./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-7.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/fib_safe-7.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_safe-7.i ./goblint.2024-05-21_14-57-05.files/protection/fib_safe-7.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 18:35:56,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:35:56,937 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:35:56,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:35:56,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:35:56,966 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:35:56,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:35:56,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:35:56,968 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:35:56,973 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:35:56,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:35:56,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:35:56,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:35:56,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:35:56,977 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:35:56,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:35:56,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:35:56,978 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:35:56,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:35:56,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:35:56,980 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:35:56,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:35:56,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:35:56,981 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:35:56,982 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:35:56,982 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:35:56,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:35:56,983 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:35:56,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:35:56,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:35:56,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:35:56,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:35:56,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:35:56,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:35:56,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:35:56,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:35:56,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:35:56,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:35:56,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:35:56,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:35:56,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:35:56,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:35:56,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:35:56,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:35:57,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:35:57,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:35:57,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:35:57,270 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:35:57,271 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:35:57,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-7.i [2024-06-03 18:35:58,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:35:58,765 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:35:58,771 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i [2024-06-03 18:35:58,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28377e90a/bdd0c6a74577434f945ac262b2a2ed49/FLAG4f3c6ae44 [2024-06-03 18:35:58,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28377e90a/bdd0c6a74577434f945ac262b2a2ed49 [2024-06-03 18:35:58,811 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:35:58,812 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:35:58,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/fib_safe-7.yml/witness.yml [2024-06-03 18:35:58,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:35:58,944 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:35:58,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:35:58,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:35:58,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:35:58,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:35:58" (1/2) ... [2024-06-03 18:35:58,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a42cc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:35:58, skipping insertion in model container [2024-06-03 18:35:58,952 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:35:58" (1/2) ... [2024-06-03 18:35:58,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6dad4163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:35:58, skipping insertion in model container [2024-06-03 18:35:58,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:35:58" (2/2) ... [2024-06-03 18:35:58,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a42cc64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:58, skipping insertion in model container [2024-06-03 18:35:58,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:35:58" (2/2) ... [2024-06-03 18:35:58,954 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:35:58,996 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:35:58,997 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 18:35:58,998 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 18:35:58,998 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:35:58,998 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-03 18:35:59,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:35:59,318 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:35:59,333 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:35:59,438 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:35:59,502 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:35:59,503 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59 WrapperNode [2024-06-03 18:35:59,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:35:59,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:35:59,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:35:59,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:35:59,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,584 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-03 18:35:59,584 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:35:59,585 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:35:59,585 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:35:59,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:35:59,595 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,628 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 18:35:59,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:35:59,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:35:59,661 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:35:59,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:35:59,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (1/1) ... [2024-06-03 18:35:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:35:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:35:59,694 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 18:35:59,729 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 18:35:59,775 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-03 18:35:59,775 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-03 18:35:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-03 18:35:59,776 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-03 18:35:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:35:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:35:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:35:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:35:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:35:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:35:59,779 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 18:35:59,920 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:35:59,922 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:36:00,115 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:36:00,116 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:36:00,224 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:36:00,224 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-03 18:36:00,225 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:36:00 BoogieIcfgContainer [2024-06-03 18:36:00,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:36:00,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:36:00,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:36:00,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:36:00,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:35:58" (1/4) ... [2024-06-03 18:36:00,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303719a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:36:00, skipping insertion in model container [2024-06-03 18:36:00,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:35:58" (2/4) ... [2024-06-03 18:36:00,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303719a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:36:00, skipping insertion in model container [2024-06-03 18:36:00,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:35:59" (3/4) ... [2024-06-03 18:36:00,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303719a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:36:00, skipping insertion in model container [2024-06-03 18:36:00,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:36:00" (4/4) ... [2024-06-03 18:36:00,238 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2024-06-03 18:36:00,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:36:00,254 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 18:36:00,254 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:36:00,292 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:36:00,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-03 18:36:00,356 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-03 18:36:00,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:36:00,359 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 18:36:00,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-03 18:36:00,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-03 18:36:00,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:36:00,376 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;@18932aa8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:36:00,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 18:36:00,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:36:00,381 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-03 18:36:00,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:36:00,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:00,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:00,383 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 18:36:00,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash 259354094, now seen corresponding path program 1 times [2024-06-03 18:36:00,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:00,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27550216] [2024-06-03 18:36:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:00,985 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 18:36:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:00,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27550216] [2024-06-03 18:36:00,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27550216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:00,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:36:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744931451] [2024-06-03 18:36:00,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:01,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:36:01,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:36:01,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:36:01,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:01,075 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 18:36:01,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:01,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:01,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:01,320 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-03 18:36:01,320 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-03 18:36:01,322 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 18:36:01,326 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 34 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-03 18:36:01,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 227 flow [2024-06-03 18:36:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:36:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:36:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-03 18:36:01,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-03 18:36:01,339 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 85 transitions. [2024-06-03 18:36:01,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 227 flow [2024-06-03 18:36:01,342 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 18:36:01,344 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-03 18:36:01,345 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 18:36:01,349 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-03 18:36:01,349 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-03 18:36:01,350 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 18:36:01,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:36:01,351 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 18:36:01,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -227696702, now seen corresponding path program 1 times [2024-06-03 18:36:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:01,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439995615] [2024-06-03 18:36:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:01,743 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 18:36:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439995615] [2024-06-03 18:36:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439995615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:01,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:01,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625249451] [2024-06-03 18:36:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:01,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:36:01,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:36:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:36:01,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:01,796 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 18:36:01,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:01,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:01,900 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-03 18:36:01,901 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-03 18:36:01,902 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 18:36:01,904 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 42 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-03 18:36:01,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 291 flow [2024-06-03 18:36:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:36:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:36:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-03 18:36:01,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-06-03 18:36:01,907 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 92 transitions. [2024-06-03 18:36:01,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 291 flow [2024-06-03 18:36:01,909 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 18:36:01,910 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-03 18:36:01,910 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 18:36:01,911 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-03 18:36:01,911 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-03 18:36:01,911 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 18:36:01,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:01,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:01,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:36:01,912 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 18:36:01,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:01,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1531337612, now seen corresponding path program 1 times [2024-06-03 18:36:01,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:01,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396617965] [2024-06-03 18:36:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:01,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:02,202 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 18:36:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:02,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396617965] [2024-06-03 18:36:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396617965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:02,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:36:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983483705] [2024-06-03 18:36:02,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:36:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:36:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:36:02,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:02,246 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 18:36:02,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:02,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:02,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:02,390 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-03 18:36:02,390 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-03 18:36:02,392 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 18:36:02,394 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-03 18:36:02,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 366 flow [2024-06-03 18:36:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:36:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:36:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-03 18:36:02,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267241379310345 [2024-06-03 18:36:02,401 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 99 transitions. [2024-06-03 18:36:02,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 366 flow [2024-06-03 18:36:02,406 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 18:36:02,408 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-03 18:36:02,408 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 18:36:02,409 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-03 18:36:02,409 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-03 18:36:02,410 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 18:36:02,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:02,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:02,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:36:02,410 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 18:36:02,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 58741636, now seen corresponding path program 1 times [2024-06-03 18:36:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:02,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690027745] [2024-06-03 18:36:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:02,702 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 18:36:02,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:02,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690027745] [2024-06-03 18:36:02,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690027745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:02,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:02,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:02,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301565357] [2024-06-03 18:36:02,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:02,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:36:02,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:36:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:36:02,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:02,733 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 18:36:02,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:02,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:02,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:02,825 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-03 18:36:02,826 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-03 18:36:02,827 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 18:36:02,828 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-03 18:36:02,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 348 flow [2024-06-03 18:36:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:36:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:36:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-03 18:36:02,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-03 18:36:02,830 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 78 transitions. [2024-06-03 18:36:02,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 348 flow [2024-06-03 18:36:02,832 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 18:36:02,833 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-03 18:36:02,834 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 18:36:02,834 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-03 18:36:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-03 18:36:02,835 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 18:36:02,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:02,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:02,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:36:02,836 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 18:36:02,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1820991533, now seen corresponding path program 1 times [2024-06-03 18:36:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333134086] [2024-06-03 18:36:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:03,102 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 18:36:03,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333134086] [2024-06-03 18:36:03,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333134086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:03,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:03,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:36:03,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825341899] [2024-06-03 18:36:03,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:03,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:36:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:36:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:36:03,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:03,154 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 18:36:03,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:03,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:03,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:03,268 INFO L124 PetriNetUnfolderBase]: 151/289 cut-off events. [2024-06-03 18:36:03,269 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-03 18:36:03,270 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 18:36:03,271 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 33 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-03 18:36:03,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 349 flow [2024-06-03 18:36:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:36:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:36:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-03 18:36:03,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-03 18:36:03,274 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 82 transitions. [2024-06-03 18:36:03,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 349 flow [2024-06-03 18:36:03,276 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 18:36:03,277 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-03 18:36:03,277 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 18:36:03,278 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-03 18:36:03,278 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-03 18:36:03,278 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 18:36:03,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:03,281 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 18:36:03,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:36:03,281 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 18:36:03,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash -124043924, now seen corresponding path program 1 times [2024-06-03 18:36:03,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:03,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714920542] [2024-06-03 18:36:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:03,546 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 18:36:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:03,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714920542] [2024-06-03 18:36:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714920542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:03,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:36:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641995723] [2024-06-03 18:36:03,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:03,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:36:03,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:36:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:36:03,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:03,605 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 18:36:03,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:03,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:03,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:03,710 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-03 18:36:03,711 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-03 18:36:03,713 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 18:36:03,714 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-03 18:36:03,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 421 flow [2024-06-03 18:36:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:36:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:36:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-03 18:36:03,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-06-03 18:36:03,716 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 98 transitions. [2024-06-03 18:36:03,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 421 flow [2024-06-03 18:36:03,719 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 18:36:03,721 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-03 18:36:03,721 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 18:36:03,723 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-03 18:36:03,724 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-03 18:36:03,724 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 18:36:03,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:03,724 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 18:36:03,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:36:03,725 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 18:36:03,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1747540272, now seen corresponding path program 2 times [2024-06-03 18:36:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:03,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395288538] [2024-06-03 18:36:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:04,014 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 18:36:04,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:04,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395288538] [2024-06-03 18:36:04,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395288538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:04,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:04,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:36:04,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978272608] [2024-06-03 18:36:04,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:04,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:36:04,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:36:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:36:04,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:04,050 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 18:36:04,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:04,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:04,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:04,169 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-03 18:36:04,169 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-06-03 18:36:04,170 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 18:36:04,172 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 39 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-03 18:36:04,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 484 flow [2024-06-03 18:36:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:36:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:36:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-03 18:36:04,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-06-03 18:36:04,174 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 92 transitions. [2024-06-03 18:36:04,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 484 flow [2024-06-03 18:36:04,176 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 18:36:04,177 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-03 18:36:04,177 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 18:36:04,178 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-03 18:36:04,178 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-03 18:36:04,179 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 18:36:04,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:04,179 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 18:36:04,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:36:04,179 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 18:36:04,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1553674328, now seen corresponding path program 3 times [2024-06-03 18:36:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:04,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015528825] [2024-06-03 18:36:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:04,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:04,457 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 18:36:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015528825] [2024-06-03 18:36:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015528825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:04,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:04,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:36:04,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99201754] [2024-06-03 18:36:04,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:04,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:36:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:36:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:36:04,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:04,495 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 18:36:04,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:04,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:04,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:04,628 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-03 18:36:04,629 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2024-06-03 18:36:04,630 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 18:36:04,632 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-03 18:36:04,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 564 flow [2024-06-03 18:36:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:36:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:36:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-03 18:36:04,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-03 18:36:04,633 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 94 transitions. [2024-06-03 18:36:04,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 564 flow [2024-06-03 18:36:04,637 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 18:36:04,638 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-03 18:36:04,638 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 18:36:04,639 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-03 18:36:04,639 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-03 18:36:04,639 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 18:36:04,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:04,640 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 18:36:04,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:36:04,640 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 18:36:04,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1748134918, now seen corresponding path program 4 times [2024-06-03 18:36:04,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:04,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804398397] [2024-06-03 18:36:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:04,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:04,882 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 18:36:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804398397] [2024-06-03 18:36:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804398397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:04,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:04,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:36:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291721314] [2024-06-03 18:36:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:36:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:36:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:36:04,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:04,928 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 18:36:04,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:04,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:04,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:05,040 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-03 18:36:05,041 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-03 18:36:05,042 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 18:36:05,044 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-03 18:36:05,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 649 flow [2024-06-03 18:36:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:36:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:36:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-03 18:36:05,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-03 18:36:05,046 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 95 transitions. [2024-06-03 18:36:05,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 649 flow [2024-06-03 18:36:05,050 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 18:36:05,052 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-03 18:36:05,052 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 18:36:05,053 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-03 18:36:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-03 18:36:05,053 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 18:36:05,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:05,054 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 18:36:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:36:05,054 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 18:36:05,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1742778672, now seen corresponding path program 5 times [2024-06-03 18:36:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101168128] [2024-06-03 18:36:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:05,345 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 18:36:05,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:05,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101168128] [2024-06-03 18:36:05,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101168128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:05,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:05,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:36:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993895150] [2024-06-03 18:36:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:05,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:36:05,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:36:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:36:05,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:05,396 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 18:36:05,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:05,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:05,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:05,498 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-03 18:36:05,498 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-03 18:36:05,499 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 18:36:05,501 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 48 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-03 18:36:05,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 689 flow [2024-06-03 18:36:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:36:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:36:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-03 18:36:05,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486590038314176 [2024-06-03 18:36:05,503 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 91 transitions. [2024-06-03 18:36:05,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 689 flow [2024-06-03 18:36:05,508 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 18:36:05,510 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-03 18:36:05,511 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 18:36:05,512 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-03 18:36:05,514 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-03 18:36:05,514 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 18:36:05,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:05,514 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 18:36:05,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:36:05,516 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 18:36:05,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1920923892, now seen corresponding path program 6 times [2024-06-03 18:36:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:05,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847554785] [2024-06-03 18:36:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:05,769 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 18:36:05,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:05,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847554785] [2024-06-03 18:36:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847554785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:05,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:05,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:36:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424370194] [2024-06-03 18:36:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:36:05,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:36:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:36:05,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:05,809 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 18:36:05,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:05,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:05,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:05,978 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-03 18:36:05,978 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-03 18:36:05,979 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 18:36:05,982 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 50 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-03 18:36:05,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 757 flow [2024-06-03 18:36:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:36:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:36:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-03 18:36:05,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-03 18:36:05,983 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 93 transitions. [2024-06-03 18:36:05,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 757 flow [2024-06-03 18:36:05,988 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 18:36:05,990 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-03 18:36:05,990 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 18:36:05,991 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-03 18:36:05,991 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-03 18:36:05,991 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 18:36:05,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:05,992 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 18:36:05,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:36:05,992 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 18:36:05,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:05,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1820825740, now seen corresponding path program 1 times [2024-06-03 18:36:05,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:05,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993740596] [2024-06-03 18:36:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:06,296 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 18:36:06,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:06,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993740596] [2024-06-03 18:36:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993740596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:06,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496256646] [2024-06-03 18:36:06,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:06,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:06,359 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 18:36:06,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:06,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:06,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:06,534 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-03 18:36:06,534 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-03 18:36:06,536 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 18:36:06,538 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-03 18:36:06,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 954 flow [2024-06-03 18:36:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-03 18:36:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-03 18:36:06,539 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 112 transitions. [2024-06-03 18:36:06,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 954 flow [2024-06-03 18:36:06,547 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 18:36:06,548 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-03 18:36:06,548 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 18:36:06,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-03 18:36:06,549 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-03 18:36:06,549 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 18:36:06,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:06,550 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 18:36:06,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:36:06,550 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 18:36:06,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash -986004792, now seen corresponding path program 2 times [2024-06-03 18:36:06,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:06,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719970163] [2024-06-03 18:36:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:06,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:06,846 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 18:36:06,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:06,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719970163] [2024-06-03 18:36:06,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719970163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:06,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:06,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:06,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021904980] [2024-06-03 18:36:06,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:06,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:06,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:06,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:06,890 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 18:36:06,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:06,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:06,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:07,042 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-03 18:36:07,042 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-03 18:36:07,044 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 18:36:07,047 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-03 18:36:07,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 923 flow [2024-06-03 18:36:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-03 18:36:07,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-03 18:36:07,050 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 110 transitions. [2024-06-03 18:36:07,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 923 flow [2024-06-03 18:36:07,059 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 18:36:07,061 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-03 18:36:07,061 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 18:36:07,062 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-03 18:36:07,062 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-03 18:36:07,062 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 18:36:07,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:07,063 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 18:36:07,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:36:07,063 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 18:36:07,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash -985943412, now seen corresponding path program 3 times [2024-06-03 18:36:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:07,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380688014] [2024-06-03 18:36:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:07,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:07,344 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 18:36:07,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:07,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380688014] [2024-06-03 18:36:07,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380688014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:07,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:07,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:07,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176627702] [2024-06-03 18:36:07,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:07,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:07,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:07,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:07,409 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 18:36:07,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:07,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:07,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:07,577 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-03 18:36:07,577 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-03 18:36:07,579 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 18:36:07,582 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-03 18:36:07,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 899 flow [2024-06-03 18:36:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-03 18:36:07,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-03 18:36:07,583 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 108 transitions. [2024-06-03 18:36:07,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 899 flow [2024-06-03 18:36:07,591 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 18:36:07,593 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-03 18:36:07,593 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 18:36:07,594 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-03 18:36:07,594 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-03 18:36:07,595 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 18:36:07,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:07,595 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 18:36:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:36:07,595 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 18:36:07,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -985943257, now seen corresponding path program 1 times [2024-06-03 18:36:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:07,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924964834] [2024-06-03 18:36:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:07,890 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 18:36:07,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:07,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924964834] [2024-06-03 18:36:07,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924964834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:07,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745074165] [2024-06-03 18:36:07,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:07,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:07,947 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 18:36:07,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:07,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:07,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:08,131 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-03 18:36:08,131 INFO L125 PetriNetUnfolderBase]: For 3834/3838 co-relation queries the response was YES. [2024-06-03 18:36:08,132 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 18:36:08,135 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 62 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-03 18:36:08,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 911 flow [2024-06-03 18:36:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-03 18:36:08,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-03 18:36:08,137 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 108 transitions. [2024-06-03 18:36:08,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 911 flow [2024-06-03 18:36:08,144 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 18:36:08,146 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-03 18:36:08,146 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 18:36:08,147 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-03 18:36:08,147 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-03 18:36:08,147 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 18:36:08,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:08,147 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 18:36:08,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:36:08,148 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 18:36:08,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:08,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1648791833, now seen corresponding path program 2 times [2024-06-03 18:36:08,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:08,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343597150] [2024-06-03 18:36:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:08,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:08,421 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 18:36:08,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:08,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343597150] [2024-06-03 18:36:08,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343597150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:08,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:08,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128417269] [2024-06-03 18:36:08,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:08,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:08,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:08,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:08,475 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 18:36:08,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:08,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:08,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:08,644 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-03 18:36:08,644 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-03 18:36:08,667 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 18:36:08,670 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-03 18:36:08,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 921 flow [2024-06-03 18:36:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 18:36:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 18:36:08,672 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 104 transitions. [2024-06-03 18:36:08,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 921 flow [2024-06-03 18:36:08,682 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 18:36:08,684 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-03 18:36:08,684 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 18:36:08,685 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-03 18:36:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-03 18:36:08,685 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 18:36:08,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:08,686 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 18:36:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:36:08,686 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 18:36:08,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1648795708, now seen corresponding path program 4 times [2024-06-03 18:36:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693499442] [2024-06-03 18:36:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:08,941 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 18:36:08,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:08,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693499442] [2024-06-03 18:36:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693499442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:08,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:08,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003130900] [2024-06-03 18:36:08,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:08,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:08,990 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 18:36:08,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:08,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:08,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:09,147 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-03 18:36:09,148 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-03 18:36:09,150 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 18:36:09,153 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-03 18:36:09,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1009 flow [2024-06-03 18:36:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-03 18:36:09,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-03 18:36:09,155 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 106 transitions. [2024-06-03 18:36:09,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1009 flow [2024-06-03 18:36:09,166 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 18:36:09,167 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-03 18:36:09,168 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 18:36:09,168 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-03 18:36:09,168 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-03 18:36:09,169 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 18:36:09,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:09,169 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 18:36:09,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:36:09,169 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 18:36:09,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1790001328, now seen corresponding path program 5 times [2024-06-03 18:36:09,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:09,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811525269] [2024-06-03 18:36:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:09,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:09,430 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 18:36:09,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811525269] [2024-06-03 18:36:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811525269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:09,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:09,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:09,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861931181] [2024-06-03 18:36:09,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:09,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:09,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:09,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:09,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:09,479 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 18:36:09,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:09,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:09,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:09,684 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-03 18:36:09,684 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-03 18:36:09,686 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 18:36:09,690 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-03 18:36:09,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 988 flow [2024-06-03 18:36:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 18:36:09,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 18:36:09,691 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 104 transitions. [2024-06-03 18:36:09,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 988 flow [2024-06-03 18:36:09,702 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 18:36:09,703 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-03 18:36:09,704 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 18:36:09,704 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-03 18:36:09,704 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-03 18:36:09,705 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 18:36:09,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:09,705 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 18:36:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:36:09,705 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 18:36:09,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1642155353, now seen corresponding path program 3 times [2024-06-03 18:36:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6501543] [2024-06-03 18:36:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:09,980 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 18:36:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:09,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6501543] [2024-06-03 18:36:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6501543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:09,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467485850] [2024-06-03 18:36:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:09,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:10,075 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 18:36:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:10,266 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-03 18:36:10,266 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-03 18:36:10,268 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 18:36:10,272 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-03 18:36:10,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1029 flow [2024-06-03 18:36:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-03 18:36:10,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689655172413793 [2024-06-03 18:36:10,273 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 107 transitions. [2024-06-03 18:36:10,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1029 flow [2024-06-03 18:36:10,287 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 18:36:10,289 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-03 18:36:10,289 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 18:36:10,289 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-03 18:36:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-03 18:36:10,290 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 18:36:10,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:10,290 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 18:36:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:36:10,290 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 18:36:10,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1642391728, now seen corresponding path program 6 times [2024-06-03 18:36:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:10,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345855376] [2024-06-03 18:36:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:10,563 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 18:36:10,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345855376] [2024-06-03 18:36:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345855376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:10,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:10,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519760442] [2024-06-03 18:36:10,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:10,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:10,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:10,612 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 18:36:10,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:10,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:10,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:10,800 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-03 18:36:10,800 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-03 18:36:10,802 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 18:36:10,806 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-03 18:36:10,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1058 flow [2024-06-03 18:36:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 18:36:10,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 18:36:10,808 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 104 transitions. [2024-06-03 18:36:10,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1058 flow [2024-06-03 18:36:10,824 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 18:36:10,826 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-03 18:36:10,826 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 18:36:10,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-03 18:36:10,827 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-03 18:36:10,827 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 18:36:10,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:10,827 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 18:36:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:36:10,827 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 18:36:10,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1642391573, now seen corresponding path program 4 times [2024-06-03 18:36:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:10,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265423626] [2024-06-03 18:36:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:11,088 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 18:36:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265423626] [2024-06-03 18:36:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265423626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332610172] [2024-06-03 18:36:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:11,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:11,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:11,157 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 18:36:11,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:11,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:11,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:11,326 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-03 18:36:11,326 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-03 18:36:11,329 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 18:36:11,333 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-03 18:36:11,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1063 flow [2024-06-03 18:36:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 18:36:11,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 18:36:11,334 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 104 transitions. [2024-06-03 18:36:11,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1063 flow [2024-06-03 18:36:11,349 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 18:36:11,351 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-03 18:36:11,351 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 18:36:11,351 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-03 18:36:11,351 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-03 18:36:11,352 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 18:36:11,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:11,352 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 18:36:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:36:11,352 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 18:36:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -802309495, now seen corresponding path program 5 times [2024-06-03 18:36:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71136122] [2024-06-03 18:36:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:11,614 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 18:36:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:11,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71136122] [2024-06-03 18:36:11,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71136122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:11,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755355825] [2024-06-03 18:36:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:11,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:11,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:11,668 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 18:36:11,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:11,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:11,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:11,848 INFO L124 PetriNetUnfolderBase]: 325/604 cut-off events. [2024-06-03 18:36:11,849 INFO L125 PetriNetUnfolderBase]: For 8521/8525 co-relation queries the response was YES. [2024-06-03 18:36:11,851 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 18:36:11,855 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-03 18:36:11,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1109 flow [2024-06-03 18:36:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-03 18:36:11,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586206896551724 [2024-06-03 18:36:11,856 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 104 transitions. [2024-06-03 18:36:11,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1109 flow [2024-06-03 18:36:11,871 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 18:36:11,873 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-03 18:36:11,873 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 18:36:11,873 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-03 18:36:11,874 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-03 18:36:11,874 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 18:36:11,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:11,874 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 18:36:11,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:36:11,874 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 18:36:11,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1660825599, now seen corresponding path program 6 times [2024-06-03 18:36:11,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:11,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423746721] [2024-06-03 18:36:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:11,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:12,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:12,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423746721] [2024-06-03 18:36:12,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423746721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:12,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:12,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:12,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066733084] [2024-06-03 18:36:12,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:12,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:12,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:12,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:12,218 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 18:36:12,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:12,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:12,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:12,389 INFO L124 PetriNetUnfolderBase]: 334/621 cut-off events. [2024-06-03 18:36:12,390 INFO L125 PetriNetUnfolderBase]: For 9475/9479 co-relation queries the response was YES. [2024-06-03 18:36:12,392 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 18:36:12,395 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-03 18:36:12,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1105 flow [2024-06-03 18:36:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 18:36:12,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 18:36:12,397 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 101 transitions. [2024-06-03 18:36:12,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1105 flow [2024-06-03 18:36:12,416 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 18:36:12,418 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-03 18:36:12,418 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 18:36:12,419 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-03 18:36:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-03 18:36:12,419 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 18:36:12,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:12,420 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 18:36:12,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:36:12,422 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 18:36:12,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1660825754, now seen corresponding path program 7 times [2024-06-03 18:36:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3653348] [2024-06-03 18:36:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:12,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:12,702 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 18:36:12,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3653348] [2024-06-03 18:36:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3653348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:12,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:12,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:12,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218661795] [2024-06-03 18:36:12,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:12,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:12,784 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 18:36:12,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:12,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:12,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:12,944 INFO L124 PetriNetUnfolderBase]: 343/636 cut-off events. [2024-06-03 18:36:12,944 INFO L125 PetriNetUnfolderBase]: For 10506/10510 co-relation queries the response was YES. [2024-06-03 18:36:12,947 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 18:36:12,957 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-03 18:36:12,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1170 flow [2024-06-03 18:36:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 18:36:12,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 18:36:12,958 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 101 transitions. [2024-06-03 18:36:12,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1170 flow [2024-06-03 18:36:12,978 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 18:36:12,980 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-03 18:36:12,980 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 18:36:12,981 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-03 18:36:12,981 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-03 18:36:12,981 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 18:36:12,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:12,982 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 18:36:12,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:36:12,982 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 18:36:12,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1808496734, now seen corresponding path program 8 times [2024-06-03 18:36:12,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:12,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482394509] [2024-06-03 18:36:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:13,258 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 18:36:13,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482394509] [2024-06-03 18:36:13,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482394509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:13,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:13,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310518627] [2024-06-03 18:36:13,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:13,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:13,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:13,339 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 18:36:13,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:13,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:13,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:13,546 INFO L124 PetriNetUnfolderBase]: 352/653 cut-off events. [2024-06-03 18:36:13,546 INFO L125 PetriNetUnfolderBase]: For 11260/11260 co-relation queries the response was YES. [2024-06-03 18:36:13,549 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 18:36:13,553 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 76 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-03 18:36:13,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1245 flow [2024-06-03 18:36:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-03 18:36:13,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35517241379310344 [2024-06-03 18:36:13,554 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 103 transitions. [2024-06-03 18:36:13,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1245 flow [2024-06-03 18:36:13,579 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 18:36:13,581 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-03 18:36:13,581 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 18:36:13,581 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-03 18:36:13,582 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-03 18:36:13,582 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 18:36:13,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:13,582 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 18:36:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:36:13,583 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 18:36:13,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1808435199, now seen corresponding path program 7 times [2024-06-03 18:36:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:13,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559458727] [2024-06-03 18:36:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:13,830 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 18:36:13,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:13,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559458727] [2024-06-03 18:36:13,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559458727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:13,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:13,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:13,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941058020] [2024-06-03 18:36:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:13,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:13,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:13,879 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 18:36:13,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:13,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:13,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:14,049 INFO L124 PetriNetUnfolderBase]: 361/668 cut-off events. [2024-06-03 18:36:14,049 INFO L125 PetriNetUnfolderBase]: For 11942/11946 co-relation queries the response was YES. [2024-06-03 18:36:14,053 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 18:36:14,056 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-03 18:36:14,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1183 flow [2024-06-03 18:36:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 18:36:14,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 18:36:14,058 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 101 transitions. [2024-06-03 18:36:14,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1183 flow [2024-06-03 18:36:14,081 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 18:36:14,083 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-03 18:36:14,083 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 18:36:14,084 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-03 18:36:14,084 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-03 18:36:14,084 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 18:36:14,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:14,084 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 18:36:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:36:14,085 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 18:36:14,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash -808946130, now seen corresponding path program 9 times [2024-06-03 18:36:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:14,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51323733] [2024-06-03 18:36:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:14,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:14,325 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 18:36:14,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51323733] [2024-06-03 18:36:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51323733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283873241] [2024-06-03 18:36:14,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:14,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:14,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:14,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:14,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:14,366 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 18:36:14,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:14,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:14,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:14,539 INFO L124 PetriNetUnfolderBase]: 370/685 cut-off events. [2024-06-03 18:36:14,540 INFO L125 PetriNetUnfolderBase]: For 13341/13341 co-relation queries the response was YES. [2024-06-03 18:36:14,543 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 18:36:14,547 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-03 18:36:14,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1242 flow [2024-06-03 18:36:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 18:36:14,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 18:36:14,549 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 101 transitions. [2024-06-03 18:36:14,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1242 flow [2024-06-03 18:36:14,572 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 18:36:14,575 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-03 18:36:14,575 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 18:36:14,576 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-03 18:36:14,576 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-03 18:36:14,576 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 18:36:14,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:14,576 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 18:36:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:36:14,577 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 18:36:14,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -580664455, now seen corresponding path program 8 times [2024-06-03 18:36:14,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:14,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861604232] [2024-06-03 18:36:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:14,845 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 18:36:14,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:14,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861604232] [2024-06-03 18:36:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861604232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:14,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:14,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74024168] [2024-06-03 18:36:14,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:14,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:14,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:14,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:14,899 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 18:36:14,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:14,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:14,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:15,068 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-03 18:36:15,069 INFO L125 PetriNetUnfolderBase]: For 14082/14086 co-relation queries the response was YES. [2024-06-03 18:36:15,072 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 18:36:15,075 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 1/105 dead transitions. [2024-06-03 18:36:15,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 105 transitions, 1261 flow [2024-06-03 18:36:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-03 18:36:15,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-03 18:36:15,077 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 105 transitions. [2024-06-03 18:36:15,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 105 transitions, 1261 flow [2024-06-03 18:36:15,106 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 18:36:15,108 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-03 18:36:15,108 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 18:36:15,112 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-03 18:36:15,112 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-03 18:36:15,113 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 18:36:15,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:15,113 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 18:36:15,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:36:15,113 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 18:36:15,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash -580900675, now seen corresponding path program 9 times [2024-06-03 18:36:15,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:15,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877188562] [2024-06-03 18:36:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:15,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:15,342 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 18:36:15,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:15,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877188562] [2024-06-03 18:36:15,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877188562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:15,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:15,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:15,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507146734] [2024-06-03 18:36:15,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:15,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:15,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:15,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:15,388 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 18:36:15,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:15,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:15,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:15,550 INFO L124 PetriNetUnfolderBase]: 397/736 cut-off events. [2024-06-03 18:36:15,550 INFO L125 PetriNetUnfolderBase]: For 15301/15305 co-relation queries the response was YES. [2024-06-03 18:36:15,553 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 18:36:15,557 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 1/103 dead transitions. [2024-06-03 18:36:15,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 103 transitions, 1269 flow [2024-06-03 18:36:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-03 18:36:15,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-03 18:36:15,558 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 102 transitions. [2024-06-03 18:36:15,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 103 transitions, 1269 flow [2024-06-03 18:36:15,585 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 18:36:15,587 INFO L231 Difference]: Finished difference. Result has 129 places, 86 transitions, 989 flow [2024-06-03 18:36:15,587 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 18:36:15,589 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-06-03 18:36:15,589 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 86 transitions, 989 flow [2024-06-03 18:36:15,589 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 18:36:15,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:15,590 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 18:36:15,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:36:15,590 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 18:36:15,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash -580900830, now seen corresponding path program 10 times [2024-06-03 18:36:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:15,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316271821] [2024-06-03 18:36:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:15,832 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 18:36:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316271821] [2024-06-03 18:36:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316271821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:15,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:15,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701704846] [2024-06-03 18:36:15,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:15,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:15,870 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 18:36:15,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:15,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:15,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,053 INFO L124 PetriNetUnfolderBase]: 391/727 cut-off events. [2024-06-03 18:36:16,055 INFO L125 PetriNetUnfolderBase]: For 14715/14719 co-relation queries the response was YES. [2024-06-03 18:36:16,058 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 18:36:16,062 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 1/103 dead transitions. [2024-06-03 18:36:16,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 103 transitions, 1305 flow [2024-06-03 18:36:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-03 18:36:16,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-03 18:36:16,066 INFO L175 Difference]: Start difference. First operand has 129 places, 86 transitions, 989 flow. Second operand 10 states and 102 transitions. [2024-06-03 18:36:16,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 103 transitions, 1305 flow [2024-06-03 18:36:16,100 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 18:36:16,101 INFO L231 Difference]: Finished difference. Result has 131 places, 86 transitions, 967 flow [2024-06-03 18:36:16,102 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 18:36:16,103 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2024-06-03 18:36:16,103 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 86 transitions, 967 flow [2024-06-03 18:36:16,103 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 18:36:16,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,103 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 18:36:16,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:36:16,104 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 18:36:16,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash -572620885, now seen corresponding path program 10 times [2024-06-03 18:36:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340153897] [2024-06-03 18:36:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,350 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 18:36:16,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340153897] [2024-06-03 18:36:16,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340153897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:36:16,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349078230] [2024-06-03 18:36:16,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:36:16,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:36:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:36:16,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:16,416 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 18:36:16,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:16,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:16,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,596 INFO L124 PetriNetUnfolderBase]: 391/731 cut-off events. [2024-06-03 18:36:16,597 INFO L125 PetriNetUnfolderBase]: For 14767/14771 co-relation queries the response was YES. [2024-06-03 18:36:16,600 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 18:36:16,603 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 79 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-03 18:36:16,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 105 transitions, 1281 flow [2024-06-03 18:36:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-03 18:36:16,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2024-06-03 18:36:16,605 INFO L175 Difference]: Start difference. First operand has 131 places, 86 transitions, 967 flow. Second operand 10 states and 101 transitions. [2024-06-03 18:36:16,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 105 transitions, 1281 flow [2024-06-03 18:36:16,636 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 18:36:16,639 INFO L231 Difference]: Finished difference. Result has 133 places, 87 transitions, 963 flow [2024-06-03 18:36:16,639 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 18:36:16,640 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-06-03 18:36:16,640 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 963 flow [2024-06-03 18:36:16,640 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 18:36:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,640 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 18:36:16,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:36:16,641 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 18:36:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1236290187, now seen corresponding path program 1 times [2024-06-03 18:36:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208249282] [2024-06-03 18:36:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,944 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 18:36:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208249282] [2024-06-03 18:36:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208249282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380190300] [2024-06-03 18:36:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:17,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:17,032 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 18:36:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:17,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:17,310 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-03 18:36:17,310 INFO L125 PetriNetUnfolderBase]: For 18227/18231 co-relation queries the response was YES. [2024-06-03 18:36:17,314 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 18:36:17,317 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-03 18:36:17,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 122 transitions, 1527 flow [2024-06-03 18:36:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-03 18:36:17,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-03 18:36:17,319 INFO L175 Difference]: Start difference. First operand has 133 places, 87 transitions, 963 flow. Second operand 11 states and 123 transitions. [2024-06-03 18:36:17,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 122 transitions, 1527 flow [2024-06-03 18:36:17,357 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 18:36:17,359 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-03 18:36:17,360 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 18:36:17,361 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-03 18:36:17,361 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-03 18:36:17,361 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 18:36:17,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:17,362 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 18:36:17,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:36:17,362 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 18:36:17,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:17,362 INFO L85 PathProgramCache]: Analyzing trace with hash -501376663, now seen corresponding path program 2 times [2024-06-03 18:36:17,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:17,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586456255] [2024-06-03 18:36:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:17,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:17,662 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 18:36:17,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586456255] [2024-06-03 18:36:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586456255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:17,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:17,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:17,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847557669] [2024-06-03 18:36:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:17,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:17,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:17,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:17,747 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 18:36:17,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:17,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:17,966 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-03 18:36:17,966 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-03 18:36:17,970 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 18:36:17,973 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-03 18:36:17,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1334 flow [2024-06-03 18:36:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-03 18:36:17,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-03 18:36:17,974 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 117 transitions. [2024-06-03 18:36:17,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1334 flow [2024-06-03 18:36:18,007 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 18:36:18,009 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-03 18:36:18,010 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 18:36:18,010 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-03 18:36:18,010 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-03 18:36:18,010 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 18:36:18,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:18,011 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 18:36:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:36:18,011 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 18:36:18,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash -499473883, now seen corresponding path program 3 times [2024-06-03 18:36:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836179110] [2024-06-03 18:36:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:18,304 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 18:36:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836179110] [2024-06-03 18:36:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836179110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:18,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571871990] [2024-06-03 18:36:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:18,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:18,369 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 18:36:18,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:18,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:18,595 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-03 18:36:18,596 INFO L125 PetriNetUnfolderBase]: For 15364/15368 co-relation queries the response was YES. [2024-06-03 18:36:18,598 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 18:36:18,601 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 66 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-03 18:36:18,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1206 flow [2024-06-03 18:36:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-03 18:36:18,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-03 18:36:18,604 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 114 transitions. [2024-06-03 18:36:18,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1206 flow [2024-06-03 18:36:18,623 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 18:36:18,625 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-03 18:36:18,625 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 18:36:18,626 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-03 18:36:18,626 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-03 18:36:18,626 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 18:36:18,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:18,626 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 18:36:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:36:18,627 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 18:36:18,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -499469233, now seen corresponding path program 4 times [2024-06-03 18:36:18,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:18,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068488862] [2024-06-03 18:36:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:18,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:18,955 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 18:36:18,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:18,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068488862] [2024-06-03 18:36:18,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068488862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:18,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:18,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666260001] [2024-06-03 18:36:18,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:18,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:19,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:19,030 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 18:36:19,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:19,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:19,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:19,243 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-03 18:36:19,243 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-03 18:36:19,245 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 18:36:19,248 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-03 18:36:19,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1134 flow [2024-06-03 18:36:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-03 18:36:19,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-03 18:36:19,249 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 113 transitions. [2024-06-03 18:36:19,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1134 flow [2024-06-03 18:36:19,273 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 18:36:19,275 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-03 18:36:19,275 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 18:36:19,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-03 18:36:19,276 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-03 18:36:19,276 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 18:36:19,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:19,276 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 18:36:19,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:36:19,276 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 18:36:19,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 342631717, now seen corresponding path program 5 times [2024-06-03 18:36:19,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:19,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346702361] [2024-06-03 18:36:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:19,533 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 18:36:19,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:19,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346702361] [2024-06-03 18:36:19,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346702361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:19,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:19,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924660509] [2024-06-03 18:36:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:19,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:19,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:19,584 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 18:36:19,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:19,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:19,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:19,758 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-03 18:36:19,758 INFO L125 PetriNetUnfolderBase]: For 12979/12979 co-relation queries the response was YES. [2024-06-03 18:36:19,761 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 18:36:19,763 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-03 18:36:19,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1178 flow [2024-06-03 18:36:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-03 18:36:19,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-03 18:36:19,765 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 113 transitions. [2024-06-03 18:36:19,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1178 flow [2024-06-03 18:36:19,787 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 18:36:19,789 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-03 18:36:19,789 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 18:36:19,790 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-03 18:36:19,790 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-03 18:36:19,790 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 18:36:19,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:19,791 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 18:36:19,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:36:19,791 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 18:36:19,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1218275177, now seen corresponding path program 6 times [2024-06-03 18:36:19,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:19,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096454585] [2024-06-03 18:36:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:20,043 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 18:36:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096454585] [2024-06-03 18:36:20,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096454585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:20,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:20,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491328516] [2024-06-03 18:36:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:20,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:20,118 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 18:36:20,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:20,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:20,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:20,308 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-03 18:36:20,309 INFO L125 PetriNetUnfolderBase]: For 11049/11053 co-relation queries the response was YES. [2024-06-03 18:36:20,311 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 18:36:20,313 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 58 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-03 18:36:20,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1029 flow [2024-06-03 18:36:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-03 18:36:20,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-03 18:36:20,315 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 110 transitions. [2024-06-03 18:36:20,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1029 flow [2024-06-03 18:36:20,335 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 18:36:20,337 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-03 18:36:20,337 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 18:36:20,338 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-03 18:36:20,338 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-03 18:36:20,338 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 18:36:20,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:20,339 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 18:36:20,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:36:20,339 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 18:36:20,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 427061391, now seen corresponding path program 7 times [2024-06-03 18:36:20,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:20,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952411043] [2024-06-03 18:36:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:20,624 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 18:36:20,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952411043] [2024-06-03 18:36:20,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952411043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:20,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:20,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:20,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605287305] [2024-06-03 18:36:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:20,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:20,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:20,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:20,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:20,675 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 18:36:20,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:20,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:20,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:20,860 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-03 18:36:20,860 INFO L125 PetriNetUnfolderBase]: For 10716/10720 co-relation queries the response was YES. [2024-06-03 18:36:20,862 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 18:36:20,864 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 55 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-03 18:36:20,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 963 flow [2024-06-03 18:36:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-03 18:36:20,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-03 18:36:20,866 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 109 transitions. [2024-06-03 18:36:20,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 963 flow [2024-06-03 18:36:20,881 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 18:36:20,882 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-03 18:36:20,883 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 18:36:20,883 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-03 18:36:20,883 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-03 18:36:20,883 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 18:36:20,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:20,884 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 18:36:20,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:36:20,884 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 18:36:20,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 632792271, now seen corresponding path program 8 times [2024-06-03 18:36:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80915425] [2024-06-03 18:36:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:21,175 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 18:36:21,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80915425] [2024-06-03 18:36:21,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80915425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:21,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632302534] [2024-06-03 18:36:21,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:21,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:21,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:21,254 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 18:36:21,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:21,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:21,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:21,401 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-03 18:36:21,402 INFO L125 PetriNetUnfolderBase]: For 9690/9690 co-relation queries the response was YES. [2024-06-03 18:36:21,403 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 18:36:21,405 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-03 18:36:21,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 941 flow [2024-06-03 18:36:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-03 18:36:21,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-03 18:36:21,407 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 112 transitions. [2024-06-03 18:36:21,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 941 flow [2024-06-03 18:36:21,425 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 18:36:21,427 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-03 18:36:21,427 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 18:36:21,428 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-03 18:36:21,428 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-03 18:36:21,428 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 18:36:21,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:21,428 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 18:36:21,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:36:21,429 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 18:36:21,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 625464801, now seen corresponding path program 9 times [2024-06-03 18:36:21,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:21,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122765831] [2024-06-03 18:36:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:21,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:21,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:21,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122765831] [2024-06-03 18:36:21,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122765831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:21,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570900992] [2024-06-03 18:36:21,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:21,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:21,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:21,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:21,802 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 18:36:21,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:21,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:21,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:21,938 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-03 18:36:21,938 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-03 18:36:21,939 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 18:36:21,941 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-03 18:36:21,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 893 flow [2024-06-03 18:36:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-03 18:36:21,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-03 18:36:21,956 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 109 transitions. [2024-06-03 18:36:21,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 893 flow [2024-06-03 18:36:21,971 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 18:36:21,972 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-03 18:36:21,973 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 18:36:21,974 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-03 18:36:21,974 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-03 18:36:21,974 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 18:36:21,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:21,974 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 18:36:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:36:21,975 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 18:36:21,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash 625469451, now seen corresponding path program 10 times [2024-06-03 18:36:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:21,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130545434] [2024-06-03 18:36:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:22,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130545434] [2024-06-03 18:36:22,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130545434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:22,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:22,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:22,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589529464] [2024-06-03 18:36:22,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:22,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:22,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:22,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:22,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:22,294 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 18:36:22,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:22,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:22,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:22,427 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-03 18:36:22,427 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-03 18:36:22,428 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 18:36:22,430 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-03 18:36:22,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 825 flow [2024-06-03 18:36:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-03 18:36:22,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385579937304075 [2024-06-03 18:36:22,433 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 108 transitions. [2024-06-03 18:36:22,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 825 flow [2024-06-03 18:36:22,444 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 18:36:22,445 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-03 18:36:22,445 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 18:36:22,446 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-03 18:36:22,446 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-03 18:36:22,446 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 18:36:22,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:22,446 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 18:36:22,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:36:22,447 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 18:36:22,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 61337465, now seen corresponding path program 11 times [2024-06-03 18:36:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13062480] [2024-06-03 18:36:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:22,702 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 18:36:22,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13062480] [2024-06-03 18:36:22,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13062480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:22,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:22,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889502723] [2024-06-03 18:36:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:22,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:22,774 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 18:36:22,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:22,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:22,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:22,927 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-03 18:36:22,927 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-03 18:36:22,929 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 18:36:22,930 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-03 18:36:22,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 760 flow [2024-06-03 18:36:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-03 18:36:22,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335423197492163 [2024-06-03 18:36:22,932 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 107 transitions. [2024-06-03 18:36:22,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 760 flow [2024-06-03 18:36:22,941 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 18:36:22,942 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-03 18:36:22,942 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 18:36:22,942 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-03 18:36:22,943 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-03 18:36:22,943 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 18:36:22,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:22,943 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 18:36:22,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:36:22,943 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 18:36:22,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash 54009995, now seen corresponding path program 12 times [2024-06-03 18:36:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:22,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040817632] [2024-06-03 18:36:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:23,188 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 18:36:23,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:23,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040817632] [2024-06-03 18:36:23,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040817632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:23,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:23,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:23,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114406346] [2024-06-03 18:36:23,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:23,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:23,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:23,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:23,246 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 18:36:23,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:23,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:23,379 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-03 18:36:23,379 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-03 18:36:23,381 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 18:36:23,382 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 42 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-03 18:36:23,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 686 flow [2024-06-03 18:36:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-03 18:36:23,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32601880877742945 [2024-06-03 18:36:23,383 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 104 transitions. [2024-06-03 18:36:23,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 686 flow [2024-06-03 18:36:23,391 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 18:36:23,392 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-03 18:36:23,392 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 18:36:23,392 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-03 18:36:23,393 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-03 18:36:23,393 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 18:36:23,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:23,393 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 18:36:23,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:36:23,393 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 18:36:23,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 54014645, now seen corresponding path program 13 times [2024-06-03 18:36:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55886679] [2024-06-03 18:36:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:23,659 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 18:36:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55886679] [2024-06-03 18:36:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55886679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146523664] [2024-06-03 18:36:23,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:23,729 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 18:36:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:23,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:23,845 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-03 18:36:23,845 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-03 18:36:23,846 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 18:36:23,846 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-03 18:36:23,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 630 flow [2024-06-03 18:36:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-03 18:36:23,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-03 18:36:23,849 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 103 transitions. [2024-06-03 18:36:23,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 630 flow [2024-06-03 18:36:23,854 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 18:36:23,855 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-03 18:36:23,855 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 18:36:23,856 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-03 18:36:23,856 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-03 18:36:23,856 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 18:36:23,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:23,856 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 18:36:23,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:36:23,857 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 18:36:23,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash -228823089, now seen corresponding path program 14 times [2024-06-03 18:36:23,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765877934] [2024-06-03 18:36:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:24,123 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 18:36:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765877934] [2024-06-03 18:36:24,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765877934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:24,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:24,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115099275] [2024-06-03 18:36:24,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:24,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:24,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:24,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:24,207 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 18:36:24,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:24,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:24,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:24,365 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-03 18:36:24,366 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-03 18:36:24,367 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 18:36:24,368 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 36 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-03 18:36:24,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 648 flow [2024-06-03 18:36:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-03 18:36:24,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-03 18:36:24,371 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 106 transitions. [2024-06-03 18:36:24,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 648 flow [2024-06-03 18:36:24,375 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 18:36:24,376 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-03 18:36:24,376 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 18:36:24,377 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-03 18:36:24,377 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-03 18:36:24,377 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 18:36:24,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:24,377 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 18:36:24,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:36:24,377 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 18:36:24,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:24,378 INFO L85 PathProgramCache]: Analyzing trace with hash -226920309, now seen corresponding path program 15 times [2024-06-03 18:36:24,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:24,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219290143] [2024-06-03 18:36:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:24,663 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 18:36:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219290143] [2024-06-03 18:36:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219290143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:24,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:24,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353724275] [2024-06-03 18:36:24,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:24,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:24,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:24,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 41 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 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 18:36:24,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:24,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:24,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:24,835 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-03 18:36:24,836 INFO L125 PetriNetUnfolderBase]: For 2766/2766 co-relation queries the response was YES. [2024-06-03 18:36:24,836 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 18:36:24,837 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 34 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-03 18:36:24,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 542 flow [2024-06-03 18:36:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-03 18:36:24,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-03 18:36:24,841 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 103 transitions. [2024-06-03 18:36:24,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 542 flow [2024-06-03 18:36:24,845 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 18:36:24,846 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-03 18:36:24,846 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 18:36:24,846 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-03 18:36:24,846 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-03 18:36:24,847 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 18:36:24,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:24,847 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 18:36:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:36:24,847 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 18:36:24,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash -226915659, now seen corresponding path program 16 times [2024-06-03 18:36:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:24,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906498457] [2024-06-03 18:36:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:25,130 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 18:36:25,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:25,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906498457] [2024-06-03 18:36:25,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906498457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:25,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:25,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909770927] [2024-06-03 18:36:25,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:25,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:25,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:25,200 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 18:36:25,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:25,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:25,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:25,302 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-03 18:36:25,302 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-03 18:36:25,303 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 18:36:25,304 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 30 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-03 18:36:25,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 496 flow [2024-06-03 18:36:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-03 18:36:25,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2024-06-03 18:36:25,313 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 102 transitions. [2024-06-03 18:36:25,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 496 flow [2024-06-03 18:36:25,317 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 18:36:25,318 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-03 18:36:25,318 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 18:36:25,319 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-03 18:36:25,319 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-03 18:36:25,319 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 18:36:25,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:25,319 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 18:36:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 18:36:25,321 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 18:36:25,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash -820728259, now seen corresponding path program 17 times [2024-06-03 18:36:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:25,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227107603] [2024-06-03 18:36:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:25,593 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 18:36:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227107603] [2024-06-03 18:36:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227107603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:25,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:25,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375950695] [2024-06-03 18:36:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:25,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:25,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:25,655 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 18:36:25,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:25,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:25,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:25,769 INFO L124 PetriNetUnfolderBase]: 147/278 cut-off events. [2024-06-03 18:36:25,769 INFO L125 PetriNetUnfolderBase]: For 2080/2088 co-relation queries the response was YES. [2024-06-03 18:36:25,769 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 18:36:25,770 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 28 selfloop transitions, 9 changer transitions 18/57 dead transitions. [2024-06-03 18:36:25,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 465 flow [2024-06-03 18:36:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-03 18:36:25,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-03 18:36:25,771 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 106 transitions. [2024-06-03 18:36:25,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 465 flow [2024-06-03 18:36:25,772 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 18:36:25,773 INFO L231 Difference]: Finished difference. Result has 61 places, 31 transitions, 195 flow [2024-06-03 18:36:25,773 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 18:36:25,774 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-03 18:36:25,774 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 31 transitions, 195 flow [2024-06-03 18:36:25,774 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 18:36:25,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:25,774 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 18:36:25,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 18:36:25,775 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 18:36:25,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -828051079, now seen corresponding path program 18 times [2024-06-03 18:36:25,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:25,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651432377] [2024-06-03 18:36:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:26,066 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 18:36:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651432377] [2024-06-03 18:36:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651432377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:26,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787627513] [2024-06-03 18:36:26,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:26,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:26,136 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 18:36:26,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:26,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:26,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:26,270 INFO L124 PetriNetUnfolderBase]: 127/246 cut-off events. [2024-06-03 18:36:26,270 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2024-06-03 18:36:26,270 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 18:36:26,271 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 10 changer transitions 13/51 dead transitions. [2024-06-03 18:36:26,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 379 flow [2024-06-03 18:36:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-03 18:36:26,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322884012539185 [2024-06-03 18:36:26,272 INFO L175 Difference]: Start difference. First operand has 61 places, 31 transitions, 195 flow. Second operand 11 states and 103 transitions. [2024-06-03 18:36:26,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 379 flow [2024-06-03 18:36:26,274 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 18:36:26,275 INFO L231 Difference]: Finished difference. Result has 56 places, 29 transitions, 175 flow [2024-06-03 18:36:26,275 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 18:36:26,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 25 predicate places. [2024-06-03 18:36:26,275 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 175 flow [2024-06-03 18:36:26,276 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 18:36:26,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:26,276 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 18:36:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 18:36:26,276 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 18:36:26,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash -828055729, now seen corresponding path program 19 times [2024-06-03 18:36:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:26,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815763146] [2024-06-03 18:36:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:26,531 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 18:36:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815763146] [2024-06-03 18:36:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815763146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:26,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:26,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589966364] [2024-06-03 18:36:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:26,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:26,586 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 18:36:26,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:26,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:26,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:26,696 INFO L124 PetriNetUnfolderBase]: 116/229 cut-off events. [2024-06-03 18:36:26,696 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-03 18:36:26,697 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 18:36:26,697 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 23 selfloop transitions, 7 changer transitions 17/49 dead transitions. [2024-06-03 18:36:26,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 361 flow [2024-06-03 18:36:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-03 18:36:26,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31974921630094044 [2024-06-03 18:36:26,701 INFO L175 Difference]: Start difference. First operand has 56 places, 29 transitions, 175 flow. Second operand 11 states and 102 transitions. [2024-06-03 18:36:26,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 361 flow [2024-06-03 18:36:26,702 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 18:36:26,703 INFO L231 Difference]: Finished difference. Result has 54 places, 25 transitions, 140 flow [2024-06-03 18:36:26,703 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 18:36:26,703 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-03 18:36:26,703 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 25 transitions, 140 flow [2024-06-03 18:36:26,703 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 18:36:26,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:26,704 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 18:36:26,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 18:36:26,704 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 18:36:26,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash -571377589, now seen corresponding path program 20 times [2024-06-03 18:36:26,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:26,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350883167] [2024-06-03 18:36:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:26,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:27,000 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 18:36:27,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:27,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350883167] [2024-06-03 18:36:27,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350883167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:27,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:27,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 18:36:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217213726] [2024-06-03 18:36:27,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:27,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 18:36:27,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 18:36:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-03 18:36:27,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-03 18:36:27,063 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 18:36:27,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:27,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-03 18:36:27,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:27,156 INFO L124 PetriNetUnfolderBase]: 58/124 cut-off events. [2024-06-03 18:36:27,157 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2024-06-03 18:36:27,157 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 18:36:27,157 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-03 18:36:27,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 39 transitions, 250 flow [2024-06-03 18:36:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:36:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:36:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-06-03 18:36:27,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29153605015673983 [2024-06-03 18:36:27,159 INFO L175 Difference]: Start difference. First operand has 54 places, 25 transitions, 140 flow. Second operand 11 states and 93 transitions. [2024-06-03 18:36:27,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 39 transitions, 250 flow [2024-06-03 18:36:27,159 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 18:36:27,160 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2024-06-03 18:36:27,160 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 18:36:27,160 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-06-03 18:36:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2024-06-03 18:36:27,161 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 18:36:27,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 18:36:27,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 18:36:27,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 18:36:27,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 18:36:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 18:36:27,170 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-03 18:36:27,173 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 18:36:27,173 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 18:36:27,177 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 18:36:27,177 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 18:36:27,182 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 06:36:27 BasicIcfg [2024-06-03 18:36:27,183 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 18:36:27,183 INFO L158 Benchmark]: Toolchain (without parser) took 28239.41ms. Allocated memory was 159.4MB in the beginning and 482.3MB in the end (delta: 323.0MB). Free memory was 99.2MB in the beginning and 425.0MB in the end (delta: -325.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:27,184 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:27,184 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:27,184 INFO L158 Benchmark]: CACSL2BoogieTranslator took 558.12ms. Allocated memory is still 159.4MB. Free memory was 99.2MB in the beginning and 73.4MB in the end (delta: 25.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,184 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.47ms. Allocated memory is still 159.4MB. Free memory was 73.4MB in the beginning and 71.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,185 INFO L158 Benchmark]: Boogie Preprocessor took 73.28ms. Allocated memory is still 159.4MB. Free memory was 71.3MB in the beginning and 69.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,188 INFO L158 Benchmark]: RCFGBuilder took 564.25ms. Allocated memory is still 159.4MB. Free memory was 68.9MB in the beginning and 104.9MB in the end (delta: -36.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,188 INFO L158 Benchmark]: TraceAbstraction took 26955.91ms. Allocated memory was 159.4MB in the beginning and 482.3MB in the end (delta: 323.0MB). Free memory was 104.2MB in the beginning and 425.0MB in the end (delta: -320.8MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,190 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 558.12ms. Allocated memory is still 159.4MB. Free memory was 99.2MB in the beginning and 73.4MB in the end (delta: 25.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.47ms. Allocated memory is still 159.4MB. Free memory was 73.4MB in the beginning and 71.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.28ms. Allocated memory is still 159.4MB. Free memory was 71.3MB in the beginning and 69.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.25ms. Allocated memory is still 159.4MB. Free memory was 68.9MB in the beginning and 104.9MB in the end (delta: -36.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * TraceAbstraction took 26955.91ms. Allocated memory was 159.4MB in the beginning and 482.3MB in the end (delta: 323.0MB). Free memory was 104.2MB in the beginning and 425.0MB in the end (delta: -320.8MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 721]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 722]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 26.8s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3402 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2968 mSDsluCounter, 574 SdHoareTripleChecker+Invalid, 6.6s 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, 5.5s 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.8s 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 18:36:27,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE