./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/fib_unsafe-5.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i ./goblint.2024-06-19_11-23-25.files/protection/fib_unsafe-5.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:07:00,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:07:00,650 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:07:00,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:07:00,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:07:00,694 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:07:00,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:07:00,695 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:07:00,696 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:07:00,700 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:07:00,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:07:00,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:07:00,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:07:00,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:07:00,703 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:07:00,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:07:00,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:07:00,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:07:00,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:07:00,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:07:00,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:07:00,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:07:00,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:07:00,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:07:00,705 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:07:00,706 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:07:00,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:07:00,706 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:07:00,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:07:00,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:07:00,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:07:00,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:07:00,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:07:00,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:07:00,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:07:00,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:07:00,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:07:00,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:07:00,709 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:07:00,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:07:00,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:07:00,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:07:00,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:07:00,710 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:07:00,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:07:00,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:07:00,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:07:00,977 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:07:00,979 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:07:00,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/fib_unsafe-5.yml/witness.yml [2024-06-21 16:07:01,114 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:07:01,115 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:07:01,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2024-06-21 16:07:02,267 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:07:02,527 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:07:02,528 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2024-06-21 16:07:02,540 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26569d17e/b5e807faa59644699e30c033550dbe37/FLAG6cef21c93 [2024-06-21 16:07:02,550 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26569d17e/b5e807faa59644699e30c033550dbe37 [2024-06-21 16:07:02,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:07:02,552 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:07:02,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:07:02,553 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:07:02,558 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:07:02,559 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:07:01" (1/2) ... [2024-06-21 16:07:02,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9574a7b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:07:02, skipping insertion in model container [2024-06-21 16:07:02,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:07:01" (1/2) ... [2024-06-21 16:07:02,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1971259b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:07:02, skipping insertion in model container [2024-06-21 16:07:02,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:07:02" (2/2) ... [2024-06-21 16:07:02,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9574a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:02, skipping insertion in model container [2024-06-21 16:07:02,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:07:02" (2/2) ... [2024-06-21 16:07:02,564 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:07:02,614 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:07:02,615 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-21 16:07:02,615 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] (((((((! multithreaded || 0 <= next) && (! multithreaded || 0 <= q)) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 0 <= cur)) && (! multithreaded || 1 <= j)) && (! multithreaded || 1 <= i) [2024-06-21 16:07:02,616 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:07:02,616 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-21 16:07:02,649 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:07:02,988 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:07:02,996 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:07:03,079 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:07:03,109 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:07:03,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03 WrapperNode [2024-06-21 16:07:03,109 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:07:03,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:07:03,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:07:03,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:07:03,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,149 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-21 16:07:03,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:07:03,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:07:03,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:07:03,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:07:03,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,196 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:07:03,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:07:03,226 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:07:03,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:07:03,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:07:03,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (1/1) ... [2024-06-21 16:07:03,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:07:03,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:07:03,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:07:03,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:07:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-21 16:07:03,306 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-21 16:07:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-21 16:07:03,307 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-21 16:07:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:07:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:07:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:07:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:07:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:07:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:07:03,310 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:07:03,427 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:07:03,428 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:07:03,608 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:07:03,608 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:07:03,737 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:07:03,737 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-21 16:07:03,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:07:03 BoogieIcfgContainer [2024-06-21 16:07:03,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:07:03,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:07:03,744 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:07:03,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:07:03,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:07:01" (1/4) ... [2024-06-21 16:07:03,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578415ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:07:03, skipping insertion in model container [2024-06-21 16:07:03,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:07:02" (2/4) ... [2024-06-21 16:07:03,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578415ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:07:03, skipping insertion in model container [2024-06-21 16:07:03,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:03" (3/4) ... [2024-06-21 16:07:03,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578415ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:07:03, skipping insertion in model container [2024-06-21 16:07:03,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:07:03" (4/4) ... [2024-06-21 16:07:03,755 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2024-06-21 16:07:03,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:07:03,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 16:07:03,786 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:07:03,843 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:07:03,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-21 16:07:03,908 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-21 16:07:03,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:07:03,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-21 16:07:03,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-21 16:07:03,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-21 16:07:03,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:07:03,943 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;@260cf86e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:07:03,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 16:07:03,949 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:07:03,953 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-21 16:07:03,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:07:03,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:03,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:03,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:03,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash 230814316, now seen corresponding path program 1 times [2024-06-21 16:07:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956737326] [2024-06-21 16:07:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:04,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956737326] [2024-06-21 16:07:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956737326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:04,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:04,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:07:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610479767] [2024-06-21 16:07:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:04,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:07:04,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:07:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:07:04,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:04,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:04,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:04,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:04,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:04,869 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-21 16:07:04,870 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 16:07:04,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 536 events. 322/536 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2105 event pairs, 53 based on Foata normal form. 21/506 useless extension candidates. Maximal degree in co-relation 1034. Up to 295 conditions per place. [2024-06-21 16:07:04,876 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 33 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-21 16:07:04,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 225 flow [2024-06-21 16:07:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:07:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:07:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 16:07:04,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-06-21 16:07:04,889 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 89 transitions. [2024-06-21 16:07:04,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 225 flow [2024-06-21 16:07:04,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 16:07:04,893 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-21 16:07:04,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-06-21 16:07:04,897 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-21 16:07:04,898 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-21 16:07:04,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:04,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:04,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:04,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:07:04,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:04,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -52698492, now seen corresponding path program 1 times [2024-06-21 16:07:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:04,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428500799] [2024-06-21 16:07:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:05,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428500799] [2024-06-21 16:07:05,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428500799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:05,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:05,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:05,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4833284] [2024-06-21 16:07:05,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:05,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:05,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:05,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:05,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:05,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:05,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:05,345 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-21 16:07:05,345 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-21 16:07:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 298 events. 160/298 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1096 event pairs, 13 based on Foata normal form. 10/308 useless extension candidates. Maximal degree in co-relation 762. Up to 115 conditions per place. [2024-06-21 16:07:05,351 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 41 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-21 16:07:05,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 289 flow [2024-06-21 16:07:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 16:07:05,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-21 16:07:05,357 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 98 transitions. [2024-06-21 16:07:05,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 289 flow [2024-06-21 16:07:05,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 16:07:05,364 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-21 16:07:05,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-21 16:07:05,366 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-21 16:07:05,367 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-21 16:07:05,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:05,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:05,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:05,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:07:05,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:05,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1633652470, now seen corresponding path program 1 times [2024-06-21 16:07:05,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:05,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195960881] [2024-06-21 16:07:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:05,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195960881] [2024-06-21 16:07:05,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195960881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:05,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:05,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:05,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793973573] [2024-06-21 16:07:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:05,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:05,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:05,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:05,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:05,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:05,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:05,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:05,849 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-21 16:07:05,850 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-21 16:07:05,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 273 events. 145/273 cut-off events. For 304/308 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 973 event pairs, 4 based on Foata normal form. 13/286 useless extension candidates. Maximal degree in co-relation 859. Up to 115 conditions per place. [2024-06-21 16:07:05,852 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-21 16:07:05,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 364 flow [2024-06-21 16:07:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 16:07:05,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-06-21 16:07:05,854 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 106 transitions. [2024-06-21 16:07:05,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 364 flow [2024-06-21 16:07:05,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 344 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 16:07:05,857 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-21 16:07:05,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-06-21 16:07:05,858 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-21 16:07:05,859 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-21 16:07:05,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:05,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:05,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:05,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:07:05,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:05,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash -659881598, now seen corresponding path program 1 times [2024-06-21 16:07:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:05,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173575014] [2024-06-21 16:07:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:05,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:06,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173575014] [2024-06-21 16:07:06,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173575014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:06,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:06,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:06,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778314584] [2024-06-21 16:07:06,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:06,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:06,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:06,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:06,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:06,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:06,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:06,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:06,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:06,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:06,191 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-21 16:07:06,192 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-21 16:07:06,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 315 events. 169/315 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1131 event pairs, 37 based on Foata normal form. 3/317 useless extension candidates. Maximal degree in co-relation 1054. Up to 179 conditions per place. [2024-06-21 16:07:06,195 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 16:07:06,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 346 flow [2024-06-21 16:07:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 16:07:06,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 16:07:06,197 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 84 transitions. [2024-06-21 16:07:06,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 346 flow [2024-06-21 16:07:06,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:06,202 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-21 16:07:06,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-06-21 16:07:06,204 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-21 16:07:06,204 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-21 16:07:06,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:06,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:06,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:07:06,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:06,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1018507759, now seen corresponding path program 1 times [2024-06-21 16:07:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:06,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001269339] [2024-06-21 16:07:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:06,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:06,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001269339] [2024-06-21 16:07:06,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001269339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:06,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:06,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:06,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954974098] [2024-06-21 16:07:06,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:06,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:06,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:06,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:06,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:06,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:06,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:06,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:06,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:06,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:06,668 INFO L124 PetriNetUnfolderBase]: 151/288 cut-off events. [2024-06-21 16:07:06,668 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-21 16:07:06,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 288 events. 151/288 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 997 event pairs, 31 based on Foata normal form. 9/296 useless extension candidates. Maximal degree in co-relation 990. Up to 176 conditions per place. [2024-06-21 16:07:06,671 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 32 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-21 16:07:06,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 347 flow [2024-06-21 16:07:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 16:07:06,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-06-21 16:07:06,672 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 89 transitions. [2024-06-21 16:07:06,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 347 flow [2024-06-21 16:07:06,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:07:06,675 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-21 16:07:06,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-06-21 16:07:06,676 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-21 16:07:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-21 16:07:06,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:06,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:06,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:06,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:07:06,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:06,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash -732814132, now seen corresponding path program 1 times [2024-06-21 16:07:06,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:06,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84510461] [2024-06-21 16:07:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:06,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:06,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84510461] [2024-06-21 16:07:06,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84510461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:06,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:06,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:06,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553701851] [2024-06-21 16:07:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:06,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:06,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:06,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 218 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:06,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:06,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:06,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:07,091 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-21 16:07:07,091 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-21 16:07:07,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 300 events. 157/300 cut-off events. For 637/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1045 event pairs, 31 based on Foata normal form. 5/305 useless extension candidates. Maximal degree in co-relation 1054. Up to 168 conditions per place. [2024-06-21 16:07:07,094 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-21 16:07:07,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 419 flow [2024-06-21 16:07:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 16:07:07,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-21 16:07:07,096 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 106 transitions. [2024-06-21 16:07:07,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 419 flow [2024-06-21 16:07:07,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 391 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:07:07,099 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-21 16:07:07,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-06-21 16:07:07,100 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 16:07:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-21 16:07:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:07,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:07,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:07:07,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:07,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash -640220558, now seen corresponding path program 2 times [2024-06-21 16:07:07,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101111834] [2024-06-21 16:07:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:07,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:07,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101111834] [2024-06-21 16:07:07,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101111834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:07,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:07,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:07,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977994078] [2024-06-21 16:07:07,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:07,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:07,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:07,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:07,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 266 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:07,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:07,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:07,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:07,491 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-21 16:07:07,491 INFO L125 PetriNetUnfolderBase]: For 808/812 co-relation queries the response was YES. [2024-06-21 16:07:07,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 314 events. 166/314 cut-off events. For 808/812 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1125 event pairs, 34 based on Foata normal form. 7/320 useless extension candidates. Maximal degree in co-relation 1196. Up to 192 conditions per place. [2024-06-21 16:07:07,494 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-21 16:07:07,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 482 flow [2024-06-21 16:07:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 16:07:07,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831417624521073 [2024-06-21 16:07:07,495 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 100 transitions. [2024-06-21 16:07:07,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 482 flow [2024-06-21 16:07:07,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 441 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:07,499 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-21 16:07:07,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=344, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-21 16:07:07,500 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-21 16:07:07,500 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-21 16:07:07,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:07,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:07,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:07,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:07:07,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:07,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash -834086502, now seen corresponding path program 3 times [2024-06-21 16:07:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:07,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307812706] [2024-06-21 16:07:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:07,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:07,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:07,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307812706] [2024-06-21 16:07:07,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307812706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:07,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:07,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700622979] [2024-06-21 16:07:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:07,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:07,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 344 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:07,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:07,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:07,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:07,938 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-21 16:07:07,938 INFO L125 PetriNetUnfolderBase]: For 984/992 co-relation queries the response was YES. [2024-06-21 16:07:07,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 327 events. 172/327 cut-off events. For 984/992 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1198 event pairs, 31 based on Foata normal form. 9/336 useless extension candidates. Maximal degree in co-relation 1325. Up to 199 conditions per place. [2024-06-21 16:07:07,940 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-21 16:07:07,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 562 flow [2024-06-21 16:07:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 16:07:07,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-06-21 16:07:07,942 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 102 transitions. [2024-06-21 16:07:07,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 562 flow [2024-06-21 16:07:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 535 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:07:07,946 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-21 16:07:07,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-06-21 16:07:07,947 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-21 16:07:07,947 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-21 16:07:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:07,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:07,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:07:07,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:07,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -639625912, now seen corresponding path program 4 times [2024-06-21 16:07:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865110406] [2024-06-21 16:07:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:08,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865110406] [2024-06-21 16:07:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865110406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109315208] [2024-06-21 16:07:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:08,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:08,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 417 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:08,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:08,342 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-21 16:07:08,342 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-21 16:07:08,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 339 events. 178/339 cut-off events. For 1234/1238 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1254 event pairs, 29 based on Foata normal form. 7/346 useless extension candidates. Maximal degree in co-relation 1464. Up to 209 conditions per place. [2024-06-21 16:07:08,346 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 48 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-21 16:07:08,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 647 flow [2024-06-21 16:07:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 16:07:08,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 16:07:08,347 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 103 transitions. [2024-06-21 16:07:08,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 647 flow [2024-06-21 16:07:08,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 605 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:08,354 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-21 16:07:08,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-06-21 16:07:08,355 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-21 16:07:08,355 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-21 16:07:08,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:08,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:08,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:08,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:07:08,356 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:08,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash -644982158, now seen corresponding path program 5 times [2024-06-21 16:07:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556361242] [2024-06-21 16:07:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:08,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556361242] [2024-06-21 16:07:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556361242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:08,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:08,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:08,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392780183] [2024-06-21 16:07:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:08,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:08,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:08,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:08,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:08,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 471 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:08,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:08,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:08,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:08,752 INFO L124 PetriNetUnfolderBase]: 181/341 cut-off events. [2024-06-21 16:07:08,753 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-21 16:07:08,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 341 events. 181/341 cut-off events. For 1490/1490 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1256 event pairs, 32 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 1568. Up to 211 conditions per place. [2024-06-21 16:07:08,756 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-21 16:07:08,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 687 flow [2024-06-21 16:07:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 16:07:08,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:08,758 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 99 transitions. [2024-06-21 16:07:08,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 687 flow [2024-06-21 16:07:08,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 647 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:08,765 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-21 16:07:08,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=519, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2024-06-21 16:07:08,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-21 16:07:08,768 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-21 16:07:08,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:08,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:08,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:07:08,770 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:08,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -466836938, now seen corresponding path program 6 times [2024-06-21 16:07:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546828469] [2024-06-21 16:07:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:09,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546828469] [2024-06-21 16:07:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546828469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:09,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:09,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:07:09,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604025251] [2024-06-21 16:07:09,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:09,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:07:09,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:09,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:07:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:07:09,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:09,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:09,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:09,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:09,200 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-21 16:07:09,201 INFO L125 PetriNetUnfolderBase]: For 1750/1754 co-relation queries the response was YES. [2024-06-21 16:07:09,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 340 events. 181/340 cut-off events. For 1750/1754 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1269 event pairs, 35 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 1621. Up to 219 conditions per place. [2024-06-21 16:07:09,204 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-21 16:07:09,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 755 flow [2024-06-21 16:07:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:07:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:07:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 16:07:09,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-06-21 16:07:09,206 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 101 transitions. [2024-06-21 16:07:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 755 flow [2024-06-21 16:07:09,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 699 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:09,213 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-21 16:07:09,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=578, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-21 16:07:09,213 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-21 16:07:09,213 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-21 16:07:09,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:09,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:09,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:07:09,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:09,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1467999858, now seen corresponding path program 1 times [2024-06-21 16:07:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260643827] [2024-06-21 16:07:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:09,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260643827] [2024-06-21 16:07:09,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260643827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:09,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:09,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945874555] [2024-06-21 16:07:09,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:09,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:09,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:09,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:09,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:09,742 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-21 16:07:09,742 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-21 16:07:09,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 376 events. 199/376 cut-off events. For 2368/2372 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1478 event pairs, 11 based on Foata normal form. 7/383 useless extension candidates. Maximal degree in co-relation 1892. Up to 157 conditions per place. [2024-06-21 16:07:09,746 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-21 16:07:09,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 952 flow [2024-06-21 16:07:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:07:09,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2024-06-21 16:07:09,747 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:07:09,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 952 flow [2024-06-21 16:07:09,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 869 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:09,757 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-21 16:07:09,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=579, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2024-06-21 16:07:09,759 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-21 16:07:09,760 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-21 16:07:09,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:09,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:07:09,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:09,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1992088830, now seen corresponding path program 2 times [2024-06-21 16:07:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:09,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855936313] [2024-06-21 16:07:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:09,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:10,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855936313] [2024-06-21 16:07:10,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855936313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:10,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:10,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:10,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749354347] [2024-06-21 16:07:10,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:10,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:10,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:10,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:10,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 579 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:10,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:10,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:10,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:10,273 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-21 16:07:10,273 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-21 16:07:10,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 410 events. 217/410 cut-off events. For 2951/2955 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1701 event pairs, 30 based on Foata normal form. 7/417 useless extension candidates. Maximal degree in co-relation 2117. Up to 238 conditions per place. [2024-06-21 16:07:10,277 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-21 16:07:10,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 921 flow [2024-06-21 16:07:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:07:10,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103448275862069 [2024-06-21 16:07:10,279 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:07:10,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 921 flow [2024-06-21 16:07:10,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 854 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:10,288 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-21 16:07:10,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=602, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-06-21 16:07:10,289 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-21 16:07:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-21 16:07:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:10,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:10,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:07:10,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:10,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1992085110, now seen corresponding path program 3 times [2024-06-21 16:07:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:10,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199103439] [2024-06-21 16:07:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199103439] [2024-06-21 16:07:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199103439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:10,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:10,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760515387] [2024-06-21 16:07:10,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:10,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:10,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:10,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:10,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 602 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:10,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:10,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:10,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:10,782 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-21 16:07:10,783 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-21 16:07:10,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 425 events. 226/425 cut-off events. For 3312/3316 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1753 event pairs, 38 based on Foata normal form. 7/432 useless extension candidates. Maximal degree in co-relation 2234. Up to 265 conditions per place. [2024-06-21 16:07:10,786 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-21 16:07:10,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 897 flow [2024-06-21 16:07:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 16:07:10,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-21 16:07:10,788 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 117 transitions. [2024-06-21 16:07:10,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 897 flow [2024-06-21 16:07:10,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 849 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:07:10,797 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-21 16:07:10,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=633, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-21 16:07:10,797 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-21 16:07:10,798 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-21 16:07:10,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:10,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:10,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:07:10,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:10,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1992084955, now seen corresponding path program 1 times [2024-06-21 16:07:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:10,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557108961] [2024-06-21 16:07:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:10,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:11,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557108961] [2024-06-21 16:07:11,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557108961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:11,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:11,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231564824] [2024-06-21 16:07:11,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:11,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:11,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:11,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:11,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:11,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:11,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:11,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:11,255 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-21 16:07:11,255 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-06-21 16:07:11,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 444 events. 235/444 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1880 event pairs, 34 based on Foata normal form. 3/447 useless extension candidates. Maximal degree in co-relation 2349. Up to 280 conditions per place. [2024-06-21 16:07:11,269 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-21 16:07:11,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 909 flow [2024-06-21 16:07:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 16:07:11,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-21 16:07:11,271 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 117 transitions. [2024-06-21 16:07:11,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 909 flow [2024-06-21 16:07:11,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 855 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:11,280 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-21 16:07:11,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-06-21 16:07:11,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-21 16:07:11,281 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-21 16:07:11,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:11,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:11,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:11,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:07:11,282 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:11,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824425, now seen corresponding path program 2 times [2024-06-21 16:07:11,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:11,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289967583] [2024-06-21 16:07:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:11,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289967583] [2024-06-21 16:07:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289967583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:11,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:11,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602847351] [2024-06-21 16:07:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:11,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:11,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:11,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:11,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:11,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:11,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:11,766 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-21 16:07:11,766 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-21 16:07:11,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 459 events. 244/459 cut-off events. For 4098/4098 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1947 event pairs, 38 based on Foata normal form. 3/462 useless extension candidates. Maximal degree in co-relation 2476. Up to 310 conditions per place. [2024-06-21 16:07:11,771 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-21 16:07:11,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 919 flow [2024-06-21 16:07:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:07:11,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 16:07:11,773 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:07:11,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 919 flow [2024-06-21 16:07:11,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 857 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:11,784 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-21 16:07:11,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=657, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2024-06-21 16:07:11,784 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-21 16:07:11,784 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-21 16:07:11,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:11,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:11,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:11,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:07:11,785 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:11,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1640029890, now seen corresponding path program 4 times [2024-06-21 16:07:11,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:11,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265289610] [2024-06-21 16:07:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:11,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265289610] [2024-06-21 16:07:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265289610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:12,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:12,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301702244] [2024-06-21 16:07:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:12,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:12,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:12,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:12,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:12,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:12,295 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-21 16:07:12,295 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-21 16:07:12,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2754 conditions, 491 events. 262/491 cut-off events. For 4948/4952 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2140 event pairs, 32 based on Foata normal form. 7/498 useless extension candidates. Maximal degree in co-relation 2698. Up to 328 conditions per place. [2024-06-21 16:07:12,300 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-21 16:07:12,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1007 flow [2024-06-21 16:07:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:07:12,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-21 16:07:12,302 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:07:12,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1007 flow [2024-06-21 16:07:12,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 953 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:12,315 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-21 16:07:12,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=687, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-06-21 16:07:12,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-21 16:07:12,315 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-21 16:07:12,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:12,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:12,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:12,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:07:12,316 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:12,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824270, now seen corresponding path program 5 times [2024-06-21 16:07:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:12,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074957019] [2024-06-21 16:07:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:12,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074957019] [2024-06-21 16:07:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074957019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:12,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:12,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296472157] [2024-06-21 16:07:12,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:12,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:12,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:12,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:12,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:12,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:12,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:12,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:12,836 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-21 16:07:12,836 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-21 16:07:12,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 508 events. 271/508 cut-off events. For 5670/5674 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2250 event pairs, 36 based on Foata normal form. 7/515 useless extension candidates. Maximal degree in co-relation 2835. Up to 355 conditions per place. [2024-06-21 16:07:12,841 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-21 16:07:12,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 986 flow [2024-06-21 16:07:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:07:12,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 16:07:12,843 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:07:12,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 986 flow [2024-06-21 16:07:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 942 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:07:12,857 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-21 16:07:12,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=716, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-06-21 16:07:12,859 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-21 16:07:12,859 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-21 16:07:12,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:12,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:12,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:12,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:07:12,860 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:12,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1646670245, now seen corresponding path program 3 times [2024-06-21 16:07:12,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:12,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132187544] [2024-06-21 16:07:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:12,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:13,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132187544] [2024-06-21 16:07:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132187544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:13,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:13,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135784745] [2024-06-21 16:07:13,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:13,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:13,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:13,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:13,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:13,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:13,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:13,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:13,375 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-21 16:07:13,375 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-21 16:07:13,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3069 conditions, 542 events. 289/542 cut-off events. For 6153/6157 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2473 event pairs, 38 based on Foata normal form. 13/555 useless extension candidates. Maximal degree in co-relation 3010. Up to 378 conditions per place. [2024-06-21 16:07:13,380 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-21 16:07:13,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1027 flow [2024-06-21 16:07:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 16:07:13,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:07:13,382 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 116 transitions. [2024-06-21 16:07:13,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1027 flow [2024-06-21 16:07:13,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 977 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:13,398 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-21 16:07:13,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=743, PETRI_PLACES=102, PETRI_TRANSITIONS=74} [2024-06-21 16:07:13,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-21 16:07:13,399 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-21 16:07:13,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:13,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:13,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:13,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:07:13,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:13,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1646433870, now seen corresponding path program 6 times [2024-06-21 16:07:13,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:13,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445620633] [2024-06-21 16:07:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445620633] [2024-06-21 16:07:13,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445620633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:13,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:13,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708139527] [2024-06-21 16:07:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:13,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:13,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 74 transitions, 743 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:13,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:13,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:13,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:13,882 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-21 16:07:13,882 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-21 16:07:13,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 559 events. 298/559 cut-off events. For 7239/7243 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2591 event pairs, 38 based on Foata normal form. 7/566 useless extension candidates. Maximal degree in co-relation 3228. Up to 394 conditions per place. [2024-06-21 16:07:13,887 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-21 16:07:13,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1056 flow [2024-06-21 16:07:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:07:13,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 16:07:13,889 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:07:13,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1056 flow [2024-06-21 16:07:13,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 1013 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:13,908 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-21 16:07:13,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=775, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2024-06-21 16:07:13,908 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-21 16:07:13,908 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-21 16:07:13,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:13,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:13,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:13,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:07:13,909 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:13,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1933848355, now seen corresponding path program 4 times [2024-06-21 16:07:13,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:13,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948580425] [2024-06-21 16:07:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:13,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:14,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948580425] [2024-06-21 16:07:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948580425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:14,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725374183] [2024-06-21 16:07:14,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:14,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:14,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:14,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:14,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:14,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:14,443 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-21 16:07:14,444 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-21 16:07:14,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 574 events. 307/574 cut-off events. For 7631/7631 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2662 event pairs, 36 based on Foata normal form. 3/577 useless extension candidates. Maximal degree in co-relation 3325. Up to 409 conditions per place. [2024-06-21 16:07:14,449 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-21 16:07:14,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1061 flow [2024-06-21 16:07:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:07:14,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 16:07:14,451 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:07:14,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1061 flow [2024-06-21 16:07:14,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 1011 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:14,471 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-21 16:07:14,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=795, PETRI_PLACES=108, PETRI_TRANSITIONS=76} [2024-06-21 16:07:14,472 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-21 16:07:14,472 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-21 16:07:14,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:14,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:14,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:14,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:07:14,473 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:14,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1808451193, now seen corresponding path program 5 times [2024-06-21 16:07:14,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148205713] [2024-06-21 16:07:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:14,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148205713] [2024-06-21 16:07:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148205713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:14,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:14,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304797286] [2024-06-21 16:07:14,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:14,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:14,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 76 transitions, 795 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:14,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:14,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:14,976 INFO L124 PetriNetUnfolderBase]: 325/606 cut-off events. [2024-06-21 16:07:14,976 INFO L125 PetriNetUnfolderBase]: For 8497/8497 co-relation queries the response was YES. [2024-06-21 16:07:14,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 606 events. 325/606 cut-off events. For 8497/8497 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2873 event pairs, 45 based on Foata normal form. 9/614 useless extension candidates. Maximal degree in co-relation 3528. Up to 429 conditions per place. [2024-06-21 16:07:14,985 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-21 16:07:14,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1107 flow [2024-06-21 16:07:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:07:14,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 16:07:14,986 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:07:14,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1107 flow [2024-06-21 16:07:15,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 1047 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:15,008 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-21 16:07:15,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=819, PETRI_PLACES=111, PETRI_TRANSITIONS=78} [2024-06-21 16:07:15,008 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 16:07:15,008 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-21 16:07:15,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:15,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:15,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:07:15,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:15,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687413, now seen corresponding path program 6 times [2024-06-21 16:07:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268718825] [2024-06-21 16:07:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:15,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268718825] [2024-06-21 16:07:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268718825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:15,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:15,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919910238] [2024-06-21 16:07:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:15,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:15,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:15,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:15,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:15,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:15,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:15,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:15,569 INFO L124 PetriNetUnfolderBase]: 334/623 cut-off events. [2024-06-21 16:07:15,569 INFO L125 PetriNetUnfolderBase]: For 9449/9449 co-relation queries the response was YES. [2024-06-21 16:07:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 623 events. 334/623 cut-off events. For 9449/9449 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2991 event pairs, 45 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 3689. Up to 445 conditions per place. [2024-06-21 16:07:15,575 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-21 16:07:15,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1103 flow [2024-06-21 16:07:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:07:15,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:15,576 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:07:15,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1103 flow [2024-06-21 16:07:15,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 1055 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:15,600 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-21 16:07:15,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=847, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-06-21 16:07:15,601 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-21 16:07:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-21 16:07:15,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:15,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:15,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:15,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:07:15,601 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:15,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687568, now seen corresponding path program 7 times [2024-06-21 16:07:15,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:15,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356733529] [2024-06-21 16:07:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:15,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:15,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356733529] [2024-06-21 16:07:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356733529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:15,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573864572] [2024-06-21 16:07:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:15,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:15,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:15,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 847 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:15,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:15,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:15,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:16,092 INFO L124 PetriNetUnfolderBase]: 343/638 cut-off events. [2024-06-21 16:07:16,093 INFO L125 PetriNetUnfolderBase]: For 10520/10524 co-relation queries the response was YES. [2024-06-21 16:07:16,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 638 events. 343/638 cut-off events. For 10520/10524 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3058 event pairs, 49 based on Foata normal form. 7/644 useless extension candidates. Maximal degree in co-relation 3858. Up to 460 conditions per place. [2024-06-21 16:07:16,099 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-21 16:07:16,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1168 flow [2024-06-21 16:07:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:07:16,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:16,101 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:07:16,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1168 flow [2024-06-21 16:07:16,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 97 transitions, 1104 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:16,123 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-21 16:07:16,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=862, PETRI_PLACES=117, PETRI_TRANSITIONS=80} [2024-06-21 16:07:16,124 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-21 16:07:16,124 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-21 16:07:16,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:16,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:16,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:07:16,125 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:16,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1480328864, now seen corresponding path program 8 times [2024-06-21 16:07:16,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:16,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202670551] [2024-06-21 16:07:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:16,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:16,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202670551] [2024-06-21 16:07:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202670551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089693509] [2024-06-21 16:07:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:16,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:16,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 80 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:16,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:16,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:16,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:16,582 INFO L124 PetriNetUnfolderBase]: 352/655 cut-off events. [2024-06-21 16:07:16,582 INFO L125 PetriNetUnfolderBase]: For 11310/11314 co-relation queries the response was YES. [2024-06-21 16:07:16,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 655 events. 352/655 cut-off events. For 11310/11314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3164 event pairs, 45 based on Foata normal form. 7/661 useless extension candidates. Maximal degree in co-relation 3987. Up to 460 conditions per place. [2024-06-21 16:07:16,588 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 75 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-21 16:07:16,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1243 flow [2024-06-21 16:07:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 16:07:16,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-21 16:07:16,589 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 112 transitions. [2024-06-21 16:07:16,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1243 flow [2024-06-21 16:07:16,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 1189 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:16,639 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-21 16:07:16,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=119, PETRI_TRANSITIONS=81} [2024-06-21 16:07:16,639 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-21 16:07:16,639 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-21 16:07:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:16,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:16,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:07:16,640 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1480390399, now seen corresponding path program 7 times [2024-06-21 16:07:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589465288] [2024-06-21 16:07:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:16,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:16,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589465288] [2024-06-21 16:07:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589465288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:16,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:16,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:16,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725886500] [2024-06-21 16:07:16,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:16,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:16,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:16,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:16,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:16,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 81 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:16,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:16,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:16,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:17,114 INFO L124 PetriNetUnfolderBase]: 361/670 cut-off events. [2024-06-21 16:07:17,114 INFO L125 PetriNetUnfolderBase]: For 11956/11960 co-relation queries the response was YES. [2024-06-21 16:07:17,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 670 events. 361/670 cut-off events. For 11956/11960 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3266 event pairs, 47 based on Foata normal form. 7/676 useless extension candidates. Maximal degree in co-relation 4104. Up to 487 conditions per place. [2024-06-21 16:07:17,126 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-21 16:07:17,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1181 flow [2024-06-21 16:07:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:07:17,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:17,128 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:07:17,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1181 flow [2024-06-21 16:07:17,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 1119 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:17,159 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-21 16:07:17,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=907, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-06-21 16:07:17,160 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-21 16:07:17,160 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-21 16:07:17,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:17,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:17,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:07:17,161 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:17,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:17,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1815087828, now seen corresponding path program 9 times [2024-06-21 16:07:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:17,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997266656] [2024-06-21 16:07:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:17,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:17,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997266656] [2024-06-21 16:07:17,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997266656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:17,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:17,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:17,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700125026] [2024-06-21 16:07:17,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:17,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:17,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:17,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:17,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:17,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:17,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:17,633 INFO L124 PetriNetUnfolderBase]: 370/687 cut-off events. [2024-06-21 16:07:17,634 INFO L125 PetriNetUnfolderBase]: For 13355/13355 co-relation queries the response was YES. [2024-06-21 16:07:17,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 687 events. 370/687 cut-off events. For 13355/13355 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3386 event pairs, 47 based on Foata normal form. 3/689 useless extension candidates. Maximal degree in co-relation 4277. Up to 502 conditions per place. [2024-06-21 16:07:17,640 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-21 16:07:17,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1240 flow [2024-06-21 16:07:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:07:17,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:17,641 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:07:17,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1240 flow [2024-06-21 16:07:17,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 1172 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:17,669 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-21 16:07:17,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=924, PETRI_PLACES=122, PETRI_TRANSITIONS=83} [2024-06-21 16:07:17,669 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-21 16:07:17,670 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-21 16:07:17,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:17,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:17,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:17,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:07:17,670 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:17,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:17,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1578762583, now seen corresponding path program 8 times [2024-06-21 16:07:17,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:17,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482381295] [2024-06-21 16:07:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482381295] [2024-06-21 16:07:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482381295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:17,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986809089] [2024-06-21 16:07:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:17,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:17,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 83 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:17,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:17,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:17,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:18,159 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-21 16:07:18,160 INFO L125 PetriNetUnfolderBase]: For 13987/13987 co-relation queries the response was YES. [2024-06-21 16:07:18,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 721 events. 388/721 cut-off events. For 13987/13987 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3616 event pairs, 43 based on Foata normal form. 9/729 useless extension candidates. Maximal degree in co-relation 4430. Up to 525 conditions per place. [2024-06-21 16:07:18,166 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 76 selfloop transitions, 24 changer transitions 1/104 dead transitions. [2024-06-21 16:07:18,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 104 transitions, 1255 flow [2024-06-21 16:07:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 16:07:18,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38275862068965516 [2024-06-21 16:07:18,172 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 111 transitions. [2024-06-21 16:07:18,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 104 transitions, 1255 flow [2024-06-21 16:07:18,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 1193 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:18,205 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-21 16:07:18,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=961, PETRI_PLACES=125, PETRI_TRANSITIONS=85} [2024-06-21 16:07:18,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-21 16:07:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-21 16:07:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:18,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:18,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:07:18,211 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1586806153, now seen corresponding path program 9 times [2024-06-21 16:07:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618408668] [2024-06-21 16:07:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618408668] [2024-06-21 16:07:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618408668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:18,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:18,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097509718] [2024-06-21 16:07:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:18,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:18,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 85 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:18,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:18,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:18,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:18,662 INFO L124 PetriNetUnfolderBase]: 388/723 cut-off events. [2024-06-21 16:07:18,662 INFO L125 PetriNetUnfolderBase]: For 15345/15349 co-relation queries the response was YES. [2024-06-21 16:07:18,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 723 events. 388/723 cut-off events. For 15345/15349 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3626 event pairs, 45 based on Foata normal form. 9/731 useless extension candidates. Maximal degree in co-relation 4554. Up to 540 conditions per place. [2024-06-21 16:07:18,668 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-21 16:07:18,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1273 flow [2024-06-21 16:07:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:07:18,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 16:07:18,669 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:07:18,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1273 flow [2024-06-21 16:07:18,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 1186 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:18,707 INFO L231 Difference]: Finished difference. Result has 127 places, 86 transitions, 964 flow [2024-06-21 16:07:18,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=964, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2024-06-21 16:07:18,710 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2024-06-21 16:07:18,710 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 964 flow [2024-06-21 16:07:18,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:18,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:18,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:18,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:07:18,711 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:18,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042373, now seen corresponding path program 10 times [2024-06-21 16:07:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:18,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469064044] [2024-06-21 16:07:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:18,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469064044] [2024-06-21 16:07:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469064044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:18,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260883269] [2024-06-21 16:07:18,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:18,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:18,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 964 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:18,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:18,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:18,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:19,119 INFO L124 PetriNetUnfolderBase]: 397/738 cut-off events. [2024-06-21 16:07:19,120 INFO L125 PetriNetUnfolderBase]: For 16408/16412 co-relation queries the response was YES. [2024-06-21 16:07:19,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4771 conditions, 738 events. 397/738 cut-off events. For 16408/16412 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3699 event pairs, 54 based on Foata normal form. 3/740 useless extension candidates. Maximal degree in co-relation 4699. Up to 556 conditions per place. [2024-06-21 16:07:19,126 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-21 16:07:19,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 103 transitions, 1256 flow [2024-06-21 16:07:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:07:19,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:19,129 INFO L175 Difference]: Start difference. First operand has 127 places, 86 transitions, 964 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:07:19,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 103 transitions, 1256 flow [2024-06-21 16:07:19,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1166 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:19,171 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 966 flow [2024-06-21 16:07:19,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=966, PETRI_PLACES=128, PETRI_TRANSITIONS=87} [2024-06-21 16:07:19,172 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-21 16:07:19,172 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 966 flow [2024-06-21 16:07:19,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:19,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:19,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:19,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:07:19,173 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:19,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042528, now seen corresponding path program 10 times [2024-06-21 16:07:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:19,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832194116] [2024-06-21 16:07:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:19,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832194116] [2024-06-21 16:07:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832194116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:19,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:19,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:07:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905187757] [2024-06-21 16:07:19,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:19,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:07:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:07:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:07:19,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:19,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 87 transitions, 966 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:19,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:19,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:19,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:19,620 INFO L124 PetriNetUnfolderBase]: 391/729 cut-off events. [2024-06-21 16:07:19,620 INFO L125 PetriNetUnfolderBase]: For 15414/15418 co-relation queries the response was YES. [2024-06-21 16:07:19,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 729 events. 391/729 cut-off events. For 15414/15418 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3662 event pairs, 52 based on Foata normal form. 3/731 useless extension candidates. Maximal degree in co-relation 4493. Up to 547 conditions per place. [2024-06-21 16:07:19,626 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-21 16:07:19,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 103 transitions, 1268 flow [2024-06-21 16:07:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:07:19,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 16:07:19,627 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 966 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:07:19,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 103 transitions, 1268 flow [2024-06-21 16:07:19,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 103 transitions, 1188 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:19,669 INFO L231 Difference]: Finished difference. Result has 130 places, 87 transitions, 942 flow [2024-06-21 16:07:19,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=942, PETRI_PLACES=130, PETRI_TRANSITIONS=87} [2024-06-21 16:07:19,669 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2024-06-21 16:07:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 87 transitions, 942 flow [2024-06-21 16:07:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:19,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:19,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:19,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:07:19,670 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:19,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1736643841, now seen corresponding path program 1 times [2024-06-21 16:07:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255217250] [2024-06-21 16:07:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:19,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:19,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255217250] [2024-06-21 16:07:19,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255217250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:19,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:19,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362109593] [2024-06-21 16:07:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:19,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:19,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:19,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:19,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:19,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 87 transitions, 942 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:19,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:19,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:19,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:20,198 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-21 16:07:20,199 INFO L125 PetriNetUnfolderBase]: For 18074/18078 co-relation queries the response was YES. [2024-06-21 16:07:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 784 events. 418/784 cut-off events. For 18074/18078 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3996 event pairs, 11 based on Foata normal form. 13/797 useless extension candidates. Maximal degree in co-relation 4724. Up to 442 conditions per place. [2024-06-21 16:07:20,203 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-21 16:07:20,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 122 transitions, 1504 flow [2024-06-21 16:07:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:07:20,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-06-21 16:07:20,215 INFO L175 Difference]: Start difference. First operand has 130 places, 87 transitions, 942 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:07:20,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 122 transitions, 1504 flow [2024-06-21 16:07:20,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1408 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:20,269 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-21 16:07:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=860, PETRI_PLACES=132, PETRI_TRANSITIONS=83} [2024-06-21 16:07:20,271 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-21 16:07:20,271 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-21 16:07:20,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:20,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:20,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:20,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:07:20,272 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:20,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1626998229, now seen corresponding path program 2 times [2024-06-21 16:07:20,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:20,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654445240] [2024-06-21 16:07:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:20,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:20,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:20,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654445240] [2024-06-21 16:07:20,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654445240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:20,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:20,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:20,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418382501] [2024-06-21 16:07:20,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:20,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:20,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:20,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:20,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:20,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 83 transitions, 860 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:20,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:20,769 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-21 16:07:20,769 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-21 16:07:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 705 events. 377/705 cut-off events. For 16016/16020 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3524 event pairs, 37 based on Foata normal form. 13/718 useless extension candidates. Maximal degree in co-relation 4149. Up to 443 conditions per place. [2024-06-21 16:07:20,774 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-21 16:07:20,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1332 flow [2024-06-21 16:07:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:07:20,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2024-06-21 16:07:20,777 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:07:20,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1332 flow [2024-06-21 16:07:20,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1262 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:07:20,833 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-21 16:07:20,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=806, PETRI_PLACES=126, PETRI_TRANSITIONS=80} [2024-06-21 16:07:20,834 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-21 16:07:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-21 16:07:20,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:20,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:20,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:20,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:07:20,835 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:20,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1625095449, now seen corresponding path program 3 times [2024-06-21 16:07:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180351886] [2024-06-21 16:07:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:21,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:21,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180351886] [2024-06-21 16:07:21,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180351886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:21,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:21,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529628327] [2024-06-21 16:07:21,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:21,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:21,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:21,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:21,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:21,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 806 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:21,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:21,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:21,316 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-21 16:07:21,316 INFO L125 PetriNetUnfolderBase]: For 15334/15334 co-relation queries the response was YES. [2024-06-21 16:07:21,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 669 events. 357/669 cut-off events. For 15334/15334 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3325 event pairs, 37 based on Foata normal form. 9/678 useless extension candidates. Maximal degree in co-relation 3846. Up to 423 conditions per place. [2024-06-21 16:07:21,321 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-21 16:07:21,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1204 flow [2024-06-21 16:07:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 16:07:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887147335423197 [2024-06-21 16:07:21,323 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 124 transitions. [2024-06-21 16:07:21,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1204 flow [2024-06-21 16:07:21,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 1152 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:21,346 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-21 16:07:21,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=782, PETRI_PLACES=123, PETRI_TRANSITIONS=78} [2024-06-21 16:07:21,347 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-21 16:07:21,347 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-21 16:07:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:21,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:21,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:21,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:07:21,348 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:21,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1625090799, now seen corresponding path program 4 times [2024-06-21 16:07:21,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:21,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097016276] [2024-06-21 16:07:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:21,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097016276] [2024-06-21 16:07:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097016276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:21,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995607681] [2024-06-21 16:07:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:21,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:21,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:21,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 782 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:21,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:21,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:21,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:21,855 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-21 16:07:21,855 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-21 16:07:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 652 events. 346/652 cut-off events. For 14321/14325 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3204 event pairs, 37 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 3691. Up to 406 conditions per place. [2024-06-21 16:07:21,859 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-21 16:07:21,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1132 flow [2024-06-21 16:07:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:07:21,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-21 16:07:21,866 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:07:21,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1132 flow [2024-06-21 16:07:21,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 1078 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:21,895 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-21 16:07:21,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=738, PETRI_PLACES=121, PETRI_TRANSITIONS=73} [2024-06-21 16:07:21,896 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-21 16:07:21,896 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-21 16:07:21,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:21,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:21,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:21,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:07:21,897 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:21,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:21,898 INFO L85 PathProgramCache]: Analyzing trace with hash -782989849, now seen corresponding path program 5 times [2024-06-21 16:07:21,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:21,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039147918] [2024-06-21 16:07:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:21,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:22,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:22,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039147918] [2024-06-21 16:07:22,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039147918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:22,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:22,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238874699] [2024-06-21 16:07:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:22,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:22,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:22,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 738 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:22,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:22,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:22,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:22,370 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-21 16:07:22,370 INFO L125 PetriNetUnfolderBase]: For 13009/13013 co-relation queries the response was YES. [2024-06-21 16:07:22,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 616 events. 329/616 cut-off events. For 13009/13013 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2982 event pairs, 33 based on Foata normal form. 13/629 useless extension candidates. Maximal degree in co-relation 3543. Up to 377 conditions per place. [2024-06-21 16:07:22,373 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-21 16:07:22,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1176 flow [2024-06-21 16:07:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:07:22,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-21 16:07:22,381 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:07:22,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1176 flow [2024-06-21 16:07:22,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 1089 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 16:07:22,406 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-21 16:07:22,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=671, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2024-06-21 16:07:22,407 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-21 16:07:22,407 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-21 16:07:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:22,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:22,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:22,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:07:22,408 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:22,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash -781087069, now seen corresponding path program 6 times [2024-06-21 16:07:22,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:22,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029535486] [2024-06-21 16:07:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:22,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029535486] [2024-06-21 16:07:22,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029535486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:22,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:22,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:22,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879150942] [2024-06-21 16:07:22,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:22,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:22,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:22,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:22,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:22,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:22,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:22,964 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-21 16:07:22,964 INFO L125 PetriNetUnfolderBase]: For 11019/11019 co-relation queries the response was YES. [2024-06-21 16:07:22,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 580 events. 309/580 cut-off events. For 11019/11019 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2773 event pairs, 33 based on Foata normal form. 9/589 useless extension candidates. Maximal degree in co-relation 3161. Up to 357 conditions per place. [2024-06-21 16:07:22,968 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-21 16:07:22,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1027 flow [2024-06-21 16:07:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:07:22,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761755485893417 [2024-06-21 16:07:22,969 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:07:22,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1027 flow [2024-06-21 16:07:22,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 985 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:22,989 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-21 16:07:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=111, PETRI_TRANSITIONS=68} [2024-06-21 16:07:22,990 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 16:07:22,990 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-21 16:07:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:22,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:22,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:07:22,991 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:22,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash -698560175, now seen corresponding path program 7 times [2024-06-21 16:07:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483950731] [2024-06-21 16:07:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483950731] [2024-06-21 16:07:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483950731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:23,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:23,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:23,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352922448] [2024-06-21 16:07:23,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:23,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:23,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:23,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:23,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:23,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 68 transitions, 649 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:23,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:23,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:23,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:23,459 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-21 16:07:23,459 INFO L125 PetriNetUnfolderBase]: For 10686/10686 co-relation queries the response was YES. [2024-06-21 16:07:23,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3079 conditions, 563 events. 298/563 cut-off events. For 10686/10686 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2681 event pairs, 15 based on Foata normal form. 9/572 useless extension candidates. Maximal degree in co-relation 3016. Up to 340 conditions per place. [2024-06-21 16:07:23,462 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-21 16:07:23,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 961 flow [2024-06-21 16:07:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 16:07:23,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-21 16:07:23,463 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 119 transitions. [2024-06-21 16:07:23,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 961 flow [2024-06-21 16:07:23,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 917 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:23,475 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-21 16:07:23,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=611, PETRI_PLACES=109, PETRI_TRANSITIONS=64} [2024-06-21 16:07:23,475 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-21 16:07:23,475 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-21 16:07:23,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:23,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:23,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:23,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:07:23,476 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:23,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -492829295, now seen corresponding path program 8 times [2024-06-21 16:07:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:23,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513424710] [2024-06-21 16:07:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:23,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:23,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513424710] [2024-06-21 16:07:23,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513424710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:23,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:23,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:23,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860336456] [2024-06-21 16:07:23,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:23,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:23,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:23,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 64 transitions, 611 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:23,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:23,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:23,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:23,964 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-21 16:07:23,964 INFO L125 PetriNetUnfolderBase]: For 9720/9724 co-relation queries the response was YES. [2024-06-21 16:07:23,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 538 events. 285/538 cut-off events. For 9720/9724 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2518 event pairs, 33 based on Foata normal form. 13/551 useless extension candidates. Maximal degree in co-relation 2909. Up to 319 conditions per place. [2024-06-21 16:07:23,968 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-21 16:07:23,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 939 flow [2024-06-21 16:07:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 16:07:23,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2024-06-21 16:07:23,969 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 122 transitions. [2024-06-21 16:07:23,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 939 flow [2024-06-21 16:07:23,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 90 transitions, 881 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:24,001 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-21 16:07:24,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=561, PETRI_PLACES=104, PETRI_TRANSITIONS=61} [2024-06-21 16:07:24,002 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-21 16:07:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-21 16:07:24,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:24,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:24,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:24,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:07:24,003 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:24,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -500156765, now seen corresponding path program 9 times [2024-06-21 16:07:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307826722] [2024-06-21 16:07:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:24,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:24,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:24,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307826722] [2024-06-21 16:07:24,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307826722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:24,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:24,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522710218] [2024-06-21 16:07:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:24,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:24,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:24,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:24,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 61 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:24,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:24,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:24,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:24,499 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-21 16:07:24,499 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-21 16:07:24,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 502 events. 265/502 cut-off events. For 8119/8119 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2312 event pairs, 33 based on Foata normal form. 9/511 useless extension candidates. Maximal degree in co-relation 2655. Up to 299 conditions per place. [2024-06-21 16:07:24,501 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 51 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-21 16:07:24,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 891 flow [2024-06-21 16:07:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 16:07:24,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-21 16:07:24,503 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 119 transitions. [2024-06-21 16:07:24,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 891 flow [2024-06-21 16:07:24,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 84 transitions, 843 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:24,512 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-21 16:07:24,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=537, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2024-06-21 16:07:24,512 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-21 16:07:24,512 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-21 16:07:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:24,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:24,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:24,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:07:24,513 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:24,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:24,514 INFO L85 PathProgramCache]: Analyzing trace with hash -500152115, now seen corresponding path program 10 times [2024-06-21 16:07:24,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:24,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902723939] [2024-06-21 16:07:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:24,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:24,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902723939] [2024-06-21 16:07:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902723939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:24,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472040337] [2024-06-21 16:07:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:24,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:24,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 537 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:24,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:24,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:25,002 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-21 16:07:25,002 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-21 16:07:25,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 485 events. 254/485 cut-off events. For 7368/7372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2198 event pairs, 15 based on Foata normal form. 13/498 useless extension candidates. Maximal degree in co-relation 2470. Up to 282 conditions per place. [2024-06-21 16:07:25,004 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-21 16:07:25,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 823 flow [2024-06-21 16:07:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 16:07:25,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36990595611285265 [2024-06-21 16:07:25,005 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 118 transitions. [2024-06-21 16:07:25,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 823 flow [2024-06-21 16:07:25,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 785 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:25,013 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-21 16:07:25,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=474, PETRI_PLACES=98, PETRI_TRANSITIONS=53} [2024-06-21 16:07:25,014 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-21 16:07:25,014 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-21 16:07:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:07:25,015 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:25,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1064284101, now seen corresponding path program 11 times [2024-06-21 16:07:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592563230] [2024-06-21 16:07:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:25,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:25,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592563230] [2024-06-21 16:07:25,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592563230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:25,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:25,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:25,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518059985] [2024-06-21 16:07:25,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:25,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:25,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 53 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:25,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:25,461 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-21 16:07:25,461 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-21 16:07:25,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 441 events. 236/441 cut-off events. For 6492/6496 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1941 event pairs, 32 based on Foata normal form. 13/454 useless extension candidates. Maximal degree in co-relation 2301. Up to 261 conditions per place. [2024-06-21 16:07:25,463 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-21 16:07:25,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 758 flow [2024-06-21 16:07:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 16:07:25,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-21 16:07:25,464 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 117 transitions. [2024-06-21 16:07:25,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 758 flow [2024-06-21 16:07:25,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 692 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-21 16:07:25,470 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-21 16:07:25,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2024-06-21 16:07:25,470 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-21 16:07:25,470 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-21 16:07:25,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:25,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:25,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:07:25,472 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:25,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:25,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1071611571, now seen corresponding path program 12 times [2024-06-21 16:07:25,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:25,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562407644] [2024-06-21 16:07:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:25,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:25,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562407644] [2024-06-21 16:07:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562407644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:25,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:25,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098473205] [2024-06-21 16:07:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:25,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:25,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:25,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 410 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:25,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:25,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:25,950 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-21 16:07:25,950 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-21 16:07:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 407 events. 216/407 cut-off events. For 5037/5041 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1760 event pairs, 32 based on Foata normal form. 13/420 useless extension candidates. Maximal degree in co-relation 2022. Up to 241 conditions per place. [2024-06-21 16:07:25,952 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 41 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-21 16:07:25,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 684 flow [2024-06-21 16:07:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 16:07:25,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 16:07:25,953 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 114 transitions. [2024-06-21 16:07:25,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 684 flow [2024-06-21 16:07:25,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 644 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:25,958 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-21 16:07:25,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=83, PETRI_TRANSITIONS=48} [2024-06-21 16:07:25,959 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-21 16:07:25,959 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-21 16:07:25,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:25,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:07:25,960 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:25,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash -234734293, now seen corresponding path program 13 times [2024-06-21 16:07:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:25,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558241416] [2024-06-21 16:07:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558241416] [2024-06-21 16:07:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558241416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:26,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:26,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352630087] [2024-06-21 16:07:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:26,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:26,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 48 transitions, 388 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:26,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:26,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:26,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:26,437 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-21 16:07:26,438 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-21 16:07:26,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 388 events. 205/388 cut-off events. For 4228/4228 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1630 event pairs, 32 based on Foata normal form. 9/397 useless extension candidates. Maximal degree in co-relation 1855. Up to 224 conditions per place. [2024-06-21 16:07:26,439 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-21 16:07:26,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 628 flow [2024-06-21 16:07:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 16:07:26,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 16:07:26,440 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 113 transitions. [2024-06-21 16:07:26,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 628 flow [2024-06-21 16:07:26,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 598 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:26,446 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-21 16:07:26,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=346, PETRI_PLACES=81, PETRI_TRANSITIONS=44} [2024-06-21 16:07:26,447 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-21 16:07:26,447 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-21 16:07:26,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:26,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:26,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:26,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:07:26,448 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1354444655, now seen corresponding path program 14 times [2024-06-21 16:07:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:26,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200992410] [2024-06-21 16:07:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:26,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:26,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200992410] [2024-06-21 16:07:26,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200992410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:26,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:26,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276008373] [2024-06-21 16:07:26,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:26,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:26,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 346 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:26,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:26,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:26,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:26,858 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-21 16:07:26,858 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-21 16:07:26,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 361 events. 192/361 cut-off events. For 3766/3768 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1483 event pairs, 28 based on Foata normal form. 11/372 useless extension candidates. Maximal degree in co-relation 1742. Up to 189 conditions per place. [2024-06-21 16:07:26,860 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 35 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-21 16:07:26,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 646 flow [2024-06-21 16:07:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 16:07:26,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:07:26,861 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 116 transitions. [2024-06-21 16:07:26,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 646 flow [2024-06-21 16:07:26,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 588 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:26,865 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-21 16:07:26,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=75, PETRI_TRANSITIONS=41} [2024-06-21 16:07:26,866 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-21 16:07:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-21 16:07:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:26,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:26,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:26,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:07:26,866 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:26,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1352541875, now seen corresponding path program 15 times [2024-06-21 16:07:26,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:26,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050099005] [2024-06-21 16:07:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:26,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:27,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:27,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050099005] [2024-06-21 16:07:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050099005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:27,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:27,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067820980] [2024-06-21 16:07:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:27,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:27,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:27,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 41 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:27,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:27,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:27,270 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-21 16:07:27,271 INFO L125 PetriNetUnfolderBase]: For 2766/2768 co-relation queries the response was YES. [2024-06-21 16:07:27,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 329 events. 172/329 cut-off events. For 2766/2768 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1305 event pairs, 28 based on Foata normal form. 11/340 useless extension candidates. Maximal degree in co-relation 1459. Up to 169 conditions per place. [2024-06-21 16:07:27,272 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 33 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-21 16:07:27,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 540 flow [2024-06-21 16:07:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:27,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 16:07:27,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 16:07:27,272 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 113 transitions. [2024-06-21 16:07:27,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 540 flow [2024-06-21 16:07:27,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 506 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:27,276 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-21 16:07:27,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2024-06-21 16:07:27,276 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-21 16:07:27,285 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-21 16:07:27,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:27,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:07:27,286 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:27,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash -433142353, now seen corresponding path program 16 times [2024-06-21 16:07:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510511776] [2024-06-21 16:07:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:27,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510511776] [2024-06-21 16:07:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510511776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:27,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:27,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:27,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473292560] [2024-06-21 16:07:27,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:27,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:27,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:27,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:27,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:27,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:27,692 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-21 16:07:27,692 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-21 16:07:27,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 310 events. 161/310 cut-off events. For 2279/2279 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1199 event pairs, 10 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1316. Up to 152 conditions per place. [2024-06-21 16:07:27,693 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 29 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-21 16:07:27,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 494 flow [2024-06-21 16:07:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 16:07:27,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-21 16:07:27,701 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 112 transitions. [2024-06-21 16:07:27,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 494 flow [2024-06-21 16:07:27,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 466 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:27,705 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-21 16:07:27,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-21 16:07:27,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-21 16:07:27,706 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-21 16:07:27,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:27,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:27,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:07:27,707 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:27,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1696999155, now seen corresponding path program 17 times [2024-06-21 16:07:27,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:27,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406728246] [2024-06-21 16:07:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:27,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406728246] [2024-06-21 16:07:27,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406728246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:27,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:27,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:27,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711273690] [2024-06-21 16:07:27,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:27,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:27,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:27,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:27,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:28,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:28,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:28,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:28,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:28,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:28,168 INFO L124 PetriNetUnfolderBase]: 147/282 cut-off events. [2024-06-21 16:07:28,169 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2024-06-21 16:07:28,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 282 events. 147/282 cut-off events. For 2031/2031 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1053 event pairs, 6 based on Foata normal form. 9/291 useless extension candidates. Maximal degree in co-relation 1203. Up to 131 conditions per place. [2024-06-21 16:07:28,170 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 8 changer transitions 19/56 dead transitions. [2024-06-21 16:07:28,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 459 flow [2024-06-21 16:07:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 16:07:28,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 16:07:28,171 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 114 transitions. [2024-06-21 16:07:28,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 459 flow [2024-06-21 16:07:28,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 408 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 16:07:28,174 INFO L231 Difference]: Finished difference. Result has 61 places, 30 transitions, 192 flow [2024-06-21 16:07:28,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=30} [2024-06-21 16:07:28,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-21 16:07:28,175 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 30 transitions, 192 flow [2024-06-21 16:07:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:28,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:28,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:07:28,176 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:28,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1946349825, now seen corresponding path program 18 times [2024-06-21 16:07:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377582564] [2024-06-21 16:07:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:28,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:28,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377582564] [2024-06-21 16:07:28,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377582564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:28,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:28,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:28,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005960255] [2024-06-21 16:07:28,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:28,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:28,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:28,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:28,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 30 transitions, 192 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:28,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:28,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:28,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:28,659 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2024-06-21 16:07:28,659 INFO L125 PetriNetUnfolderBase]: For 1345/1353 co-relation queries the response was YES. [2024-06-21 16:07:28,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 225 events. 118/225 cut-off events. For 1345/1353 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 775 event pairs, 24 based on Foata normal form. 17/242 useless extension candidates. Maximal degree in co-relation 905. Up to 110 conditions per place. [2024-06-21 16:07:28,660 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 21 selfloop transitions, 7 changer transitions 18/49 dead transitions. [2024-06-21 16:07:28,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 368 flow [2024-06-21 16:07:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 16:07:28,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-21 16:07:28,661 INFO L175 Difference]: Start difference. First operand has 61 places, 30 transitions, 192 flow. Second operand 11 states and 109 transitions. [2024-06-21 16:07:28,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 368 flow [2024-06-21 16:07:28,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 336 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:07:28,662 INFO L231 Difference]: Finished difference. Result has 55 places, 27 transitions, 153 flow [2024-06-21 16:07:28,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=27} [2024-06-21 16:07:28,662 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 16:07:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions, 153 flow [2024-06-21 16:07:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:28,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:28,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:28,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:07:28,663 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:28,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1953672645, now seen corresponding path program 19 times [2024-06-21 16:07:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:28,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313624223] [2024-06-21 16:07:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:28,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:28,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:28,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313624223] [2024-06-21 16:07:28,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313624223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:28,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:28,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:28,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496290337] [2024-06-21 16:07:28,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:28,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:28,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:28,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 27 transitions, 153 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:28,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:28,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:28,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:29,088 INFO L124 PetriNetUnfolderBase]: 98/191 cut-off events. [2024-06-21 16:07:29,088 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-06-21 16:07:29,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 191 events. 98/191 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 639 event pairs, 24 based on Foata normal form. 9/200 useless extension candidates. Maximal degree in co-relation 720. Up to 90 conditions per place. [2024-06-21 16:07:29,089 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 19 selfloop transitions, 8 changer transitions 13/43 dead transitions. [2024-06-21 16:07:29,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 43 transitions, 299 flow [2024-06-21 16:07:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-21 16:07:29,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-21 16:07:29,090 INFO L175 Difference]: Start difference. First operand has 55 places, 27 transitions, 153 flow. Second operand 11 states and 106 transitions. [2024-06-21 16:07:29,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 43 transitions, 299 flow [2024-06-21 16:07:29,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 265 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 16:07:29,092 INFO L231 Difference]: Finished difference. Result has 49 places, 25 transitions, 130 flow [2024-06-21 16:07:29,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=25} [2024-06-21 16:07:29,092 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-21 16:07:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 25 transitions, 130 flow [2024-06-21 16:07:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:29,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:29,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:29,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:07:29,093 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:07:29,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1953677295, now seen corresponding path program 20 times [2024-06-21 16:07:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015288180] [2024-06-21 16:07:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015288180] [2024-06-21 16:07:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015288180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:07:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187170855] [2024-06-21 16:07:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:07:29,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:29,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:07:29,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:07:29,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 16:07:29,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 25 transitions, 130 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:29,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:29,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 16:07:29,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:29,441 INFO L124 PetriNetUnfolderBase]: 42/96 cut-off events. [2024-06-21 16:07:29,441 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-06-21 16:07:29,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 96 events. 42/96 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 221 event pairs, 0 based on Foata normal form. 9/105 useless extension candidates. Maximal degree in co-relation 306. Up to 51 conditions per place. [2024-06-21 16:07:29,442 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2024-06-21 16:07:29,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 33 transitions, 204 flow [2024-06-21 16:07:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:07:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:07:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-06-21 16:07:29,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30407523510971785 [2024-06-21 16:07:29,443 INFO L175 Difference]: Start difference. First operand has 49 places, 25 transitions, 130 flow. Second operand 11 states and 97 transitions. [2024-06-21 16:07:29,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 33 transitions, 204 flow [2024-06-21 16:07:29,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 180 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 16:07:29,443 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 16:07:29,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-21 16:07:29,444 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-21 16:07:29,444 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 16:07:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:29,446 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 16:07:29,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 16:07:29,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 16:07:29,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 16:07:29,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:07:29,448 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-21 16:07:29,450 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 16:07:29,451 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 16:07:29,454 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 16:07:29,454 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 16:07:29,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 04:07:29 BasicIcfg [2024-06-21 16:07:29,455 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 16:07:29,455 INFO L158 Benchmark]: Toolchain (without parser) took 26903.61ms. Allocated memory was 148.9MB in the beginning and 316.7MB in the end (delta: 167.8MB). Free memory was 121.3MB in the beginning and 194.2MB in the end (delta: -72.9MB). Peak memory consumption was 94.6MB. Max. memory is 16.1GB. [2024-06-21 16:07:29,456 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 46.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:07:29,456 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 125.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:07:29,456 INFO L158 Benchmark]: CACSL2BoogieTranslator took 556.78ms. Allocated memory is still 148.9MB. Free memory was 121.3MB in the beginning and 103.1MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-21 16:07:29,456 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.68ms. Allocated memory is still 148.9MB. Free memory was 103.1MB in the beginning and 101.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:07:29,456 INFO L158 Benchmark]: Boogie Preprocessor took 75.15ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 98.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:07:29,457 INFO L158 Benchmark]: RCFGBuilder took 514.96ms. Allocated memory is still 148.9MB. Free memory was 98.8MB in the beginning and 73.2MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 16:07:29,457 INFO L158 Benchmark]: TraceAbstraction took 25711.64ms. Allocated memory was 148.9MB in the beginning and 316.7MB in the end (delta: 167.8MB). Free memory was 72.7MB in the beginning and 194.2MB in the end (delta: -121.5MB). Peak memory consumption was 47.8MB. Max. memory is 16.1GB. [2024-06-21 16:07:29,458 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 46.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 125.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 556.78ms. Allocated memory is still 148.9MB. Free memory was 121.3MB in the beginning and 103.1MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.68ms. Allocated memory is still 148.9MB. Free memory was 103.1MB in the beginning and 101.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.15ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 98.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 514.96ms. Allocated memory is still 148.9MB. Free memory was 98.8MB in the beginning and 73.2MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 25711.64ms. Allocated memory was 148.9MB in the beginning and 316.7MB in the end (delta: 167.8MB). Free memory was 72.7MB in the beginning and 194.2MB in the end (delta: -121.5MB). Peak memory consumption was 47.8MB. 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: 25.6s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 11.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3383 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2951 mSDsluCounter, 570 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 463 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15419 IncrementalHoareTripleChecker+Invalid, 15882 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 463 mSolverCounterUnsat, 102 mSDtfsCounter, 15419 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=966occurred in iteration=30, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 902 NumberOfCodeBlocks, 902 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 851 ConstructedInterpolants, 0 QuantifiedInterpolants, 17720 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 51 InterpolantComputations, 51 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 16:07:29,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE