./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe010_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe010_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:45:13,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:45:13,975 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:45:13,991 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:45:13,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:45:14,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:45:14,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:45:14,011 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:45:14,011 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:45:14,012 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:45:14,012 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:45:14,012 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:45:14,013 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:45:14,013 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:45:14,013 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:45:14,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:45:14,014 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:45:14,014 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:45:14,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:45:14,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:45:14,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:45:14,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:45:14,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:45:14,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:45:14,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:45:14,029 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:45:14,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:45:14,030 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:45:14,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:45:14,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:45:14,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:45:14,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:45:14,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:45:14,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:45:14,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:45:14,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:45:14,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:45:14,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:45:14,037 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:45:14,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:45:14,038 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:45:14,038 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:45:14,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:45:14,038 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:45:14,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:45:14,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:45:14,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:45:14,275 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:45:14,275 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:45:14,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-21 15:45:15,303 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:45:15,495 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:45:15,496 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-21 15:45:15,506 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5368ed4f/21eebbc3284f4942b307cf7804968bc7/FLAGb15cd4a26 [2024-06-21 15:45:15,516 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5368ed4f/21eebbc3284f4942b307cf7804968bc7 [2024-06-21 15:45:15,518 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:45:15,519 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:45:15,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe010_tso.yml/witness.yml [2024-06-21 15:45:15,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:45:15,579 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:45:15,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:45:15,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:45:15,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:45:15,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:45:15" (1/2) ... [2024-06-21 15:45:15,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7acedbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:45:15, skipping insertion in model container [2024-06-21 15:45:15,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:45:15" (1/2) ... [2024-06-21 15:45:15,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@115827b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:45:15, skipping insertion in model container [2024-06-21 15:45:15,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:45:15" (2/2) ... [2024-06-21 15:45:15,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7acedbce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:15, skipping insertion in model container [2024-06-21 15:45:15,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:45:15" (2/2) ... [2024-06-21 15:45:15,592 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:45:15,614 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:45:15,616 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] (((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 15:45:15,616 INFO L97 edCorrectnessWitness]: Location invariant before [L761-L761] (((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 15:45:15,616 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:45:15,617 INFO L106 edCorrectnessWitness]: ghost_update [L759-L759] multithreaded = 1; [2024-06-21 15:45:15,656 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:45:15,903 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:45:15,919 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:45:15,996 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:45:16,023 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:45:16,024 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16 WrapperNode [2024-06-21 15:45:16,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:45:16,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:45:16,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:45:16,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:45:16,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,077 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2024-06-21 15:45:16,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:45:16,079 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:45:16,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:45:16,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:45:16,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,099 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,116 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:45:16,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:45:16,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:45:16,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:45:16,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:45:16,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (1/1) ... [2024-06-21 15:45:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:45:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:45:16,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:45:16,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:45:16,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:45:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:45:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:45:16,209 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:45:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:45:16,209 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:45:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:45:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:45:16,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:45:16,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:45:16,211 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:45:16,305 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:45:16,307 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:45:16,437 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:45:16,437 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:45:16,533 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:45:16,541 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:45:16,541 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:45:16 BoogieIcfgContainer [2024-06-21 15:45:16,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:45:16,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:45:16,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:45:16,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:45:16,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:45:15" (1/4) ... [2024-06-21 15:45:16,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcaca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:45:16, skipping insertion in model container [2024-06-21 15:45:16,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:45:15" (2/4) ... [2024-06-21 15:45:16,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcaca2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:45:16, skipping insertion in model container [2024-06-21 15:45:16,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:45:16" (3/4) ... [2024-06-21 15:45:16,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcaca2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:45:16, skipping insertion in model container [2024-06-21 15:45:16,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:45:16" (4/4) ... [2024-06-21 15:45:16,551 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_tso.i [2024-06-21 15:45:16,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:45:16,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 15:45:16,570 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:45:16,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:45:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 15:45:16,672 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 15:45:16,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:45:16,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:45:16,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 15:45:16,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 15:45:16,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:45:16,691 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;@290d7931, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:45:16,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 15:45:16,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:45:16,700 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:45:16,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:45:16,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:16,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:45:16,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:16,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:16,705 INFO L85 PathProgramCache]: Analyzing trace with hash 186759909, now seen corresponding path program 1 times [2024-06-21 15:45:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471460368] [2024-06-21 15:45:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:17,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:17,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471460368] [2024-06-21 15:45:17,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471460368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:17,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:17,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:45:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503917793] [2024-06-21 15:45:17,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:45:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:45:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:45:17,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-06-21 15:45:17,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:17,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-06-21 15:45:17,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:17,169 INFO L124 PetriNetUnfolderBase]: 87/183 cut-off events. [2024-06-21 15:45:17,170 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 15:45:17,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 183 events. 87/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 672 event pairs, 47 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 354. Up to 161 conditions per place. [2024-06-21 15:45:17,174 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 18 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 15:45:17,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 105 flow [2024-06-21 15:45:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:45:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:45:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-06-21 15:45:17,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-06-21 15:45:17,185 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 59 transitions. [2024-06-21 15:45:17,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 105 flow [2024-06-21 15:45:17,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 15:45:17,188 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 15:45:17,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-21 15:45:17,192 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 15:45:17,192 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 15:45:17,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:17,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:17,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:45:17,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:17,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -912341756, now seen corresponding path program 1 times [2024-06-21 15:45:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967892922] [2024-06-21 15:45:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967892922] [2024-06-21 15:45:17,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967892922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:17,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:17,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:45:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668759793] [2024-06-21 15:45:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:45:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:45:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:45:17,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-06-21 15:45:17,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:17,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-06-21 15:45:17,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:17,380 INFO L124 PetriNetUnfolderBase]: 88/185 cut-off events. [2024-06-21 15:45:17,381 INFO L125 PetriNetUnfolderBase]: For 36/39 co-relation queries the response was YES. [2024-06-21 15:45:17,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 185 events. 88/185 cut-off events. For 36/39 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 668 event pairs, 35 based on Foata normal form. 5/186 useless extension candidates. Maximal degree in co-relation 413. Up to 142 conditions per place. [2024-06-21 15:45:17,383 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 24 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-21 15:45:17,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 171 flow [2024-06-21 15:45:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:45:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:45:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-06-21 15:45:17,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6982758620689655 [2024-06-21 15:45:17,386 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 81 transitions. [2024-06-21 15:45:17,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 171 flow [2024-06-21 15:45:17,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:45:17,391 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 119 flow [2024-06-21 15:45:17,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-06-21 15:45:17,392 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-21 15:45:17,392 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 119 flow [2024-06-21 15:45:17,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:17,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:17,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:45:17,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:17,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1782177076, now seen corresponding path program 1 times [2024-06-21 15:45:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:17,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584528731] [2024-06-21 15:45:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:17,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:17,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584528731] [2024-06-21 15:45:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584528731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:17,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:17,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:45:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962613292] [2024-06-21 15:45:17,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:45:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:45:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:45:17,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:17,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:17,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:17,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:17,557 INFO L124 PetriNetUnfolderBase]: 103/215 cut-off events. [2024-06-21 15:45:17,558 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-06-21 15:45:17,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 215 events. 103/215 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 770 event pairs, 29 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 585. Up to 171 conditions per place. [2024-06-21 15:45:17,562 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-06-21 15:45:17,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 254 flow [2024-06-21 15:45:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:45:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:45:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 15:45:17,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-06-21 15:45:17,567 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 119 flow. Second operand 5 states and 91 transitions. [2024-06-21 15:45:17,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 254 flow [2024-06-21 15:45:17,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 252 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:45:17,571 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 173 flow [2024-06-21 15:45:17,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-06-21 15:45:17,572 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-06-21 15:45:17,572 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 173 flow [2024-06-21 15:45:17,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:17,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:45:17,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:17,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1019765965, now seen corresponding path program 1 times [2024-06-21 15:45:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062881282] [2024-06-21 15:45:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:17,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:17,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062881282] [2024-06-21 15:45:17,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062881282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:17,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:17,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:17,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712560893] [2024-06-21 15:45:17,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:17,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:17,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:17,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:17,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:17,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:17,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:17,806 INFO L124 PetriNetUnfolderBase]: 99/207 cut-off events. [2024-06-21 15:45:17,808 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-06-21 15:45:17,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 207 events. 99/207 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 730 event pairs, 13 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 642. Up to 145 conditions per place. [2024-06-21 15:45:17,811 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-21 15:45:17,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 285 flow [2024-06-21 15:45:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 15:45:17,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2024-06-21 15:45:17,814 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 173 flow. Second operand 6 states and 103 transitions. [2024-06-21 15:45:17,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 285 flow [2024-06-21 15:45:17,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 285 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 15:45:17,819 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 185 flow [2024-06-21 15:45:17,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-06-21 15:45:17,821 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-21 15:45:17,821 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 185 flow [2024-06-21 15:45:17,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:17,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:17,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:45:17,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:17,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2113222050, now seen corresponding path program 1 times [2024-06-21 15:45:17,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:17,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024060272] [2024-06-21 15:45:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:17,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:17,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024060272] [2024-06-21 15:45:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024060272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:45:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988313433] [2024-06-21 15:45:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:45:17,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:45:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:45:17,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:17,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:17,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:17,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,023 INFO L124 PetriNetUnfolderBase]: 94/197 cut-off events. [2024-06-21 15:45:18,023 INFO L125 PetriNetUnfolderBase]: For 405/408 co-relation queries the response was YES. [2024-06-21 15:45:18,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 197 events. 94/197 cut-off events. For 405/408 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 699 event pairs, 30 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 649. Up to 147 conditions per place. [2024-06-21 15:45:18,025 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2024-06-21 15:45:18,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 265 flow [2024-06-21 15:45:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:45:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:45:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-06-21 15:45:18,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6293103448275862 [2024-06-21 15:45:18,027 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 185 flow. Second operand 4 states and 73 transitions. [2024-06-21 15:45:18,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 265 flow [2024-06-21 15:45:18,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 244 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:18,030 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 189 flow [2024-06-21 15:45:18,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-06-21 15:45:18,033 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-21 15:45:18,035 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 189 flow [2024-06-21 15:45:18,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:18,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:18,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:45:18,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:18,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -352774969, now seen corresponding path program 1 times [2024-06-21 15:45:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:18,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685577484] [2024-06-21 15:45:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:18,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:18,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685577484] [2024-06-21 15:45:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685577484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:18,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:18,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541264721] [2024-06-21 15:45:18,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:18,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:18,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:18,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:18,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:18,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,246 INFO L124 PetriNetUnfolderBase]: 102/213 cut-off events. [2024-06-21 15:45:18,247 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-21 15:45:18,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 213 events. 102/213 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 767 event pairs, 25 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 707. Up to 131 conditions per place. [2024-06-21 15:45:18,249 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 33 selfloop transitions, 18 changer transitions 0/56 dead transitions. [2024-06-21 15:45:18,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 379 flow [2024-06-21 15:45:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 15:45:18,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2024-06-21 15:45:18,250 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 189 flow. Second operand 6 states and 113 transitions. [2024-06-21 15:45:18,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 379 flow [2024-06-21 15:45:18,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 357 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 15:45:18,253 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 246 flow [2024-06-21 15:45:18,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-21 15:45:18,256 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-21 15:45:18,256 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 246 flow [2024-06-21 15:45:18,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:18,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:45:18,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash -890493847, now seen corresponding path program 2 times [2024-06-21 15:45:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:18,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077760354] [2024-06-21 15:45:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:18,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:18,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077760354] [2024-06-21 15:45:18,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077760354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:18,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:18,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619763950] [2024-06-21 15:45:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:18,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:18,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:18,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:18,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:18,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,415 INFO L124 PetriNetUnfolderBase]: 108/226 cut-off events. [2024-06-21 15:45:18,415 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2024-06-21 15:45:18,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 226 events. 108/226 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 846 event pairs, 25 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 825. Up to 164 conditions per place. [2024-06-21 15:45:18,417 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2024-06-21 15:45:18,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 402 flow [2024-06-21 15:45:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 15:45:18,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-21 15:45:18,418 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 246 flow. Second operand 6 states and 105 transitions. [2024-06-21 15:45:18,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 402 flow [2024-06-21 15:45:18,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 385 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 15:45:18,420 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 300 flow [2024-06-21 15:45:18,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-21 15:45:18,421 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2024-06-21 15:45:18,421 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 300 flow [2024-06-21 15:45:18,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:18,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:18,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:45:18,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:18,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1296369849, now seen corresponding path program 3 times [2024-06-21 15:45:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322809681] [2024-06-21 15:45:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:18,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:18,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322809681] [2024-06-21 15:45:18,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322809681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:18,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:18,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938920969] [2024-06-21 15:45:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:18,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:18,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:18,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:18,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 300 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:18,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,608 INFO L124 PetriNetUnfolderBase]: 109/230 cut-off events. [2024-06-21 15:45:18,609 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2024-06-21 15:45:18,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 230 events. 109/230 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 869 event pairs, 25 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 875. Up to 143 conditions per place. [2024-06-21 15:45:18,610 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 21 changer transitions 0/61 dead transitions. [2024-06-21 15:45:18,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 472 flow [2024-06-21 15:45:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 15:45:18,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-06-21 15:45:18,611 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 300 flow. Second operand 6 states and 111 transitions. [2024-06-21 15:45:18,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 472 flow [2024-06-21 15:45:18,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 435 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:45:18,614 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 338 flow [2024-06-21 15:45:18,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-06-21 15:45:18,614 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-21 15:45:18,614 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 338 flow [2024-06-21 15:45:18,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:18,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:18,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:45:18,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:18,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1296123585, now seen corresponding path program 1 times [2024-06-21 15:45:18,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:18,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361890273] [2024-06-21 15:45:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:18,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:18,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361890273] [2024-06-21 15:45:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361890273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:18,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:18,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217441024] [2024-06-21 15:45:18,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:18,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:18,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:18,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:18,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,754 INFO L124 PetriNetUnfolderBase]: 110/235 cut-off events. [2024-06-21 15:45:18,754 INFO L125 PetriNetUnfolderBase]: For 1064/1067 co-relation queries the response was YES. [2024-06-21 15:45:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 235 events. 110/235 cut-off events. For 1064/1067 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 899 event pairs, 29 based on Foata normal form. 6/238 useless extension candidates. Maximal degree in co-relation 925. Up to 160 conditions per place. [2024-06-21 15:45:18,756 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-06-21 15:45:18,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 458 flow [2024-06-21 15:45:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:45:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:45:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 15:45:18,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 15:45:18,757 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 338 flow. Second operand 5 states and 87 transitions. [2024-06-21 15:45:18,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 458 flow [2024-06-21 15:45:18,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 417 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:45:18,759 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 334 flow [2024-06-21 15:45:18,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-21 15:45:18,760 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2024-06-21 15:45:18,760 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 334 flow [2024-06-21 15:45:18,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:18,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:18,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:45:18,760 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:18,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1948878595, now seen corresponding path program 1 times [2024-06-21 15:45:18,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:18,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868108278] [2024-06-21 15:45:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:18,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:18,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868108278] [2024-06-21 15:45:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868108278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:18,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:18,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:18,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283681087] [2024-06-21 15:45:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:18,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:18,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:18,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:18,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:18,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,906 INFO L124 PetriNetUnfolderBase]: 108/230 cut-off events. [2024-06-21 15:45:18,906 INFO L125 PetriNetUnfolderBase]: For 885/888 co-relation queries the response was YES. [2024-06-21 15:45:18,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 230 events. 108/230 cut-off events. For 885/888 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 872 event pairs, 30 based on Foata normal form. 3/230 useless extension candidates. Maximal degree in co-relation 898. Up to 137 conditions per place. [2024-06-21 15:45:18,908 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 36 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2024-06-21 15:45:18,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 484 flow [2024-06-21 15:45:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 15:45:18,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-06-21 15:45:18,909 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 334 flow. Second operand 6 states and 106 transitions. [2024-06-21 15:45:18,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 484 flow [2024-06-21 15:45:18,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 447 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:45:18,914 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 338 flow [2024-06-21 15:45:18,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-06-21 15:45:18,915 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-21 15:45:18,916 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 338 flow [2024-06-21 15:45:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:18,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:18,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:45:18,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:18,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2084076081, now seen corresponding path program 2 times [2024-06-21 15:45:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108899490] [2024-06-21 15:45:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108899490] [2024-06-21 15:45:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108899490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:18,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:18,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:18,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090825046] [2024-06-21 15:45:18,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:18,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:19,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:19,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:19,062 INFO L124 PetriNetUnfolderBase]: 111/237 cut-off events. [2024-06-21 15:45:19,063 INFO L125 PetriNetUnfolderBase]: For 1054/1057 co-relation queries the response was YES. [2024-06-21 15:45:19,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 237 events. 111/237 cut-off events. For 1054/1057 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 919 event pairs, 28 based on Foata normal form. 3/237 useless extension candidates. Maximal degree in co-relation 931. Up to 147 conditions per place. [2024-06-21 15:45:19,064 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 22 changer transitions 0/62 dead transitions. [2024-06-21 15:45:19,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 516 flow [2024-06-21 15:45:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 15:45:19,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-06-21 15:45:19,065 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 338 flow. Second operand 7 states and 121 transitions. [2024-06-21 15:45:19,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 516 flow [2024-06-21 15:45:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 448 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:19,068 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 337 flow [2024-06-21 15:45:19,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-06-21 15:45:19,069 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2024-06-21 15:45:19,069 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 337 flow [2024-06-21 15:45:19,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:19,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:19,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:45:19,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:19,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2084081661, now seen corresponding path program 3 times [2024-06-21 15:45:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157774191] [2024-06-21 15:45:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:19,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157774191] [2024-06-21 15:45:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157774191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:19,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566550839] [2024-06-21 15:45:19,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:19,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:19,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:19,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:19,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:19,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:19,223 INFO L124 PetriNetUnfolderBase]: 109/234 cut-off events. [2024-06-21 15:45:19,224 INFO L125 PetriNetUnfolderBase]: For 1028/1031 co-relation queries the response was YES. [2024-06-21 15:45:19,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 234 events. 109/234 cut-off events. For 1028/1031 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 900 event pairs, 30 based on Foata normal form. 3/234 useless extension candidates. Maximal degree in co-relation 905. Up to 145 conditions per place. [2024-06-21 15:45:19,225 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 36 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2024-06-21 15:45:19,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 467 flow [2024-06-21 15:45:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:45:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:45:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 15:45:19,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-06-21 15:45:19,226 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 337 flow. Second operand 5 states and 91 transitions. [2024-06-21 15:45:19,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 467 flow [2024-06-21 15:45:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 419 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:19,229 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 331 flow [2024-06-21 15:45:19,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-06-21 15:45:19,230 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2024-06-21 15:45:19,230 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 331 flow [2024-06-21 15:45:19,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:19,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:19,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:19,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:45:19,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:19,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:19,231 INFO L85 PathProgramCache]: Analyzing trace with hash 285572008, now seen corresponding path program 1 times [2024-06-21 15:45:19,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:19,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290928240] [2024-06-21 15:45:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:19,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:19,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:19,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290928240] [2024-06-21 15:45:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290928240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:19,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:19,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034396297] [2024-06-21 15:45:19,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:19,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:19,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:19,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:19,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:19,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:19,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:19,403 INFO L124 PetriNetUnfolderBase]: 135/284 cut-off events. [2024-06-21 15:45:19,404 INFO L125 PetriNetUnfolderBase]: For 1698/1698 co-relation queries the response was YES. [2024-06-21 15:45:19,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 284 events. 135/284 cut-off events. For 1698/1698 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1151 event pairs, 25 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 1137. Up to 104 conditions per place. [2024-06-21 15:45:19,405 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 38 selfloop transitions, 28 changer transitions 0/71 dead transitions. [2024-06-21 15:45:19,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 547 flow [2024-06-21 15:45:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 15:45:19,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305418719211823 [2024-06-21 15:45:19,407 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 331 flow. Second operand 7 states and 128 transitions. [2024-06-21 15:45:19,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 547 flow [2024-06-21 15:45:19,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 71 transitions, 511 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:45:19,410 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 363 flow [2024-06-21 15:45:19,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2024-06-21 15:45:19,411 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-21 15:45:19,411 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 363 flow [2024-06-21 15:45:19,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:19,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:45:19,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:19,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1181367290, now seen corresponding path program 2 times [2024-06-21 15:45:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:19,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614432767] [2024-06-21 15:45:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:19,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:19,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614432767] [2024-06-21 15:45:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614432767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:19,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601481215] [2024-06-21 15:45:19,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:19,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:19,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:19,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:19,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 363 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:19,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:19,583 INFO L124 PetriNetUnfolderBase]: 139/292 cut-off events. [2024-06-21 15:45:19,583 INFO L125 PetriNetUnfolderBase]: For 2015/2015 co-relation queries the response was YES. [2024-06-21 15:45:19,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 292 events. 139/292 cut-off events. For 2015/2015 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1201 event pairs, 36 based on Foata normal form. 2/289 useless extension candidates. Maximal degree in co-relation 1224. Up to 195 conditions per place. [2024-06-21 15:45:19,585 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 27 changer transitions 0/67 dead transitions. [2024-06-21 15:45:19,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 533 flow [2024-06-21 15:45:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 15:45:19,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157635467980296 [2024-06-21 15:45:19,586 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 363 flow. Second operand 7 states and 125 transitions. [2024-06-21 15:45:19,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 533 flow [2024-06-21 15:45:19,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 479 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:45:19,590 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 379 flow [2024-06-21 15:45:19,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-06-21 15:45:19,591 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2024-06-21 15:45:19,591 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 379 flow [2024-06-21 15:45:19,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:19,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:19,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:45:19,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:19,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1339265732, now seen corresponding path program 3 times [2024-06-21 15:45:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:19,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834159924] [2024-06-21 15:45:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:19,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:19,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:19,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834159924] [2024-06-21 15:45:19,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834159924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:19,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:19,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:19,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845479864] [2024-06-21 15:45:19,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:19,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:19,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:19,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:19,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:19,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:19,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 379 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:19,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:19,810 INFO L124 PetriNetUnfolderBase]: 143/302 cut-off events. [2024-06-21 15:45:19,810 INFO L125 PetriNetUnfolderBase]: For 2370/2370 co-relation queries the response was YES. [2024-06-21 15:45:19,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 302 events. 143/302 cut-off events. For 2370/2370 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1258 event pairs, 33 based on Foata normal form. 2/301 useless extension candidates. Maximal degree in co-relation 1283. Up to 232 conditions per place. [2024-06-21 15:45:19,812 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 16 changer transitions 0/65 dead transitions. [2024-06-21 15:45:19,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 538 flow [2024-06-21 15:45:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 15:45:19,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-21 15:45:19,814 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 379 flow. Second operand 7 states and 119 transitions. [2024-06-21 15:45:19,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 538 flow [2024-06-21 15:45:19,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 480 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:19,818 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 370 flow [2024-06-21 15:45:19,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2024-06-21 15:45:19,819 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-21 15:45:19,819 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 370 flow [2024-06-21 15:45:19,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:19,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:19,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:45:19,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:19,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2066990596, now seen corresponding path program 4 times [2024-06-21 15:45:19,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:19,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668584152] [2024-06-21 15:45:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:19,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668584152] [2024-06-21 15:45:19,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668584152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:19,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:19,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:19,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797890535] [2024-06-21 15:45:19,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:19,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:19,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:19,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:19,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,007 INFO L124 PetriNetUnfolderBase]: 130/279 cut-off events. [2024-06-21 15:45:20,007 INFO L125 PetriNetUnfolderBase]: For 2413/2413 co-relation queries the response was YES. [2024-06-21 15:45:20,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 279 events. 130/279 cut-off events. For 2413/2413 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1165 event pairs, 13 based on Foata normal form. 10/286 useless extension candidates. Maximal degree in co-relation 1072. Up to 130 conditions per place. [2024-06-21 15:45:20,009 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 25 changer transitions 4/71 dead transitions. [2024-06-21 15:45:20,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 552 flow [2024-06-21 15:45:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 15:45:20,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625615763546798 [2024-06-21 15:45:20,010 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 370 flow. Second operand 7 states and 127 transitions. [2024-06-21 15:45:20,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 552 flow [2024-06-21 15:45:20,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 510 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:20,015 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 380 flow [2024-06-21 15:45:20,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2024-06-21 15:45:20,016 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2024-06-21 15:45:20,016 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 380 flow [2024-06-21 15:45:20,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-21 15:45:20,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:20,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:45:20,017 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:20,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -34530048, now seen corresponding path program 1 times [2024-06-21 15:45:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367591158] [2024-06-21 15:45:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:20,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:20,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367591158] [2024-06-21 15:45:20,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367591158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:20,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:20,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431146453] [2024-06-21 15:45:20,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:20,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:20,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:20,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:20,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:20,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,158 INFO L124 PetriNetUnfolderBase]: 128/277 cut-off events. [2024-06-21 15:45:20,158 INFO L125 PetriNetUnfolderBase]: For 1826/1826 co-relation queries the response was YES. [2024-06-21 15:45:20,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1122 conditions, 277 events. 128/277 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1152 event pairs, 26 based on Foata normal form. 2/276 useless extension candidates. Maximal degree in co-relation 1089. Up to 210 conditions per place. [2024-06-21 15:45:20,160 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 45 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-21 15:45:20,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 63 transitions, 526 flow [2024-06-21 15:45:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:45:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:45:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 15:45:20,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-06-21 15:45:20,161 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 380 flow. Second operand 5 states and 91 transitions. [2024-06-21 15:45:20,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 63 transitions, 526 flow [2024-06-21 15:45:20,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 466 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:45:20,165 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 358 flow [2024-06-21 15:45:20,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2024-06-21 15:45:20,166 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-21 15:45:20,166 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 358 flow [2024-06-21 15:45:20,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:20,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:45:20,167 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:20,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash -34233378, now seen corresponding path program 2 times [2024-06-21 15:45:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024367637] [2024-06-21 15:45:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:20,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:20,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:20,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024367637] [2024-06-21 15:45:20,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024367637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:20,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:20,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:45:20,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658274713] [2024-06-21 15:45:20,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:20,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:45:20,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:20,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:45:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:45:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:20,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,308 INFO L124 PetriNetUnfolderBase]: 125/274 cut-off events. [2024-06-21 15:45:20,308 INFO L125 PetriNetUnfolderBase]: For 1414/1417 co-relation queries the response was YES. [2024-06-21 15:45:20,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 274 events. 125/274 cut-off events. For 1414/1417 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1145 event pairs, 30 based on Foata normal form. 4/275 useless extension candidates. Maximal degree in co-relation 1004. Up to 185 conditions per place. [2024-06-21 15:45:20,310 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 45 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-06-21 15:45:20,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 488 flow [2024-06-21 15:45:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:45:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:45:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 15:45:20,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-21 15:45:20,311 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 358 flow. Second operand 5 states and 85 transitions. [2024-06-21 15:45:20,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 488 flow [2024-06-21 15:45:20,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:45:20,314 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 356 flow [2024-06-21 15:45:20,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2024-06-21 15:45:20,315 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2024-06-21 15:45:20,315 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 356 flow [2024-06-21 15:45:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:20,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:20,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:45:20,316 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:20,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash 177894052, now seen corresponding path program 1 times [2024-06-21 15:45:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:20,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457623171] [2024-06-21 15:45:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:20,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:20,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457623171] [2024-06-21 15:45:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457623171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:20,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471578615] [2024-06-21 15:45:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:20,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:20,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:20,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:20,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:20,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,475 INFO L124 PetriNetUnfolderBase]: 148/331 cut-off events. [2024-06-21 15:45:20,475 INFO L125 PetriNetUnfolderBase]: For 2722/2725 co-relation queries the response was YES. [2024-06-21 15:45:20,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1263 conditions, 331 events. 148/331 cut-off events. For 2722/2725 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1481 event pairs, 41 based on Foata normal form. 8/336 useless extension candidates. Maximal degree in co-relation 1229. Up to 128 conditions per place. [2024-06-21 15:45:20,477 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 39 selfloop transitions, 16 changer transitions 12/72 dead transitions. [2024-06-21 15:45:20,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 570 flow [2024-06-21 15:45:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 15:45:20,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2024-06-21 15:45:20,478 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 356 flow. Second operand 7 states and 122 transitions. [2024-06-21 15:45:20,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 570 flow [2024-06-21 15:45:20,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 544 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:45:20,483 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 343 flow [2024-06-21 15:45:20,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2024-06-21 15:45:20,483 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 15:45:20,483 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 343 flow [2024-06-21 15:45:20,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:20,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:20,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:45:20,484 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:20,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1485036200, now seen corresponding path program 2 times [2024-06-21 15:45:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:20,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156951489] [2024-06-21 15:45:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:20,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:20,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:20,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156951489] [2024-06-21 15:45:20,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156951489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:20,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:20,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031273813] [2024-06-21 15:45:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:20,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:20,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:20,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,627 INFO L124 PetriNetUnfolderBase]: 136/307 cut-off events. [2024-06-21 15:45:20,627 INFO L125 PetriNetUnfolderBase]: For 3302/3305 co-relation queries the response was YES. [2024-06-21 15:45:20,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 307 events. 136/307 cut-off events. For 3302/3305 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1386 event pairs, 47 based on Foata normal form. 10/314 useless extension candidates. Maximal degree in co-relation 1160. Up to 178 conditions per place. [2024-06-21 15:45:20,628 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 15 changer transitions 9/62 dead transitions. [2024-06-21 15:45:20,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 62 transitions, 491 flow [2024-06-21 15:45:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 15:45:20,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763546798029556 [2024-06-21 15:45:20,630 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 343 flow. Second operand 7 states and 117 transitions. [2024-06-21 15:45:20,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 62 transitions, 491 flow [2024-06-21 15:45:20,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 62 transitions, 453 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:20,634 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 321 flow [2024-06-21 15:45:20,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=321, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2024-06-21 15:45:20,635 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-06-21 15:45:20,635 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 321 flow [2024-06-21 15:45:20,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:20,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:45:20,636 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:20,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash -593009364, now seen corresponding path program 3 times [2024-06-21 15:45:20,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:20,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491160360] [2024-06-21 15:45:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:20,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491160360] [2024-06-21 15:45:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491160360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:20,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:20,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255069068] [2024-06-21 15:45:20,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:20,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:20,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:20,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 321 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:20,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:20,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,792 INFO L124 PetriNetUnfolderBase]: 127/292 cut-off events. [2024-06-21 15:45:20,793 INFO L125 PetriNetUnfolderBase]: For 2648/2651 co-relation queries the response was YES. [2024-06-21 15:45:20,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 292 events. 127/292 cut-off events. For 2648/2651 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1290 event pairs, 41 based on Foata normal form. 8/297 useless extension candidates. Maximal degree in co-relation 1077. Up to 168 conditions per place. [2024-06-21 15:45:20,795 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 28 selfloop transitions, 12 changer transitions 14/59 dead transitions. [2024-06-21 15:45:20,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 59 transitions, 457 flow [2024-06-21 15:45:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:45:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:45:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 15:45:20,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665024630541872 [2024-06-21 15:45:20,796 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 321 flow. Second operand 7 states and 115 transitions. [2024-06-21 15:45:20,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 59 transitions, 457 flow [2024-06-21 15:45:20,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 423 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:20,801 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 283 flow [2024-06-21 15:45:20,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2024-06-21 15:45:20,802 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 41 predicate places. [2024-06-21 15:45:20,802 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 283 flow [2024-06-21 15:45:20,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:20,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:20,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:45:20,803 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:20,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1342334962, now seen corresponding path program 4 times [2024-06-21 15:45:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:20,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457783404] [2024-06-21 15:45:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:20,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457783404] [2024-06-21 15:45:20,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457783404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:20,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:20,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:20,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377384293] [2024-06-21 15:45:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:20,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:20,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:20,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:20,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:20,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:20,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 283 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:20,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:20,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:20,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,993 INFO L124 PetriNetUnfolderBase]: 120/269 cut-off events. [2024-06-21 15:45:20,993 INFO L125 PetriNetUnfolderBase]: For 2522/2530 co-relation queries the response was YES. [2024-06-21 15:45:20,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 269 events. 120/269 cut-off events. For 2522/2530 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1169 event pairs, 43 based on Foata normal form. 16/282 useless extension candidates. Maximal degree in co-relation 985. Up to 164 conditions per place. [2024-06-21 15:45:20,995 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 24 selfloop transitions, 15 changer transitions 9/53 dead transitions. [2024-06-21 15:45:20,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 405 flow [2024-06-21 15:45:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 15:45:20,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474137931034483 [2024-06-21 15:45:20,997 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 283 flow. Second operand 8 states and 127 transitions. [2024-06-21 15:45:20,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 405 flow [2024-06-21 15:45:20,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 373 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:21,000 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 265 flow [2024-06-21 15:45:21,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2024-06-21 15:45:21,001 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-06-21 15:45:21,001 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 265 flow [2024-06-21 15:45:21,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:21,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:21,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:45:21,001 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:21,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1342119760, now seen corresponding path program 1 times [2024-06-21 15:45:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:21,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685512553] [2024-06-21 15:45:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:21,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685512553] [2024-06-21 15:45:21,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685512553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:21,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:21,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:21,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144511318] [2024-06-21 15:45:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:21,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:21,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:21,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:21,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:21,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:21,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:21,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:21,199 INFO L124 PetriNetUnfolderBase]: 126/289 cut-off events. [2024-06-21 15:45:21,199 INFO L125 PetriNetUnfolderBase]: For 2237/2245 co-relation queries the response was YES. [2024-06-21 15:45:21,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 289 events. 126/289 cut-off events. For 2237/2245 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1301 event pairs, 50 based on Foata normal form. 14/300 useless extension candidates. Maximal degree in co-relation 1055. Up to 131 conditions per place. [2024-06-21 15:45:21,200 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 28 selfloop transitions, 14 changer transitions 7/54 dead transitions. [2024-06-21 15:45:21,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 425 flow [2024-06-21 15:45:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 15:45:21,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560344827586207 [2024-06-21 15:45:21,217 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 265 flow. Second operand 8 states and 129 transitions. [2024-06-21 15:45:21,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 425 flow [2024-06-21 15:45:21,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 387 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:45:21,219 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 245 flow [2024-06-21 15:45:21,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2024-06-21 15:45:21,220 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-21 15:45:21,220 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 245 flow [2024-06-21 15:45:21,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:21,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:45:21,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:21,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1347691390, now seen corresponding path program 2 times [2024-06-21 15:45:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:21,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293212722] [2024-06-21 15:45:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:21,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:21,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:21,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293212722] [2024-06-21 15:45:21,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293212722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:21,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:21,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615356050] [2024-06-21 15:45:21,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:21,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:21,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:21,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:21,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:21,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:21,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:21,369 INFO L124 PetriNetUnfolderBase]: 99/232 cut-off events. [2024-06-21 15:45:21,370 INFO L125 PetriNetUnfolderBase]: For 1529/1537 co-relation queries the response was YES. [2024-06-21 15:45:21,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832 conditions, 232 events. 99/232 cut-off events. For 1529/1537 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 963 event pairs, 45 based on Foata normal form. 16/245 useless extension candidates. Maximal degree in co-relation 803. Up to 137 conditions per place. [2024-06-21 15:45:21,371 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 23 selfloop transitions, 7 changer transitions 10/45 dead transitions. [2024-06-21 15:45:21,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 45 transitions, 347 flow [2024-06-21 15:45:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 15:45:21,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-06-21 15:45:21,372 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 245 flow. Second operand 6 states and 98 transitions. [2024-06-21 15:45:21,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 45 transitions, 347 flow [2024-06-21 15:45:21,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 45 transitions, 309 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:21,374 INFO L231 Difference]: Finished difference. Result has 60 places, 33 transitions, 195 flow [2024-06-21 15:45:21,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=60, PETRI_TRANSITIONS=33} [2024-06-21 15:45:21,375 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2024-06-21 15:45:21,375 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 33 transitions, 195 flow [2024-06-21 15:45:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:21,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:21,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:45:21,375 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:21,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1347845212, now seen corresponding path program 5 times [2024-06-21 15:45:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:21,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852152093] [2024-06-21 15:45:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852152093] [2024-06-21 15:45:21,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852152093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:21,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:21,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:21,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296190835] [2024-06-21 15:45:21,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:21,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:21,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:21,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:21,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:21,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:21,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 33 transitions, 195 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:21,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:21,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:21,520 INFO L124 PetriNetUnfolderBase]: 73/182 cut-off events. [2024-06-21 15:45:21,520 INFO L125 PetriNetUnfolderBase]: For 956/956 co-relation queries the response was YES. [2024-06-21 15:45:21,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 182 events. 73/182 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 662 event pairs, 28 based on Foata normal form. 6/185 useless extension candidates. Maximal degree in co-relation 570. Up to 62 conditions per place. [2024-06-21 15:45:21,521 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 16 selfloop transitions, 3 changer transitions 18/42 dead transitions. [2024-06-21 15:45:21,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 42 transitions, 289 flow [2024-06-21 15:45:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 15:45:21,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-06-21 15:45:21,522 INFO L175 Difference]: Start difference. First operand has 60 places, 33 transitions, 195 flow. Second operand 6 states and 96 transitions. [2024-06-21 15:45:21,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 42 transitions, 289 flow [2024-06-21 15:45:21,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 42 transitions, 271 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:21,524 INFO L231 Difference]: Finished difference. Result has 58 places, 23 transitions, 109 flow [2024-06-21 15:45:21,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=58, PETRI_TRANSITIONS=23} [2024-06-21 15:45:21,524 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-21 15:45:21,524 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 23 transitions, 109 flow [2024-06-21 15:45:21,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:21,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:21,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:45:21,525 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:21,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1326931438, now seen corresponding path program 3 times [2024-06-21 15:45:21,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:21,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403243894] [2024-06-21 15:45:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:21,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:21,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403243894] [2024-06-21 15:45:21,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403243894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:21,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:21,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614875402] [2024-06-21 15:45:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:21,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:21,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:21,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:21,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 23 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:21,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:21,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:21,677 INFO L124 PetriNetUnfolderBase]: 42/109 cut-off events. [2024-06-21 15:45:21,678 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-21 15:45:21,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 109 events. 42/109 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 309 event pairs, 17 based on Foata normal form. 6/114 useless extension candidates. Maximal degree in co-relation 328. Up to 52 conditions per place. [2024-06-21 15:45:21,678 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 14 selfloop transitions, 2 changer transitions 10/31 dead transitions. [2024-06-21 15:45:21,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 31 transitions, 181 flow [2024-06-21 15:45:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-21 15:45:21,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-06-21 15:45:21,680 INFO L175 Difference]: Start difference. First operand has 58 places, 23 transitions, 109 flow. Second operand 6 states and 93 transitions. [2024-06-21 15:45:21,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 31 transitions, 181 flow [2024-06-21 15:45:21,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 156 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:21,681 INFO L231 Difference]: Finished difference. Result has 45 places, 20 transitions, 78 flow [2024-06-21 15:45:21,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=45, PETRI_TRANSITIONS=20} [2024-06-21 15:45:21,681 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-21 15:45:21,682 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 20 transitions, 78 flow [2024-06-21 15:45:21,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:21,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:21,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:45:21,682 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:45:21,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1061234158, now seen corresponding path program 4 times [2024-06-21 15:45:21,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:21,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098904911] [2024-06-21 15:45:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098904911] [2024-06-21 15:45:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098904911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:21,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:45:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522692358] [2024-06-21 15:45:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:21,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:45:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:45:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:45:21,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-21 15:45:21,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 20 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:21,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-21 15:45:21,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:21,805 INFO L124 PetriNetUnfolderBase]: 20/59 cut-off events. [2024-06-21 15:45:21,805 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2024-06-21 15:45:21,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 59 events. 20/59 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 2 based on Foata normal form. 6/64 useless extension candidates. Maximal degree in co-relation 136. Up to 24 conditions per place. [2024-06-21 15:45:21,806 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-06-21 15:45:21,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 24 transitions, 108 flow [2024-06-21 15:45:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:45:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:45:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-06-21 15:45:21,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-06-21 15:45:21,807 INFO L175 Difference]: Start difference. First operand has 45 places, 20 transitions, 78 flow. Second operand 6 states and 86 transitions. [2024-06-21 15:45:21,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 24 transitions, 108 flow [2024-06-21 15:45:21,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 24 transitions, 92 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:21,807 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2024-06-21 15:45:21,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2024-06-21 15:45:21,808 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2024-06-21 15:45:21,808 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2024-06-21 15:45:21,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,810 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 15:45:21,810 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 15:45:21,811 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 15:45:21,811 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 15:45:21,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:45:21,811 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:21,813 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 15:45:21,813 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 15:45:21,816 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 15:45:21,816 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 15:45:21,817 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 03:45:21 BasicIcfg [2024-06-21 15:45:21,817 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 15:45:21,817 INFO L158 Benchmark]: Toolchain (without parser) took 6238.89ms. Allocated memory was 174.1MB in the beginning and 234.9MB in the end (delta: 60.8MB). Free memory was 116.8MB in the beginning and 155.9MB in the end (delta: -39.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-21 15:45:21,818 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 174.1MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:45:21,818 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 174.1MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:45:21,818 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.11ms. Allocated memory is still 174.1MB. Free memory was 116.4MB in the beginning and 91.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 15:45:21,818 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.25ms. Allocated memory is still 174.1MB. Free memory was 91.1MB in the beginning and 89.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:45:21,818 INFO L158 Benchmark]: Boogie Preprocessor took 45.52ms. Allocated memory is still 174.1MB. Free memory was 89.1MB in the beginning and 87.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:45:21,818 INFO L158 Benchmark]: RCFGBuilder took 416.93ms. Allocated memory is still 174.1MB. Free memory was 87.0MB in the beginning and 66.9MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-21 15:45:21,819 INFO L158 Benchmark]: TraceAbstraction took 5273.50ms. Allocated memory was 174.1MB in the beginning and 234.9MB in the end (delta: 60.8MB). Free memory was 66.0MB in the beginning and 155.9MB in the end (delta: -89.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:45:21,820 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 174.1MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 174.1MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 442.11ms. Allocated memory is still 174.1MB. Free memory was 116.4MB in the beginning and 91.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.25ms. Allocated memory is still 174.1MB. Free memory was 91.1MB in the beginning and 89.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.52ms. Allocated memory is still 174.1MB. Free memory was 89.1MB in the beginning and 87.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 416.93ms. Allocated memory is still 174.1MB. Free memory was 87.0MB in the beginning and 66.9MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 5273.50ms. Allocated memory was 174.1MB in the beginning and 234.9MB in the end (delta: 60.8MB). Free memory was 66.0MB in the beginning and 155.9MB in the end (delta: -89.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 761]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 762]: 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, 46 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: 5.2s, OverallIterations: 27, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1199 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 839 mSDsluCounter, 387 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 217 mSDsCounter, 133 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3356 IncrementalHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 133 mSolverCounterUnsat, 170 mSDtfsCounter, 3356 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=380occurred in iteration=16, InterpolantAutomatonStates: 162, 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, 1.9s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 342 ConstructedInterpolants, 0 QuantifiedInterpolants, 2631 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 15:45:21,853 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