./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/fib_unsafe-10.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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_unsafe-10.i ./goblint.2024-05-21_14-57-05.files/protection/fib_unsafe-10.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-bcb38a6-m [2024-06-03 19:02:13,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:02:13,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:02:13,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:02:13,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:02:13,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:02:13,905 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:02:13,905 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:02:13,906 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:02:13,909 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:02:13,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:02:13,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:02:13,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:02:13,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:02:13,912 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:02:13,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:02:13,912 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:02:13,912 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:02:13,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:02:13,913 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:02:13,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:02:13,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:02:13,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:02:13,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:02:13,914 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:02:13,914 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:02:13,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:02:13,914 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:02:13,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:02:13,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:02:13,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:02:13,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:02:13,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:02:13,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:02:13,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:02:13,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:02:13,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:02:13,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:02:14,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:02:14,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:02:14,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:02:14,143 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:02:14,144 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:02:14,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/fib_unsafe-10.yml/witness.yml [2024-06-03 19:02:14,274 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:02:14,274 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:02:14,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i [2024-06-03 19:02:15,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:02:15,496 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:02:15,498 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i [2024-06-03 19:02:15,508 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c04220a/32482bc17fc64aea81d98db3e7ba2156/FLAG1b69ec01b [2024-06-03 19:02:15,544 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c04220a/32482bc17fc64aea81d98db3e7ba2156 [2024-06-03 19:02:15,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:02:15,546 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:02:15,546 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:02:15,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:02:15,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:02:15,551 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:02:14" (1/2) ... [2024-06-03 19:02:15,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1323c37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:02:15, skipping insertion in model container [2024-06-03 19:02:15,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:02:14" (1/2) ... [2024-06-03 19:02:15,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74a1c697 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:02:15, skipping insertion in model container [2024-06-03 19:02:15,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:02:15" (2/2) ... [2024-06-03 19:02:15,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1323c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15, skipping insertion in model container [2024-06-03 19:02:15,554 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:02:15" (2/2) ... [2024-06-03 19:02:15,554 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:02:15,577 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:02:15,578 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) [2024-06-03 19:02:15,578 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) [2024-06-03 19:02:15,579 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:02:15,579 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-03 19:02:15,600 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:02:15,807 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:02:15,813 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:02:15,875 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:02:15,898 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:02:15,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15 WrapperNode [2024-06-03 19:02:15,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:02:15,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:02:15,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:02:15,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:02:15,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,939 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-03 19:02:15,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:02:15,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:02:15,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:02:15,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:02:15,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,951 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,961 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]. [2024-06-03 19:02:15,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:02:15,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:02:15,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:02:15,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:02:15,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (1/1) ... [2024-06-03 19:02:15,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:02:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:02:16,007 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) [2024-06-03 19:02:16,009 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 [2024-06-03 19:02:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-03 19:02:16,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-03 19:02:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-03 19:02:16,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-03 19:02:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:02:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:02:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:02:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:02:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:02:16,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:02:16,035 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:02:16,118 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:02:16,120 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:02:16,256 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:02:16,257 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:02:16,334 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:02:16,334 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-03 19:02:16,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:02:16 BoogieIcfgContainer [2024-06-03 19:02:16,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:02:16,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:02:16,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:02:16,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:02:16,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:02:14" (1/4) ... [2024-06-03 19:02:16,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ce8179 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:02:16, skipping insertion in model container [2024-06-03 19:02:16,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:02:15" (2/4) ... [2024-06-03 19:02:16,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ce8179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:02:16, skipping insertion in model container [2024-06-03 19:02:16,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:02:15" (3/4) ... [2024-06-03 19:02:16,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ce8179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:02:16, skipping insertion in model container [2024-06-03 19:02:16,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:02:16" (4/4) ... [2024-06-03 19:02:16,343 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2024-06-03 19:02:16,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:02:16,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 19:02:16,357 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:02:16,389 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:02:16,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-03 19:02:16,443 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-03 19:02:16,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:02:16,453 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. [2024-06-03 19:02:16,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-03 19:02:16,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-03 19:02:16,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:02:16,466 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;@5f9ea890, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:02:16,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 19:02:16,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:02:16,470 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-03 19:02:16,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:02:16,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:16,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:16,471 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)] === [2024-06-03 19:02:16,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash 259354094, now seen corresponding path program 1 times [2024-06-03 19:02:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634281638] [2024-06-03 19:02:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:16,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:16,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634281638] [2024-06-03 19:02:16,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634281638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:16,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:16,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:02:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920180366] [2024-06-03 19:02:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:16,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:02:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:17,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:02:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:02:17,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:17,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:17,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:17,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:17,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:17,166 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-03 19:02:17,166 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-03 19:02:17,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 536 events. 322/536 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2114 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. [2024-06-03 19:02:17,171 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 34 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-03 19:02:17,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 227 flow [2024-06-03 19:02:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:02:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:02:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-03 19:02:17,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-03 19:02:17,182 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 85 transitions. [2024-06-03 19:02:17,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 227 flow [2024-06-03 19:02:17,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 19:02:17,186 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-03 19:02:17,187 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} [2024-06-03 19:02:17,190 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-03 19:02:17,190 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-03 19:02:17,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:17,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:17,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:02:17,191 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)] === [2024-06-03 19:02:17,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash -227696702, now seen corresponding path program 1 times [2024-06-03 19:02:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497645524] [2024-06-03 19:02:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:17,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497645524] [2024-06-03 19:02:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497645524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:17,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:02:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245651760] [2024-06-03 19:02:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:02:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:02:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:02:17,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:17,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:17,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:17,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:17,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:17,617 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-03 19:02:17,618 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-03 19:02:17,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 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 1094 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. [2024-06-03 19:02:17,620 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 42 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-03 19:02:17,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 291 flow [2024-06-03 19:02:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:02:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:02:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-03 19:02:17,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-06-03 19:02:17,626 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 92 transitions. [2024-06-03 19:02:17,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 291 flow [2024-06-03 19:02:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 19:02:17,630 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-03 19:02:17,630 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} [2024-06-03 19:02:17,631 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-03 19:02:17,631 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-03 19:02:17,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:17,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:17,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:02:17,633 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)] === [2024-06-03 19:02:17,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1531337612, now seen corresponding path program 1 times [2024-06-03 19:02:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522598179] [2024-06-03 19:02:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:17,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522598179] [2024-06-03 19:02:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522598179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:17,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:17,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:02:17,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452374387] [2024-06-03 19:02:17,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:17,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:02:17,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:17,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:02:17,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:02:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-03 19:02:17,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:17,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:18,021 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-03 19:02:18,021 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-03 19:02:18,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 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 967 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. [2024-06-03 19:02:18,025 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-03 19:02:18,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 366 flow [2024-06-03 19:02:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:02:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:02:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-03 19:02:18,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267241379310345 [2024-06-03 19:02:18,029 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 99 transitions. [2024-06-03 19:02:18,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 366 flow [2024-06-03 19:02:18,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 346 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 19:02:18,034 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-03 19:02:18,035 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} [2024-06-03 19:02:18,036 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-03 19:02:18,036 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-03 19:02:18,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-03 19:02:18,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:18,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:18,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:02:18,037 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)] === [2024-06-03 19:02:18,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash 58741636, now seen corresponding path program 1 times [2024-06-03 19:02:18,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893830982] [2024-06-03 19:02:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893830982] [2024-06-03 19:02:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893830982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:02:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659000072] [2024-06-03 19:02:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:02:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:02:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:02:18,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:18,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:18,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:18,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:18,337 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-03 19:02:18,338 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-03 19:02:18,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 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. [2024-06-03 19:02:18,340 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-03 19:02:18,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 348 flow [2024-06-03 19:02:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:02:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:02:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-03 19:02:18,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-03 19:02:18,341 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 78 transitions. [2024-06-03 19:02:18,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 348 flow [2024-06-03 19:02:18,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 320 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:02:18,345 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-03 19:02:18,346 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} [2024-06-03 19:02:18,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-03 19:02:18,347 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-03 19:02:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:18,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:02:18,347 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)] === [2024-06-03 19:02:18,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1820991533, now seen corresponding path program 1 times [2024-06-03 19:02:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:18,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862847788] [2024-06-03 19:02:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:18,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862847788] [2024-06-03 19:02:18,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862847788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:18,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:18,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:02:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621144894] [2024-06-03 19:02:18,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:18,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:02:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:02:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:02:18,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:18,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) [2024-06-03 19:02:18,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:18,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:18,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:18,689 INFO L124 PetriNetUnfolderBase]: 151/289 cut-off events. [2024-06-03 19:02:18,690 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-03 19:02:18,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 289 events. 151/289 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 996 event pairs, 31 based on Foata normal form. 9/297 useless extension candidates. Maximal degree in co-relation 991. Up to 176 conditions per place. [2024-06-03 19:02:18,691 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 33 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-03 19:02:18,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 349 flow [2024-06-03 19:02:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:02:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:02:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-03 19:02:18,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-03 19:02:18,693 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 82 transitions. [2024-06-03 19:02:18,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 349 flow [2024-06-03 19:02:18,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:02:18,695 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-03 19:02:18,695 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} [2024-06-03 19:02:18,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-03 19:02:18,696 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-03 19:02:18,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 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) [2024-06-03 19:02:18,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:18,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:18,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:02:18,697 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)] === [2024-06-03 19:02:18,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -124043924, now seen corresponding path program 1 times [2024-06-03 19:02:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:18,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306813505] [2024-06-03 19:02:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:18,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:18,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:18,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306813505] [2024-06-03 19:02:18,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306813505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:18,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:18,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:02:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130362601] [2024-06-03 19:02:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:02:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:02:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:02:18,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:18,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 218 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:18,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:18,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:18,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:18,984 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-03 19:02:18,984 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-03 19:02:18,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 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 1062 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. [2024-06-03 19:02:18,986 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-03 19:02:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 421 flow [2024-06-03 19:02:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:02:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:02:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-03 19:02:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-06-03 19:02:18,987 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 98 transitions. [2024-06-03 19:02:18,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 421 flow [2024-06-03 19:02:18,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 393 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 19:02:18,990 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-03 19:02:18,990 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} [2024-06-03 19:02:18,990 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-03 19:02:18,991 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-03 19:02:18,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:18,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:18,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:02:18,991 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)] === [2024-06-03 19:02:18,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1747540272, now seen corresponding path program 2 times [2024-06-03 19:02:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031617739] [2024-06-03 19:02:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:18,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:19,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031617739] [2024-06-03 19:02:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031617739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:19,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:02:19,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561301189] [2024-06-03 19:02:19,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:19,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:02:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:02:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:02:19,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:19,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 266 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:19,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:19,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:19,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:19,278 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-03 19:02:19,278 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-06-03 19:02:19,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 314 events. 166/314 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1125 event pairs, 34 based on Foata normal form. 3/316 useless extension candidates. Maximal degree in co-relation 1196. Up to 192 conditions per place. [2024-06-03 19:02:19,280 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 39 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-03 19:02:19,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 484 flow [2024-06-03 19:02:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:02:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:02:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-03 19:02:19,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-06-03 19:02:19,282 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 92 transitions. [2024-06-03 19:02:19,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 484 flow [2024-06-03 19:02:19,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 443 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:02:19,285 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-03 19:02:19,285 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} [2024-06-03 19:02:19,285 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-03 19:02:19,285 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-03 19:02:19,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:19,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:19,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:19,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:02:19,286 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)] === [2024-06-03 19:02:19,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1553674328, now seen corresponding path program 3 times [2024-06-03 19:02:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:19,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836472573] [2024-06-03 19:02:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:19,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836472573] [2024-06-03 19:02:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836472573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:19,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:02:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464203216] [2024-06-03 19:02:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:02:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:02:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:02:19,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:19,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 344 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:19,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:19,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:19,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:19,612 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-03 19:02:19,613 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2024-06-03 19:02:19,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 327 events. 172/327 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1195 event pairs, 31 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 1325. Up to 199 conditions per place. [2024-06-03 19:02:19,615 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-03 19:02:19,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 564 flow [2024-06-03 19:02:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:02:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:02:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-03 19:02:19,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-03 19:02:19,616 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 94 transitions. [2024-06-03 19:02:19,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 564 flow [2024-06-03 19:02:19,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 537 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:02:19,619 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-03 19:02:19,619 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} [2024-06-03 19:02:19,620 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-03 19:02:19,620 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-03 19:02:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:19,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:19,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:19,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:02:19,621 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)] === [2024-06-03 19:02:19,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1748134918, now seen corresponding path program 4 times [2024-06-03 19:02:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:19,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937466919] [2024-06-03 19:02:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937466919] [2024-06-03 19:02:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937466919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:19,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:19,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:02:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491168689] [2024-06-03 19:02:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:19,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:02:19,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:19,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:02:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:02:19,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:19,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 417 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:19,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:19,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:19,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:19,949 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-03 19:02:19,949 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-03 19:02:19,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1511 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 1280 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. [2024-06-03 19:02:19,951 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-03 19:02:19,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 649 flow [2024-06-03 19:02:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:02:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:02:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-03 19:02:19,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-03 19:02:19,952 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 95 transitions. [2024-06-03 19:02:19,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 649 flow [2024-06-03 19:02:19,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 607 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 19:02:19,957 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-03 19:02:19,957 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} [2024-06-03 19:02:19,957 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-03 19:02:19,958 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-03 19:02:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:19,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:19,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:19,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:02:19,958 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)] === [2024-06-03 19:02:19,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1742778672, now seen corresponding path program 5 times [2024-06-03 19:02:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132132165] [2024-06-03 19:02:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:20,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:20,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132132165] [2024-06-03 19:02:20,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132132165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:20,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:20,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:02:20,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339821273] [2024-06-03 19:02:20,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:20,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:02:20,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:02:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:02:20,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:20,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 471 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:20,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:20,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:20,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:20,268 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-03 19:02:20,268 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-03 19:02:20,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 340 events. 181/340 cut-off events. For 1490/1490 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1269 event pairs, 32 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 1567. Up to 211 conditions per place. [2024-06-03 19:02:20,270 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 48 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-03 19:02:20,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 689 flow [2024-06-03 19:02:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:02:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:02:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-03 19:02:20,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486590038314176 [2024-06-03 19:02:20,272 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 91 transitions. [2024-06-03 19:02:20,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 689 flow [2024-06-03 19:02:20,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 649 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:02:20,277 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-03 19:02:20,277 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} [2024-06-03 19:02:20,279 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-03 19:02:20,279 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-03 19:02:20,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:20,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:20,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:20,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:02:20,280 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)] === [2024-06-03 19:02:20,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1920923892, now seen corresponding path program 6 times [2024-06-03 19:02:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:20,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089731325] [2024-06-03 19:02:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:20,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:20,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089731325] [2024-06-03 19:02:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089731325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:20,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:20,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:02:20,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850402844] [2024-06-03 19:02:20,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:20,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:02:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:02:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:02:20,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:20,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:20,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:20,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:20,582 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-03 19:02:20,583 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-03 19:02:20,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 340 events. 181/340 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1273 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. [2024-06-03 19:02:20,585 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 50 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-03 19:02:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 757 flow [2024-06-03 19:02:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:02:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:02:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-03 19:02:20,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-03 19:02:20,586 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 93 transitions. [2024-06-03 19:02:20,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 757 flow [2024-06-03 19:02:20,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 701 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:02:20,591 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-03 19:02:20,591 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} [2024-06-03 19:02:20,591 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-03 19:02:20,591 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-03 19:02:20,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:20,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:20,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:20,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:02:20,596 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)] === [2024-06-03 19:02:20,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1820825740, now seen corresponding path program 1 times [2024-06-03 19:02:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:20,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842164739] [2024-06-03 19:02:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:20,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:20,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842164739] [2024-06-03 19:02:20,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842164739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:20,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:20,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953142353] [2024-06-03 19:02:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:20,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:20,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:20,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:20,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:20,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:20,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:20,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:20,951 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-03 19:02:20,952 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-03 19:02:20,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 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 1475 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. [2024-06-03 19:02:20,954 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-03 19:02:20,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 954 flow [2024-06-03 19:02:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-03 19:02:20,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-03 19:02:20,957 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 112 transitions. [2024-06-03 19:02:20,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 954 flow [2024-06-03 19:02:20,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 871 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:20,963 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-03 19:02:20,963 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} [2024-06-03 19:02:20,963 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-03 19:02:20,963 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-03 19:02:20,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:20,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:20,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:20,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:02:20,980 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)] === [2024-06-03 19:02:20,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash -986004792, now seen corresponding path program 2 times [2024-06-03 19:02:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:20,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297752123] [2024-06-03 19:02:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:20,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:21,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297752123] [2024-06-03 19:02:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297752123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:21,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:21,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408923518] [2024-06-03 19:02:21,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:21,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:21,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 579 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:21,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:21,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:21,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:21,338 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-03 19:02:21,338 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-03 19:02:21,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 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 1684 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. [2024-06-03 19:02:21,341 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-03 19:02:21,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 923 flow [2024-06-03 19:02:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-03 19:02:21,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-03 19:02:21,343 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 110 transitions. [2024-06-03 19:02:21,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 923 flow [2024-06-03 19:02:21,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 856 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 19:02:21,350 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-03 19:02:21,350 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} [2024-06-03 19:02:21,350 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-03 19:02:21,351 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-03 19:02:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:21,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:21,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:02:21,351 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)] === [2024-06-03 19:02:21,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash -985943412, now seen corresponding path program 3 times [2024-06-03 19:02:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370710654] [2024-06-03 19:02:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:21,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370710654] [2024-06-03 19:02:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370710654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:21,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:21,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999207604] [2024-06-03 19:02:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:21,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:21,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:21,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 602 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:21,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:21,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:21,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:21,692 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-03 19:02:21,692 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-03 19:02:21,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 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 1747 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. [2024-06-03 19:02:21,695 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-03 19:02:21,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 899 flow [2024-06-03 19:02:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-03 19:02:21,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-03 19:02:21,696 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 108 transitions. [2024-06-03 19:02:21,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 899 flow [2024-06-03 19:02:21,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 851 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 19:02:21,702 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-03 19:02:21,702 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} [2024-06-03 19:02:21,702 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-03 19:02:21,703 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-03 19:02:21,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:21,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:02:21,703 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)] === [2024-06-03 19:02:21,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -985943257, now seen corresponding path program 1 times [2024-06-03 19:02:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946248155] [2024-06-03 19:02:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946248155] [2024-06-03 19:02:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946248155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:21,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370292784] [2024-06-03 19:02:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:21,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:21,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:21,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:21,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:21,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:21,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:22,047 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-03 19:02:22,047 INFO L125 PetriNetUnfolderBase]: For 3834/3838 co-relation queries the response was YES. [2024-06-03 19:02:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 444 events. 235/444 cut-off events. For 3834/3838 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1876 event pairs, 34 based on Foata normal form. 7/451 useless extension candidates. Maximal degree in co-relation 2349. Up to 280 conditions per place. [2024-06-03 19:02:22,051 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 62 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-03 19:02:22,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 911 flow [2024-06-03 19:02:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-03 19:02:22,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-03 19:02:22,053 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 108 transitions. [2024-06-03 19:02:22,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 911 flow [2024-06-03 19:02:22,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 857 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:22,068 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-03 19:02:22,069 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} [2024-06-03 19:02:22,069 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-03 19:02:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-03 19:02:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:22,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:22,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:02:22,070 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)] === [2024-06-03 19:02:22,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1648791833, now seen corresponding path program 2 times [2024-06-03 19:02:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128407783] [2024-06-03 19:02:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:22,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:22,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128407783] [2024-06-03 19:02:22,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128407783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:22,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:22,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:22,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585940955] [2024-06-03 19:02:22,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:22,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:22,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:22,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:22,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:22,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:22,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:22,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:22,420 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-03 19:02:22,421 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-03 19:02:22,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532 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 1945 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. [2024-06-03 19:02:22,424 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-03 19:02:22,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 921 flow [2024-06-03 19:02:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 19:02:22,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 19:02:22,425 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 104 transitions. [2024-06-03 19:02:22,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 921 flow [2024-06-03 19:02:22,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 859 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:22,434 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-03 19:02:22,434 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} [2024-06-03 19:02:22,435 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-03 19:02:22,435 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-03 19:02:22,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:22,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:22,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:22,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:02:22,437 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)] === [2024-06-03 19:02:22,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1648795708, now seen corresponding path program 4 times [2024-06-03 19:02:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165183117] [2024-06-03 19:02:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165183117] [2024-06-03 19:02:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165183117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561795633] [2024-06-03 19:02:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:22,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:22,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:22,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:22,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:22,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:22,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:22,811 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-03 19:02:22,811 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-03 19:02:22,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2755 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 2134 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. [2024-06-03 19:02:22,815 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-03 19:02:22,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1009 flow [2024-06-03 19:02:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-03 19:02:22,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-03 19:02:22,816 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 106 transitions. [2024-06-03 19:02:22,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1009 flow [2024-06-03 19:02:22,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 955 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:22,825 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-03 19:02:22,825 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} [2024-06-03 19:02:22,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-03 19:02:22,825 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-03 19:02:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:22,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:22,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:22,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:02:22,826 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)] === [2024-06-03 19:02:22,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1790001328, now seen corresponding path program 5 times [2024-06-03 19:02:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:22,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721570173] [2024-06-03 19:02:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:22,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:23,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721570173] [2024-06-03 19:02:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721570173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:23,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:23,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727600760] [2024-06-03 19:02:23,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:23,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:23,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:23,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:23,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:23,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:23,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:23,219 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-03 19:02:23,220 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-03 19:02:23,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 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 2255 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. [2024-06-03 19:02:23,224 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-03 19:02:23,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 988 flow [2024-06-03 19:02:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 19:02:23,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 19:02:23,226 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 104 transitions. [2024-06-03 19:02:23,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 988 flow [2024-06-03 19:02:23,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 944 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:02:23,234 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-03 19:02:23,235 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} [2024-06-03 19:02:23,235 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-03 19:02:23,236 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-03 19:02:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:23,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:23,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:23,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:02:23,237 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)] === [2024-06-03 19:02:23,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1642155353, now seen corresponding path program 3 times [2024-06-03 19:02:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:23,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539900777] [2024-06-03 19:02:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:23,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539900777] [2024-06-03 19:02:23,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539900777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:23,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:23,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55389938] [2024-06-03 19:02:23,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:23,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:23,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:23,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:23,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:23,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:23,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:23,650 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-03 19:02:23,650 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-03 19:02:23,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 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 2459 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. [2024-06-03 19:02:23,654 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-03 19:02:23,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1029 flow [2024-06-03 19:02:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-03 19:02:23,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689655172413793 [2024-06-03 19:02:23,656 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 107 transitions. [2024-06-03 19:02:23,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1029 flow [2024-06-03 19:02:23,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 979 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:23,665 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-03 19:02:23,666 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} [2024-06-03 19:02:23,666 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-03 19:02:23,666 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-03 19:02:23,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:23,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:23,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:02:23,667 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)] === [2024-06-03 19:02:23,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:23,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1642391728, now seen corresponding path program 6 times [2024-06-03 19:02:23,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:23,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132234122] [2024-06-03 19:02:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132234122] [2024-06-03 19:02:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132234122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:23,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:23,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138936374] [2024-06-03 19:02:23,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:23,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:23,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:23,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:23,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 74 transitions, 743 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:23,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:23,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:23,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:24,031 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-03 19:02:24,031 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-03 19:02:24,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 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 2580 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. [2024-06-03 19:02:24,035 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-03 19:02:24,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1058 flow [2024-06-03 19:02:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 19:02:24,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 19:02:24,036 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 104 transitions. [2024-06-03 19:02:24,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1058 flow [2024-06-03 19:02:24,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 1015 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:02:24,048 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-03 19:02:24,048 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} [2024-06-03 19:02:24,048 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-03 19:02:24,049 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-03 19:02:24,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:24,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:24,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:24,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:02:24,049 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)] === [2024-06-03 19:02:24,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1642391573, now seen corresponding path program 4 times [2024-06-03 19:02:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:24,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859735004] [2024-06-03 19:02:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:24,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:24,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:24,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859735004] [2024-06-03 19:02:24,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859735004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:24,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:24,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404507824] [2024-06-03 19:02:24,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:24,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:24,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:24,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:24,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:24,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:24,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:24,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:24,469 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-03 19:02:24,469 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-03 19:02:24,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3389 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 2657 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. [2024-06-03 19:02:24,473 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-03 19:02:24,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1063 flow [2024-06-03 19:02:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 19:02:24,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 19:02:24,475 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 104 transitions. [2024-06-03 19:02:24,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1063 flow [2024-06-03 19:02:24,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 1013 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:24,486 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-03 19:02:24,486 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} [2024-06-03 19:02:24,487 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-03 19:02:24,487 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-03 19:02:24,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:24,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:24,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:02:24,487 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)] === [2024-06-03 19:02:24,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -802309495, now seen corresponding path program 5 times [2024-06-03 19:02:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:24,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905895296] [2024-06-03 19:02:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:24,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:24,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905895296] [2024-06-03 19:02:24,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905895296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:24,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:24,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635443478] [2024-06-03 19:02:24,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:24,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:24,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:24,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 76 transitions, 795 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:24,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:24,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:24,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:24,883 INFO L124 PetriNetUnfolderBase]: 325/604 cut-off events. [2024-06-03 19:02:24,883 INFO L125 PetriNetUnfolderBase]: For 8521/8525 co-relation queries the response was YES. [2024-06-03 19:02:24,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 604 events. 325/604 cut-off events. For 8521/8525 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2864 event pairs, 41 based on Foata normal form. 13/616 useless extension candidates. Maximal degree in co-relation 3526. Up to 429 conditions per place. [2024-06-03 19:02:24,887 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-03 19:02:24,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1109 flow [2024-06-03 19:02:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 19:02:24,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 19:02:24,888 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 104 transitions. [2024-06-03 19:02:24,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1109 flow [2024-06-03 19:02:24,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 1049 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:24,900 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-03 19:02:24,901 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} [2024-06-03 19:02:24,901 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-03 19:02:24,901 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-03 19:02:24,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:24,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:24,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:24,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:02:24,902 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)] === [2024-06-03 19:02:24,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1660825599, now seen corresponding path program 6 times [2024-06-03 19:02:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:24,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236829994] [2024-06-03 19:02:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236829994] [2024-06-03 19:02:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236829994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:25,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:25,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:25,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837758815] [2024-06-03 19:02:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:25,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:25,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:25,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:25,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:25,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:25,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:25,277 INFO L124 PetriNetUnfolderBase]: 334/621 cut-off events. [2024-06-03 19:02:25,277 INFO L125 PetriNetUnfolderBase]: For 9475/9479 co-relation queries the response was YES. [2024-06-03 19:02:25,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3754 conditions, 621 events. 334/621 cut-off events. For 9475/9479 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2960 event pairs, 41 based on Foata normal form. 7/627 useless extension candidates. Maximal degree in co-relation 3687. Up to 445 conditions per place. [2024-06-03 19:02:25,282 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-03 19:02:25,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1105 flow [2024-06-03 19:02:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 19:02:25,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 19:02:25,283 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 101 transitions. [2024-06-03 19:02:25,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1105 flow [2024-06-03 19:02:25,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 1057 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:02:25,297 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-03 19:02:25,297 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} [2024-06-03 19:02:25,298 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-03 19:02:25,298 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-03 19:02:25,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:25,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:25,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:25,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:02:25,298 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)] === [2024-06-03 19:02:25,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1660825754, now seen corresponding path program 7 times [2024-06-03 19:02:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:25,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287700577] [2024-06-03 19:02:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:25,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287700577] [2024-06-03 19:02:25,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287700577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:25,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:25,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:25,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430281039] [2024-06-03 19:02:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:25,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:25,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:25,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:25,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 847 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:25,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:25,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:25,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:25,684 INFO L124 PetriNetUnfolderBase]: 343/636 cut-off events. [2024-06-03 19:02:25,685 INFO L125 PetriNetUnfolderBase]: For 10506/10510 co-relation queries the response was YES. [2024-06-03 19:02:25,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3925 conditions, 636 events. 343/636 cut-off events. For 10506/10510 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3027 event pairs, 45 based on Foata normal form. 7/642 useless extension candidates. Maximal degree in co-relation 3856. Up to 460 conditions per place. [2024-06-03 19:02:25,689 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-03 19:02:25,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1170 flow [2024-06-03 19:02:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 19:02:25,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 19:02:25,691 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 101 transitions. [2024-06-03 19:02:25,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1170 flow [2024-06-03 19:02:25,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 97 transitions, 1106 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:25,703 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-03 19:02:25,704 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} [2024-06-03 19:02:25,704 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-03 19:02:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-03 19:02:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:25,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:02:25,705 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)] === [2024-06-03 19:02:25,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1808496734, now seen corresponding path program 8 times [2024-06-03 19:02:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512732400] [2024-06-03 19:02:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:25,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:25,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512732400] [2024-06-03 19:02:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512732400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:25,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902741059] [2024-06-03 19:02:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:25,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:25,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:25,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 80 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:25,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:25,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:25,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:26,123 INFO L124 PetriNetUnfolderBase]: 352/653 cut-off events. [2024-06-03 19:02:26,123 INFO L125 PetriNetUnfolderBase]: For 11260/11260 co-relation queries the response was YES. [2024-06-03 19:02:26,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 653 events. 352/653 cut-off events. For 11260/11260 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3156 event pairs, 41 based on Foata normal form. 3/655 useless extension candidates. Maximal degree in co-relation 3985. Up to 460 conditions per place. [2024-06-03 19:02:26,129 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 76 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-03 19:02:26,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1245 flow [2024-06-03 19:02:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-03 19:02:26,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35517241379310344 [2024-06-03 19:02:26,131 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 103 transitions. [2024-06-03 19:02:26,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1245 flow [2024-06-03 19:02:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 1191 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:26,153 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-03 19:02:26,154 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} [2024-06-03 19:02:26,154 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-03 19:02:26,154 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-03 19:02:26,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:26,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:26,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:26,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:02:26,155 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)] === [2024-06-03 19:02:26,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1808435199, now seen corresponding path program 7 times [2024-06-03 19:02:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:26,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007660032] [2024-06-03 19:02:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:26,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:26,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007660032] [2024-06-03 19:02:26,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007660032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:26,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:26,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:26,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621510205] [2024-06-03 19:02:26,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:26,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:26,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:26,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:26,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:26,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 81 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:26,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:26,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:26,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:26,541 INFO L124 PetriNetUnfolderBase]: 361/668 cut-off events. [2024-06-03 19:02:26,541 INFO L125 PetriNetUnfolderBase]: For 11942/11946 co-relation queries the response was YES. [2024-06-03 19:02:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4173 conditions, 668 events. 361/668 cut-off events. For 11942/11946 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3221 event pairs, 43 based on Foata normal form. 7/674 useless extension candidates. Maximal degree in co-relation 4102. Up to 487 conditions per place. [2024-06-03 19:02:26,547 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-03 19:02:26,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1183 flow [2024-06-03 19:02:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 19:02:26,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 19:02:26,548 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 101 transitions. [2024-06-03 19:02:26,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1183 flow [2024-06-03 19:02:26,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 1121 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 19:02:26,565 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-03 19:02:26,565 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} [2024-06-03 19:02:26,565 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-03 19:02:26,565 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-03 19:02:26,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:26,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:26,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:26,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:02:26,566 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)] === [2024-06-03 19:02:26,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -808946130, now seen corresponding path program 9 times [2024-06-03 19:02:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:26,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46003201] [2024-06-03 19:02:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:26,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:26,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46003201] [2024-06-03 19:02:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46003201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:26,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:26,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351582126] [2024-06-03 19:02:26,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:26,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:26,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:26,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:26,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:26,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:26,955 INFO L124 PetriNetUnfolderBase]: 370/685 cut-off events. [2024-06-03 19:02:26,955 INFO L125 PetriNetUnfolderBase]: For 13341/13341 co-relation queries the response was YES. [2024-06-03 19:02:26,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4345 conditions, 685 events. 370/685 cut-off events. For 13341/13341 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3346 event pairs, 43 based on Foata normal form. 3/687 useless extension candidates. Maximal degree in co-relation 4275. Up to 502 conditions per place. [2024-06-03 19:02:26,960 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-03 19:02:26,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1242 flow [2024-06-03 19:02:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 19:02:26,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 19:02:26,961 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 101 transitions. [2024-06-03 19:02:26,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1242 flow [2024-06-03 19:02:26,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 1174 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:26,977 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-03 19:02:26,977 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} [2024-06-03 19:02:26,977 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-03 19:02:26,977 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-03 19:02:26,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:26,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:26,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:26,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:02:26,978 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)] === [2024-06-03 19:02:26,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -580664455, now seen corresponding path program 8 times [2024-06-03 19:02:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175138347] [2024-06-03 19:02:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:26,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175138347] [2024-06-03 19:02:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175138347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:27,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:27,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823344318] [2024-06-03 19:02:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:27,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:27,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 83 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:27,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:27,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:27,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:27,339 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-03 19:02:27,339 INFO L125 PetriNetUnfolderBase]: For 14082/14086 co-relation queries the response was YES. [2024-06-03 19:02:27,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 721 events. 388/721 cut-off events. For 14082/14086 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3596 event pairs, 49 based on Foata normal form. 9/729 useless extension candidates. Maximal degree in co-relation 4430. Up to 525 conditions per place. [2024-06-03 19:02:27,344 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 1/105 dead transitions. [2024-06-03 19:02:27,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 105 transitions, 1261 flow [2024-06-03 19:02:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-03 19:02:27,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-03 19:02:27,349 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 105 transitions. [2024-06-03 19:02:27,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 105 transitions, 1261 flow [2024-06-03 19:02:27,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 105 transitions, 1199 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:27,368 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-03 19:02:27,368 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} [2024-06-03 19:02:27,392 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-03 19:02:27,393 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-03 19:02:27,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:27,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:27,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:27,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:02:27,393 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)] === [2024-06-03 19:02:27,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:27,394 INFO L85 PathProgramCache]: Analyzing trace with hash -580900675, now seen corresponding path program 9 times [2024-06-03 19:02:27,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:27,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68028121] [2024-06-03 19:02:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:27,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:27,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:27,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68028121] [2024-06-03 19:02:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68028121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130841500] [2024-06-03 19:02:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:27,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:27,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 85 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:27,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:27,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:27,767 INFO L124 PetriNetUnfolderBase]: 397/736 cut-off events. [2024-06-03 19:02:27,767 INFO L125 PetriNetUnfolderBase]: For 15301/15305 co-relation queries the response was YES. [2024-06-03 19:02:27,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 736 events. 397/736 cut-off events. For 15301/15305 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3700 event pairs, 47 based on Foata normal form. 3/738 useless extension candidates. Maximal degree in co-relation 4632. Up to 541 conditions per place. [2024-06-03 19:02:27,772 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 1/103 dead transitions. [2024-06-03 19:02:27,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 103 transitions, 1269 flow [2024-06-03 19:02:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-03 19:02:27,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-03 19:02:27,773 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 102 transitions. [2024-06-03 19:02:27,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 103 transitions, 1269 flow [2024-06-03 19:02:27,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 103 transitions, 1207 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:02:27,791 INFO L231 Difference]: Finished difference. Result has 129 places, 86 transitions, 989 flow [2024-06-03 19:02:27,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=989, PETRI_PLACES=129, PETRI_TRANSITIONS=86} [2024-06-03 19:02:27,792 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-06-03 19:02:27,792 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 86 transitions, 989 flow [2024-06-03 19:02:27,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:27,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:27,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:27,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:02:27,793 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)] === [2024-06-03 19:02:27,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash -580900830, now seen corresponding path program 10 times [2024-06-03 19:02:27,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:27,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004015654] [2024-06-03 19:02:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004015654] [2024-06-03 19:02:27,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004015654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:27,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:27,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125367234] [2024-06-03 19:02:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:27,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:28,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:28,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 86 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:28,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:28,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:28,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:28,180 INFO L124 PetriNetUnfolderBase]: 391/727 cut-off events. [2024-06-03 19:02:28,181 INFO L125 PetriNetUnfolderBase]: For 14715/14719 co-relation queries the response was YES. [2024-06-03 19:02:28,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 727 events. 391/727 cut-off events. For 14715/14719 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3677 event pairs, 45 based on Foata normal form. 3/729 useless extension candidates. Maximal degree in co-relation 4451. Up to 532 conditions per place. [2024-06-03 19:02:28,185 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 1/103 dead transitions. [2024-06-03 19:02:28,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 103 transitions, 1305 flow [2024-06-03 19:02:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-03 19:02:28,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-03 19:02:28,186 INFO L175 Difference]: Start difference. First operand has 129 places, 86 transitions, 989 flow. Second operand 10 states and 102 transitions. [2024-06-03 19:02:28,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 103 transitions, 1305 flow [2024-06-03 19:02:28,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 103 transitions, 1227 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:02:28,209 INFO L231 Difference]: Finished difference. Result has 131 places, 86 transitions, 967 flow [2024-06-03 19:02:28,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=967, PETRI_PLACES=131, PETRI_TRANSITIONS=86} [2024-06-03 19:02:28,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2024-06-03 19:02:28,210 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 86 transitions, 967 flow [2024-06-03 19:02:28,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:28,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:28,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:28,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:02:28,210 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)] === [2024-06-03 19:02:28,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash -572620885, now seen corresponding path program 10 times [2024-06-03 19:02:28,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:28,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566570601] [2024-06-03 19:02:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:28,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:28,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:28,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566570601] [2024-06-03 19:02:28,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566570601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:28,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:28,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:02:28,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525966108] [2024-06-03 19:02:28,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:28,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:02:28,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:02:28,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:02:28,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:28,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 86 transitions, 967 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:28,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:28,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:28,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:28,623 INFO L124 PetriNetUnfolderBase]: 391/731 cut-off events. [2024-06-03 19:02:28,623 INFO L125 PetriNetUnfolderBase]: For 14767/14771 co-relation queries the response was YES. [2024-06-03 19:02:28,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 731 events. 391/731 cut-off events. For 14767/14771 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3680 event pairs, 48 based on Foata normal form. 9/739 useless extension candidates. Maximal degree in co-relation 4442. Up to 546 conditions per place. [2024-06-03 19:02:28,628 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 79 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-03 19:02:28,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 105 transitions, 1281 flow [2024-06-03 19:02:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:02:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:02:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 19:02:28,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 19:02:28,629 INFO L175 Difference]: Start difference. First operand has 131 places, 86 transitions, 967 flow. Second operand 10 states and 101 transitions. [2024-06-03 19:02:28,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 105 transitions, 1281 flow [2024-06-03 19:02:28,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 105 transitions, 1185 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 19:02:28,651 INFO L231 Difference]: Finished difference. Result has 133 places, 87 transitions, 963 flow [2024-06-03 19:02:28,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=963, PETRI_PLACES=133, PETRI_TRANSITIONS=87} [2024-06-03 19:02:28,651 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-06-03 19:02:28,651 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 963 flow [2024-06-03 19:02:28,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:28,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:28,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:28,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:02:28,652 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)] === [2024-06-03 19:02:28,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1236290187, now seen corresponding path program 1 times [2024-06-03 19:02:28,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:28,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608660525] [2024-06-03 19:02:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:28,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:28,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608660525] [2024-06-03 19:02:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608660525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:28,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:28,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278912792] [2024-06-03 19:02:28,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:28,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:28,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:28,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:28,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 87 transitions, 963 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:28,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:28,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:28,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:29,130 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-03 19:02:29,131 INFO L125 PetriNetUnfolderBase]: For 18227/18231 co-relation queries the response was YES. [2024-06-03 19:02:29,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 784 events. 418/784 cut-off events. For 18227/18231 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4008 event pairs, 11 based on Foata normal form. 13/797 useless extension candidates. Maximal degree in co-relation 4761. Up to 442 conditions per place. [2024-06-03 19:02:29,135 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-03 19:02:29,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 122 transitions, 1527 flow [2024-06-03 19:02:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-03 19:02:29,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-03 19:02:29,137 INFO L175 Difference]: Start difference. First operand has 133 places, 87 transitions, 963 flow. Second operand 11 states and 123 transitions. [2024-06-03 19:02:29,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 122 transitions, 1527 flow [2024-06-03 19:02:29,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1410 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-03 19:02:29,159 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-03 19:02:29,159 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} [2024-06-03 19:02:29,159 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-03 19:02:29,159 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-03 19:02:29,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:29,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:29,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:02:29,160 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)] === [2024-06-03 19:02:29,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash -501376663, now seen corresponding path program 2 times [2024-06-03 19:02:29,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:29,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228907798] [2024-06-03 19:02:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:29,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228907798] [2024-06-03 19:02:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228907798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:29,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:29,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:29,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760124509] [2024-06-03 19:02:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:29,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:29,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:29,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 83 transitions, 860 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:29,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:29,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:29,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:29,612 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-03 19:02:29,613 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-03 19:02:29,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 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 3532 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. [2024-06-03 19:02:29,617 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-03 19:02:29,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1334 flow [2024-06-03 19:02:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-03 19:02:29,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-03 19:02:29,626 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 117 transitions. [2024-06-03 19:02:29,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1334 flow [2024-06-03 19:02:29,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1264 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-03 19:02:29,647 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-03 19:02:29,647 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} [2024-06-03 19:02:29,648 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-03 19:02:29,648 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-03 19:02:29,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:29,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:29,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:29,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:02:29,648 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)] === [2024-06-03 19:02:29,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -499473883, now seen corresponding path program 3 times [2024-06-03 19:02:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:29,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092914185] [2024-06-03 19:02:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092914185] [2024-06-03 19:02:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092914185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:29,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367058163] [2024-06-03 19:02:29,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:29,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:29,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:29,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:29,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 806 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:29,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:29,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:29,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:30,103 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-03 19:02:30,103 INFO L125 PetriNetUnfolderBase]: For 15364/15368 co-relation queries the response was YES. [2024-06-03 19:02:30,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3916 conditions, 669 events. 357/669 cut-off events. For 15364/15368 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3316 event pairs, 37 based on Foata normal form. 13/682 useless extension candidates. Maximal degree in co-relation 3846. Up to 423 conditions per place. [2024-06-03 19:02:30,107 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 66 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-03 19:02:30,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1206 flow [2024-06-03 19:02:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-03 19:02:30,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-03 19:02:30,109 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 114 transitions. [2024-06-03 19:02:30,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1206 flow [2024-06-03 19:02:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 1154 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 19:02:30,125 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-03 19:02:30,125 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} [2024-06-03 19:02:30,125 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-03 19:02:30,125 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-03 19:02:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:30,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:02:30,126 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)] === [2024-06-03 19:02:30,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -499469233, now seen corresponding path program 4 times [2024-06-03 19:02:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:30,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734136608] [2024-06-03 19:02:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:30,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:30,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734136608] [2024-06-03 19:02:30,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734136608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:30,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:30,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063824508] [2024-06-03 19:02:30,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:30,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:30,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 782 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:30,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:30,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:30,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:30,582 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-03 19:02:30,582 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-03 19:02:30,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3760 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 3216 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. [2024-06-03 19:02:30,586 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-03 19:02:30,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1134 flow [2024-06-03 19:02:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-03 19:02:30,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-03 19:02:30,587 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 113 transitions. [2024-06-03 19:02:30,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1134 flow [2024-06-03 19:02:30,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 1080 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:30,604 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-03 19:02:30,604 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} [2024-06-03 19:02:30,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-03 19:02:30,605 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-03 19:02:30,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:30,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:30,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:30,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:02:30,606 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)] === [2024-06-03 19:02:30,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 342631717, now seen corresponding path program 5 times [2024-06-03 19:02:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967707945] [2024-06-03 19:02:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:30,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:30,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967707945] [2024-06-03 19:02:30,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967707945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:30,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:30,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:30,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872976114] [2024-06-03 19:02:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:30,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:30,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:30,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:30,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 738 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:30,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:30,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:30,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:31,031 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-03 19:02:31,032 INFO L125 PetriNetUnfolderBase]: For 12979/12979 co-relation queries the response was YES. [2024-06-03 19:02:31,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 616 events. 329/616 cut-off events. For 12979/12979 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2980 event pairs, 33 based on Foata normal form. 9/625 useless extension candidates. Maximal degree in co-relation 3543. Up to 377 conditions per place. [2024-06-03 19:02:31,035 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-03 19:02:31,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1178 flow [2024-06-03 19:02:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-03 19:02:31,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-03 19:02:31,036 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 113 transitions. [2024-06-03 19:02:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1178 flow [2024-06-03 19:02:31,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 1091 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-03 19:02:31,051 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-03 19:02:31,051 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} [2024-06-03 19:02:31,051 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-03 19:02:31,051 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-03 19:02:31,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:31,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:31,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:31,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:02:31,052 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)] === [2024-06-03 19:02:31,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1218275177, now seen corresponding path program 6 times [2024-06-03 19:02:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:31,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459683981] [2024-06-03 19:02:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459683981] [2024-06-03 19:02:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459683981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:31,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:31,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069183373] [2024-06-03 19:02:31,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:31,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:31,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:31,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:31,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:31,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:31,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:31,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:31,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:31,482 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-03 19:02:31,483 INFO L125 PetriNetUnfolderBase]: For 11049/11053 co-relation queries the response was YES. [2024-06-03 19:02:31,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 580 events. 309/580 cut-off events. For 11049/11053 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2758 event pairs, 33 based on Foata normal form. 13/593 useless extension candidates. Maximal degree in co-relation 3161. Up to 357 conditions per place. [2024-06-03 19:02:31,486 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 58 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-03 19:02:31,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1029 flow [2024-06-03 19:02:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-03 19:02:31,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-03 19:02:31,487 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 110 transitions. [2024-06-03 19:02:31,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1029 flow [2024-06-03 19:02:31,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 987 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 19:02:31,500 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-03 19:02:31,500 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} [2024-06-03 19:02:31,500 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-03 19:02:31,501 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-03 19:02:31,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:31,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:31,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:31,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:02:31,501 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)] === [2024-06-03 19:02:31,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash 427061391, now seen corresponding path program 7 times [2024-06-03 19:02:31,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:31,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402499018] [2024-06-03 19:02:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:31,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:31,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:31,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402499018] [2024-06-03 19:02:31,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402499018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:31,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:31,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220769661] [2024-06-03 19:02:31,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:31,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:31,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:31,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:31,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 68 transitions, 649 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:31,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:31,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:31,933 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-03 19:02:31,934 INFO L125 PetriNetUnfolderBase]: For 10716/10720 co-relation queries the response was YES. [2024-06-03 19:02:31,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3080 conditions, 563 events. 298/563 cut-off events. For 10716/10720 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2677 event pairs, 15 based on Foata normal form. 13/576 useless extension candidates. Maximal degree in co-relation 3016. Up to 340 conditions per place. [2024-06-03 19:02:31,936 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 55 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-03 19:02:31,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 963 flow [2024-06-03 19:02:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-03 19:02:31,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-03 19:02:31,938 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 109 transitions. [2024-06-03 19:02:31,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 963 flow [2024-06-03 19:02:31,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 919 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:31,949 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-03 19:02:31,949 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} [2024-06-03 19:02:31,949 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-03 19:02:31,949 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-03 19:02:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:31,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:31,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:31,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:02:31,950 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)] === [2024-06-03 19:02:31,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 632792271, now seen corresponding path program 8 times [2024-06-03 19:02:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665025103] [2024-06-03 19:02:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:31,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665025103] [2024-06-03 19:02:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665025103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:32,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277982422] [2024-06-03 19:02:32,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:32,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:32,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:32,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:32,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:32,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 64 transitions, 611 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:32,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:32,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:32,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:32,345 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-03 19:02:32,345 INFO L125 PetriNetUnfolderBase]: For 9690/9690 co-relation queries the response was YES. [2024-06-03 19:02:32,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 538 events. 285/538 cut-off events. For 9690/9690 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2508 event pairs, 33 based on Foata normal form. 9/547 useless extension candidates. Maximal degree in co-relation 2909. Up to 319 conditions per place. [2024-06-03 19:02:32,348 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-03 19:02:32,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 941 flow [2024-06-03 19:02:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-03 19:02:32,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-03 19:02:32,357 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 112 transitions. [2024-06-03 19:02:32,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 941 flow [2024-06-03 19:02:32,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 90 transitions, 883 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 19:02:32,369 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-03 19:02:32,369 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} [2024-06-03 19:02:32,370 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-03 19:02:32,370 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-03 19:02:32,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:32,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:32,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:32,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:02:32,370 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)] === [2024-06-03 19:02:32,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash 625464801, now seen corresponding path program 9 times [2024-06-03 19:02:32,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:32,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523423786] [2024-06-03 19:02:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:32,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:32,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523423786] [2024-06-03 19:02:32,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523423786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:32,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:32,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474008639] [2024-06-03 19:02:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:32,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:32,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:32,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 61 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:32,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:32,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:32,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:32,747 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-03 19:02:32,747 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-03 19:02:32,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2716 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 2303 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. [2024-06-03 19:02:32,749 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-03 19:02:32,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 893 flow [2024-06-03 19:02:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-03 19:02:32,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-03 19:02:32,752 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 109 transitions. [2024-06-03 19:02:32,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 893 flow [2024-06-03 19:02:32,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 84 transitions, 845 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:32,780 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-03 19:02:32,781 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} [2024-06-03 19:02:32,781 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-03 19:02:32,781 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-03 19:02:32,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:32,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:32,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:02:32,782 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)] === [2024-06-03 19:02:32,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash 625469451, now seen corresponding path program 10 times [2024-06-03 19:02:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501125423] [2024-06-03 19:02:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:32,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:32,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501125423] [2024-06-03 19:02:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501125423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:32,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:32,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:32,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672847163] [2024-06-03 19:02:32,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:33,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:33,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 537 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:33,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:33,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:33,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:33,164 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-03 19:02:33,164 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-03 19:02:33,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2529 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 2188 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. [2024-06-03 19:02:33,167 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-03 19:02:33,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 825 flow [2024-06-03 19:02:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-03 19:02:33,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385579937304075 [2024-06-03 19:02:33,168 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 108 transitions. [2024-06-03 19:02:33,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 825 flow [2024-06-03 19:02:33,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 787 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:33,175 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-03 19:02:33,175 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} [2024-06-03 19:02:33,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-03 19:02:33,176 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-03 19:02:33,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:33,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:33,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:33,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:02:33,176 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)] === [2024-06-03 19:02:33,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash 61337465, now seen corresponding path program 11 times [2024-06-03 19:02:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:33,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142632723] [2024-06-03 19:02:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:33,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142632723] [2024-06-03 19:02:33,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142632723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:33,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:33,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:33,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989522618] [2024-06-03 19:02:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:33,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:33,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:33,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:33,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 53 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:33,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:33,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:33,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:33,559 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-03 19:02:33,559 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-03 19:02:33,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 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 1945 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. [2024-06-03 19:02:33,561 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-03 19:02:33,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 760 flow [2024-06-03 19:02:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-03 19:02:33,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335423197492163 [2024-06-03 19:02:33,577 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 107 transitions. [2024-06-03 19:02:33,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 760 flow [2024-06-03 19:02:33,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 694 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-03 19:02:33,584 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-03 19:02:33,584 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} [2024-06-03 19:02:33,586 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-03 19:02:33,586 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-03 19:02:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:33,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:33,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:02:33,593 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)] === [2024-06-03 19:02:33,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash 54009995, now seen corresponding path program 12 times [2024-06-03 19:02:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:33,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051629962] [2024-06-03 19:02:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:33,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051629962] [2024-06-03 19:02:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051629962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:33,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:33,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322432242] [2024-06-03 19:02:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:33,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:33,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 410 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:33,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:33,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:33,987 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-03 19:02:33,987 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-03 19:02:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2074 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 1749 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. [2024-06-03 19:02:33,989 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 42 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-03 19:02:33,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 686 flow [2024-06-03 19:02:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-03 19:02:33,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32601880877742945 [2024-06-03 19:02:33,990 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 104 transitions. [2024-06-03 19:02:33,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 686 flow [2024-06-03 19:02:33,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 646 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:33,995 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-03 19:02:33,995 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} [2024-06-03 19:02:33,996 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-03 19:02:33,996 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-03 19:02:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:33,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:33,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:33,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:02:33,996 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)] === [2024-06-03 19:02:33,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:33,997 INFO L85 PathProgramCache]: Analyzing trace with hash 54014645, now seen corresponding path program 13 times [2024-06-03 19:02:33,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:33,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224201442] [2024-06-03 19:02:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224201442] [2024-06-03 19:02:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224201442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:34,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:34,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047029082] [2024-06-03 19:02:34,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:34,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:34,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:34,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 48 transitions, 388 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:34,404 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-03 19:02:34,404 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-03 19:02:34,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 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 1652 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. [2024-06-03 19:02:34,405 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-03 19:02:34,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 630 flow [2024-06-03 19:02:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-03 19:02:34,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-03 19:02:34,407 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 103 transitions. [2024-06-03 19:02:34,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 630 flow [2024-06-03 19:02:34,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 600 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:34,411 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-03 19:02:34,411 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} [2024-06-03 19:02:34,411 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-03 19:02:34,412 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-03 19:02:34,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:34,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:34,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:34,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:02:34,412 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)] === [2024-06-03 19:02:34,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash -228823089, now seen corresponding path program 14 times [2024-06-03 19:02:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515897064] [2024-06-03 19:02:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:34,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:34,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515897064] [2024-06-03 19:02:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515897064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:34,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:34,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571671318] [2024-06-03 19:02:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:34,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:34,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:34,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:34,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 346 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:34,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:34,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:34,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:34,786 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-03 19:02:34,786 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-03 19:02:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1791 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 1482 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. [2024-06-03 19:02:34,787 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 36 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-03 19:02:34,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 648 flow [2024-06-03 19:02:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-03 19:02:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-03 19:02:34,788 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 106 transitions. [2024-06-03 19:02:34,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 648 flow [2024-06-03 19:02:34,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 590 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:34,792 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-03 19:02:34,792 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} [2024-06-03 19:02:34,792 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-03 19:02:34,792 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-03 19:02:34,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:34,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:34,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:34,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:02:34,793 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)] === [2024-06-03 19:02:34,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash -226920309, now seen corresponding path program 15 times [2024-06-03 19:02:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:34,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791152962] [2024-06-03 19:02:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:34,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:34,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791152962] [2024-06-03 19:02:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791152962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:34,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:34,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201303797] [2024-06-03 19:02:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:35,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:35,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 41 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:35,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:35,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:35,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:35,143 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-03 19:02:35,143 INFO L125 PetriNetUnfolderBase]: For 2766/2766 co-relation queries the response was YES. [2024-06-03 19:02:35,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 329 events. 172/329 cut-off events. For 2766/2766 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1303 event pairs, 28 based on Foata normal form. 9/338 useless extension candidates. Maximal degree in co-relation 1459. Up to 169 conditions per place. [2024-06-03 19:02:35,144 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 34 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-03 19:02:35,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 542 flow [2024-06-03 19:02:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-03 19:02:35,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-03 19:02:35,146 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 103 transitions. [2024-06-03 19:02:35,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 542 flow [2024-06-03 19:02:35,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 508 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:35,149 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-03 19:02:35,149 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} [2024-06-03 19:02:35,149 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-03 19:02:35,150 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-03 19:02:35,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:35,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:35,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:35,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:02:35,150 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)] === [2024-06-03 19:02:35,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -226915659, now seen corresponding path program 16 times [2024-06-03 19:02:35,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:35,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174995918] [2024-06-03 19:02:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:35,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174995918] [2024-06-03 19:02:35,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174995918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:35,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:35,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217164531] [2024-06-03 19:02:35,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:35,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:35,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:35,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:35,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:35,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:35,495 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-03 19:02:35,495 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-03 19:02:35,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 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 1192 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. [2024-06-03 19:02:35,497 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 30 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-03 19:02:35,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 496 flow [2024-06-03 19:02:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-03 19:02:35,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2024-06-03 19:02:35,509 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 102 transitions. [2024-06-03 19:02:35,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 496 flow [2024-06-03 19:02:35,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 468 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:35,512 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-03 19:02:35,512 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} [2024-06-03 19:02:35,512 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-03 19:02:35,512 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-03 19:02:35,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:35,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:35,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:35,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:02:35,513 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)] === [2024-06-03 19:02:35,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash -820728259, now seen corresponding path program 17 times [2024-06-03 19:02:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711115431] [2024-06-03 19:02:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711115431] [2024-06-03 19:02:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711115431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:35,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929918870] [2024-06-03 19:02:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:35,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:35,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:35,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:35,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:35,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:35,868 INFO L124 PetriNetUnfolderBase]: 147/278 cut-off events. [2024-06-03 19:02:35,868 INFO L125 PetriNetUnfolderBase]: For 2080/2088 co-relation queries the response was YES. [2024-06-03 19:02:35,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 278 events. 147/278 cut-off events. For 2080/2088 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1036 event pairs, 28 based on Foata normal form. 17/295 useless extension candidates. Maximal degree in co-relation 1199. Up to 131 conditions per place. [2024-06-03 19:02:35,870 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 28 selfloop transitions, 9 changer transitions 18/57 dead transitions. [2024-06-03 19:02:35,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 465 flow [2024-06-03 19:02:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-03 19:02:35,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-03 19:02:35,871 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 106 transitions. [2024-06-03 19:02:35,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 465 flow [2024-06-03 19:02:35,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 57 transitions, 414 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:35,873 INFO L231 Difference]: Finished difference. Result has 61 places, 31 transitions, 195 flow [2024-06-03 19:02:35,873 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=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=195, PETRI_PLACES=61, PETRI_TRANSITIONS=31} [2024-06-03 19:02:35,873 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-03 19:02:35,874 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 31 transitions, 195 flow [2024-06-03 19:02:35,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:35,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:35,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:35,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:02:35,874 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)] === [2024-06-03 19:02:35,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash -828051079, now seen corresponding path program 18 times [2024-06-03 19:02:35,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:35,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125673415] [2024-06-03 19:02:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:35,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:36,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125673415] [2024-06-03 19:02:36,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125673415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:36,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:36,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737741934] [2024-06-03 19:02:36,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:36,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:36,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:36,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 31 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:36,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:36,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:36,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:36,257 INFO L124 PetriNetUnfolderBase]: 127/246 cut-off events. [2024-06-03 19:02:36,258 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2024-06-03 19:02:36,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 246 events. 127/246 cut-off events. For 1313/1313 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 881 event pairs, 28 based on Foata normal form. 9/255 useless extension candidates. Maximal degree in co-relation 953. Up to 111 conditions per place. [2024-06-03 19:02:36,259 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 10 changer transitions 13/51 dead transitions. [2024-06-03 19:02:36,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 379 flow [2024-06-03 19:02:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-03 19:02:36,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-03 19:02:36,260 INFO L175 Difference]: Start difference. First operand has 61 places, 31 transitions, 195 flow. Second operand 11 states and 103 transitions. [2024-06-03 19:02:36,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 379 flow [2024-06-03 19:02:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 51 transitions, 346 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-03 19:02:36,262 INFO L231 Difference]: Finished difference. Result has 56 places, 29 transitions, 175 flow [2024-06-03 19:02:36,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=175, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2024-06-03 19:02:36,262 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 25 predicate places. [2024-06-03 19:02:36,262 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 175 flow [2024-06-03 19:02:36,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:36,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:36,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:36,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:02:36,263 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)] === [2024-06-03 19:02:36,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash -828055729, now seen corresponding path program 19 times [2024-06-03 19:02:36,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:36,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763652599] [2024-06-03 19:02:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:36,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:36,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:36,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763652599] [2024-06-03 19:02:36,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763652599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:36,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:36,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892221513] [2024-06-03 19:02:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:36,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:36,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 175 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:36,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:36,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:36,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:36,611 INFO L124 PetriNetUnfolderBase]: 116/229 cut-off events. [2024-06-03 19:02:36,612 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-03 19:02:36,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 229 events. 116/229 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 802 event pairs, 10 based on Foata normal form. 9/238 useless extension candidates. Maximal degree in co-relation 852. Up to 94 conditions per place. [2024-06-03 19:02:36,612 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 23 selfloop transitions, 7 changer transitions 17/49 dead transitions. [2024-06-03 19:02:36,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 361 flow [2024-06-03 19:02:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-03 19:02:36,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2024-06-03 19:02:36,613 INFO L175 Difference]: Start difference. First operand has 56 places, 29 transitions, 175 flow. Second operand 11 states and 102 transitions. [2024-06-03 19:02:36,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 361 flow [2024-06-03 19:02:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 331 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 19:02:36,614 INFO L231 Difference]: Finished difference. Result has 54 places, 25 transitions, 140 flow [2024-06-03 19:02:36,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=140, PETRI_PLACES=54, PETRI_TRANSITIONS=25} [2024-06-03 19:02:36,620 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-03 19:02:36,620 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 25 transitions, 140 flow [2024-06-03 19:02:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:36,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:02:36,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:02:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:02:36,621 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)] === [2024-06-03 19:02:36,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:02:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash -571377589, now seen corresponding path program 20 times [2024-06-03 19:02:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:02:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430473625] [2024-06-03 19:02:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:02:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:02:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:02:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:02:36,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:02:36,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430473625] [2024-06-03 19:02:36,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430473625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:02:36,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:02:36,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:02:36,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140638856] [2024-06-03 19:02:36,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:02:36,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:02:36,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:02:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:02:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:02:36,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 19:02:36,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 25 transitions, 140 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:36,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:02:36,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 19:02:36,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:02:36,910 INFO L124 PetriNetUnfolderBase]: 58/124 cut-off events. [2024-06-03 19:02:36,910 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2024-06-03 19:02:36,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 124 events. 58/124 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 313 event pairs, 0 based on Foata normal form. 9/133 useless extension candidates. Maximal degree in co-relation 410. Up to 51 conditions per place. [2024-06-03 19:02:36,911 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-03 19:02:36,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 39 transitions, 250 flow [2024-06-03 19:02:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:02:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:02:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-06-03 19:02:36,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29153605015673983 [2024-06-03 19:02:36,911 INFO L175 Difference]: Start difference. First operand has 54 places, 25 transitions, 140 flow. Second operand 11 states and 93 transitions. [2024-06-03 19:02:36,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 39 transitions, 250 flow [2024-06-03 19:02:36,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 222 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 19:02:36,912 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2024-06-03 19:02:36,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=45, PETRI_TRANSITIONS=0} [2024-06-03 19:02:36,912 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-06-03 19:02:36,912 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2024-06-03 19:02:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:02:36,914 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 19:02:36,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 19:02:36,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 19:02:36,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 19:02:36,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:02:36,916 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-03 19:02:36,918 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 19:02:36,918 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 19:02:36,921 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 19:02:36,921 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 19:02:36,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 07:02:36 BasicIcfg [2024-06-03 19:02:36,922 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 19:02:36,922 INFO L158 Benchmark]: Toolchain (without parser) took 21376.85ms. Allocated memory was 165.7MB in the beginning and 327.2MB in the end (delta: 161.5MB). Free memory was 129.4MB in the beginning and 170.1MB in the end (delta: -40.7MB). Peak memory consumption was 121.8MB. Max. memory is 16.1GB. [2024-06-03 19:02:36,922 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 85.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 19:02:36,923 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 96.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 19:02:36,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.67ms. Allocated memory is still 165.7MB. Free memory was 128.4MB in the beginning and 103.2MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-03 19:02:36,923 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.46ms. Allocated memory is still 165.7MB. Free memory was 103.2MB in the beginning and 101.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 19:02:36,926 INFO L158 Benchmark]: Boogie Preprocessor took 34.76ms. Allocated memory is still 165.7MB. Free memory was 101.1MB in the beginning and 99.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 19:02:36,926 INFO L158 Benchmark]: RCFGBuilder took 359.73ms. Allocated memory is still 165.7MB. Free memory was 99.0MB in the beginning and 72.8MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-03 19:02:36,926 INFO L158 Benchmark]: TraceAbstraction took 20586.34ms. Allocated memory was 165.7MB in the beginning and 327.2MB in the end (delta: 161.5MB). Free memory was 72.8MB in the beginning and 170.1MB in the end (delta: -97.2MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2024-06-03 19:02:36,927 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 0.17ms. Allocated memory is still 125.8MB. Free memory is still 85.2MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 96.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.67ms. Allocated memory is still 165.7MB. Free memory was 128.4MB in the beginning and 103.2MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.46ms. Allocated memory is still 165.7MB. Free memory was 103.2MB in the beginning and 101.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.76ms. Allocated memory is still 165.7MB. Free memory was 101.1MB in the beginning and 99.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 359.73ms. Allocated memory is still 165.7MB. Free memory was 99.0MB in the beginning and 72.8MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 20586.34ms. Allocated memory was 165.7MB in the beginning and 327.2MB in the end (delta: 161.5MB). Free memory was 72.8MB in the beginning and 170.1MB in the end (delta: -97.2MB). Peak memory consumption was 65.2MB. 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: 20.5s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3402 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2968 mSDsluCounter, 574 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 473 mSDsCounter, 463 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15731 IncrementalHoareTripleChecker+Invalid, 16194 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 463 mSolverCounterUnsat, 101 mSDtfsCounter, 15731 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, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=989occurred in iteration=29, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 902 NumberOfCodeBlocks, 902 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 851 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 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! [2024-06-03 19:02:36,953 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