: For 9720/9724 co-relation queries the response was YES. [2024-06-21 15:42:51,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 538 events. 285/538 cut-off events. For 9720/9724 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2518 event pairs, 33 based on Foata normal form. 13/551 useless extension candidates. Maximal degree in co-relation 2909. Up to 319 conditions per place. [2024-06-21 15:42:51,379 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-21 15:42:51,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 939 flow [2024-06-21 15:42:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 15:42:51,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2024-06-21 15:42:51,381 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 122 transitions. [2024-06-21 15:42:51,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 939 flow [2024-06-21 15:42:51,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 90 transitions, 881 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 15:42:51,398 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-21 15:42:51,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=561, PETRI_PLACES=104, PETRI_TRANSITIONS=61} [2024-06-21 15:42:51,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-21 15:42:51,399 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-21 15:42:51,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:51,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:51,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:51,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:42:51,400 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:51,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -500156765, now seen corresponding path program 9 times [2024-06-21 15:42:51,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:51,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972541491] [2024-06-21 15:42:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:51,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972541491] [2024-06-21 15:42:51,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972541491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:51,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:51,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304720276] [2024-06-21 15:42:51,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:51,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:51,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:51,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:51,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 61 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:51,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:51,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:51,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:51,876 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-21 15:42:51,876 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-21 15:42:51,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 502 events. 265/502 cut-off events. For 8119/8119 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2312 event pairs, 33 based on Foata normal form. 9/511 useless extension candidates. Maximal degree in co-relation 2655. Up to 299 conditions per place. [2024-06-21 15:42:51,879 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 51 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-21 15:42:51,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 891 flow [2024-06-21 15:42:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 15:42:51,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-21 15:42:51,880 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 119 transitions. [2024-06-21 15:42:51,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 891 flow [2024-06-21 15:42:51,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 84 transitions, 843 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:51,889 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-21 15:42:51,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=537, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2024-06-21 15:42:51,890 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-21 15:42:51,890 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-21 15:42:51,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:51,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:51,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:51,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:42:51,891 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:51,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash -500152115, now seen corresponding path program 10 times [2024-06-21 15:42:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:51,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402238434] [2024-06-21 15:42:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:51,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:52,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402238434] [2024-06-21 15:42:52,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402238434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:52,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377956871] [2024-06-21 15:42:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:52,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:52,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:52,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 537 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:52,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:52,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:52,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:52,406 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-21 15:42:52,408 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-21 15:42:52,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 485 events. 254/485 cut-off events. For 7368/7372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2198 event pairs, 15 based on Foata normal form. 13/498 useless extension candidates. Maximal degree in co-relation 2470. Up to 282 conditions per place. [2024-06-21 15:42:52,412 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-21 15:42:52,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 823 flow [2024-06-21 15:42:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 15:42:52,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36990595611285265 [2024-06-21 15:42:52,414 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 118 transitions. [2024-06-21 15:42:52,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 823 flow [2024-06-21 15:42:52,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 785 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:52,424 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-21 15:42:52,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=474, PETRI_PLACES=98, PETRI_TRANSITIONS=53} [2024-06-21 15:42:52,425 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-21 15:42:52,425 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-21 15:42:52,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:52,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:52,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:42:52,426 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:52,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1064284101, now seen corresponding path program 11 times [2024-06-21 15:42:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22045644] [2024-06-21 15:42:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:52,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22045644] [2024-06-21 15:42:52,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22045644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:52,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:52,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:52,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484566496] [2024-06-21 15:42:52,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:52,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:52,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:52,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:52,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:52,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:52,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 53 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:52,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:52,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:52,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:52,940 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-21 15:42:52,940 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-21 15:42:52,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 441 events. 236/441 cut-off events. For 6492/6496 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1941 event pairs, 32 based on Foata normal form. 13/454 useless extension candidates. Maximal degree in co-relation 2301. Up to 261 conditions per place. [2024-06-21 15:42:52,943 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-21 15:42:52,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 758 flow [2024-06-21 15:42:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 15:42:52,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-21 15:42:52,944 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 117 transitions. [2024-06-21 15:42:52,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 758 flow [2024-06-21 15:42:52,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 692 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-21 15:42:52,953 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-21 15:42:52,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2024-06-21 15:42:52,954 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-21 15:42:52,954 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-21 15:42:52,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:52,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:52,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:52,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:42:52,955 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:52,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1071611571, now seen corresponding path program 12 times [2024-06-21 15:42:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:52,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469232369] [2024-06-21 15:42:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469232369] [2024-06-21 15:42:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469232369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:53,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:53,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526944164] [2024-06-21 15:42:53,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:53,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:53,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:53,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:53,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:53,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 410 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:53,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:53,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:53,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:53,430 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-21 15:42:53,430 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-21 15:42:53,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 407 events. 216/407 cut-off events. For 5037/5041 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1760 event pairs, 32 based on Foata normal form. 13/420 useless extension candidates. Maximal degree in co-relation 2022. Up to 241 conditions per place. [2024-06-21 15:42:53,433 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 41 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-21 15:42:53,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 684 flow [2024-06-21 15:42:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 15:42:53,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 15:42:53,434 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 114 transitions. [2024-06-21 15:42:53,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 684 flow [2024-06-21 15:42:53,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 644 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:53,442 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-21 15:42:53,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=83, PETRI_TRANSITIONS=48} [2024-06-21 15:42:53,442 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-21 15:42:53,443 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-21 15:42:53,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:53,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:53,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:53,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:42:53,443 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:53,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash -234734293, now seen corresponding path program 13 times [2024-06-21 15:42:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:53,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709105658] [2024-06-21 15:42:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:53,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:53,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709105658] [2024-06-21 15:42:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709105658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:53,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:53,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:53,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239135832] [2024-06-21 15:42:53,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:53,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:53,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:53,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:53,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 48 transitions, 388 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:53,942 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-21 15:42:53,942 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-21 15:42:53,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 388 events. 205/388 cut-off events. For 4228/4228 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1630 event pairs, 32 based on Foata normal form. 9/397 useless extension candidates. Maximal degree in co-relation 1855. Up to 224 conditions per place. [2024-06-21 15:42:53,944 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-21 15:42:53,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 628 flow [2024-06-21 15:42:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 15:42:53,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 15:42:53,945 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 113 transitions. [2024-06-21 15:42:53,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 628 flow [2024-06-21 15:42:53,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 598 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:53,951 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-21 15:42:53,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=346, PETRI_PLACES=81, PETRI_TRANSITIONS=44} [2024-06-21 15:42:53,952 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-21 15:42:53,952 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-21 15:42:53,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:53,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:53,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:42:53,953 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:53,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1354444655, now seen corresponding path program 14 times [2024-06-21 15:42:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:53,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103865518] [2024-06-21 15:42:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:54,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:54,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103865518] [2024-06-21 15:42:54,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103865518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:54,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:54,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:54,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276863442] [2024-06-21 15:42:54,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:54,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:54,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:54,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:54,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 346 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:54,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:54,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:54,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:54,386 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-21 15:42:54,386 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-21 15:42:54,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 361 events. 192/361 cut-off events. For 3766/3768 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1483 event pairs, 28 based on Foata normal form. 11/372 useless extension candidates. Maximal degree in co-relation 1742. Up to 189 conditions per place. [2024-06-21 15:42:54,388 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 35 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-21 15:42:54,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 646 flow [2024-06-21 15:42:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 15:42:54,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 15:42:54,389 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 116 transitions. [2024-06-21 15:42:54,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 646 flow [2024-06-21 15:42:54,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 588 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:54,394 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-21 15:42:54,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=75, PETRI_TRANSITIONS=41} [2024-06-21 15:42:54,394 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-21 15:42:54,395 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-21 15:42:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:54,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:54,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:42:54,395 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:54,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1352541875, now seen corresponding path program 15 times [2024-06-21 15:42:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:54,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067962135] [2024-06-21 15:42:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:54,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:54,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067962135] [2024-06-21 15:42:54,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067962135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:54,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:54,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:54,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057974440] [2024-06-21 15:42:54,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:54,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:54,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:54,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:54,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 41 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:54,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:54,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:54,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:54,872 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-21 15:42:54,872 INFO L125 PetriNetUnfolderBase]: For 2766/2768 co-relation queries the response was YES. [2024-06-21 15:42:54,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 329 events. 172/329 cut-off events. For 2766/2768 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1305 event pairs, 28 based on Foata normal form. 11/340 useless extension candidates. Maximal degree in co-relation 1459. Up to 169 conditions per place. [2024-06-21 15:42:54,874 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 33 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-21 15:42:54,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 540 flow [2024-06-21 15:42:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 15:42:54,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 15:42:54,883 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 113 transitions. [2024-06-21 15:42:54,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 540 flow [2024-06-21 15:42:54,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 506 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:54,888 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-21 15:42:54,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2024-06-21 15:42:54,888 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-21 15:42:54,888 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-21 15:42:54,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:54,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:54,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:42:54,889 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:54,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash -433142353, now seen corresponding path program 16 times [2024-06-21 15:42:54,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:54,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786577495] [2024-06-21 15:42:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:55,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:55,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786577495] [2024-06-21 15:42:55,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786577495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:55,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:55,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:55,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772629935] [2024-06-21 15:42:55,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:55,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:55,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:55,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:55,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:55,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:55,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:55,372 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-21 15:42:55,372 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-21 15:42:55,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 310 events. 161/310 cut-off events. For 2279/2279 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1199 event pairs, 10 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1316. Up to 152 conditions per place. [2024-06-21 15:42:55,374 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 29 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-21 15:42:55,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 494 flow [2024-06-21 15:42:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 15:42:55,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-21 15:42:55,375 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 112 transitions. [2024-06-21 15:42:55,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 494 flow [2024-06-21 15:42:55,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 466 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:55,379 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-21 15:42:55,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-21 15:42:55,380 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-21 15:42:55,380 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-21 15:42:55,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:55,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:55,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:55,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:42:55,381 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:55,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1696999155, now seen corresponding path program 17 times [2024-06-21 15:42:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:55,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689559282] [2024-06-21 15:42:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:55,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:55,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:55,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689559282] [2024-06-21 15:42:55,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689559282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:55,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:55,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264408854] [2024-06-21 15:42:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:55,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:55,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:55,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:55,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:55,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:55,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:55,808 INFO L124 PetriNetUnfolderBase]: 147/282 cut-off events. [2024-06-21 15:42:55,808 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2024-06-21 15:42:55,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 282 events. 147/282 cut-off events. For 2031/2031 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1053 event pairs, 6 based on Foata normal form. 9/291 useless extension candidates. Maximal degree in co-relation 1203. Up to 131 conditions per place. [2024-06-21 15:42:55,809 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 8 changer transitions 19/56 dead transitions. [2024-06-21 15:42:55,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 459 flow [2024-06-21 15:42:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 15:42:55,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 15:42:55,810 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 114 transitions. [2024-06-21 15:42:55,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 459 flow [2024-06-21 15:42:55,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 408 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 15:42:55,813 INFO L231 Difference]: Finished difference. Result has 61 places, 30 transitions, 192 flow [2024-06-21 15:42:55,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=30} [2024-06-21 15:42:55,813 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-21 15:42:55,813 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 30 transitions, 192 flow [2024-06-21 15:42:55,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:55,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:55,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:42:55,814 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:55,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1946349825, now seen corresponding path program 18 times [2024-06-21 15:42:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:55,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787600097] [2024-06-21 15:42:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:56,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:56,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787600097] [2024-06-21 15:42:56,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787600097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:56,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:56,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:56,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909886202] [2024-06-21 15:42:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:56,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:56,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:56,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:56,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 30 transitions, 192 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:56,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:56,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:56,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:56,226 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2024-06-21 15:42:56,226 INFO L125 PetriNetUnfolderBase]: For 1345/1353 co-relation queries the response was YES. [2024-06-21 15:42:56,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 225 events. 118/225 cut-off events. For 1345/1353 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 775 event pairs, 24 based on Foata normal form. 17/242 useless extension candidates. Maximal degree in co-relation 905. Up to 110 conditions per place. [2024-06-21 15:42:56,226 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 21 selfloop transitions, 7 changer transitions 18/49 dead transitions. [2024-06-21 15:42:56,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 368 flow [2024-06-21 15:42:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 15:42:56,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-21 15:42:56,227 INFO L175 Difference]: Start difference. First operand has 61 places, 30 transitions, 192 flow. Second operand 11 states and 109 transitions. [2024-06-21 15:42:56,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 368 flow [2024-06-21 15:42:56,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 336 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 15:42:56,229 INFO L231 Difference]: Finished difference. Result has 55 places, 27 transitions, 153 flow [2024-06-21 15:42:56,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=27} [2024-06-21 15:42:56,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 15:42:56,229 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions, 153 flow [2024-06-21 15:42:56,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:56,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:56,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:56,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:42:56,230 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:56,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:56,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1953672645, now seen corresponding path program 19 times [2024-06-21 15:42:56,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:56,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380243781] [2024-06-21 15:42:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:56,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:56,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:56,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380243781] [2024-06-21 15:42:56,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380243781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:56,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:56,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745252069] [2024-06-21 15:42:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:56,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:56,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:56,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:56,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 27 transitions, 153 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:56,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:56,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:56,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:56,647 INFO L124 PetriNetUnfolderBase]: 98/191 cut-off events. [2024-06-21 15:42:56,648 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-06-21 15:42:56,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 191 events. 98/191 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 639 event pairs, 24 based on Foata normal form. 9/200 useless extension candidates. Maximal degree in co-relation 720. Up to 90 conditions per place. [2024-06-21 15:42:56,648 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 19 selfloop transitions, 8 changer transitions 13/43 dead transitions. [2024-06-21 15:42:56,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 43 transitions, 299 flow [2024-06-21 15:42:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-21 15:42:56,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-21 15:42:56,649 INFO L175 Difference]: Start difference. First operand has 55 places, 27 transitions, 153 flow. Second operand 11 states and 106 transitions. [2024-06-21 15:42:56,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 43 transitions, 299 flow [2024-06-21 15:42:56,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 265 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 15:42:56,650 INFO L231 Difference]: Finished difference. Result has 49 places, 25 transitions, 130 flow [2024-06-21 15:42:56,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=25} [2024-06-21 15:42:56,651 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-21 15:42:56,651 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 25 transitions, 130 flow [2024-06-21 15:42:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:56,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:42:56,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:42:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:42:56,651 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:42:56,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:42:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1953677295, now seen corresponding path program 20 times [2024-06-21 15:42:56,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:42:56,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016717192] [2024-06-21 15:42:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:42:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:42:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:42:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:42:56,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:42:56,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016717192] [2024-06-21 15:42:56,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016717192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:42:56,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:42:56,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 15:42:56,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806355523] [2024-06-21 15:42:56,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:42:56,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 15:42:56,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:42:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 15:42:56,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 15:42:56,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 15:42:56,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 25 transitions, 130 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:56,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:42:56,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 15:42:56,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:42:57,021 INFO L124 PetriNetUnfolderBase]: 42/96 cut-off events. [2024-06-21 15:42:57,021 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-06-21 15:42:57,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 96 events. 42/96 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 221 event pairs, 0 based on Foata normal form. 9/105 useless extension candidates. Maximal degree in co-relation 306. Up to 51 conditions per place. [2024-06-21 15:42:57,021 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2024-06-21 15:42:57,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 33 transitions, 204 flow [2024-06-21 15:42:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:42:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:42:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-06-21 15:42:57,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30407523510971785 [2024-06-21 15:42:57,022 INFO L175 Difference]: Start difference. First operand has 49 places, 25 transitions, 130 flow. Second operand 11 states and 97 transitions. [2024-06-21 15:42:57,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 33 transitions, 204 flow [2024-06-21 15:42:57,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 180 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 15:42:57,023 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 15:42:57,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-21 15:42:57,024 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-21 15:42:57,024 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 15:42:57,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:42:57,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 15:42:57,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 15:42:57,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 15:42:57,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 15:42:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:42:57,026 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-21 15:42:57,029 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 15:42:57,029 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 15:42:57,032 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 15:42:57,032 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 15:42:57,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 03:42:57 BasicIcfg [2024-06-21 15:42:57,033 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 15:42:57,033 INFO L158 Benchmark]: Toolchain (without parser) took 27689.07ms. Allocated memory was 138.4MB in the beginning and 358.6MB in the end (delta: 220.2MB). Free memory was 80.9MB in the beginning and 148.0MB in the end (delta: -67.1MB). Peak memory consumption was 154.9MB. Max. memory is 16.1GB. [2024-06-21 15:42:57,033 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 98.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:42:57,034 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 138.4MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:42:57,034 INFO L158 Benchmark]: CACSL2BoogieTranslator took 646.11ms. Allocated memory is still 138.4MB. Free memory was 80.6MB in the beginning and 108.0MB in the end (delta: -27.4MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. [2024-06-21 15:42:57,034 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.65ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 108.0MB in the beginning and 176.8MB in the end (delta: -68.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2024-06-21 15:42:57,034 INFO L158 Benchmark]: Boogie Preprocessor took 58.76ms. Allocated memory is still 205.5MB. Free memory was 176.8MB in the beginning and 174.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:42:57,035 INFO L158 Benchmark]: RCFGBuilder took 475.37ms. Allocated memory is still 205.5MB. Free memory was 174.7MB in the beginning and 148.5MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 15:42:57,035 INFO L158 Benchmark]: TraceAbstraction took 26426.05ms. Allocated memory was 205.5MB in the beginning and 358.6MB in the end (delta: 153.1MB). Free memory was 147.4MB in the beginning and 148.0MB in the end (delta: -583.5kB). Peak memory consumption was 151.5MB. Max. memory is 16.1GB. [2024-06-21 15:42:57,036 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 98.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.16ms. Allocated memory is still 138.4MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 646.11ms. Allocated memory is still 138.4MB. Free memory was 80.6MB in the beginning and 108.0MB in the end (delta: -27.4MB). Peak memory consumption was 32.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.65ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 108.0MB in the beginning and 176.8MB in the end (delta: -68.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.76ms. Allocated memory is still 205.5MB. Free memory was 176.8MB in the beginning and 174.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.37ms. Allocated memory is still 205.5MB. Free memory was 174.7MB in the beginning and 148.5MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 26426.05ms. Allocated memory was 205.5MB in the beginning and 358.6MB in the end (delta: 153.1MB). Free memory was 147.4MB in the beginning and 148.0MB in the end (delta: -583.5kB). Peak memory consumption was 151.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 721]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 722]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 26.3s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 11.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3383 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2951 mSDsluCounter, 570 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 463 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15419 IncrementalHoareTripleChecker+Invalid, 15882 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 463 mSolverCounterUnsat, 102 mSDtfsCounter, 15419 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=966occurred in iteration=30, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 902 NumberOfCodeBlocks, 902 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 851 ConstructedInterpolants, 0 QuantifiedInterpolants, 17720 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 51 InterpolantComputations, 51 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 15:42:57,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE