./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/peterson.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/peterson.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-atomic/peterson.i ./goblint.2024-05-21_14-57-05.files/protection/peterson.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 18:36:11,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:36:11,967 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:36:11,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:36:11,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:36:12,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:36:12,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:36:12,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:36:12,009 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:36:12,009 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:36:12,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:36:12,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:36:12,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:36:12,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:36:12,012 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:36:12,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:36:12,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:36:12,015 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:36:12,015 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:36:12,016 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:36:12,016 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:36:12,016 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:36:12,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:36:12,017 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:36:12,017 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:36:12,017 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:36:12,018 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:36:12,018 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:36:12,018 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:36:12,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:36:12,019 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:36:12,019 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:36:12,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:36:12,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:36:12,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:36:12,020 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:36:12,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:36:12,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:36:12,021 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:36:12,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:36:12,021 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:36:12,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:36:12,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:36:12,022 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:36:12,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:36:12,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:36:12,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:36:12,273 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:36:12,274 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:36:12,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/peterson.yml/witness.yml [2024-06-03 18:36:12,372 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:36:12,372 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:36:12,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-03 18:36:13,364 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:36:13,586 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:36:13,587 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-03 18:36:13,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a662d7521/26d4f2e8a58341c6a7f2a184fae93bab/FLAGfdabf72f7 [2024-06-03 18:36:13,619 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a662d7521/26d4f2e8a58341c6a7f2a184fae93bab [2024-06-03 18:36:13,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:36:13,620 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:36:13,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:36:13,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:36:13,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:36:13,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:36:12" (1/2) ... [2024-06-03 18:36:13,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98fa073 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:36:13, skipping insertion in model container [2024-06-03 18:36:13,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:36:12" (1/2) ... [2024-06-03 18:36:13,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47645970 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:36:13, skipping insertion in model container [2024-06-03 18:36:13,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:36:13" (2/2) ... [2024-06-03 18:36:13,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98fa073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:13, skipping insertion in model container [2024-06-03 18:36:13,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:36:13" (2/2) ... [2024-06-03 18:36:13,629 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:36:13,657 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:36:13,657 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] (((! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1))) [2024-06-03 18:36:13,658 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] (((! multithreaded || ((0 <= turn && turn <= 1) && (turn == 0 || turn == 1))) && (! multithreaded || ((0 <= flag2 && flag2 <= 1) && (flag2 == 0 || flag2 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= flag1 && flag1 <= 1) && (flag1 == 0 || flag1 == 1))) [2024-06-03 18:36:13,658 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:36:13,658 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-03 18:36:13,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:36:13,950 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:36:13,957 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:36:14,051 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:36:14,084 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:36:14,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14 WrapperNode [2024-06-03 18:36:14,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:36:14,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:36:14,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:36:14,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:36:14,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,144 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 103 [2024-06-03 18:36:14,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:36:14,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:36:14,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:36:14,146 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:36:14,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,179 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 18:36:14,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,205 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:36:14,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:36:14,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:36:14,206 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:36:14,207 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (1/1) ... [2024-06-03 18:36:14,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:36:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:36:14,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 18:36:14,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 18:36:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-03 18:36:14,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-03 18:36:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-03 18:36:14,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-03 18:36:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:36:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:36:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:36:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:36:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:36:14,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:36:14,282 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:36:14,404 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:36:14,406 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:36:14,525 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:36:14,525 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:36:14,579 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:36:14,579 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-03 18:36:14,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:36:14 BoogieIcfgContainer [2024-06-03 18:36:14,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:36:14,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:36:14,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:36:14,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:36:14,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:36:12" (1/4) ... [2024-06-03 18:36:14,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff0f5c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:36:14, skipping insertion in model container [2024-06-03 18:36:14,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:36:13" (2/4) ... [2024-06-03 18:36:14,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff0f5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:36:14, skipping insertion in model container [2024-06-03 18:36:14,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:14" (3/4) ... [2024-06-03 18:36:14,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff0f5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:36:14, skipping insertion in model container [2024-06-03 18:36:14,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:36:14" (4/4) ... [2024-06-03 18:36:14,593 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2024-06-03 18:36:14,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:36:14,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 18:36:14,607 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:36:14,670 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-03 18:36:14,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 38 transitions, 90 flow [2024-06-03 18:36:14,751 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-06-03 18:36:14,752 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-03 18:36:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 36 events. 2/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-03 18:36:14,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 38 transitions, 90 flow [2024-06-03 18:36:14,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 77 flow [2024-06-03 18:36:14,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:36:14,768 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;@32da6d0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:36:14,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 18:36:14,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:36:14,775 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 18:36:14,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:36:14,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:14,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:36:14,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:14,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2026818422, now seen corresponding path program 1 times [2024-06-03 18:36:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181026686] [2024-06-03 18:36:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:15,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181026686] [2024-06-03 18:36:15,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181026686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:15,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:36:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217085362] [2024-06-03 18:36:15,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:15,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:36:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:15,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:36:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:36:15,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 38 [2024-06-03 18:36:15,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:15,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:15,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 38 [2024-06-03 18:36:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:15,310 INFO L124 PetriNetUnfolderBase]: 105/278 cut-off events. [2024-06-03 18:36:15,311 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-03 18:36:15,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 278 events. 105/278 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1295 event pairs, 50 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 441. Up to 168 conditions per place. [2024-06-03 18:36:15,316 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 21 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-06-03 18:36:15,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 140 flow [2024-06-03 18:36:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:36:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:36:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-03 18:36:15,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2024-06-03 18:36:15,327 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 77 flow. Second operand 3 states and 80 transitions. [2024-06-03 18:36:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 140 flow [2024-06-03 18:36:15,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:36:15,331 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 93 flow [2024-06-03 18:36:15,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-06-03 18:36:15,335 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-06-03 18:36:15,335 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 93 flow [2024-06-03 18:36:15,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:15,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:15,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:15,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:36:15,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:15,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2143230211, now seen corresponding path program 1 times [2024-06-03 18:36:15,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:15,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516736050] [2024-06-03 18:36:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:15,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516736050] [2024-06-03 18:36:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516736050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:15,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:15,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:36:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578633380] [2024-06-03 18:36:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:15,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:36:15,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:36:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:36:15,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-06-03 18:36:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2024-06-03 18:36:15,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:15,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-06-03 18:36:15,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:15,626 INFO L124 PetriNetUnfolderBase]: 121/291 cut-off events. [2024-06-03 18:36:15,626 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-06-03 18:36:15,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 291 events. 121/291 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1338 event pairs, 52 based on Foata normal form. 2/273 useless extension candidates. Maximal degree in co-relation 449. Up to 191 conditions per place. [2024-06-03 18:36:15,631 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 26 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-03 18:36:15,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 181 flow [2024-06-03 18:36:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:36:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:36:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 18:36:15,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6644736842105263 [2024-06-03 18:36:15,636 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 93 flow. Second operand 4 states and 101 transitions. [2024-06-03 18:36:15,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 181 flow [2024-06-03 18:36:15,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:36:15,641 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 117 flow [2024-06-03 18:36:15,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-06-03 18:36:15,643 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2024-06-03 18:36:15,644 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 117 flow [2024-06-03 18:36:15,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2024-06-03 18:36:15,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:15,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:15,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:36:15,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:15,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2015628212, now seen corresponding path program 1 times [2024-06-03 18:36:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:15,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779919346] [2024-06-03 18:36:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:15,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779919346] [2024-06-03 18:36:15,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779919346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:15,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:15,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:36:15,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842581243] [2024-06-03 18:36:15,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:15,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:36:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:36:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:36:15,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-06-03 18:36:15,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:15,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:15,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-06-03 18:36:15,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:15,920 INFO L124 PetriNetUnfolderBase]: 143/322 cut-off events. [2024-06-03 18:36:15,920 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-06-03 18:36:15,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 322 events. 143/322 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1470 event pairs, 51 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 537. Up to 185 conditions per place. [2024-06-03 18:36:15,924 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 31 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-03 18:36:15,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-03 18:36:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:36:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:36:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 18:36:15,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-06-03 18:36:15,930 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 117 flow. Second operand 5 states and 120 transitions. [2024-06-03 18:36:15,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-03 18:36:15,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 229 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:15,933 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 141 flow [2024-06-03 18:36:15,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-03 18:36:15,934 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2024-06-03 18:36:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 141 flow [2024-06-03 18:36:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:15,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:15,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:15,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:36:15,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:15,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash 88010942, now seen corresponding path program 1 times [2024-06-03 18:36:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:15,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874957313] [2024-06-03 18:36:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874957313] [2024-06-03 18:36:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874957313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:36:16,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300578004] [2024-06-03 18:36:16,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:36:16,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:36:16,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:36:16,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-06-03 18:36:16,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:16,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-06-03 18:36:16,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,107 INFO L124 PetriNetUnfolderBase]: 125/295 cut-off events. [2024-06-03 18:36:16,107 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-06-03 18:36:16,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 295 events. 125/295 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1320 event pairs, 46 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 580. Up to 200 conditions per place. [2024-06-03 18:36:16,110 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 26 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-03 18:36:16,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 221 flow [2024-06-03 18:36:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:36:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:36:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-03 18:36:16,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381578947368421 [2024-06-03 18:36:16,112 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 141 flow. Second operand 4 states and 97 transitions. [2024-06-03 18:36:16,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 221 flow [2024-06-03 18:36:16,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 209 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:16,114 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-03 18:36:16,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-03 18:36:16,115 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2024-06-03 18:36:16,115 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-03 18:36:16,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:36:16,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:16,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -967459819, now seen corresponding path program 1 times [2024-06-03 18:36:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192088641] [2024-06-03 18:36:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192088641] [2024-06-03 18:36:16,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192088641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:36:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775963587] [2024-06-03 18:36:16,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:36:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:36:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:36:16,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-06-03 18:36:16,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:16,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-06-03 18:36:16,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,309 INFO L124 PetriNetUnfolderBase]: 143/317 cut-off events. [2024-06-03 18:36:16,309 INFO L125 PetriNetUnfolderBase]: For 370/385 co-relation queries the response was YES. [2024-06-03 18:36:16,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 317 events. 143/317 cut-off events. For 370/385 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1372 event pairs, 54 based on Foata normal form. 3/308 useless extension candidates. Maximal degree in co-relation 678. Up to 220 conditions per place. [2024-06-03 18:36:16,311 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 32 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-06-03 18:36:16,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 286 flow [2024-06-03 18:36:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:36:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:36:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 18:36:16,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263157894736842 [2024-06-03 18:36:16,313 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 119 transitions. [2024-06-03 18:36:16,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 286 flow [2024-06-03 18:36:16,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 277 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:16,315 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 190 flow [2024-06-03 18:36:16,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-06-03 18:36:16,316 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2024-06-03 18:36:16,316 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 190 flow [2024-06-03 18:36:16,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:16,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:36:16,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:16,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1213753405, now seen corresponding path program 2 times [2024-06-03 18:36:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443009794] [2024-06-03 18:36:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:16,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443009794] [2024-06-03 18:36:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443009794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:36:16,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221439730] [2024-06-03 18:36:16,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:36:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:36:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:36:16,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-06-03 18:36:16,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:16,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-06-03 18:36:16,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,490 INFO L124 PetriNetUnfolderBase]: 142/321 cut-off events. [2024-06-03 18:36:16,490 INFO L125 PetriNetUnfolderBase]: For 555/568 co-relation queries the response was YES. [2024-06-03 18:36:16,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 321 events. 142/321 cut-off events. For 555/568 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1419 event pairs, 57 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 587. Up to 218 conditions per place. [2024-06-03 18:36:16,492 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 28 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-06-03 18:36:16,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 280 flow [2024-06-03 18:36:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:36:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:36:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 18:36:16,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-06-03 18:36:16,494 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 190 flow. Second operand 5 states and 115 transitions. [2024-06-03 18:36:16,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 280 flow [2024-06-03 18:36:16,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 270 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-03 18:36:16,497 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 205 flow [2024-06-03 18:36:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 18:36:16,500 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 15 predicate places. [2024-06-03 18:36:16,500 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 205 flow [2024-06-03 18:36:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:16,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:36:16,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:16,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1757601737, now seen corresponding path program 1 times [2024-06-03 18:36:16,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729174266] [2024-06-03 18:36:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:16,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729174266] [2024-06-03 18:36:16,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729174266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107405466] [2024-06-03 18:36:16,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:16,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:16,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:16,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,734 INFO L124 PetriNetUnfolderBase]: 195/457 cut-off events. [2024-06-03 18:36:16,734 INFO L125 PetriNetUnfolderBase]: For 900/914 co-relation queries the response was YES. [2024-06-03 18:36:16,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 457 events. 195/457 cut-off events. For 900/914 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2230 event pairs, 26 based on Foata normal form. 10/462 useless extension candidates. Maximal degree in co-relation 865. Up to 134 conditions per place. [2024-06-03 18:36:16,737 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 48 selfloop transitions, 12 changer transitions 2/75 dead transitions. [2024-06-03 18:36:16,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 439 flow [2024-06-03 18:36:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:36:16,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-06-03 18:36:16,738 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 205 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:36:16,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 439 flow [2024-06-03 18:36:16,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 412 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:16,742 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 235 flow [2024-06-03 18:36:16,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-03 18:36:16,744 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-06-03 18:36:16,744 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 235 flow [2024-06-03 18:36:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:16,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:36:16,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:16,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1026875080, now seen corresponding path program 1 times [2024-06-03 18:36:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527508178] [2024-06-03 18:36:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:16,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:16,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527508178] [2024-06-03 18:36:16,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527508178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:16,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114812420] [2024-06-03 18:36:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:16,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:16,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:16,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:16,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:16,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:16,978 INFO L124 PetriNetUnfolderBase]: 241/548 cut-off events. [2024-06-03 18:36:16,978 INFO L125 PetriNetUnfolderBase]: For 1492/1511 co-relation queries the response was YES. [2024-06-03 18:36:16,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 548 events. 241/548 cut-off events. For 1492/1511 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2768 event pairs, 54 based on Foata normal form. 14/554 useless extension candidates. Maximal degree in co-relation 1213. Up to 178 conditions per place. [2024-06-03 18:36:16,982 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 43 selfloop transitions, 22 changer transitions 1/79 dead transitions. [2024-06-03 18:36:16,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 511 flow [2024-06-03 18:36:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:36:16,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-06-03 18:36:16,984 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 235 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:36:16,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 511 flow [2024-06-03 18:36:16,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 501 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-03 18:36:16,987 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 356 flow [2024-06-03 18:36:16,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-03 18:36:16,991 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-06-03 18:36:16,991 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 356 flow [2024-06-03 18:36:16,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:16,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:16,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:16,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:36:16,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1964784294, now seen corresponding path program 2 times [2024-06-03 18:36:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265225329] [2024-06-03 18:36:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:17,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:17,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265225329] [2024-06-03 18:36:17,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265225329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:17,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:17,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256903566] [2024-06-03 18:36:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:17,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:17,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:17,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:17,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:17,223 INFO L124 PetriNetUnfolderBase]: 271/624 cut-off events. [2024-06-03 18:36:17,223 INFO L125 PetriNetUnfolderBase]: For 2385/2412 co-relation queries the response was YES. [2024-06-03 18:36:17,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 624 events. 271/624 cut-off events. For 2385/2412 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3324 event pairs, 59 based on Foata normal form. 20/632 useless extension candidates. Maximal degree in co-relation 1609. Up to 185 conditions per place. [2024-06-03 18:36:17,226 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 44 selfloop transitions, 24 changer transitions 1/82 dead transitions. [2024-06-03 18:36:17,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 640 flow [2024-06-03 18:36:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:36:17,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-06-03 18:36:17,228 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 356 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:36:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 640 flow [2024-06-03 18:36:17,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 626 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-03 18:36:17,232 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 439 flow [2024-06-03 18:36:17,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-03 18:36:17,233 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2024-06-03 18:36:17,233 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 439 flow [2024-06-03 18:36:17,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:17,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:17,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:36:17,234 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:17,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash -192236666, now seen corresponding path program 3 times [2024-06-03 18:36:17,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:17,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740648911] [2024-06-03 18:36:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:17,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:17,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740648911] [2024-06-03 18:36:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740648911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:17,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:17,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:17,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033461341] [2024-06-03 18:36:17,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:17,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:17,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:17,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 439 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:17,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:17,399 INFO L124 PetriNetUnfolderBase]: 265/619 cut-off events. [2024-06-03 18:36:17,399 INFO L125 PetriNetUnfolderBase]: For 2930/2959 co-relation queries the response was YES. [2024-06-03 18:36:17,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 619 events. 265/619 cut-off events. For 2930/2959 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3280 event pairs, 46 based on Foata normal form. 12/623 useless extension candidates. Maximal degree in co-relation 1502. Up to 160 conditions per place. [2024-06-03 18:36:17,403 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 44 selfloop transitions, 21 changer transitions 2/80 dead transitions. [2024-06-03 18:36:17,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 675 flow [2024-06-03 18:36:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:36:17,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-06-03 18:36:17,404 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 439 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:36:17,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 675 flow [2024-06-03 18:36:17,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 643 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:17,409 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 455 flow [2024-06-03 18:36:17,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-06-03 18:36:17,410 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2024-06-03 18:36:17,410 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 455 flow [2024-06-03 18:36:17,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:17,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:17,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:36:17,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:17,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1075714408, now seen corresponding path program 1 times [2024-06-03 18:36:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:17,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185298207] [2024-06-03 18:36:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:17,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:17,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185298207] [2024-06-03 18:36:17,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185298207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:17,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:17,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:17,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984415961] [2024-06-03 18:36:17,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:17,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:17,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:17,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:17,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:17,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:17,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:17,583 INFO L124 PetriNetUnfolderBase]: 259/606 cut-off events. [2024-06-03 18:36:17,584 INFO L125 PetriNetUnfolderBase]: For 3100/3123 co-relation queries the response was YES. [2024-06-03 18:36:17,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 606 events. 259/606 cut-off events. For 3100/3123 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3214 event pairs, 59 based on Foata normal form. 18/616 useless extension candidates. Maximal degree in co-relation 1616. Up to 182 conditions per place. [2024-06-03 18:36:17,587 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 42 selfloop transitions, 26 changer transitions 1/82 dead transitions. [2024-06-03 18:36:17,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 699 flow [2024-06-03 18:36:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:36:17,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-06-03 18:36:17,589 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 455 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:36:17,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 699 flow [2024-06-03 18:36:17,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 646 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:17,595 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 494 flow [2024-06-03 18:36:17,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-06-03 18:36:17,596 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2024-06-03 18:36:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 494 flow [2024-06-03 18:36:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:17,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:17,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:36:17,596 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:17,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1664368100, now seen corresponding path program 2 times [2024-06-03 18:36:17,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:17,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800318386] [2024-06-03 18:36:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:17,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:17,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:17,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800318386] [2024-06-03 18:36:17,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800318386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:17,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907446265] [2024-06-03 18:36:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:17,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:17,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:17,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 494 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:17,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:17,777 INFO L124 PetriNetUnfolderBase]: 260/612 cut-off events. [2024-06-03 18:36:17,777 INFO L125 PetriNetUnfolderBase]: For 3536/3557 co-relation queries the response was YES. [2024-06-03 18:36:17,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 612 events. 260/612 cut-off events. For 3536/3557 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3211 event pairs, 54 based on Foata normal form. 10/618 useless extension candidates. Maximal degree in co-relation 1567. Up to 160 conditions per place. [2024-06-03 18:36:17,782 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 45 selfloop transitions, 23 changer transitions 2/83 dead transitions. [2024-06-03 18:36:17,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 747 flow [2024-06-03 18:36:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 18:36:17,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2024-06-03 18:36:17,783 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 494 flow. Second operand 6 states and 140 transitions. [2024-06-03 18:36:17,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 747 flow [2024-06-03 18:36:17,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 83 transitions, 679 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:36:17,789 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 520 flow [2024-06-03 18:36:17,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2024-06-03 18:36:17,789 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2024-06-03 18:36:17,789 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 520 flow [2024-06-03 18:36:17,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:17,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:17,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:36:17,790 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:17,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -590652925, now seen corresponding path program 1 times [2024-06-03 18:36:17,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:17,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862063413] [2024-06-03 18:36:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:17,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:17,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:17,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862063413] [2024-06-03 18:36:17,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862063413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:17,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:17,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039505668] [2024-06-03 18:36:17,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:17,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:17,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:17,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 520 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:17,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:17,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:17,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:18,005 INFO L124 PetriNetUnfolderBase]: 285/681 cut-off events. [2024-06-03 18:36:18,006 INFO L125 PetriNetUnfolderBase]: For 4345/4364 co-relation queries the response was YES. [2024-06-03 18:36:18,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 681 events. 285/681 cut-off events. For 4345/4364 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3858 event pairs, 83 based on Foata normal form. 11/688 useless extension candidates. Maximal degree in co-relation 1904. Up to 213 conditions per place. [2024-06-03 18:36:18,010 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 56 selfloop transitions, 21 changer transitions 2/92 dead transitions. [2024-06-03 18:36:18,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 837 flow [2024-06-03 18:36:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 18:36:18,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-06-03 18:36:18,012 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 520 flow. Second operand 6 states and 138 transitions. [2024-06-03 18:36:18,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 837 flow [2024-06-03 18:36:18,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 92 transitions, 788 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:18,019 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 577 flow [2024-06-03 18:36:18,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-06-03 18:36:18,020 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 45 predicate places. [2024-06-03 18:36:18,020 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 577 flow [2024-06-03 18:36:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:18,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:18,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:36:18,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:18,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 968445057, now seen corresponding path program 1 times [2024-06-03 18:36:18,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:18,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656807403] [2024-06-03 18:36:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:18,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656807403] [2024-06-03 18:36:18,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656807403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:18,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:18,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:36:18,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215539608] [2024-06-03 18:36:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:18,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:18,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:18,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:18,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 577 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:18,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:18,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:18,218 INFO L124 PetriNetUnfolderBase]: 306/735 cut-off events. [2024-06-03 18:36:18,219 INFO L125 PetriNetUnfolderBase]: For 5523/5543 co-relation queries the response was YES. [2024-06-03 18:36:18,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 735 events. 306/735 cut-off events. For 5523/5543 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4258 event pairs, 39 based on Foata normal form. 16/744 useless extension candidates. Maximal degree in co-relation 2543. Up to 211 conditions per place. [2024-06-03 18:36:18,223 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 62 selfloop transitions, 22 changer transitions 2/99 dead transitions. [2024-06-03 18:36:18,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 914 flow [2024-06-03 18:36:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:36:18,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-06-03 18:36:18,225 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 577 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:36:18,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 914 flow [2024-06-03 18:36:18,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 883 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 18:36:18,232 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 659 flow [2024-06-03 18:36:18,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2024-06-03 18:36:18,233 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2024-06-03 18:36:18,233 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 659 flow [2024-06-03 18:36:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:18,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:18,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:36:18,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:18,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash -207594140, now seen corresponding path program 1 times [2024-06-03 18:36:18,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977931042] [2024-06-03 18:36:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:18,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977931042] [2024-06-03 18:36:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977931042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:18,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:18,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:36:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189579309] [2024-06-03 18:36:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:18,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-03 18:36:18,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 659 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:18,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-03 18:36:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:18,523 INFO L124 PetriNetUnfolderBase]: 521/1095 cut-off events. [2024-06-03 18:36:18,523 INFO L125 PetriNetUnfolderBase]: For 5825/5831 co-relation queries the response was YES. [2024-06-03 18:36:18,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 1095 events. 521/1095 cut-off events. For 5825/5831 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6468 event pairs, 153 based on Foata normal form. 34/1105 useless extension candidates. Maximal degree in co-relation 3275. Up to 357 conditions per place. [2024-06-03 18:36:18,530 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 63 selfloop transitions, 41 changer transitions 4/125 dead transitions. [2024-06-03 18:36:18,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 1076 flow [2024-06-03 18:36:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-03 18:36:18,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710526315789474 [2024-06-03 18:36:18,531 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 659 flow. Second operand 10 states and 217 transitions. [2024-06-03 18:36:18,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 1076 flow [2024-06-03 18:36:18,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 996 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:18,542 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 869 flow [2024-06-03 18:36:18,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=869, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2024-06-03 18:36:18,543 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2024-06-03 18:36:18,543 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 869 flow [2024-06-03 18:36:18,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:18,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:18,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:36:18,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:18,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -273088864, now seen corresponding path program 2 times [2024-06-03 18:36:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222591974] [2024-06-03 18:36:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:18,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:18,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222591974] [2024-06-03 18:36:18,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222591974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:18,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910387875] [2024-06-03 18:36:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:18,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:18,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:18,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:18,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:18,765 INFO L124 PetriNetUnfolderBase]: 380/910 cut-off events. [2024-06-03 18:36:18,765 INFO L125 PetriNetUnfolderBase]: For 8827/8861 co-relation queries the response was YES. [2024-06-03 18:36:18,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 910 events. 380/910 cut-off events. For 8827/8861 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5658 event pairs, 103 based on Foata normal form. 9/904 useless extension candidates. Maximal degree in co-relation 3267. Up to 258 conditions per place. [2024-06-03 18:36:18,772 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 57 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-03 18:36:18,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 1246 flow [2024-06-03 18:36:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:36:18,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-03 18:36:18,774 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 869 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:36:18,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 1246 flow [2024-06-03 18:36:18,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 1246 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 18:36:18,789 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 989 flow [2024-06-03 18:36:18,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=989, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-06-03 18:36:18,789 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 72 predicate places. [2024-06-03 18:36:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 989 flow [2024-06-03 18:36:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:18,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:36:18,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -681728894, now seen corresponding path program 3 times [2024-06-03 18:36:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329882259] [2024-06-03 18:36:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:18,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329882259] [2024-06-03 18:36:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329882259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:18,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:18,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117822727] [2024-06-03 18:36:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:18,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:18,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:18,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:18,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 989 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:18,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:18,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:18,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:19,000 INFO L124 PetriNetUnfolderBase]: 378/907 cut-off events. [2024-06-03 18:36:19,001 INFO L125 PetriNetUnfolderBase]: For 9944/9978 co-relation queries the response was YES. [2024-06-03 18:36:19,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 907 events. 378/907 cut-off events. For 9944/9978 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5658 event pairs, 98 based on Foata normal form. 5/897 useless extension candidates. Maximal degree in co-relation 3430. Up to 257 conditions per place. [2024-06-03 18:36:19,008 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 56 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-03 18:36:19,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 1334 flow [2024-06-03 18:36:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:36:19,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-03 18:36:19,009 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 989 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:36:19,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 1334 flow [2024-06-03 18:36:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 112 transitions, 1290 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:19,026 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 1056 flow [2024-06-03 18:36:19,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1056, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2024-06-03 18:36:19,026 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 77 predicate places. [2024-06-03 18:36:19,026 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 1056 flow [2024-06-03 18:36:19,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:19,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:19,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:36:19,027 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:19,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1380998671, now seen corresponding path program 1 times [2024-06-03 18:36:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992292674] [2024-06-03 18:36:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:19,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:19,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992292674] [2024-06-03 18:36:19,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992292674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:19,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:19,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932311988] [2024-06-03 18:36:19,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:19,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:19,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:19,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 1056 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:19,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:19,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:19,276 INFO L124 PetriNetUnfolderBase]: 374/892 cut-off events. [2024-06-03 18:36:19,276 INFO L125 PetriNetUnfolderBase]: For 11645/11691 co-relation queries the response was YES. [2024-06-03 18:36:19,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4333 conditions, 892 events. 374/892 cut-off events. For 11645/11691 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5485 event pairs, 80 based on Foata normal form. 14/883 useless extension candidates. Maximal degree in co-relation 3742. Up to 255 conditions per place. [2024-06-03 18:36:19,282 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 69 selfloop transitions, 37 changer transitions 0/128 dead transitions. [2024-06-03 18:36:19,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 128 transitions, 1507 flow [2024-06-03 18:36:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 18:36:19,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-06-03 18:36:19,284 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 1056 flow. Second operand 6 states and 148 transitions. [2024-06-03 18:36:19,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 128 transitions, 1507 flow [2024-06-03 18:36:19,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 1460 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:19,301 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 1214 flow [2024-06-03 18:36:19,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1214, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2024-06-03 18:36:19,302 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 83 predicate places. [2024-06-03 18:36:19,302 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 1214 flow [2024-06-03 18:36:19,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:19,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:36:19,303 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:19,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 956332567, now seen corresponding path program 2 times [2024-06-03 18:36:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:19,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419994327] [2024-06-03 18:36:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:19,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:19,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419994327] [2024-06-03 18:36:19,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419994327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:19,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:19,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701788119] [2024-06-03 18:36:19,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:19,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:19,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:19,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:19,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 1214 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:19,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:19,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:19,519 INFO L124 PetriNetUnfolderBase]: 379/895 cut-off events. [2024-06-03 18:36:19,519 INFO L125 PetriNetUnfolderBase]: For 13571/13627 co-relation queries the response was YES. [2024-06-03 18:36:19,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4635 conditions, 895 events. 379/895 cut-off events. For 13571/13627 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5502 event pairs, 85 based on Foata normal form. 18/888 useless extension candidates. Maximal degree in co-relation 4059. Up to 261 conditions per place. [2024-06-03 18:36:19,527 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 71 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-06-03 18:36:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 126 transitions, 1585 flow [2024-06-03 18:36:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:36:19,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-06-03 18:36:19,528 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 1214 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:36:19,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 126 transitions, 1585 flow [2024-06-03 18:36:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 126 transitions, 1499 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:19,551 INFO L231 Difference]: Finished difference. Result has 125 places, 107 transitions, 1254 flow [2024-06-03 18:36:19,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1254, PETRI_PLACES=125, PETRI_TRANSITIONS=107} [2024-06-03 18:36:19,551 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 86 predicate places. [2024-06-03 18:36:19,551 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 107 transitions, 1254 flow [2024-06-03 18:36:19,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:19,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:36:19,552 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:19,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1515985425, now seen corresponding path program 3 times [2024-06-03 18:36:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750151683] [2024-06-03 18:36:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:19,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750151683] [2024-06-03 18:36:19,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750151683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:19,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:19,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:36:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231301949] [2024-06-03 18:36:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:19,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-03 18:36:19,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 107 transitions, 1254 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:19,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-03 18:36:19,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:19,783 INFO L124 PetriNetUnfolderBase]: 503/1121 cut-off events. [2024-06-03 18:36:19,784 INFO L125 PetriNetUnfolderBase]: For 12479/12503 co-relation queries the response was YES. [2024-06-03 18:36:19,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 1121 events. 503/1121 cut-off events. For 12479/12503 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7098 event pairs, 106 based on Foata normal form. 7/1071 useless extension candidates. Maximal degree in co-relation 5020. Up to 414 conditions per place. [2024-06-03 18:36:19,791 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 68 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-03 18:36:19,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 148 transitions, 1678 flow [2024-06-03 18:36:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:36:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:36:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 18:36:19,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888157894736842 [2024-06-03 18:36:19,794 INFO L175 Difference]: Start difference. First operand has 125 places, 107 transitions, 1254 flow. Second operand 8 states and 179 transitions. [2024-06-03 18:36:19,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 148 transitions, 1678 flow [2024-06-03 18:36:19,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 1620 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:19,819 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 1434 flow [2024-06-03 18:36:19,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2024-06-03 18:36:19,820 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2024-06-03 18:36:19,820 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 1434 flow [2024-06-03 18:36:19,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:19,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:19,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:36:19,821 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:19,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 975585973, now seen corresponding path program 4 times [2024-06-03 18:36:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:19,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816029359] [2024-06-03 18:36:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:19,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:19,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816029359] [2024-06-03 18:36:19,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816029359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:19,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:19,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:19,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763467210] [2024-06-03 18:36:19,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:19,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:19,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:19,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:19,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 1434 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:19,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:19,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:19,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:20,077 INFO L124 PetriNetUnfolderBase]: 423/1003 cut-off events. [2024-06-03 18:36:20,077 INFO L125 PetriNetUnfolderBase]: For 15134/15188 co-relation queries the response was YES. [2024-06-03 18:36:20,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5273 conditions, 1003 events. 423/1003 cut-off events. For 15134/15188 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6397 event pairs, 131 based on Foata normal form. 10/987 useless extension candidates. Maximal degree in co-relation 4875. Up to 339 conditions per place. [2024-06-03 18:36:20,085 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 70 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-03 18:36:20,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 135 transitions, 1717 flow [2024-06-03 18:36:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:36:20,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-03 18:36:20,086 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 1434 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:36:20,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 135 transitions, 1717 flow [2024-06-03 18:36:20,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 135 transitions, 1717 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 18:36:20,112 INFO L231 Difference]: Finished difference. Result has 141 places, 123 transitions, 1532 flow [2024-06-03 18:36:20,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1532, PETRI_PLACES=141, PETRI_TRANSITIONS=123} [2024-06-03 18:36:20,113 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 102 predicate places. [2024-06-03 18:36:20,113 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 123 transitions, 1532 flow [2024-06-03 18:36:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:20,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:20,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:36:20,114 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:20,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash -356997899, now seen corresponding path program 5 times [2024-06-03 18:36:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:20,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587686839] [2024-06-03 18:36:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:20,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:20,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:20,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587686839] [2024-06-03 18:36:20,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587686839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:20,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:20,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:36:20,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247550832] [2024-06-03 18:36:20,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:20,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:20,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:20,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-03 18:36:20,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 123 transitions, 1532 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:20,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-03 18:36:20,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:20,374 INFO L124 PetriNetUnfolderBase]: 436/1020 cut-off events. [2024-06-03 18:36:20,375 INFO L125 PetriNetUnfolderBase]: For 9602/9615 co-relation queries the response was YES. [2024-06-03 18:36:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 1020 events. 436/1020 cut-off events. For 9602/9615 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6424 event pairs, 112 based on Foata normal form. 27/1028 useless extension candidates. Maximal degree in co-relation 4303. Up to 245 conditions per place. [2024-06-03 18:36:20,382 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 71 selfloop transitions, 45 changer transitions 0/150 dead transitions. [2024-06-03 18:36:20,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 150 transitions, 1823 flow [2024-06-03 18:36:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:36:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:36:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-03 18:36:20,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2024-06-03 18:36:20,383 INFO L175 Difference]: Start difference. First operand has 141 places, 123 transitions, 1532 flow. Second operand 10 states and 208 transitions. [2024-06-03 18:36:20,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 150 transitions, 1823 flow [2024-06-03 18:36:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 150 transitions, 1711 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 18:36:20,412 INFO L231 Difference]: Finished difference. Result has 152 places, 124 transitions, 1557 flow [2024-06-03 18:36:20,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1557, PETRI_PLACES=152, PETRI_TRANSITIONS=124} [2024-06-03 18:36:20,413 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 113 predicate places. [2024-06-03 18:36:20,413 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 124 transitions, 1557 flow [2024-06-03 18:36:20,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:20,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:36:20,414 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 746207533, now seen corresponding path program 1 times [2024-06-03 18:36:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:20,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475631279] [2024-06-03 18:36:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:20,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:20,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475631279] [2024-06-03 18:36:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475631279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:20,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:20,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871150075] [2024-06-03 18:36:20,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:20,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:20,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:20,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 124 transitions, 1557 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:20,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:20,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:20,640 INFO L124 PetriNetUnfolderBase]: 362/931 cut-off events. [2024-06-03 18:36:20,640 INFO L125 PetriNetUnfolderBase]: For 13695/13735 co-relation queries the response was YES. [2024-06-03 18:36:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4926 conditions, 931 events. 362/931 cut-off events. For 13695/13735 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6120 event pairs, 122 based on Foata normal form. 14/930 useless extension candidates. Maximal degree in co-relation 4505. Up to 271 conditions per place. [2024-06-03 18:36:20,647 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 66 selfloop transitions, 33 changer transitions 0/137 dead transitions. [2024-06-03 18:36:20,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 137 transitions, 1853 flow [2024-06-03 18:36:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:36:20,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-03 18:36:20,649 INFO L175 Difference]: Start difference. First operand has 152 places, 124 transitions, 1557 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:36:20,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 137 transitions, 1853 flow [2024-06-03 18:36:20,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 137 transitions, 1796 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:20,679 INFO L231 Difference]: Finished difference. Result has 156 places, 127 transitions, 1608 flow [2024-06-03 18:36:20,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1608, PETRI_PLACES=156, PETRI_TRANSITIONS=127} [2024-06-03 18:36:20,680 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 117 predicate places. [2024-06-03 18:36:20,680 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 127 transitions, 1608 flow [2024-06-03 18:36:20,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:20,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:36:20,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:20,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash 955594087, now seen corresponding path program 2 times [2024-06-03 18:36:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:20,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195875274] [2024-06-03 18:36:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195875274] [2024-06-03 18:36:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195875274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:20,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:20,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:20,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634700076] [2024-06-03 18:36:20,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:20,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:20,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:20,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:20,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:20,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 127 transitions, 1608 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:20,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:20,886 INFO L124 PetriNetUnfolderBase]: 368/938 cut-off events. [2024-06-03 18:36:20,886 INFO L125 PetriNetUnfolderBase]: For 14679/14727 co-relation queries the response was YES. [2024-06-03 18:36:20,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5036 conditions, 938 events. 368/938 cut-off events. For 14679/14727 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6124 event pairs, 121 based on Foata normal form. 15/933 useless extension candidates. Maximal degree in co-relation 4627. Up to 272 conditions per place. [2024-06-03 18:36:20,894 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 61 selfloop transitions, 39 changer transitions 0/138 dead transitions. [2024-06-03 18:36:20,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 138 transitions, 1945 flow [2024-06-03 18:36:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-03 18:36:20,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745614035087719 [2024-06-03 18:36:20,896 INFO L175 Difference]: Start difference. First operand has 156 places, 127 transitions, 1608 flow. Second operand 6 states and 131 transitions. [2024-06-03 18:36:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 138 transitions, 1945 flow [2024-06-03 18:36:20,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 138 transitions, 1896 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:36:20,932 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1676 flow [2024-06-03 18:36:20,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1676, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-06-03 18:36:20,932 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 120 predicate places. [2024-06-03 18:36:20,933 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1676 flow [2024-06-03 18:36:20,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:20,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:20,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:36:20,933 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:20,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1814789151, now seen corresponding path program 3 times [2024-06-03 18:36:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:20,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63742464] [2024-06-03 18:36:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:20,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:20,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:20,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63742464] [2024-06-03 18:36:20,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63742464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:20,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:20,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:36:20,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156378825] [2024-06-03 18:36:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:20,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:20,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:20,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-03 18:36:20,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1676 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:20,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:20,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-03 18:36:20,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:21,180 INFO L124 PetriNetUnfolderBase]: 526/1175 cut-off events. [2024-06-03 18:36:21,181 INFO L125 PetriNetUnfolderBase]: For 12850/12879 co-relation queries the response was YES. [2024-06-03 18:36:21,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 1175 events. 526/1175 cut-off events. For 12850/12879 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7478 event pairs, 124 based on Foata normal form. 10/1159 useless extension candidates. Maximal degree in co-relation 5569. Up to 439 conditions per place. [2024-06-03 18:36:21,189 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 73 selfloop transitions, 51 changer transitions 0/170 dead transitions. [2024-06-03 18:36:21,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 170 transitions, 2137 flow [2024-06-03 18:36:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:36:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:36:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:36:21,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822368421052632 [2024-06-03 18:36:21,190 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1676 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:36:21,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 170 transitions, 2137 flow [2024-06-03 18:36:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 170 transitions, 2082 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:21,231 INFO L231 Difference]: Finished difference. Result has 170 places, 142 transitions, 1941 flow [2024-06-03 18:36:21,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1941, PETRI_PLACES=170, PETRI_TRANSITIONS=142} [2024-06-03 18:36:21,231 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 131 predicate places. [2024-06-03 18:36:21,231 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 142 transitions, 1941 flow [2024-06-03 18:36:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:21,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:21,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:36:21,232 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:21,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash 728752992, now seen corresponding path program 1 times [2024-06-03 18:36:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196636546] [2024-06-03 18:36:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:21,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196636546] [2024-06-03 18:36:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196636546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:21,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138764276] [2024-06-03 18:36:21,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:21,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:21,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:21,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 142 transitions, 1941 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:21,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:21,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:21,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:21,448 INFO L124 PetriNetUnfolderBase]: 387/980 cut-off events. [2024-06-03 18:36:21,448 INFO L125 PetriNetUnfolderBase]: For 18509/18559 co-relation queries the response was YES. [2024-06-03 18:36:21,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5760 conditions, 980 events. 387/980 cut-off events. For 18509/18559 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6527 event pairs, 90 based on Foata normal form. 8/965 useless extension candidates. Maximal degree in co-relation 5466. Up to 281 conditions per place. [2024-06-03 18:36:21,457 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 70 selfloop transitions, 41 changer transitions 0/159 dead transitions. [2024-06-03 18:36:21,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 159 transitions, 2300 flow [2024-06-03 18:36:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 18:36:21,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096491228070176 [2024-06-03 18:36:21,459 INFO L175 Difference]: Start difference. First operand has 170 places, 142 transitions, 1941 flow. Second operand 6 states and 139 transitions. [2024-06-03 18:36:21,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 159 transitions, 2300 flow [2024-06-03 18:36:21,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 159 transitions, 2266 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-03 18:36:21,508 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 2010 flow [2024-06-03 18:36:21,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2010, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-03 18:36:21,508 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 136 predicate places. [2024-06-03 18:36:21,509 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 2010 flow [2024-06-03 18:36:21,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:21,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:21,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:21,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:36:21,509 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:21,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash 14369211, now seen corresponding path program 4 times [2024-06-03 18:36:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:21,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953636124] [2024-06-03 18:36:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:21,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:21,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953636124] [2024-06-03 18:36:21,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953636124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:21,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396622209] [2024-06-03 18:36:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:21,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:21,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:21,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:21,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 2010 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:21,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:21,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:21,722 INFO L124 PetriNetUnfolderBase]: 403/1021 cut-off events. [2024-06-03 18:36:21,722 INFO L125 PetriNetUnfolderBase]: For 19824/19866 co-relation queries the response was YES. [2024-06-03 18:36:21,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 1021 events. 403/1021 cut-off events. For 19824/19866 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6839 event pairs, 123 based on Foata normal form. 11/1012 useless extension candidates. Maximal degree in co-relation 5582. Up to 288 conditions per place. [2024-06-03 18:36:21,732 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 73 selfloop transitions, 33 changer transitions 0/154 dead transitions. [2024-06-03 18:36:21,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 154 transitions, 2370 flow [2024-06-03 18:36:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:36:21,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-03 18:36:21,733 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 2010 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:36:21,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 154 transitions, 2370 flow [2024-06-03 18:36:21,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 154 transitions, 2307 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 18:36:21,789 INFO L231 Difference]: Finished difference. Result has 178 places, 146 transitions, 2055 flow [2024-06-03 18:36:21,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2055, PETRI_PLACES=178, PETRI_TRANSITIONS=146} [2024-06-03 18:36:21,790 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2024-06-03 18:36:21,790 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 146 transitions, 2055 flow [2024-06-03 18:36:21,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:21,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:21,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:21,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:36:21,790 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:21,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1332154496, now seen corresponding path program 2 times [2024-06-03 18:36:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:21,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144815481] [2024-06-03 18:36:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:21,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144815481] [2024-06-03 18:36:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144815481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:21,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:21,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115965427] [2024-06-03 18:36:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:21,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:21,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:21,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:21,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 146 transitions, 2055 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:21,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:21,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:21,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:22,070 INFO L124 PetriNetUnfolderBase]: 397/998 cut-off events. [2024-06-03 18:36:22,070 INFO L125 PetriNetUnfolderBase]: For 20997/21045 co-relation queries the response was YES. [2024-06-03 18:36:22,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6013 conditions, 998 events. 397/998 cut-off events. For 20997/21045 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6597 event pairs, 67 based on Foata normal form. 10/985 useless extension candidates. Maximal degree in co-relation 5608. Up to 291 conditions per place. [2024-06-03 18:36:22,079 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 69 selfloop transitions, 45 changer transitions 0/162 dead transitions. [2024-06-03 18:36:22,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 162 transitions, 2470 flow [2024-06-03 18:36:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 18:36:22,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-03 18:36:22,081 INFO L175 Difference]: Start difference. First operand has 178 places, 146 transitions, 2055 flow. Second operand 6 states and 136 transitions. [2024-06-03 18:36:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 162 transitions, 2470 flow [2024-06-03 18:36:22,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 162 transitions, 2409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 18:36:22,135 INFO L231 Difference]: Finished difference. Result has 181 places, 147 transitions, 2105 flow [2024-06-03 18:36:22,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2105, PETRI_PLACES=181, PETRI_TRANSITIONS=147} [2024-06-03 18:36:22,138 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 142 predicate places. [2024-06-03 18:36:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 147 transitions, 2105 flow [2024-06-03 18:36:22,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:22,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:22,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:36:22,139 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:22,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -191361824, now seen corresponding path program 3 times [2024-06-03 18:36:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:22,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108036970] [2024-06-03 18:36:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:22,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108036970] [2024-06-03 18:36:22,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108036970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:22,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:22,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724009723] [2024-06-03 18:36:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:22,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:22,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 147 transitions, 2105 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:22,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:22,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:22,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:22,398 INFO L124 PetriNetUnfolderBase]: 399/1006 cut-off events. [2024-06-03 18:36:22,399 INFO L125 PetriNetUnfolderBase]: For 22082/22134 co-relation queries the response was YES. [2024-06-03 18:36:22,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 1006 events. 399/1006 cut-off events. For 22082/22134 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6689 event pairs, 66 based on Foata normal form. 10/993 useless extension candidates. Maximal degree in co-relation 5671. Up to 292 conditions per place. [2024-06-03 18:36:22,407 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 71 selfloop transitions, 42 changer transitions 0/161 dead transitions. [2024-06-03 18:36:22,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 161 transitions, 2457 flow [2024-06-03 18:36:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 18:36:22,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2024-06-03 18:36:22,408 INFO L175 Difference]: Start difference. First operand has 181 places, 147 transitions, 2105 flow. Second operand 6 states and 135 transitions. [2024-06-03 18:36:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 161 transitions, 2457 flow [2024-06-03 18:36:22,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 161 transitions, 2347 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:22,460 INFO L231 Difference]: Finished difference. Result has 183 places, 147 transitions, 2083 flow [2024-06-03 18:36:22,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2083, PETRI_PLACES=183, PETRI_TRANSITIONS=147} [2024-06-03 18:36:22,462 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-06-03 18:36:22,462 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 147 transitions, 2083 flow [2024-06-03 18:36:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:22,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:22,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:36:22,463 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:22,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -191361669, now seen corresponding path program 5 times [2024-06-03 18:36:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021080162] [2024-06-03 18:36:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021080162] [2024-06-03 18:36:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021080162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541178870] [2024-06-03 18:36:22,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:22,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:22,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 147 transitions, 2083 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:22,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:22,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:22,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:22,723 INFO L124 PetriNetUnfolderBase]: 405/1033 cut-off events. [2024-06-03 18:36:22,723 INFO L125 PetriNetUnfolderBase]: For 22335/22373 co-relation queries the response was YES. [2024-06-03 18:36:22,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6144 conditions, 1033 events. 405/1033 cut-off events. For 22335/22373 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6968 event pairs, 113 based on Foata normal form. 17/1032 useless extension candidates. Maximal degree in co-relation 5666. Up to 287 conditions per place. [2024-06-03 18:36:22,730 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 75 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-03 18:36:22,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 2413 flow [2024-06-03 18:36:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 18:36:22,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-06-03 18:36:22,732 INFO L175 Difference]: Start difference. First operand has 183 places, 147 transitions, 2083 flow. Second operand 6 states and 127 transitions. [2024-06-03 18:36:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 2413 flow [2024-06-03 18:36:22,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 155 transitions, 2287 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 18:36:22,782 INFO L231 Difference]: Finished difference. Result has 183 places, 147 transitions, 2027 flow [2024-06-03 18:36:22,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2027, PETRI_PLACES=183, PETRI_TRANSITIONS=147} [2024-06-03 18:36:22,783 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-06-03 18:36:22,783 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 147 transitions, 2027 flow [2024-06-03 18:36:22,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:22,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:22,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:22,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:36:22,783 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:22,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -138712909, now seen corresponding path program 1 times [2024-06-03 18:36:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:22,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961165010] [2024-06-03 18:36:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:22,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:22,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:22,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961165010] [2024-06-03 18:36:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961165010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:22,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:22,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939427999] [2024-06-03 18:36:22,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:22,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:22,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:22,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 147 transitions, 2027 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:22,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:22,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:22,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:23,021 INFO L124 PetriNetUnfolderBase]: 404/1036 cut-off events. [2024-06-03 18:36:23,021 INFO L125 PetriNetUnfolderBase]: For 21427/21449 co-relation queries the response was YES. [2024-06-03 18:36:23,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6040 conditions, 1036 events. 404/1036 cut-off events. For 21427/21449 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6975 event pairs, 52 based on Foata normal form. 10/1034 useless extension candidates. Maximal degree in co-relation 5560. Up to 215 conditions per place. [2024-06-03 18:36:23,030 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 82 selfloop transitions, 25 changer transitions 6/161 dead transitions. [2024-06-03 18:36:23,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 161 transitions, 2387 flow [2024-06-03 18:36:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:36:23,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-03 18:36:23,031 INFO L175 Difference]: Start difference. First operand has 183 places, 147 transitions, 2027 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:36:23,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 161 transitions, 2387 flow [2024-06-03 18:36:23,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 161 transitions, 2270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:36:23,097 INFO L231 Difference]: Finished difference. Result has 182 places, 143 transitions, 1889 flow [2024-06-03 18:36:23,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1889, PETRI_PLACES=182, PETRI_TRANSITIONS=143} [2024-06-03 18:36:23,098 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 143 predicate places. [2024-06-03 18:36:23,098 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 143 transitions, 1889 flow [2024-06-03 18:36:23,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:23,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:36:23,098 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1649750197, now seen corresponding path program 2 times [2024-06-03 18:36:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313430705] [2024-06-03 18:36:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313430705] [2024-06-03 18:36:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313430705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:23,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880003542] [2024-06-03 18:36:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:23,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:23,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:23,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:23,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 143 transitions, 1889 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:23,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:23,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:23,330 INFO L124 PetriNetUnfolderBase]: 373/957 cut-off events. [2024-06-03 18:36:23,331 INFO L125 PetriNetUnfolderBase]: For 21003/21022 co-relation queries the response was YES. [2024-06-03 18:36:23,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5573 conditions, 957 events. 373/957 cut-off events. For 21003/21022 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6286 event pairs, 41 based on Foata normal form. 10/954 useless extension candidates. Maximal degree in co-relation 5103. Up to 201 conditions per place. [2024-06-03 18:36:23,338 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 81 selfloop transitions, 24 changer transitions 0/153 dead transitions. [2024-06-03 18:36:23,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 153 transitions, 2227 flow [2024-06-03 18:36:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:36:23,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-03 18:36:23,339 INFO L175 Difference]: Start difference. First operand has 182 places, 143 transitions, 1889 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:36:23,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 153 transitions, 2227 flow [2024-06-03 18:36:23,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 153 transitions, 2152 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:36:23,387 INFO L231 Difference]: Finished difference. Result has 178 places, 143 transitions, 1875 flow [2024-06-03 18:36:23,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1875, PETRI_PLACES=178, PETRI_TRANSITIONS=143} [2024-06-03 18:36:23,388 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2024-06-03 18:36:23,388 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 143 transitions, 1875 flow [2024-06-03 18:36:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:23,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:23,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:36:23,389 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:23,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash 176239031, now seen corresponding path program 3 times [2024-06-03 18:36:23,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:23,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552219080] [2024-06-03 18:36:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:23,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:23,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552219080] [2024-06-03 18:36:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552219080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120872495] [2024-06-03 18:36:23,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:23,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:23,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 143 transitions, 1875 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:23,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:23,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:23,591 INFO L124 PetriNetUnfolderBase]: 367/943 cut-off events. [2024-06-03 18:36:23,591 INFO L125 PetriNetUnfolderBase]: For 19124/19140 co-relation queries the response was YES. [2024-06-03 18:36:23,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5281 conditions, 943 events. 367/943 cut-off events. For 19124/19140 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6180 event pairs, 41 based on Foata normal form. 16/947 useless extension candidates. Maximal degree in co-relation 4874. Up to 199 conditions per place. [2024-06-03 18:36:23,599 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 58 selfloop transitions, 47 changer transitions 0/153 dead transitions. [2024-06-03 18:36:23,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 153 transitions, 2157 flow [2024-06-03 18:36:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:36:23,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 18:36:23,600 INFO L175 Difference]: Start difference. First operand has 178 places, 143 transitions, 1875 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:36:23,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 153 transitions, 2157 flow [2024-06-03 18:36:23,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 153 transitions, 2050 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:36:23,642 INFO L231 Difference]: Finished difference. Result has 176 places, 143 transitions, 1871 flow [2024-06-03 18:36:23,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1871, PETRI_PLACES=176, PETRI_TRANSITIONS=143} [2024-06-03 18:36:23,643 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2024-06-03 18:36:23,643 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 143 transitions, 1871 flow [2024-06-03 18:36:23,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:23,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:23,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:36:23,644 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:23,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -485946505, now seen corresponding path program 1 times [2024-06-03 18:36:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:23,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055035107] [2024-06-03 18:36:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055035107] [2024-06-03 18:36:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055035107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442101488] [2024-06-03 18:36:23,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:23,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:23,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 143 transitions, 1871 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:23,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:23,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:23,917 INFO L124 PetriNetUnfolderBase]: 377/982 cut-off events. [2024-06-03 18:36:23,918 INFO L125 PetriNetUnfolderBase]: For 20253/20268 co-relation queries the response was YES. [2024-06-03 18:36:23,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5397 conditions, 982 events. 377/982 cut-off events. For 20253/20268 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6621 event pairs, 79 based on Foata normal form. 16/987 useless extension candidates. Maximal degree in co-relation 5163. Up to 198 conditions per place. [2024-06-03 18:36:23,924 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 55 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-03 18:36:23,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 158 transitions, 2193 flow [2024-06-03 18:36:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 18:36:23,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-03 18:36:23,925 INFO L175 Difference]: Start difference. First operand has 176 places, 143 transitions, 1871 flow. Second operand 6 states and 136 transitions. [2024-06-03 18:36:23,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 158 transitions, 2193 flow [2024-06-03 18:36:23,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 158 transitions, 2098 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:36:23,973 INFO L231 Difference]: Finished difference. Result has 177 places, 144 transitions, 1913 flow [2024-06-03 18:36:23,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=177, PETRI_TRANSITIONS=144} [2024-06-03 18:36:23,974 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 138 predicate places. [2024-06-03 18:36:23,974 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 144 transitions, 1913 flow [2024-06-03 18:36:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:23,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:23,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:23,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:36:23,975 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:23,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1493352477, now seen corresponding path program 2 times [2024-06-03 18:36:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:23,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601642583] [2024-06-03 18:36:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:24,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601642583] [2024-06-03 18:36:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601642583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666552445] [2024-06-03 18:36:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:24,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:24,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:24,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 144 transitions, 1913 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:24,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:24,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:24,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:24,190 INFO L124 PetriNetUnfolderBase]: 398/1049 cut-off events. [2024-06-03 18:36:24,190 INFO L125 PetriNetUnfolderBase]: For 22268/22288 co-relation queries the response was YES. [2024-06-03 18:36:24,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5761 conditions, 1049 events. 398/1049 cut-off events. For 22268/22288 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7287 event pairs, 77 based on Foata normal form. 16/1050 useless extension candidates. Maximal degree in co-relation 5521. Up to 279 conditions per place. [2024-06-03 18:36:24,199 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 84 selfloop transitions, 27 changer transitions 0/159 dead transitions. [2024-06-03 18:36:24,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 159 transitions, 2303 flow [2024-06-03 18:36:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:36:24,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 18:36:24,200 INFO L175 Difference]: Start difference. First operand has 177 places, 144 transitions, 1913 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:36:24,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 159 transitions, 2303 flow [2024-06-03 18:36:24,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 159 transitions, 2196 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:36:24,258 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 1904 flow [2024-06-03 18:36:24,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1904, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-03 18:36:24,259 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 141 predicate places. [2024-06-03 18:36:24,259 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 1904 flow [2024-06-03 18:36:24,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:24,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:24,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:24,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:36:24,259 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:24,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -497747477, now seen corresponding path program 3 times [2024-06-03 18:36:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:24,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950560448] [2024-06-03 18:36:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950560448] [2024-06-03 18:36:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950560448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:24,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:24,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439439070] [2024-06-03 18:36:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:24,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:24,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:24,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:24,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:24,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:24,487 INFO L124 PetriNetUnfolderBase]: 390/1031 cut-off events. [2024-06-03 18:36:24,487 INFO L125 PetriNetUnfolderBase]: For 19409/19432 co-relation queries the response was YES. [2024-06-03 18:36:24,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5612 conditions, 1031 events. 390/1031 cut-off events. For 19409/19432 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7132 event pairs, 77 based on Foata normal form. 10/1028 useless extension candidates. Maximal degree in co-relation 5373. Up to 276 conditions per place. [2024-06-03 18:36:24,525 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 76 selfloop transitions, 33 changer transitions 0/157 dead transitions. [2024-06-03 18:36:24,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 157 transitions, 2204 flow [2024-06-03 18:36:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:36:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-03 18:36:24,527 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 1904 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:36:24,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 157 transitions, 2204 flow [2024-06-03 18:36:24,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 157 transitions, 2154 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:36:24,581 INFO L231 Difference]: Finished difference. Result has 183 places, 146 transitions, 1924 flow [2024-06-03 18:36:24,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1924, PETRI_PLACES=183, PETRI_TRANSITIONS=146} [2024-06-03 18:36:24,581 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2024-06-03 18:36:24,582 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 146 transitions, 1924 flow [2024-06-03 18:36:24,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:24,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:24,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:24,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:36:24,582 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:24,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1640044167, now seen corresponding path program 4 times [2024-06-03 18:36:24,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57761153] [2024-06-03 18:36:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:24,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:24,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57761153] [2024-06-03 18:36:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57761153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616379624] [2024-06-03 18:36:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:24,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:24,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 146 transitions, 1924 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:24,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:24,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:24,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:24,828 INFO L124 PetriNetUnfolderBase]: 395/1048 cut-off events. [2024-06-03 18:36:24,828 INFO L125 PetriNetUnfolderBase]: For 20483/20509 co-relation queries the response was YES. [2024-06-03 18:36:24,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5730 conditions, 1048 events. 395/1048 cut-off events. For 20483/20509 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7254 event pairs, 95 based on Foata normal form. 10/1040 useless extension candidates. Maximal degree in co-relation 5330. Up to 328 conditions per place. [2024-06-03 18:36:24,838 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 79 selfloop transitions, 31 changer transitions 0/158 dead transitions. [2024-06-03 18:36:24,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 158 transitions, 2300 flow [2024-06-03 18:36:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-03 18:36:24,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-06-03 18:36:24,840 INFO L175 Difference]: Start difference. First operand has 183 places, 146 transitions, 1924 flow. Second operand 6 states and 128 transitions. [2024-06-03 18:36:24,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 158 transitions, 2300 flow [2024-06-03 18:36:24,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 158 transitions, 2230 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:36:24,902 INFO L231 Difference]: Finished difference. Result has 184 places, 147 transitions, 1934 flow [2024-06-03 18:36:24,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1934, PETRI_PLACES=184, PETRI_TRANSITIONS=147} [2024-06-03 18:36:24,903 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 145 predicate places. [2024-06-03 18:36:24,903 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 147 transitions, 1934 flow [2024-06-03 18:36:24,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:24,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:24,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:24,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:36:24,903 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:24,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1637247657, now seen corresponding path program 5 times [2024-06-03 18:36:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:24,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589364209] [2024-06-03 18:36:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:24,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:24,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589364209] [2024-06-03 18:36:24,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589364209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:24,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:24,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449082606] [2024-06-03 18:36:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:24,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:25,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 147 transitions, 1934 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:25,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:25,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:25,143 INFO L124 PetriNetUnfolderBase]: 397/1056 cut-off events. [2024-06-03 18:36:25,143 INFO L125 PetriNetUnfolderBase]: For 20221/20245 co-relation queries the response was YES. [2024-06-03 18:36:25,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1056 events. 397/1056 cut-off events. For 20221/20245 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7369 event pairs, 95 based on Foata normal form. 8/1048 useless extension candidates. Maximal degree in co-relation 5329. Up to 327 conditions per place. [2024-06-03 18:36:25,151 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 91 selfloop transitions, 19 changer transitions 0/158 dead transitions. [2024-06-03 18:36:25,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 158 transitions, 2300 flow [2024-06-03 18:36:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:36:25,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-06-03 18:36:25,152 INFO L175 Difference]: Start difference. First operand has 184 places, 147 transitions, 1934 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:36:25,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 158 transitions, 2300 flow [2024-06-03 18:36:25,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 158 transitions, 2237 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:36:25,211 INFO L231 Difference]: Finished difference. Result has 185 places, 147 transitions, 1913 flow [2024-06-03 18:36:25,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=185, PETRI_TRANSITIONS=147} [2024-06-03 18:36:25,212 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 146 predicate places. [2024-06-03 18:36:25,212 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 147 transitions, 1913 flow [2024-06-03 18:36:25,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:25,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:25,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:36:25,213 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:25,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1637243007, now seen corresponding path program 6 times [2024-06-03 18:36:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445860678] [2024-06-03 18:36:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:25,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:25,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445860678] [2024-06-03 18:36:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445860678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:25,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:25,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956256835] [2024-06-03 18:36:25,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:25,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:25,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:25,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 147 transitions, 1913 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:25,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:25,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:25,415 INFO L124 PetriNetUnfolderBase]: 391/1042 cut-off events. [2024-06-03 18:36:25,415 INFO L125 PetriNetUnfolderBase]: For 19910/19928 co-relation queries the response was YES. [2024-06-03 18:36:25,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1042 events. 391/1042 cut-off events. For 19910/19928 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7236 event pairs, 91 based on Foata normal form. 14/1041 useless extension candidates. Maximal degree in co-relation 5015. Up to 325 conditions per place. [2024-06-03 18:36:25,423 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 89 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-03 18:36:25,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 157 transitions, 2215 flow [2024-06-03 18:36:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-03 18:36:25,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-06-03 18:36:25,447 INFO L175 Difference]: Start difference. First operand has 185 places, 147 transitions, 1913 flow. Second operand 6 states and 128 transitions. [2024-06-03 18:36:25,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 157 transitions, 2215 flow [2024-06-03 18:36:25,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 157 transitions, 2138 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:36:25,495 INFO L231 Difference]: Finished difference. Result has 185 places, 147 transitions, 1882 flow [2024-06-03 18:36:25,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1882, PETRI_PLACES=185, PETRI_TRANSITIONS=147} [2024-06-03 18:36:25,496 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 146 predicate places. [2024-06-03 18:36:25,496 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 147 transitions, 1882 flow [2024-06-03 18:36:25,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:25,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:36:25,497 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:25,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2012710222, now seen corresponding path program 1 times [2024-06-03 18:36:25,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616132800] [2024-06-03 18:36:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:25,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616132800] [2024-06-03 18:36:25,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616132800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:25,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:25,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:25,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035063411] [2024-06-03 18:36:25,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:25,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:25,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:25,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:25,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 147 transitions, 1882 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:25,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:25,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:25,708 INFO L124 PetriNetUnfolderBase]: 382/1030 cut-off events. [2024-06-03 18:36:25,709 INFO L125 PetriNetUnfolderBase]: For 16001/16016 co-relation queries the response was YES. [2024-06-03 18:36:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5213 conditions, 1030 events. 382/1030 cut-off events. For 16001/16016 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7219 event pairs, 107 based on Foata normal form. 2/1016 useless extension candidates. Maximal degree in co-relation 4816. Up to 294 conditions per place. [2024-06-03 18:36:25,717 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 70 selfloop transitions, 27 changer transitions 10/155 dead transitions. [2024-06-03 18:36:25,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 155 transitions, 2178 flow [2024-06-03 18:36:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 18:36:25,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-06-03 18:36:25,718 INFO L175 Difference]: Start difference. First operand has 185 places, 147 transitions, 1882 flow. Second operand 6 states and 127 transitions. [2024-06-03 18:36:25,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 155 transitions, 2178 flow [2024-06-03 18:36:25,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 155 transitions, 2136 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:36:25,765 INFO L231 Difference]: Finished difference. Result has 186 places, 141 transitions, 1814 flow [2024-06-03 18:36:25,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1814, PETRI_PLACES=186, PETRI_TRANSITIONS=141} [2024-06-03 18:36:25,766 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 147 predicate places. [2024-06-03 18:36:25,766 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 141 transitions, 1814 flow [2024-06-03 18:36:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:25,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:25,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:36:25,766 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:25,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1541714512, now seen corresponding path program 2 times [2024-06-03 18:36:25,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:25,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142508178] [2024-06-03 18:36:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:25,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142508178] [2024-06-03 18:36:25,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142508178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:25,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:25,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:25,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296157343] [2024-06-03 18:36:25,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:25,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:25,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:25,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:25,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 141 transitions, 1814 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:25,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:25,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:25,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:25,985 INFO L124 PetriNetUnfolderBase]: 351/957 cut-off events. [2024-06-03 18:36:25,985 INFO L125 PetriNetUnfolderBase]: For 15090/15105 co-relation queries the response was YES. [2024-06-03 18:36:25,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 957 events. 351/957 cut-off events. For 15090/15105 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6618 event pairs, 102 based on Foata normal form. 2/943 useless extension candidates. Maximal degree in co-relation 4508. Up to 276 conditions per place. [2024-06-03 18:36:25,994 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 44 selfloop transitions, 55 changer transitions 0/147 dead transitions. [2024-06-03 18:36:25,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 147 transitions, 2024 flow [2024-06-03 18:36:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 18:36:25,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-06-03 18:36:25,995 INFO L175 Difference]: Start difference. First operand has 186 places, 141 transitions, 1814 flow. Second operand 6 states and 127 transitions. [2024-06-03 18:36:25,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 147 transitions, 2024 flow [2024-06-03 18:36:26,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 147 transitions, 1910 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 18:36:26,039 INFO L231 Difference]: Finished difference. Result has 177 places, 141 transitions, 1814 flow [2024-06-03 18:36:26,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1814, PETRI_PLACES=177, PETRI_TRANSITIONS=141} [2024-06-03 18:36:26,040 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 138 predicate places. [2024-06-03 18:36:26,040 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 141 transitions, 1814 flow [2024-06-03 18:36:26,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:26,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:26,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:36:26,040 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -596132417, now seen corresponding path program 1 times [2024-06-03 18:36:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774465180] [2024-06-03 18:36:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:26,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:26,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774465180] [2024-06-03 18:36:26,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774465180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:26,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:26,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:26,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711494738] [2024-06-03 18:36:26,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:26,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:26,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:26,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:26,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:26,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 141 transitions, 1814 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:26,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:26,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:26,252 INFO L124 PetriNetUnfolderBase]: 352/951 cut-off events. [2024-06-03 18:36:26,253 INFO L125 PetriNetUnfolderBase]: For 12686/12699 co-relation queries the response was YES. [2024-06-03 18:36:26,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 951 events. 352/951 cut-off events. For 12686/12699 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6486 event pairs, 50 based on Foata normal form. 2/943 useless extension candidates. Maximal degree in co-relation 4557. Up to 135 conditions per place. [2024-06-03 18:36:26,260 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 49 selfloop transitions, 59 changer transitions 0/156 dead transitions. [2024-06-03 18:36:26,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 156 transitions, 2126 flow [2024-06-03 18:36:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:36:26,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2024-06-03 18:36:26,261 INFO L175 Difference]: Start difference. First operand has 177 places, 141 transitions, 1814 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:36:26,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 156 transitions, 2126 flow [2024-06-03 18:36:26,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 156 transitions, 1999 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:36:26,300 INFO L231 Difference]: Finished difference. Result has 176 places, 141 transitions, 1811 flow [2024-06-03 18:36:26,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1811, PETRI_PLACES=176, PETRI_TRANSITIONS=141} [2024-06-03 18:36:26,301 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2024-06-03 18:36:26,301 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 141 transitions, 1811 flow [2024-06-03 18:36:26,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:26,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:26,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:36:26,302 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:26,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash 236410679, now seen corresponding path program 2 times [2024-06-03 18:36:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22566856] [2024-06-03 18:36:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:26,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:26,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22566856] [2024-06-03 18:36:26,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22566856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:26,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:26,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:26,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440580524] [2024-06-03 18:36:26,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:26,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:26,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:26,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:26,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 141 transitions, 1811 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:26,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:26,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:26,521 INFO L124 PetriNetUnfolderBase]: 361/972 cut-off events. [2024-06-03 18:36:26,521 INFO L125 PetriNetUnfolderBase]: For 13337/13352 co-relation queries the response was YES. [2024-06-03 18:36:26,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4896 conditions, 972 events. 361/972 cut-off events. For 13337/13352 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6698 event pairs, 53 based on Foata normal form. 2/964 useless extension candidates. Maximal degree in co-relation 4659. Up to 215 conditions per place. [2024-06-03 18:36:26,529 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 69 selfloop transitions, 26 changer transitions 11/154 dead transitions. [2024-06-03 18:36:26,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 154 transitions, 2129 flow [2024-06-03 18:36:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-03 18:36:26,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745614035087719 [2024-06-03 18:36:26,530 INFO L175 Difference]: Start difference. First operand has 176 places, 141 transitions, 1811 flow. Second operand 6 states and 131 transitions. [2024-06-03 18:36:26,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 154 transitions, 2129 flow [2024-06-03 18:36:26,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 154 transitions, 1949 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:36:26,574 INFO L231 Difference]: Finished difference. Result has 174 places, 135 transitions, 1624 flow [2024-06-03 18:36:26,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1624, PETRI_PLACES=174, PETRI_TRANSITIONS=135} [2024-06-03 18:36:26,575 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 135 predicate places. [2024-06-03 18:36:26,576 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 135 transitions, 1624 flow [2024-06-03 18:36:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:26,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:26,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:36:26,576 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:26,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1403645461, now seen corresponding path program 3 times [2024-06-03 18:36:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:26,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342965607] [2024-06-03 18:36:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:26,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342965607] [2024-06-03 18:36:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342965607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:26,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170563212] [2024-06-03 18:36:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:26,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:26,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 135 transitions, 1624 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:26,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:26,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:26,806 INFO L124 PetriNetUnfolderBase]: 320/874 cut-off events. [2024-06-03 18:36:26,807 INFO L125 PetriNetUnfolderBase]: For 11154/11167 co-relation queries the response was YES. [2024-06-03 18:36:26,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 874 events. 320/874 cut-off events. For 11154/11167 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5928 event pairs, 62 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 3979. Up to 211 conditions per place. [2024-06-03 18:36:26,813 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 74 selfloop transitions, 22 changer transitions 8/152 dead transitions. [2024-06-03 18:36:26,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 152 transitions, 1872 flow [2024-06-03 18:36:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 18:36:26,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-03 18:36:26,814 INFO L175 Difference]: Start difference. First operand has 174 places, 135 transitions, 1624 flow. Second operand 6 states and 136 transitions. [2024-06-03 18:36:26,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 152 transitions, 1872 flow [2024-06-03 18:36:26,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 152 transitions, 1810 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:36:26,844 INFO L231 Difference]: Finished difference. Result has 166 places, 130 transitions, 1553 flow [2024-06-03 18:36:26,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1553, PETRI_PLACES=166, PETRI_TRANSITIONS=130} [2024-06-03 18:36:26,844 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 127 predicate places. [2024-06-03 18:36:26,844 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 130 transitions, 1553 flow [2024-06-03 18:36:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:26,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:26,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:36:26,845 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:26,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1479050676, now seen corresponding path program 1 times [2024-06-03 18:36:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:26,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772015342] [2024-06-03 18:36:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:26,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:26,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772015342] [2024-06-03 18:36:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772015342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:26,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:26,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:26,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110468255] [2024-06-03 18:36:26,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:26,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:26,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:26,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:26,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 130 transitions, 1553 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:26,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:26,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:26,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:27,017 INFO L124 PetriNetUnfolderBase]: 291/790 cut-off events. [2024-06-03 18:36:27,017 INFO L125 PetriNetUnfolderBase]: For 8794/8807 co-relation queries the response was YES. [2024-06-03 18:36:27,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 790 events. 291/790 cut-off events. For 8794/8807 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5182 event pairs, 22 based on Foata normal form. 4/784 useless extension candidates. Maximal degree in co-relation 3578. Up to 213 conditions per place. [2024-06-03 18:36:27,023 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 40 selfloop transitions, 18 changer transitions 55/144 dead transitions. [2024-06-03 18:36:27,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 144 transitions, 1777 flow [2024-06-03 18:36:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:36:27,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-06-03 18:36:27,024 INFO L175 Difference]: Start difference. First operand has 166 places, 130 transitions, 1553 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:36:27,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 144 transitions, 1777 flow [2024-06-03 18:36:27,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 144 transitions, 1713 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 18:36:27,048 INFO L231 Difference]: Finished difference. Result has 156 places, 83 transitions, 896 flow [2024-06-03 18:36:27,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=156, PETRI_TRANSITIONS=83} [2024-06-03 18:36:27,049 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 117 predicate places. [2024-06-03 18:36:27,049 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 83 transitions, 896 flow [2024-06-03 18:36:27,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:27,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:27,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:27,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:36:27,049 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:36:27,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash -567285620, now seen corresponding path program 2 times [2024-06-03 18:36:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:27,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017309939] [2024-06-03 18:36:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017309939] [2024-06-03 18:36:27,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017309939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:27,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:27,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:36:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362177887] [2024-06-03 18:36:27,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:27,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:36:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:36:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:36:27,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-06-03 18:36:27,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 83 transitions, 896 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:27,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:27,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-06-03 18:36:27,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:27,209 INFO L124 PetriNetUnfolderBase]: 161/449 cut-off events. [2024-06-03 18:36:27,209 INFO L125 PetriNetUnfolderBase]: For 4365/4377 co-relation queries the response was YES. [2024-06-03 18:36:27,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 449 events. 161/449 cut-off events. For 4365/4377 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2528 event pairs, 18 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 1955. Up to 80 conditions per place. [2024-06-03 18:36:27,211 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 0 selfloop transitions, 0 changer transitions 88/88 dead transitions. [2024-06-03 18:36:27,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 88 transitions, 970 flow [2024-06-03 18:36:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:36:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:36:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 18:36:27,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2024-06-03 18:36:27,212 INFO L175 Difference]: Start difference. First operand has 156 places, 83 transitions, 896 flow. Second operand 6 states and 116 transitions. [2024-06-03 18:36:27,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 88 transitions, 970 flow [2024-06-03 18:36:27,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 88 transitions, 687 flow, removed 11 selfloop flow, removed 46 redundant places. [2024-06-03 18:36:27,218 INFO L231 Difference]: Finished difference. Result has 99 places, 0 transitions, 0 flow [2024-06-03 18:36:27,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=99, PETRI_TRANSITIONS=0} [2024-06-03 18:36:27,219 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 60 predicate places. [2024-06-03 18:36:27,219 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 0 transitions, 0 flow [2024-06-03 18:36:27,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:36:27,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 18:36:27,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 18:36:27,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 18:36:27,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 18:36:27,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:36:27,222 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:27,225 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 18:36:27,225 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 18:36:27,230 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 18:36:27,230 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 18:36:27,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 06:36:27 BasicIcfg [2024-06-03 18:36:27,231 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 18:36:27,231 INFO L158 Benchmark]: Toolchain (without parser) took 13610.68ms. Allocated memory was 167.8MB in the beginning and 643.8MB in the end (delta: 476.1MB). Free memory was 134.6MB in the beginning and 234.3MB in the end (delta: -99.7MB). Peak memory consumption was 376.6MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,231 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:27,231 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory was 98.0MB in the beginning and 97.9MB in the end (delta: 72.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:27,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 464.73ms. Allocated memory is still 167.8MB. Free memory was 134.6MB in the beginning and 109.5MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,232 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.90ms. Allocated memory is still 167.8MB. Free memory was 108.9MB in the beginning and 107.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,232 INFO L158 Benchmark]: Boogie Preprocessor took 59.96ms. Allocated memory is still 167.8MB. Free memory was 106.8MB in the beginning and 104.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,232 INFO L158 Benchmark]: RCFGBuilder took 373.79ms. Allocated memory is still 167.8MB. Free memory was 104.7MB in the beginning and 84.4MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,235 INFO L158 Benchmark]: TraceAbstraction took 12649.57ms. Allocated memory was 167.8MB in the beginning and 643.8MB in the end (delta: 476.1MB). Free memory was 83.7MB in the beginning and 234.3MB in the end (delta: -150.6MB). Peak memory consumption was 326.3MB. Max. memory is 16.1GB. [2024-06-03 18:36:27,236 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory was 98.0MB in the beginning and 97.9MB in the end (delta: 72.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 464.73ms. Allocated memory is still 167.8MB. Free memory was 134.6MB in the beginning and 109.5MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.90ms. Allocated memory is still 167.8MB. Free memory was 108.9MB in the beginning and 107.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.96ms. Allocated memory is still 167.8MB. Free memory was 106.8MB in the beginning and 104.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 373.79ms. Allocated memory is still 167.8MB. Free memory was 104.7MB in the beginning and 84.4MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 12649.57ms. Allocated memory was 167.8MB in the beginning and 643.8MB in the end (delta: 476.1MB). Free memory was 83.7MB in the beginning and 234.3MB in the end (delta: -150.6MB). Peak memory consumption was 326.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 763]: 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, 61 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: 12.5s, OverallIterations: 46, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3565 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2516 mSDsluCounter, 1377 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 965 mSDsCounter, 227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6043 IncrementalHoareTripleChecker+Invalid, 6270 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 227 mSolverCounterUnsat, 412 mSDtfsCounter, 6043 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2105occurred in iteration=28, InterpolantAutomatonStates: 278, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 788 NumberOfCodeBlocks, 788 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 742 ConstructedInterpolants, 0 QuantifiedInterpolants, 3022 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 46 InterpolantComputations, 46 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 18:36:27,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE