./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.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-7724a2d-m [2024-06-27 19:26:02,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:26:02,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:26:02,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:26:02,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:26:02,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:26:02,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:26:02,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:26:02,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:26:02,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:26:02,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:26:02,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:26:02,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:26:02,303 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:26:02,303 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:26:02,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:26:02,304 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:26:02,304 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:26:02,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:26:02,304 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:26:02,304 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:26:02,305 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:26:02,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:26:02,305 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:26:02,305 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:26:02,305 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:26:02,306 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:26:02,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:26:02,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:26:02,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:26:02,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:26:02,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:26:02,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:26:02,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:26:02,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:26:02,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:26:02,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:26:02,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:26:02,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:26:02,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:26:02,309 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:26:02,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:26:02,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:26:02,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:26:02,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:26:02,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:26:02,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:26:02,552 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:26:02,553 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:26:02,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 19:26:02,657 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:26:02,657 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:26:02,657 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:26:03,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:26:03,940 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:26:03,941 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:26:03,955 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98609d3e4/926e03b442624ad7842b3b0d65898283/FLAG90e5bda9c [2024-06-27 19:26:03,964 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98609d3e4/926e03b442624ad7842b3b0d65898283 [2024-06-27 19:26:03,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:26:03,966 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:26:03,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:26:03,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:26:03,972 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:26:03,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:26:02" (1/2) ... [2024-06-27 19:26:03,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c178841 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:26:03, skipping insertion in model container [2024-06-27 19:26:03,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:26:02" (1/2) ... [2024-06-27 19:26:03,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ada5a8e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:26:03, skipping insertion in model container [2024-06-27 19:26:03,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:26:03" (2/2) ... [2024-06-27 19:26:03,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c178841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:03, skipping insertion in model container [2024-06-27 19:26:03,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:26:03" (2/2) ... [2024-06-27 19:26:03,975 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:26:04,007 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:26:04,008 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 19:26:04,008 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 19:26:04,008 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 19:26:04,008 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 19:26:04,008 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:26:04,008 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-27 19:26:04,052 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:26:04,348 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:26:04,357 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:26:04,461 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:26:04,495 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:26:04,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04 WrapperNode [2024-06-27 19:26:04,497 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:26:04,498 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:26:04,498 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:26:04,498 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:26:04,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,522 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,541 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-27 19:26:04,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:26:04,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:26:04,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:26:04,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:26:04,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,587 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]. [2024-06-27 19:26:04,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:26:04,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:26:04,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:26:04,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:26:04,607 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (1/1) ... [2024-06-27 19:26:04,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:26:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:26:04,633 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) [2024-06-27 19:26:04,647 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 [2024-06-27 19:26:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:26:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:26:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:26:04,671 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:26:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:26:04,672 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:26:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:26:04,672 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:26:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 19:26:04,672 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 19:26:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:26:04,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:26:04,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:26:04,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:26:04,674 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:26:04,800 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:26:04,802 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:26:05,001 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:26:05,001 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:26:05,086 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:26:05,087 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:26:05,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:26:05 BoogieIcfgContainer [2024-06-27 19:26:05,087 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:26:05,088 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:26:05,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:26:05,091 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:26:05,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:26:02" (1/4) ... [2024-06-27 19:26:05,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cfa0ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:26:05, skipping insertion in model container [2024-06-27 19:26:05,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:26:03" (2/4) ... [2024-06-27 19:26:05,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cfa0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:26:05, skipping insertion in model container [2024-06-27 19:26:05,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:26:04" (3/4) ... [2024-06-27 19:26:05,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cfa0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:26:05, skipping insertion in model container [2024-06-27 19:26:05,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:26:05" (4/4) ... [2024-06-27 19:26:05,093 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:26:05,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:26:05,105 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:26:05,105 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:26:05,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:26:05,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-27 19:26:05,208 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-27 19:26:05,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:26:05,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:26:05,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-27 19:26:05,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-27 19:26:05,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:26:05,226 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;@4276cae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:26:05,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 19:26:05,231 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:26:05,231 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:26:05,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:26:05,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:05,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:26:05,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:05,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash 225172065, now seen corresponding path program 1 times [2024-06-27 19:26:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:05,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714115893] [2024-06-27 19:26:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:05,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:05,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714115893] [2024-06-27 19:26:05,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714115893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:05,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:05,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:26:05,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361974443] [2024-06-27 19:26:05,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:05,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:26:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:26:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:26:05,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:26:05,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2024-06-27 19:26:05,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:05,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:26:05,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:05,918 INFO L124 PetriNetUnfolderBase]: 2723/4049 cut-off events. [2024-06-27 19:26:05,918 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-27 19:26:05,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8049 conditions, 4049 events. 2723/4049 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22395 event pairs, 1898 based on Foata normal form. 1/3918 useless extension candidates. Maximal degree in co-relation 8036. Up to 3813 conditions per place. [2024-06-27 19:26:05,946 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 37 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-27 19:26:05,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 211 flow [2024-06-27 19:26:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:26:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:26:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-27 19:26:05,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-06-27 19:26:05,957 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 103 transitions. [2024-06-27 19:26:05,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 211 flow [2024-06-27 19:26:05,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 204 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:05,961 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-27 19:26:05,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-27 19:26:05,965 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-27 19:26:05,965 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-27 19:26:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2024-06-27 19:26:05,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:05,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:26:05,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:05,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash -623443094, now seen corresponding path program 1 times [2024-06-27 19:26:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:05,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493830098] [2024-06-27 19:26:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:05,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493830098] [2024-06-27 19:26:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493830098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:06,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:06,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:26:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724238227] [2024-06-27 19:26:06,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:06,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:26:06,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:26:06,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:26:06,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:06,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:06,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:06,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:06,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:06,597 INFO L124 PetriNetUnfolderBase]: 4385/6499 cut-off events. [2024-06-27 19:26:06,597 INFO L125 PetriNetUnfolderBase]: For 1123/1132 co-relation queries the response was YES. [2024-06-27 19:26:06,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 6499 events. 4385/6499 cut-off events. For 1123/1132 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36112 event pairs, 1932 based on Foata normal form. 11/6499 useless extension candidates. Maximal degree in co-relation 14753. Up to 5945 conditions per place. [2024-06-27 19:26:06,636 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 58 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-27 19:26:06,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 376 flow [2024-06-27 19:26:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:26:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:26:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-27 19:26:06,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989795918367347 [2024-06-27 19:26:06,642 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 137 transitions. [2024-06-27 19:26:06,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 376 flow [2024-06-27 19:26:06,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:06,650 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 222 flow [2024-06-27 19:26:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-27 19:26:06,650 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-27 19:26:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 222 flow [2024-06-27 19:26:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:06,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:06,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:26:06,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:06,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2128306583, now seen corresponding path program 1 times [2024-06-27 19:26:06,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:06,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229119200] [2024-06-27 19:26:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229119200] [2024-06-27 19:26:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229119200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:06,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200345685] [2024-06-27 19:26:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:06,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:06,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:06,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:06,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:06,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:07,396 INFO L124 PetriNetUnfolderBase]: 4527/6713 cut-off events. [2024-06-27 19:26:07,396 INFO L125 PetriNetUnfolderBase]: For 4346/4370 co-relation queries the response was YES. [2024-06-27 19:26:07,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18077 conditions, 6713 events. 4527/6713 cut-off events. For 4346/4370 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37507 event pairs, 1443 based on Foata normal form. 46/6748 useless extension candidates. Maximal degree in co-relation 18062. Up to 5937 conditions per place. [2024-06-27 19:26:07,440 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 68 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-27 19:26:07,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 506 flow [2024-06-27 19:26:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-27 19:26:07,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6816326530612244 [2024-06-27 19:26:07,445 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 222 flow. Second operand 5 states and 167 transitions. [2024-06-27 19:26:07,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 506 flow [2024-06-27 19:26:07,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 502 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:26:07,449 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 277 flow [2024-06-27 19:26:07,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-27 19:26:07,451 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-27 19:26:07,451 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 277 flow [2024-06-27 19:26:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:07,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:07,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:26:07,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:07,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1404815442, now seen corresponding path program 1 times [2024-06-27 19:26:07,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:07,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616384246] [2024-06-27 19:26:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:07,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:07,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616384246] [2024-06-27 19:26:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616384246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:07,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:26:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450420602] [2024-06-27 19:26:07,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:07,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:26:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:07,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:26:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:26:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:07,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:07,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:07,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:08,015 INFO L124 PetriNetUnfolderBase]: 3542/5228 cut-off events. [2024-06-27 19:26:08,015 INFO L125 PetriNetUnfolderBase]: For 5883/5883 co-relation queries the response was YES. [2024-06-27 19:26:08,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15769 conditions, 5228 events. 3542/5228 cut-off events. For 5883/5883 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29056 event pairs, 1668 based on Foata normal form. 6/5225 useless extension candidates. Maximal degree in co-relation 15751. Up to 4874 conditions per place. [2024-06-27 19:26:08,041 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 52 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-06-27 19:26:08,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 464 flow [2024-06-27 19:26:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:26:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:26:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 19:26:08,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-27 19:26:08,043 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 277 flow. Second operand 4 states and 131 transitions. [2024-06-27 19:26:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 464 flow [2024-06-27 19:26:08,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 429 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:08,046 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 306 flow [2024-06-27 19:26:08,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-27 19:26:08,047 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-27 19:26:08,047 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 306 flow [2024-06-27 19:26:08,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:08,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:08,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:08,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:26:08,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:08,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1006660495, now seen corresponding path program 1 times [2024-06-27 19:26:08,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:08,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360197549] [2024-06-27 19:26:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:08,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:08,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360197549] [2024-06-27 19:26:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360197549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:08,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:08,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:26:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060293516] [2024-06-27 19:26:08,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:08,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:26:08,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:26:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:26:08,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:08,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:08,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:08,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:08,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:08,511 INFO L124 PetriNetUnfolderBase]: 3655/5429 cut-off events. [2024-06-27 19:26:08,511 INFO L125 PetriNetUnfolderBase]: For 7448/7448 co-relation queries the response was YES. [2024-06-27 19:26:08,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16682 conditions, 5429 events. 3655/5429 cut-off events. For 7448/7448 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30247 event pairs, 1490 based on Foata normal form. 30/5450 useless extension candidates. Maximal degree in co-relation 16662. Up to 4863 conditions per place. [2024-06-27 19:26:08,540 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 63 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-27 19:26:08,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 560 flow [2024-06-27 19:26:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 19:26:08,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2024-06-27 19:26:08,544 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 306 flow. Second operand 5 states and 163 transitions. [2024-06-27 19:26:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 560 flow [2024-06-27 19:26:08,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 545 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:08,549 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 362 flow [2024-06-27 19:26:08,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 19:26:08,554 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-06-27 19:26:08,554 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 362 flow [2024-06-27 19:26:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:08,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:26:08,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:08,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash -957714512, now seen corresponding path program 1 times [2024-06-27 19:26:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:08,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022938509] [2024-06-27 19:26:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:08,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:08,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022938509] [2024-06-27 19:26:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022938509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:08,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:08,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:26:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298983689] [2024-06-27 19:26:08,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:08,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:26:08,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:26:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:26:08,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:08,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:08,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:08,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:09,130 INFO L124 PetriNetUnfolderBase]: 4565/6735 cut-off events. [2024-06-27 19:26:09,130 INFO L125 PetriNetUnfolderBase]: For 12227/12230 co-relation queries the response was YES. [2024-06-27 19:26:09,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21804 conditions, 6735 events. 4565/6735 cut-off events. For 12227/12230 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 37212 event pairs, 1849 based on Foata normal form. 5/6733 useless extension candidates. Maximal degree in co-relation 21782. Up to 6310 conditions per place. [2024-06-27 19:26:09,175 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-27 19:26:09,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 676 flow [2024-06-27 19:26:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:26:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:26:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 19:26:09,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:26:09,176 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 362 flow. Second operand 4 states and 126 transitions. [2024-06-27 19:26:09,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 676 flow [2024-06-27 19:26:09,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 631 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:09,189 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 450 flow [2024-06-27 19:26:09,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2024-06-27 19:26:09,192 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-27 19:26:09,192 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 450 flow [2024-06-27 19:26:09,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:09,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:09,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:09,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:26:09,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:09,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1112143450, now seen corresponding path program 1 times [2024-06-27 19:26:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433053890] [2024-06-27 19:26:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:09,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433053890] [2024-06-27 19:26:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433053890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:09,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431340576] [2024-06-27 19:26:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:09,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:09,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:09,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 450 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:09,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:09,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:09,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:09,846 INFO L124 PetriNetUnfolderBase]: 4606/6794 cut-off events. [2024-06-27 19:26:09,846 INFO L125 PetriNetUnfolderBase]: For 18135/18141 co-relation queries the response was YES. [2024-06-27 19:26:09,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24105 conditions, 6794 events. 4606/6794 cut-off events. For 18135/18141 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37884 event pairs, 1275 based on Foata normal form. 19/6800 useless extension candidates. Maximal degree in co-relation 24081. Up to 5615 conditions per place. [2024-06-27 19:26:09,886 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 83 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-27 19:26:09,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 811 flow [2024-06-27 19:26:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 19:26:09,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 19:26:09,888 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 450 flow. Second operand 5 states and 161 transitions. [2024-06-27 19:26:09,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 811 flow [2024-06-27 19:26:09,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 797 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-27 19:26:09,902 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 529 flow [2024-06-27 19:26:09,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-27 19:26:09,903 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2024-06-27 19:26:09,903 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 529 flow [2024-06-27 19:26:09,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:09,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:09,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:26:09,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:09,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1638247816, now seen corresponding path program 1 times [2024-06-27 19:26:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020610144] [2024-06-27 19:26:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:09,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:09,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:09,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020610144] [2024-06-27 19:26:09,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020610144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:09,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:09,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:09,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439842492] [2024-06-27 19:26:09,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:09,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:09,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:10,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:10,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 529 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:10,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:10,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:10,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:10,514 INFO L124 PetriNetUnfolderBase]: 4567/6763 cut-off events. [2024-06-27 19:26:10,515 INFO L125 PetriNetUnfolderBase]: For 22468/22474 co-relation queries the response was YES. [2024-06-27 19:26:10,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25083 conditions, 6763 events. 4567/6763 cut-off events. For 22468/22474 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37733 event pairs, 990 based on Foata normal form. 19/6769 useless extension candidates. Maximal degree in co-relation 25056. Up to 5597 conditions per place. [2024-06-27 19:26:10,549 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-27 19:26:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 802 flow [2024-06-27 19:26:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 19:26:10,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-27 19:26:10,551 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 529 flow. Second operand 5 states and 158 transitions. [2024-06-27 19:26:10,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 802 flow [2024-06-27 19:26:10,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 775 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:10,573 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 535 flow [2024-06-27 19:26:10,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 19:26:10,574 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-27 19:26:10,574 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 535 flow [2024-06-27 19:26:10,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:10,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:10,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:10,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:26:10,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:10,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:10,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1368154938, now seen corresponding path program 1 times [2024-06-27 19:26:10,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:10,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154824688] [2024-06-27 19:26:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:10,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:10,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154824688] [2024-06-27 19:26:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154824688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:10,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:10,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:26:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001422434] [2024-06-27 19:26:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:26:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:26:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:26:10,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:10,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:11,111 INFO L124 PetriNetUnfolderBase]: 4397/6624 cut-off events. [2024-06-27 19:26:11,111 INFO L125 PetriNetUnfolderBase]: For 25979/25988 co-relation queries the response was YES. [2024-06-27 19:26:11,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25249 conditions, 6624 events. 4397/6624 cut-off events. For 25979/25988 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 38108 event pairs, 1748 based on Foata normal form. 10/6621 useless extension candidates. Maximal degree in co-relation 25220. Up to 5898 conditions per place. [2024-06-27 19:26:11,165 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 73 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-27 19:26:11,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 983 flow [2024-06-27 19:26:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-27 19:26:11,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-27 19:26:11,166 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 535 flow. Second operand 5 states and 162 transitions. [2024-06-27 19:26:11,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 983 flow [2024-06-27 19:26:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 927 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:11,199 INFO L231 Difference]: Finished difference. Result has 77 places, 93 transitions, 698 flow [2024-06-27 19:26:11,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=698, PETRI_PLACES=77, PETRI_TRANSITIONS=93} [2024-06-27 19:26:11,200 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-27 19:26:11,200 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 93 transitions, 698 flow [2024-06-27 19:26:11,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:11,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:26:11,201 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:11,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1034294440, now seen corresponding path program 2 times [2024-06-27 19:26:11,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146821912] [2024-06-27 19:26:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:11,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146821912] [2024-06-27 19:26:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146821912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:11,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:11,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:26:11,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47648505] [2024-06-27 19:26:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:26:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:26:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:26:11,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:11,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 93 transitions, 698 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:11,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:11,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:11,742 INFO L124 PetriNetUnfolderBase]: 4452/6723 cut-off events. [2024-06-27 19:26:11,743 INFO L125 PetriNetUnfolderBase]: For 33232/33244 co-relation queries the response was YES. [2024-06-27 19:26:11,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 6723 events. 4452/6723 cut-off events. For 33232/33244 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38647 event pairs, 1730 based on Foata normal form. 12/6729 useless extension candidates. Maximal degree in co-relation 27896. Up to 6020 conditions per place. [2024-06-27 19:26:11,786 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 88 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-27 19:26:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 1135 flow [2024-06-27 19:26:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-27 19:26:11,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-27 19:26:11,788 INFO L175 Difference]: Start difference. First operand has 77 places, 93 transitions, 698 flow. Second operand 5 states and 165 transitions. [2024-06-27 19:26:11,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 1135 flow [2024-06-27 19:26:11,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 131 transitions, 1103 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 19:26:11,832 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 869 flow [2024-06-27 19:26:11,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=869, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2024-06-27 19:26:11,833 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2024-06-27 19:26:11,833 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 869 flow [2024-06-27 19:26:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:11,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:11,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:26:11,834 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:11,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1566017158, now seen corresponding path program 1 times [2024-06-27 19:26:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435439474] [2024-06-27 19:26:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:11,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:11,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:11,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435439474] [2024-06-27 19:26:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435439474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:11,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:11,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14747084] [2024-06-27 19:26:11,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:11,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:11,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:11,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:11,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:11,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:12,416 INFO L124 PetriNetUnfolderBase]: 4700/6991 cut-off events. [2024-06-27 19:26:12,416 INFO L125 PetriNetUnfolderBase]: For 38876/38905 co-relation queries the response was YES. [2024-06-27 19:26:12,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29533 conditions, 6991 events. 4700/6991 cut-off events. For 38876/38905 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39520 event pairs, 1793 based on Foata normal form. 24/6997 useless extension candidates. Maximal degree in co-relation 29498. Up to 6271 conditions per place. [2024-06-27 19:26:12,456 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 83 selfloop transitions, 44 changer transitions 0/136 dead transitions. [2024-06-27 19:26:12,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1330 flow [2024-06-27 19:26:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-27 19:26:12,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-27 19:26:12,458 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 869 flow. Second operand 5 states and 162 transitions. [2024-06-27 19:26:12,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1330 flow [2024-06-27 19:26:12,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 1260 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:12,509 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 953 flow [2024-06-27 19:26:12,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=953, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2024-06-27 19:26:12,509 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-06-27 19:26:12,509 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 953 flow [2024-06-27 19:26:12,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:12,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:26:12,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:12,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2040553880, now seen corresponding path program 2 times [2024-06-27 19:26:12,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:12,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747208625] [2024-06-27 19:26:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:12,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:12,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747208625] [2024-06-27 19:26:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747208625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:12,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:12,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:12,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516063603] [2024-06-27 19:26:12,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:12,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:12,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:12,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:12,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:12,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:12,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:13,077 INFO L124 PetriNetUnfolderBase]: 4681/6980 cut-off events. [2024-06-27 19:26:13,078 INFO L125 PetriNetUnfolderBase]: For 37988/38008 co-relation queries the response was YES. [2024-06-27 19:26:13,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29398 conditions, 6980 events. 4681/6980 cut-off events. For 37988/38008 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39556 event pairs, 1744 based on Foata normal form. 18/6991 useless extension candidates. Maximal degree in co-relation 29363. Up to 6324 conditions per place. [2024-06-27 19:26:13,122 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 95 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2024-06-27 19:26:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1284 flow [2024-06-27 19:26:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 19:26:13,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 19:26:13,124 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 953 flow. Second operand 5 states and 161 transitions. [2024-06-27 19:26:13,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1284 flow [2024-06-27 19:26:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1137 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:13,201 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 886 flow [2024-06-27 19:26:13,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=886, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-27 19:26:13,202 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2024-06-27 19:26:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 886 flow [2024-06-27 19:26:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:13,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:26:13,202 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554221, now seen corresponding path program 1 times [2024-06-27 19:26:13,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:13,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406272483] [2024-06-27 19:26:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:13,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406272483] [2024-06-27 19:26:13,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406272483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:13,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:13,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:13,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46130380] [2024-06-27 19:26:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:13,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:13,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:13,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 886 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:13,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:13,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:13,871 INFO L124 PetriNetUnfolderBase]: 4740/7036 cut-off events. [2024-06-27 19:26:13,871 INFO L125 PetriNetUnfolderBase]: For 41737/41757 co-relation queries the response was YES. [2024-06-27 19:26:13,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30075 conditions, 7036 events. 4740/7036 cut-off events. For 41737/41757 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39474 event pairs, 1735 based on Foata normal form. 17/7046 useless extension candidates. Maximal degree in co-relation 30040. Up to 6483 conditions per place. [2024-06-27 19:26:13,923 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 94 selfloop transitions, 31 changer transitions 0/134 dead transitions. [2024-06-27 19:26:13,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1293 flow [2024-06-27 19:26:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 19:26:13,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:26:13,933 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 886 flow. Second operand 5 states and 150 transitions. [2024-06-27 19:26:13,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1293 flow [2024-06-27 19:26:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 134 transitions, 1231 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:13,998 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1017 flow [2024-06-27 19:26:13,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1017, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-27 19:26:13,999 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-27 19:26:13,999 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1017 flow [2024-06-27 19:26:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:14,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:14,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:26:14,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:14,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1998559149, now seen corresponding path program 2 times [2024-06-27 19:26:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312083462] [2024-06-27 19:26:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:14,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:14,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:14,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312083462] [2024-06-27 19:26:14,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312083462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:14,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:14,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969501330] [2024-06-27 19:26:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:14,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:14,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:14,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:14,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:14,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:14,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:14,667 INFO L124 PetriNetUnfolderBase]: 4754/7037 cut-off events. [2024-06-27 19:26:14,668 INFO L125 PetriNetUnfolderBase]: For 50596/50619 co-relation queries the response was YES. [2024-06-27 19:26:14,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32364 conditions, 7037 events. 4754/7037 cut-off events. For 50596/50619 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39284 event pairs, 1749 based on Foata normal form. 19/7043 useless extension candidates. Maximal degree in co-relation 32327. Up to 6463 conditions per place. [2024-06-27 19:26:14,722 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 42 changer transitions 0/152 dead transitions. [2024-06-27 19:26:14,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1547 flow [2024-06-27 19:26:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 19:26:14,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:26:14,723 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1017 flow. Second operand 5 states and 154 transitions. [2024-06-27 19:26:14,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1547 flow [2024-06-27 19:26:14,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1504 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:14,806 INFO L231 Difference]: Finished difference. Result has 94 places, 131 transitions, 1242 flow [2024-06-27 19:26:14,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1242, PETRI_PLACES=94, PETRI_TRANSITIONS=131} [2024-06-27 19:26:14,806 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-06-27 19:26:14,806 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 131 transitions, 1242 flow [2024-06-27 19:26:14,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:14,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:14,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:26:14,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1825918293, now seen corresponding path program 1 times [2024-06-27 19:26:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:14,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70581710] [2024-06-27 19:26:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70581710] [2024-06-27 19:26:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70581710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:14,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:14,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:14,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148872258] [2024-06-27 19:26:14,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:14,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:14,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 131 transitions, 1242 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:14,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:14,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:14,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:15,553 INFO L124 PetriNetUnfolderBase]: 4802/7181 cut-off events. [2024-06-27 19:26:15,554 INFO L125 PetriNetUnfolderBase]: For 61748/61748 co-relation queries the response was YES. [2024-06-27 19:26:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35155 conditions, 7181 events. 4802/7181 cut-off events. For 61748/61748 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40606 event pairs, 1719 based on Foata normal form. 3/7175 useless extension candidates. Maximal degree in co-relation 35115. Up to 6525 conditions per place. [2024-06-27 19:26:15,624 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 149 selfloop transitions, 32 changer transitions 0/190 dead transitions. [2024-06-27 19:26:15,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 190 transitions, 2048 flow [2024-06-27 19:26:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 19:26:15,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:26:15,626 INFO L175 Difference]: Start difference. First operand has 94 places, 131 transitions, 1242 flow. Second operand 6 states and 186 transitions. [2024-06-27 19:26:15,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 190 transitions, 2048 flow [2024-06-27 19:26:15,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 190 transitions, 1968 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-06-27 19:26:15,705 INFO L231 Difference]: Finished difference. Result has 102 places, 151 transitions, 1449 flow [2024-06-27 19:26:15,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=102, PETRI_TRANSITIONS=151} [2024-06-27 19:26:15,706 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-27 19:26:15,706 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 151 transitions, 1449 flow [2024-06-27 19:26:15,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:15,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:15,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:26:15,707 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:15,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1998565101, now seen corresponding path program 2 times [2024-06-27 19:26:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544753628] [2024-06-27 19:26:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:15,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:15,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544753628] [2024-06-27 19:26:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544753628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:15,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:15,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896631867] [2024-06-27 19:26:15,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:15,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 151 transitions, 1449 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:15,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:15,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:15,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:16,353 INFO L124 PetriNetUnfolderBase]: 4839/7240 cut-off events. [2024-06-27 19:26:16,353 INFO L125 PetriNetUnfolderBase]: For 67912/67921 co-relation queries the response was YES. [2024-06-27 19:26:16,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36369 conditions, 7240 events. 4839/7240 cut-off events. For 67912/67921 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41079 event pairs, 1715 based on Foata normal form. 9/7242 useless extension candidates. Maximal degree in co-relation 36324. Up to 6597 conditions per place. [2024-06-27 19:26:16,407 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 158 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-27 19:26:16,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 2222 flow [2024-06-27 19:26:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 19:26:16,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151603498542274 [2024-06-27 19:26:16,408 INFO L175 Difference]: Start difference. First operand has 102 places, 151 transitions, 1449 flow. Second operand 7 states and 211 transitions. [2024-06-27 19:26:16,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 2222 flow [2024-06-27 19:26:16,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 2134 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:16,498 INFO L231 Difference]: Finished difference. Result has 109 places, 163 transitions, 1590 flow [2024-06-27 19:26:16,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1590, PETRI_PLACES=109, PETRI_TRANSITIONS=163} [2024-06-27 19:26:16,499 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-27 19:26:16,499 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 163 transitions, 1590 flow [2024-06-27 19:26:16,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:16,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:16,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:16,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:26:16,500 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:16,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1998357711, now seen corresponding path program 3 times [2024-06-27 19:26:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903935136] [2024-06-27 19:26:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:16,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:16,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903935136] [2024-06-27 19:26:16,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903935136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:16,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:16,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:16,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137634386] [2024-06-27 19:26:16,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:16,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:16,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:16,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:16,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 163 transitions, 1590 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:16,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:16,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:16,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:17,163 INFO L124 PetriNetUnfolderBase]: 4831/7229 cut-off events. [2024-06-27 19:26:17,163 INFO L125 PetriNetUnfolderBase]: For 76855/76855 co-relation queries the response was YES. [2024-06-27 19:26:17,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37340 conditions, 7229 events. 4831/7229 cut-off events. For 76855/76855 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40938 event pairs, 1720 based on Foata normal form. 3/7223 useless extension candidates. Maximal degree in co-relation 37292. Up to 6591 conditions per place. [2024-06-27 19:26:17,219 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 152 selfloop transitions, 31 changer transitions 0/192 dead transitions. [2024-06-27 19:26:17,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 192 transitions, 2139 flow [2024-06-27 19:26:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 19:26:17,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2024-06-27 19:26:17,220 INFO L175 Difference]: Start difference. First operand has 109 places, 163 transitions, 1590 flow. Second operand 5 states and 157 transitions. [2024-06-27 19:26:17,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 192 transitions, 2139 flow [2024-06-27 19:26:17,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 192 transitions, 2049 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:17,350 INFO L231 Difference]: Finished difference. Result has 111 places, 163 transitions, 1573 flow [2024-06-27 19:26:17,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1573, PETRI_PLACES=111, PETRI_TRANSITIONS=163} [2024-06-27 19:26:17,351 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-27 19:26:17,351 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 163 transitions, 1573 flow [2024-06-27 19:26:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:17,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:17,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:26:17,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:17,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1998573037, now seen corresponding path program 1 times [2024-06-27 19:26:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035366410] [2024-06-27 19:26:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:17,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:17,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035366410] [2024-06-27 19:26:17,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035366410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:17,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:17,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:17,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319246976] [2024-06-27 19:26:17,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:17,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:17,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:17,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:17,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 163 transitions, 1573 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:17,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:17,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:17,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:18,003 INFO L124 PetriNetUnfolderBase]: 4881/7298 cut-off events. [2024-06-27 19:26:18,003 INFO L125 PetriNetUnfolderBase]: For 84365/84371 co-relation queries the response was YES. [2024-06-27 19:26:18,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38168 conditions, 7298 events. 4881/7298 cut-off events. For 84365/84371 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 41356 event pairs, 1709 based on Foata normal form. 16/7307 useless extension candidates. Maximal degree in co-relation 38118. Up to 6672 conditions per place. [2024-06-27 19:26:18,057 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 166 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-27 19:26:18,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 2129 flow [2024-06-27 19:26:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 19:26:18,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-06-27 19:26:18,058 INFO L175 Difference]: Start difference. First operand has 111 places, 163 transitions, 1573 flow. Second operand 5 states and 153 transitions. [2024-06-27 19:26:18,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 2129 flow [2024-06-27 19:26:18,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 193 transitions, 2067 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:18,191 INFO L231 Difference]: Finished difference. Result has 112 places, 166 transitions, 1606 flow [2024-06-27 19:26:18,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1606, PETRI_PLACES=112, PETRI_TRANSITIONS=166} [2024-06-27 19:26:18,191 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-27 19:26:18,192 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 166 transitions, 1606 flow [2024-06-27 19:26:18,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:18,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:18,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:18,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:26:18,192 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:18,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1997772327, now seen corresponding path program 1 times [2024-06-27 19:26:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:18,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187963422] [2024-06-27 19:26:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187963422] [2024-06-27 19:26:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187963422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:18,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:18,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:26:18,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366876318] [2024-06-27 19:26:18,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:26:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:26:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:26:18,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:18,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 166 transitions, 1606 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:18,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:18,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:18,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:18,762 INFO L124 PetriNetUnfolderBase]: 4603/6896 cut-off events. [2024-06-27 19:26:18,762 INFO L125 PetriNetUnfolderBase]: For 99668/99700 co-relation queries the response was YES. [2024-06-27 19:26:18,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6896 events. 4603/6896 cut-off events. For 99668/99700 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 39683 event pairs, 1625 based on Foata normal form. 8/6769 useless extension candidates. Maximal degree in co-relation 37899. Up to 6211 conditions per place. [2024-06-27 19:26:18,816 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-06-27 19:26:18,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 1978 flow [2024-06-27 19:26:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:26:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:26:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 19:26:18,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-27 19:26:18,817 INFO L175 Difference]: Start difference. First operand has 112 places, 166 transitions, 1606 flow. Second operand 4 states and 122 transitions. [2024-06-27 19:26:18,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 1978 flow [2024-06-27 19:26:18,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 179 transitions, 1915 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:18,964 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 1625 flow [2024-06-27 19:26:18,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1625, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2024-06-27 19:26:18,965 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 62 predicate places. [2024-06-27 19:26:18,965 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 1625 flow [2024-06-27 19:26:18,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:18,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:18,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:18,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:26:18,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:18,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1301890499, now seen corresponding path program 1 times [2024-06-27 19:26:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:18,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480882668] [2024-06-27 19:26:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:18,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480882668] [2024-06-27 19:26:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480882668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:19,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:19,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300236212] [2024-06-27 19:26:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:19,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:19,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 1625 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:19,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:19,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:19,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:19,806 INFO L124 PetriNetUnfolderBase]: 5162/7712 cut-off events. [2024-06-27 19:26:19,806 INFO L125 PetriNetUnfolderBase]: For 104655/104678 co-relation queries the response was YES. [2024-06-27 19:26:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41852 conditions, 7712 events. 5162/7712 cut-off events. For 104655/104678 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44271 event pairs, 1717 based on Foata normal form. 22/7716 useless extension candidates. Maximal degree in co-relation 41799. Up to 6479 conditions per place. [2024-06-27 19:26:19,861 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 129 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-27 19:26:19,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 244 transitions, 2851 flow [2024-06-27 19:26:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-27 19:26:19,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-27 19:26:19,865 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 1625 flow. Second operand 9 states and 278 transitions. [2024-06-27 19:26:19,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 244 transitions, 2851 flow [2024-06-27 19:26:20,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 244 transitions, 2833 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:20,023 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 2171 flow [2024-06-27 19:26:20,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-06-27 19:26:20,023 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 73 predicate places. [2024-06-27 19:26:20,023 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 2171 flow [2024-06-27 19:26:20,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:20,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:20,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:20,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:26:20,024 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:20,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1167338017, now seen corresponding path program 2 times [2024-06-27 19:26:20,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:20,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058499252] [2024-06-27 19:26:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:20,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058499252] [2024-06-27 19:26:20,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058499252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:20,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:20,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922777173] [2024-06-27 19:26:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:20,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:20,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 2171 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:20,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:20,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:20,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:20,883 INFO L124 PetriNetUnfolderBase]: 5447/8161 cut-off events. [2024-06-27 19:26:20,884 INFO L125 PetriNetUnfolderBase]: For 128557/128577 co-relation queries the response was YES. [2024-06-27 19:26:20,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49027 conditions, 8161 events. 5447/8161 cut-off events. For 128557/128577 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 47199 event pairs, 1724 based on Foata normal form. 20/8174 useless extension candidates. Maximal degree in co-relation 48969. Up to 7040 conditions per place. [2024-06-27 19:26:20,954 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 182 selfloop transitions, 80 changer transitions 0/271 dead transitions. [2024-06-27 19:26:20,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 271 transitions, 3527 flow [2024-06-27 19:26:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-27 19:26:20,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-27 19:26:20,956 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 2171 flow. Second operand 7 states and 226 transitions. [2024-06-27 19:26:20,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 271 transitions, 3527 flow [2024-06-27 19:26:21,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 271 transitions, 3295 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:21,222 INFO L231 Difference]: Finished difference. Result has 131 places, 222 transitions, 2621 flow [2024-06-27 19:26:21,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=131, PETRI_TRANSITIONS=222} [2024-06-27 19:26:21,222 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-27 19:26:21,223 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 222 transitions, 2621 flow [2024-06-27 19:26:21,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:21,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:21,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:21,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:26:21,223 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:21,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1167327787, now seen corresponding path program 3 times [2024-06-27 19:26:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148357183] [2024-06-27 19:26:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:21,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148357183] [2024-06-27 19:26:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148357183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:21,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:21,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:21,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053370747] [2024-06-27 19:26:21,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:21,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:21,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:21,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:21,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 222 transitions, 2621 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:21,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:21,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:21,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:22,252 INFO L124 PetriNetUnfolderBase]: 5480/8215 cut-off events. [2024-06-27 19:26:22,253 INFO L125 PetriNetUnfolderBase]: For 141917/141939 co-relation queries the response was YES. [2024-06-27 19:26:22,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51145 conditions, 8215 events. 5480/8215 cut-off events. For 141917/141939 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47640 event pairs, 1722 based on Foata normal form. 22/8230 useless extension candidates. Maximal degree in co-relation 51083. Up to 7078 conditions per place. [2024-06-27 19:26:22,325 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 174 selfloop transitions, 95 changer transitions 0/278 dead transitions. [2024-06-27 19:26:22,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 278 transitions, 3696 flow [2024-06-27 19:26:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-06-27 19:26:22,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-06-27 19:26:22,327 INFO L175 Difference]: Start difference. First operand has 131 places, 222 transitions, 2621 flow. Second operand 8 states and 246 transitions. [2024-06-27 19:26:22,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 278 transitions, 3696 flow [2024-06-27 19:26:22,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 278 transitions, 3579 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:22,652 INFO L231 Difference]: Finished difference. Result has 139 places, 236 transitions, 3013 flow [2024-06-27 19:26:22,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=139, PETRI_TRANSITIONS=236} [2024-06-27 19:26:22,652 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2024-06-27 19:26:22,652 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 236 transitions, 3013 flow [2024-06-27 19:26:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:22,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:22,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:22,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:26:22,653 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:22,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1894796869, now seen corresponding path program 4 times [2024-06-27 19:26:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:22,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704795729] [2024-06-27 19:26:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:22,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:22,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:22,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704795729] [2024-06-27 19:26:22,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704795729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:22,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:22,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847088067] [2024-06-27 19:26:22,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:22,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:22,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:22,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:22,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:22,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 236 transitions, 3013 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:22,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:22,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:22,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:23,616 INFO L124 PetriNetUnfolderBase]: 5790/8677 cut-off events. [2024-06-27 19:26:23,616 INFO L125 PetriNetUnfolderBase]: For 164305/164327 co-relation queries the response was YES. [2024-06-27 19:26:23,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56001 conditions, 8677 events. 5790/8677 cut-off events. For 164305/164327 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50698 event pairs, 1726 based on Foata normal form. 22/8686 useless extension candidates. Maximal degree in co-relation 55935. Up to 7145 conditions per place. [2024-06-27 19:26:23,698 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 170 selfloop transitions, 148 changer transitions 0/327 dead transitions. [2024-06-27 19:26:23,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 327 transitions, 4621 flow [2024-06-27 19:26:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-06-27 19:26:23,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:26:23,699 INFO L175 Difference]: Start difference. First operand has 139 places, 236 transitions, 3013 flow. Second operand 9 states and 279 transitions. [2024-06-27 19:26:23,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 327 transitions, 4621 flow [2024-06-27 19:26:24,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 327 transitions, 4498 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:24,065 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3776 flow [2024-06-27 19:26:24,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3776, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2024-06-27 19:26:24,066 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-27 19:26:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3776 flow [2024-06-27 19:26:24,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:24,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:24,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:26:24,066 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:24,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash 766031489, now seen corresponding path program 1 times [2024-06-27 19:26:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926373757] [2024-06-27 19:26:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:24,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:24,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926373757] [2024-06-27 19:26:24,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926373757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:24,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:24,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:24,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811508101] [2024-06-27 19:26:24,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:24,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:24,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:24,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:24,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:24,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:24,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3776 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:24,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:24,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:25,085 INFO L124 PetriNetUnfolderBase]: 5928/8844 cut-off events. [2024-06-27 19:26:25,090 INFO L125 PetriNetUnfolderBase]: For 204726/204754 co-relation queries the response was YES. [2024-06-27 19:26:25,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62099 conditions, 8844 events. 5928/8844 cut-off events. For 204726/204754 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52071 event pairs, 1488 based on Foata normal form. 29/8840 useless extension candidates. Maximal degree in co-relation 62029. Up to 7108 conditions per place. [2024-06-27 19:26:25,185 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 229 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-27 19:26:25,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 321 transitions, 4898 flow [2024-06-27 19:26:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-27 19:26:25,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-27 19:26:25,188 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3776 flow. Second operand 6 states and 199 transitions. [2024-06-27 19:26:25,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 321 transitions, 4898 flow [2024-06-27 19:26:25,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 321 transitions, 4689 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:25,607 INFO L231 Difference]: Finished difference. Result has 150 places, 279 transitions, 3851 flow [2024-06-27 19:26:25,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3851, PETRI_PLACES=150, PETRI_TRANSITIONS=279} [2024-06-27 19:26:25,607 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-27 19:26:25,608 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 279 transitions, 3851 flow [2024-06-27 19:26:25,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:25,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:25,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:25,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:26:25,608 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:25,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -91723291, now seen corresponding path program 2 times [2024-06-27 19:26:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:25,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207818696] [2024-06-27 19:26:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:25,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207818696] [2024-06-27 19:26:25,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207818696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:25,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:25,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396042396] [2024-06-27 19:26:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:25,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:25,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:25,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 279 transitions, 3851 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:25,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:25,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:25,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:26,742 INFO L124 PetriNetUnfolderBase]: 6071/9042 cut-off events. [2024-06-27 19:26:26,742 INFO L125 PetriNetUnfolderBase]: For 220392/220420 co-relation queries the response was YES. [2024-06-27 19:26:26,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64188 conditions, 9042 events. 6071/9042 cut-off events. For 220392/220420 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53310 event pairs, 1770 based on Foata normal form. 29/9038 useless extension candidates. Maximal degree in co-relation 64116. Up to 7781 conditions per place. [2024-06-27 19:26:26,830 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 226 selfloop transitions, 68 changer transitions 0/315 dead transitions. [2024-06-27 19:26:26,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 315 transitions, 4783 flow [2024-06-27 19:26:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 19:26:26,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-27 19:26:26,832 INFO L175 Difference]: Start difference. First operand has 150 places, 279 transitions, 3851 flow. Second operand 6 states and 191 transitions. [2024-06-27 19:26:26,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 315 transitions, 4783 flow [2024-06-27 19:26:27,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 315 transitions, 4635 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:27,229 INFO L231 Difference]: Finished difference. Result has 154 places, 282 transitions, 3921 flow [2024-06-27 19:26:27,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3921, PETRI_PLACES=154, PETRI_TRANSITIONS=282} [2024-06-27 19:26:27,229 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-06-27 19:26:27,230 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 282 transitions, 3921 flow [2024-06-27 19:26:27,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:27,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:27,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:27,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:26:27,230 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:27,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1819543111, now seen corresponding path program 3 times [2024-06-27 19:26:27,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:27,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430040239] [2024-06-27 19:26:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:27,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430040239] [2024-06-27 19:26:27,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430040239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:27,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700156773] [2024-06-27 19:26:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:27,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:27,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:27,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 282 transitions, 3921 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:27,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:27,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:27,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:28,347 INFO L124 PetriNetUnfolderBase]: 6145/9170 cut-off events. [2024-06-27 19:26:28,347 INFO L125 PetriNetUnfolderBase]: For 226356/226384 co-relation queries the response was YES. [2024-06-27 19:26:28,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64383 conditions, 9170 events. 6145/9170 cut-off events. For 226356/226384 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54289 event pairs, 1461 based on Foata normal form. 29/9179 useless extension candidates. Maximal degree in co-relation 64309. Up to 7743 conditions per place. [2024-06-27 19:26:28,587 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 246 selfloop transitions, 55 changer transitions 0/322 dead transitions. [2024-06-27 19:26:28,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 322 transitions, 4681 flow [2024-06-27 19:26:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-27 19:26:28,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:26:28,589 INFO L175 Difference]: Start difference. First operand has 154 places, 282 transitions, 3921 flow. Second operand 6 states and 196 transitions. [2024-06-27 19:26:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 322 transitions, 4681 flow [2024-06-27 19:26:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 322 transitions, 4525 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:28,922 INFO L231 Difference]: Finished difference. Result has 156 places, 284 transitions, 3941 flow [2024-06-27 19:26:28,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3941, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2024-06-27 19:26:28,925 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2024-06-27 19:26:28,925 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 3941 flow [2024-06-27 19:26:28,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:28,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:28,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:28,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:26:28,926 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:28,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1703905575, now seen corresponding path program 1 times [2024-06-27 19:26:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689277708] [2024-06-27 19:26:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:29,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:29,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689277708] [2024-06-27 19:26:29,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689277708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:29,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:29,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975698309] [2024-06-27 19:26:29,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:29,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:29,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:29,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 3941 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:29,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:29,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:29,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:30,262 INFO L124 PetriNetUnfolderBase]: 6303/9333 cut-off events. [2024-06-27 19:26:30,263 INFO L125 PetriNetUnfolderBase]: For 233579/233607 co-relation queries the response was YES. [2024-06-27 19:26:30,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 9333 events. 6303/9333 cut-off events. For 233579/233607 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54700 event pairs, 1800 based on Foata normal form. 22/9336 useless extension candidates. Maximal degree in co-relation 65796. Up to 8365 conditions per place. [2024-06-27 19:26:30,380 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 243 selfloop transitions, 62 changer transitions 0/314 dead transitions. [2024-06-27 19:26:30,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 314 transitions, 4725 flow [2024-06-27 19:26:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 19:26:30,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-27 19:26:30,382 INFO L175 Difference]: Start difference. First operand has 156 places, 284 transitions, 3941 flow. Second operand 6 states and 185 transitions. [2024-06-27 19:26:30,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 314 transitions, 4725 flow [2024-06-27 19:26:30,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 314 transitions, 4593 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:30,900 INFO L231 Difference]: Finished difference. Result has 158 places, 284 transitions, 3942 flow [2024-06-27 19:26:30,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3942, PETRI_PLACES=158, PETRI_TRANSITIONS=284} [2024-06-27 19:26:30,900 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-27 19:26:30,900 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 284 transitions, 3942 flow [2024-06-27 19:26:30,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:30,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:30,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:30,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:26:30,901 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:30,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1037868265, now seen corresponding path program 1 times [2024-06-27 19:26:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:30,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418725765] [2024-06-27 19:26:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:30,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:30,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418725765] [2024-06-27 19:26:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418725765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:30,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879111633] [2024-06-27 19:26:30,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:30,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:31,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:31,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 284 transitions, 3942 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:31,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:31,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:31,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:32,184 INFO L124 PetriNetUnfolderBase]: 6570/9743 cut-off events. [2024-06-27 19:26:32,185 INFO L125 PetriNetUnfolderBase]: For 262301/262329 co-relation queries the response was YES. [2024-06-27 19:26:32,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69017 conditions, 9743 events. 6570/9743 cut-off events. For 262301/262329 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57608 event pairs, 1497 based on Foata normal form. 40/9763 useless extension candidates. Maximal degree in co-relation 68941. Up to 8192 conditions per place. [2024-06-27 19:26:32,299 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 255 selfloop transitions, 69 changer transitions 0/333 dead transitions. [2024-06-27 19:26:32,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 333 transitions, 5074 flow [2024-06-27 19:26:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-27 19:26:32,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:26:32,300 INFO L175 Difference]: Start difference. First operand has 158 places, 284 transitions, 3942 flow. Second operand 6 states and 196 transitions. [2024-06-27 19:26:32,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 333 transitions, 5074 flow [2024-06-27 19:26:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 333 transitions, 4908 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:32,743 INFO L231 Difference]: Finished difference. Result has 159 places, 290 transitions, 4068 flow [2024-06-27 19:26:32,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4068, PETRI_PLACES=159, PETRI_TRANSITIONS=290} [2024-06-27 19:26:32,744 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-27 19:26:32,744 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 290 transitions, 4068 flow [2024-06-27 19:26:32,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:32,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:32,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:32,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:26:32,745 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:32,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:32,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1030249705, now seen corresponding path program 2 times [2024-06-27 19:26:32,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:32,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327993678] [2024-06-27 19:26:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:32,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:32,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327993678] [2024-06-27 19:26:32,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327993678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:32,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:32,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:32,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789511571] [2024-06-27 19:26:32,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:32,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:32,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:32,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 290 transitions, 4068 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:32,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:32,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:32,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:33,937 INFO L124 PetriNetUnfolderBase]: 6695/9918 cut-off events. [2024-06-27 19:26:33,937 INFO L125 PetriNetUnfolderBase]: For 286866/286894 co-relation queries the response was YES. [2024-06-27 19:26:34,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71866 conditions, 9918 events. 6695/9918 cut-off events. For 286866/286894 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58755 event pairs, 1861 based on Foata normal form. 40/9938 useless extension candidates. Maximal degree in co-relation 71789. Up to 8803 conditions per place. [2024-06-27 19:26:34,051 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 253 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-27 19:26:34,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 327 transitions, 4988 flow [2024-06-27 19:26:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 19:26:34,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-27 19:26:34,054 INFO L175 Difference]: Start difference. First operand has 159 places, 290 transitions, 4068 flow. Second operand 6 states and 188 transitions. [2024-06-27 19:26:34,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 327 transitions, 4988 flow [2024-06-27 19:26:34,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 327 transitions, 4824 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:34,654 INFO L231 Difference]: Finished difference. Result has 163 places, 293 transitions, 4125 flow [2024-06-27 19:26:34,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4125, PETRI_PLACES=163, PETRI_TRANSITIONS=293} [2024-06-27 19:26:34,655 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-27 19:26:34,655 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 293 transitions, 4125 flow [2024-06-27 19:26:34,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:34,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:34,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:34,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:26:34,656 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:34,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1027102702, now seen corresponding path program 1 times [2024-06-27 19:26:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:34,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967653103] [2024-06-27 19:26:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:34,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:34,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967653103] [2024-06-27 19:26:34,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967653103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:34,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:34,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372897098] [2024-06-27 19:26:34,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:34,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:34,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 293 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:34,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:34,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:34,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:35,906 INFO L124 PetriNetUnfolderBase]: 6746/10012 cut-off events. [2024-06-27 19:26:35,906 INFO L125 PetriNetUnfolderBase]: For 286348/286360 co-relation queries the response was YES. [2024-06-27 19:26:35,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72052 conditions, 10012 events. 6746/10012 cut-off events. For 286348/286360 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59103 event pairs, 1815 based on Foata normal form. 11/10006 useless extension candidates. Maximal degree in co-relation 71973. Up to 8402 conditions per place. [2024-06-27 19:26:36,023 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 174 changer transitions 0/355 dead transitions. [2024-06-27 19:26:36,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 355 transitions, 5697 flow [2024-06-27 19:26:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-27 19:26:36,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-27 19:26:36,024 INFO L175 Difference]: Start difference. First operand has 163 places, 293 transitions, 4125 flow. Second operand 9 states and 278 transitions. [2024-06-27 19:26:36,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 355 transitions, 5697 flow [2024-06-27 19:26:36,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 355 transitions, 5538 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:36,711 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4623 flow [2024-06-27 19:26:36,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-27 19:26:36,712 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-27 19:26:36,712 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4623 flow [2024-06-27 19:26:36,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:36,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:36,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:36,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:26:36,713 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:36,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:36,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2091908333, now seen corresponding path program 2 times [2024-06-27 19:26:36,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:36,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159427790] [2024-06-27 19:26:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:36,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159427790] [2024-06-27 19:26:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159427790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:36,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:36,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:36,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687596020] [2024-06-27 19:26:36,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:36,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:36,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:36,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:36,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:36,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4623 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:36,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:36,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:36,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:38,041 INFO L124 PetriNetUnfolderBase]: 6739/9989 cut-off events. [2024-06-27 19:26:38,041 INFO L125 PetriNetUnfolderBase]: For 306710/306722 co-relation queries the response was YES. [2024-06-27 19:26:38,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73917 conditions, 9989 events. 6739/9989 cut-off events. For 306710/306722 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59150 event pairs, 1825 based on Foata normal form. 7/9980 useless extension candidates. Maximal degree in co-relation 73835. Up to 8972 conditions per place. [2024-06-27 19:26:38,150 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 257 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-27 19:26:38,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 331 transitions, 5331 flow [2024-06-27 19:26:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 19:26:38,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:26:38,152 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4623 flow. Second operand 6 states and 182 transitions. [2024-06-27 19:26:38,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 331 transitions, 5331 flow [2024-06-27 19:26:38,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 331 transitions, 4821 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:38,760 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4252 flow [2024-06-27 19:26:38,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4252, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-27 19:26:38,761 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-27 19:26:38,761 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4252 flow [2024-06-27 19:26:38,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:38,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:38,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:38,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:26:38,762 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:38,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1827418228, now seen corresponding path program 2 times [2024-06-27 19:26:38,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:38,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628718292] [2024-06-27 19:26:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:38,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:38,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:38,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628718292] [2024-06-27 19:26:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628718292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:38,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:38,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15037803] [2024-06-27 19:26:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:38,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:38,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4252 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:38,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:38,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:38,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:40,105 INFO L124 PetriNetUnfolderBase]: 6791/10103 cut-off events. [2024-06-27 19:26:40,106 INFO L125 PetriNetUnfolderBase]: For 312663/312685 co-relation queries the response was YES. [2024-06-27 19:26:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73678 conditions, 10103 events. 6791/10103 cut-off events. For 312663/312685 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59927 event pairs, 1786 based on Foata normal form. 22/10118 useless extension candidates. Maximal degree in co-relation 73595. Up to 8847 conditions per place. [2024-06-27 19:26:40,222 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 244 selfloop transitions, 101 changer transitions 0/354 dead transitions. [2024-06-27 19:26:40,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 354 transitions, 5471 flow [2024-06-27 19:26:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-27 19:26:40,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301020408163265 [2024-06-27 19:26:40,224 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4252 flow. Second operand 8 states and 247 transitions. [2024-06-27 19:26:40,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 354 transitions, 5471 flow [2024-06-27 19:26:40,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 354 transitions, 5243 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:40,928 INFO L231 Difference]: Finished difference. Result has 172 places, 312 transitions, 4379 flow [2024-06-27 19:26:40,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4379, PETRI_PLACES=172, PETRI_TRANSITIONS=312} [2024-06-27 19:26:40,929 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-27 19:26:40,929 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 312 transitions, 4379 flow [2024-06-27 19:26:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:40,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:26:40,929 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:40,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1811538478, now seen corresponding path program 3 times [2024-06-27 19:26:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:40,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966528345] [2024-06-27 19:26:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966528345] [2024-06-27 19:26:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966528345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:41,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:41,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971786509] [2024-06-27 19:26:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:41,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:41,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:41,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 312 transitions, 4379 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:41,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:41,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:41,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:42,254 INFO L124 PetriNetUnfolderBase]: 6770/10079 cut-off events. [2024-06-27 19:26:42,255 INFO L125 PetriNetUnfolderBase]: For 309382/309404 co-relation queries the response was YES. [2024-06-27 19:26:42,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73252 conditions, 10079 events. 6770/10079 cut-off events. For 309382/309404 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59868 event pairs, 1781 based on Foata normal form. 22/10094 useless extension candidates. Maximal degree in co-relation 73169. Up to 8831 conditions per place. [2024-06-27 19:26:42,363 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 248 selfloop transitions, 98 changer transitions 0/355 dead transitions. [2024-06-27 19:26:42,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 355 transitions, 5422 flow [2024-06-27 19:26:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-27 19:26:42,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-06-27 19:26:42,365 INFO L175 Difference]: Start difference. First operand has 172 places, 312 transitions, 4379 flow. Second operand 7 states and 225 transitions. [2024-06-27 19:26:42,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 355 transitions, 5422 flow [2024-06-27 19:26:43,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 355 transitions, 5207 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:43,085 INFO L231 Difference]: Finished difference. Result has 173 places, 312 transitions, 4385 flow [2024-06-27 19:26:43,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4385, PETRI_PLACES=173, PETRI_TRANSITIONS=312} [2024-06-27 19:26:43,086 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-27 19:26:43,086 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 312 transitions, 4385 flow [2024-06-27 19:26:43,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:43,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:43,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:43,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:26:43,087 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:43,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:43,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1827748905, now seen corresponding path program 3 times [2024-06-27 19:26:43,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:43,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138577127] [2024-06-27 19:26:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:43,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138577127] [2024-06-27 19:26:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138577127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:43,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:43,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816583185] [2024-06-27 19:26:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:43,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:43,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:43,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 312 transitions, 4385 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:43,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:43,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:44,439 INFO L124 PetriNetUnfolderBase]: 6856/10183 cut-off events. [2024-06-27 19:26:44,439 INFO L125 PetriNetUnfolderBase]: For 321347/321369 co-relation queries the response was YES. [2024-06-27 19:26:44,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73850 conditions, 10183 events. 6856/10183 cut-off events. For 321347/321369 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60702 event pairs, 1430 based on Foata normal form. 36/10212 useless extension candidates. Maximal degree in co-relation 73767. Up to 8883 conditions per place. [2024-06-27 19:26:44,550 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 288 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-27 19:26:44,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 352 transitions, 5227 flow [2024-06-27 19:26:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-27 19:26:44,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-27 19:26:44,580 INFO L175 Difference]: Start difference. First operand has 173 places, 312 transitions, 4385 flow. Second operand 6 states and 193 transitions. [2024-06-27 19:26:44,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 352 transitions, 5227 flow [2024-06-27 19:26:45,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 352 transitions, 4960 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:45,300 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 4292 flow [2024-06-27 19:26:45,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4292, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-06-27 19:26:45,301 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-27 19:26:45,301 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 4292 flow [2024-06-27 19:26:45,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:45,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:45,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:45,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:26:45,302 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:45,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1827410292, now seen corresponding path program 1 times [2024-06-27 19:26:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:45,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234435678] [2024-06-27 19:26:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:45,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234435678] [2024-06-27 19:26:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234435678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:45,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:45,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958284366] [2024-06-27 19:26:45,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:45,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:45,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:45,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:45,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:45,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:45,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:46,593 INFO L124 PetriNetUnfolderBase]: 6945/10317 cut-off events. [2024-06-27 19:26:46,593 INFO L125 PetriNetUnfolderBase]: For 314655/314677 co-relation queries the response was YES. [2024-06-27 19:26:46,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74640 conditions, 10317 events. 6945/10317 cut-off events. For 314655/314677 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61246 event pairs, 1787 based on Foata normal form. 28/10338 useless extension candidates. Maximal degree in co-relation 74557. Up to 9347 conditions per place. [2024-06-27 19:26:46,702 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 294 selfloop transitions, 39 changer transitions 0/342 dead transitions. [2024-06-27 19:26:46,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 342 transitions, 5184 flow [2024-06-27 19:26:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 19:26:46,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:26:46,703 INFO L175 Difference]: Start difference. First operand has 171 places, 314 transitions, 4292 flow. Second operand 6 states and 179 transitions. [2024-06-27 19:26:46,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 342 transitions, 5184 flow [2024-06-27 19:26:47,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 342 transitions, 5056 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:47,352 INFO L231 Difference]: Finished difference. Result has 173 places, 317 transitions, 4334 flow [2024-06-27 19:26:47,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4334, PETRI_PLACES=173, PETRI_TRANSITIONS=317} [2024-06-27 19:26:47,352 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-27 19:26:47,353 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 317 transitions, 4334 flow [2024-06-27 19:26:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:47,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:47,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:47,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:26:47,353 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:47,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1528821840, now seen corresponding path program 1 times [2024-06-27 19:26:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:47,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211981674] [2024-06-27 19:26:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:47,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:47,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211981674] [2024-06-27 19:26:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211981674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:47,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:47,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:26:47,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259014392] [2024-06-27 19:26:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:47,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:26:47,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:26:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:26:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:26:47,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 317 transitions, 4334 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:47,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:47,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:26:47,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:48,524 INFO L124 PetriNetUnfolderBase]: 6600/9829 cut-off events. [2024-06-27 19:26:48,524 INFO L125 PetriNetUnfolderBase]: For 342021/342085 co-relation queries the response was YES. [2024-06-27 19:26:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 9829 events. 6600/9829 cut-off events. For 342021/342085 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59017 event pairs, 1640 based on Foata normal form. 13/9638 useless extension candidates. Maximal degree in co-relation 73784. Up to 8827 conditions per place. [2024-06-27 19:26:48,632 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 273 selfloop transitions, 33 changer transitions 0/332 dead transitions. [2024-06-27 19:26:48,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 332 transitions, 4984 flow [2024-06-27 19:26:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 19:26:48,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:26:48,633 INFO L175 Difference]: Start difference. First operand has 173 places, 317 transitions, 4334 flow. Second operand 5 states and 150 transitions. [2024-06-27 19:26:48,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 332 transitions, 4984 flow [2024-06-27 19:26:49,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 332 transitions, 4856 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:49,281 INFO L231 Difference]: Finished difference. Result has 174 places, 317 transitions, 4290 flow [2024-06-27 19:26:49,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4290, PETRI_PLACES=174, PETRI_TRANSITIONS=317} [2024-06-27 19:26:49,282 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-27 19:26:49,282 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 317 transitions, 4290 flow [2024-06-27 19:26:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:49,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:49,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:49,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:26:49,282 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:49,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:49,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1451686352, now seen corresponding path program 4 times [2024-06-27 19:26:49,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:49,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547647118] [2024-06-27 19:26:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:49,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:49,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:49,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547647118] [2024-06-27 19:26:49,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547647118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:49,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:49,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693983228] [2024-06-27 19:26:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:49,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:49,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 317 transitions, 4290 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:49,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:49,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:49,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:50,623 INFO L124 PetriNetUnfolderBase]: 7008/10367 cut-off events. [2024-06-27 19:26:50,623 INFO L125 PetriNetUnfolderBase]: For 342363/342369 co-relation queries the response was YES. [2024-06-27 19:26:50,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75993 conditions, 10367 events. 7008/10367 cut-off events. For 342363/342369 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61143 event pairs, 1924 based on Foata normal form. 4/10336 useless extension candidates. Maximal degree in co-relation 75908. Up to 8445 conditions per place. [2024-06-27 19:26:50,739 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 213 changer transitions 0/394 dead transitions. [2024-06-27 19:26:50,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 394 transitions, 6179 flow [2024-06-27 19:26:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-27 19:26:50,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501457725947521 [2024-06-27 19:26:50,747 INFO L175 Difference]: Start difference. First operand has 174 places, 317 transitions, 4290 flow. Second operand 7 states and 223 transitions. [2024-06-27 19:26:50,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 394 transitions, 6179 flow [2024-06-27 19:26:51,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 394 transitions, 6095 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:51,377 INFO L231 Difference]: Finished difference. Result has 179 places, 352 transitions, 5392 flow [2024-06-27 19:26:51,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5392, PETRI_PLACES=179, PETRI_TRANSITIONS=352} [2024-06-27 19:26:51,378 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 127 predicate places. [2024-06-27 19:26:51,378 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 352 transitions, 5392 flow [2024-06-27 19:26:51,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:51,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:51,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:51,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:26:51,378 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:51,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash 571016720, now seen corresponding path program 5 times [2024-06-27 19:26:51,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273021395] [2024-06-27 19:26:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:51,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273021395] [2024-06-27 19:26:51,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273021395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:51,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:51,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:51,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151643592] [2024-06-27 19:26:51,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:51,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:51,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:51,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:51,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 352 transitions, 5392 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:51,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:51,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:51,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:52,804 INFO L124 PetriNetUnfolderBase]: 7000/10386 cut-off events. [2024-06-27 19:26:52,804 INFO L125 PetriNetUnfolderBase]: For 366779/366801 co-relation queries the response was YES. [2024-06-27 19:26:52,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81362 conditions, 10386 events. 7000/10386 cut-off events. For 366779/366801 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61786 event pairs, 1790 based on Foata normal form. 19/10398 useless extension candidates. Maximal degree in co-relation 81274. Up to 9378 conditions per place. [2024-06-27 19:26:52,929 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 325 selfloop transitions, 63 changer transitions 0/397 dead transitions. [2024-06-27 19:26:52,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 6422 flow [2024-06-27 19:26:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 19:26:52,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-27 19:26:52,930 INFO L175 Difference]: Start difference. First operand has 179 places, 352 transitions, 5392 flow. Second operand 8 states and 241 transitions. [2024-06-27 19:26:52,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 6422 flow [2024-06-27 19:26:53,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 397 transitions, 6238 flow, removed 92 selfloop flow, removed 0 redundant places. [2024-06-27 19:26:53,936 INFO L231 Difference]: Finished difference. Result has 188 places, 357 transitions, 5446 flow [2024-06-27 19:26:53,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=188, PETRI_TRANSITIONS=357} [2024-06-27 19:26:53,936 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-27 19:26:53,936 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 357 transitions, 5446 flow [2024-06-27 19:26:53,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:53,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:53,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:53,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:26:53,937 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:53,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash 770704460, now seen corresponding path program 6 times [2024-06-27 19:26:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:53,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697612468] [2024-06-27 19:26:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697612468] [2024-06-27 19:26:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697612468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:53,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:53,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:53,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126235405] [2024-06-27 19:26:53,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:53,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:54,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:54,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 357 transitions, 5446 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:54,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:54,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:54,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:55,311 INFO L124 PetriNetUnfolderBase]: 7079/10512 cut-off events. [2024-06-27 19:26:55,311 INFO L125 PetriNetUnfolderBase]: For 370125/370147 co-relation queries the response was YES. [2024-06-27 19:26:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81543 conditions, 10512 events. 7079/10512 cut-off events. For 370125/370147 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 62470 event pairs, 1782 based on Foata normal form. 19/10518 useless extension candidates. Maximal degree in co-relation 81451. Up to 8881 conditions per place. [2024-06-27 19:26:55,430 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 229 selfloop transitions, 181 changer transitions 0/419 dead transitions. [2024-06-27 19:26:55,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 419 transitions, 7112 flow [2024-06-27 19:26:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-27 19:26:55,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454081632653061 [2024-06-27 19:26:55,431 INFO L175 Difference]: Start difference. First operand has 188 places, 357 transitions, 5446 flow. Second operand 8 states and 253 transitions. [2024-06-27 19:26:55,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 419 transitions, 7112 flow [2024-06-27 19:26:56,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 419 transitions, 6914 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:56,232 INFO L231 Difference]: Finished difference. Result has 194 places, 373 transitions, 5940 flow [2024-06-27 19:26:56,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5940, PETRI_PLACES=194, PETRI_TRANSITIONS=373} [2024-06-27 19:26:56,233 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-06-27 19:26:56,233 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 373 transitions, 5940 flow [2024-06-27 19:26:56,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:56,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:56,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:56,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:26:56,234 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:56,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:56,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1019570718, now seen corresponding path program 7 times [2024-06-27 19:26:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760514555] [2024-06-27 19:26:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:56,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:56,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760514555] [2024-06-27 19:26:56,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760514555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:56,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:56,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:56,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423551047] [2024-06-27 19:26:56,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:56,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:56,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:56,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:56,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 373 transitions, 5940 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:56,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:56,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:56,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:57,619 INFO L124 PetriNetUnfolderBase]: 7057/10484 cut-off events. [2024-06-27 19:26:57,619 INFO L125 PetriNetUnfolderBase]: For 389286/389308 co-relation queries the response was YES. [2024-06-27 19:26:57,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82959 conditions, 10484 events. 7057/10484 cut-off events. For 389286/389308 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62380 event pairs, 1782 based on Foata normal form. 22/10493 useless extension candidates. Maximal degree in co-relation 82864. Up to 8864 conditions per place. [2024-06-27 19:26:57,744 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 237 selfloop transitions, 177 changer transitions 0/423 dead transitions. [2024-06-27 19:26:57,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 423 transitions, 7424 flow [2024-06-27 19:26:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-27 19:26:57,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 19:26:57,745 INFO L175 Difference]: Start difference. First operand has 194 places, 373 transitions, 5940 flow. Second operand 9 states and 280 transitions. [2024-06-27 19:26:57,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 423 transitions, 7424 flow [2024-06-27 19:26:58,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 423 transitions, 7118 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:58,652 INFO L231 Difference]: Finished difference. Result has 199 places, 373 transitions, 6000 flow [2024-06-27 19:26:58,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=199, PETRI_TRANSITIONS=373} [2024-06-27 19:26:58,652 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 147 predicate places. [2024-06-27 19:26:58,652 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 373 transitions, 6000 flow [2024-06-27 19:26:58,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:58,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:58,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:58,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:26:58,653 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:26:58,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1148724974, now seen corresponding path program 8 times [2024-06-27 19:26:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432619382] [2024-06-27 19:26:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432619382] [2024-06-27 19:26:58,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432619382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:58,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:58,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:58,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189666360] [2024-06-27 19:26:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:58,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:58,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:58,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:26:58,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 373 transitions, 6000 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:58,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:58,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:26:58,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:00,025 INFO L124 PetriNetUnfolderBase]: 7044/10466 cut-off events. [2024-06-27 19:27:00,025 INFO L125 PetriNetUnfolderBase]: For 403391/403407 co-relation queries the response was YES. [2024-06-27 19:27:00,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 10466 events. 7044/10466 cut-off events. For 403391/403407 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62222 event pairs, 1800 based on Foata normal form. 15/10467 useless extension candidates. Maximal degree in co-relation 83260. Up to 8854 conditions per place. [2024-06-27 19:27:00,158 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 231 selfloop transitions, 177 changer transitions 0/417 dead transitions. [2024-06-27 19:27:00,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 417 transitions, 7351 flow [2024-06-27 19:27:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-27 19:27:00,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-27 19:27:00,159 INFO L175 Difference]: Start difference. First operand has 199 places, 373 transitions, 6000 flow. Second operand 7 states and 226 transitions. [2024-06-27 19:27:00,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 417 transitions, 7351 flow [2024-06-27 19:27:01,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 417 transitions, 7044 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:01,037 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 6295 flow [2024-06-27 19:27:01,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6295, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-06-27 19:27:01,038 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2024-06-27 19:27:01,038 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 6295 flow [2024-06-27 19:27:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:01,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:01,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:27:01,038 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:01,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1390826468, now seen corresponding path program 2 times [2024-06-27 19:27:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945124175] [2024-06-27 19:27:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:01,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:01,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945124175] [2024-06-27 19:27:01,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945124175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:01,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:01,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956553805] [2024-06-27 19:27:01,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:01,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:01,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:01,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:01,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:01,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 6295 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:01,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:01,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:01,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:02,455 INFO L124 PetriNetUnfolderBase]: 7115/10563 cut-off events. [2024-06-27 19:27:02,455 INFO L125 PetriNetUnfolderBase]: For 433050/433072 co-relation queries the response was YES. [2024-06-27 19:27:02,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85775 conditions, 10563 events. 7115/10563 cut-off events. For 433050/433072 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 62775 event pairs, 1803 based on Foata normal form. 28/10578 useless extension candidates. Maximal degree in co-relation 85676. Up to 9601 conditions per place. [2024-06-27 19:27:02,584 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 45 changer transitions 0/408 dead transitions. [2024-06-27 19:27:02,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 408 transitions, 7423 flow [2024-06-27 19:27:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 19:27:02,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:27:02,585 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 6295 flow. Second operand 6 states and 182 transitions. [2024-06-27 19:27:02,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 408 transitions, 7423 flow [2024-06-27 19:27:03,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 408 transitions, 7182 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:03,585 INFO L231 Difference]: Finished difference. Result has 205 places, 379 transitions, 6237 flow [2024-06-27 19:27:03,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6237, PETRI_PLACES=205, PETRI_TRANSITIONS=379} [2024-06-27 19:27:03,585 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2024-06-27 19:27:03,585 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 379 transitions, 6237 flow [2024-06-27 19:27:03,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:03,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:03,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:03,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:27:03,586 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:03,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 778330956, now seen corresponding path program 3 times [2024-06-27 19:27:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:03,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305525845] [2024-06-27 19:27:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:03,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:03,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:03,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305525845] [2024-06-27 19:27:03,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305525845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:03,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:03,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215306691] [2024-06-27 19:27:03,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:03,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:03,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 379 transitions, 6237 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:03,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:03,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:03,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:05,047 INFO L124 PetriNetUnfolderBase]: 7217/10701 cut-off events. [2024-06-27 19:27:05,047 INFO L125 PetriNetUnfolderBase]: For 460262/460284 co-relation queries the response was YES. [2024-06-27 19:27:05,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87315 conditions, 10701 events. 7217/10701 cut-off events. For 460262/460284 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 63565 event pairs, 1784 based on Foata normal form. 28/10716 useless extension candidates. Maximal degree in co-relation 87215. Up to 9520 conditions per place. [2024-06-27 19:27:05,184 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 55 changer transitions 0/418 dead transitions. [2024-06-27 19:27:05,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 418 transitions, 7547 flow [2024-06-27 19:27:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 19:27:05,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:27:05,185 INFO L175 Difference]: Start difference. First operand has 205 places, 379 transitions, 6237 flow. Second operand 6 states and 186 transitions. [2024-06-27 19:27:05,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 418 transitions, 7547 flow [2024-06-27 19:27:06,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 418 transitions, 7280 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:06,266 INFO L231 Difference]: Finished difference. Result has 206 places, 384 transitions, 6222 flow [2024-06-27 19:27:06,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6222, PETRI_PLACES=206, PETRI_TRANSITIONS=384} [2024-06-27 19:27:06,266 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-27 19:27:06,266 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 384 transitions, 6222 flow [2024-06-27 19:27:06,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:06,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:06,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:06,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:27:06,267 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:06,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash -8798344, now seen corresponding path program 2 times [2024-06-27 19:27:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:06,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293293647] [2024-06-27 19:27:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:06,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:06,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293293647] [2024-06-27 19:27:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293293647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:06,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:06,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:27:06,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632303930] [2024-06-27 19:27:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:06,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:27:06,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:27:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:27:06,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:27:06,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 384 transitions, 6222 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:06,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:06,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:27:06,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:07,680 INFO L124 PetriNetUnfolderBase]: 6909/10262 cut-off events. [2024-06-27 19:27:07,680 INFO L125 PetriNetUnfolderBase]: For 499309/499373 co-relation queries the response was YES. [2024-06-27 19:27:07,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86576 conditions, 10262 events. 6909/10262 cut-off events. For 499309/499373 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61717 event pairs, 1686 based on Foata normal form. 13/10067 useless extension candidates. Maximal degree in co-relation 86476. Up to 9206 conditions per place. [2024-06-27 19:27:07,804 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 327 selfloop transitions, 48 changer transitions 0/402 dead transitions. [2024-06-27 19:27:07,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 402 transitions, 7233 flow [2024-06-27 19:27:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:27:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:27:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 19:27:07,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:27:07,806 INFO L175 Difference]: Start difference. First operand has 206 places, 384 transitions, 6222 flow. Second operand 5 states and 150 transitions. [2024-06-27 19:27:07,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 402 transitions, 7233 flow [2024-06-27 19:27:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 402 transitions, 7106 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 19:27:08,647 INFO L231 Difference]: Finished difference. Result has 209 places, 388 transitions, 6274 flow [2024-06-27 19:27:08,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6274, PETRI_PLACES=209, PETRI_TRANSITIONS=388} [2024-06-27 19:27:08,648 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2024-06-27 19:27:08,648 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 388 transitions, 6274 flow [2024-06-27 19:27:08,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:08,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:08,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:27:08,649 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:08,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2022826474, now seen corresponding path program 1 times [2024-06-27 19:27:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:08,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509012893] [2024-06-27 19:27:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509012893] [2024-06-27 19:27:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509012893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:08,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:08,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255179060] [2024-06-27 19:27:08,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:08,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:08,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:08,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 388 transitions, 6274 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:08,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:08,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:08,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:10,286 INFO L124 PetriNetUnfolderBase]: 8045/11911 cut-off events. [2024-06-27 19:27:10,286 INFO L125 PetriNetUnfolderBase]: For 572306/572306 co-relation queries the response was YES. [2024-06-27 19:27:10,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96235 conditions, 11911 events. 8045/11911 cut-off events. For 572306/572306 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 71849 event pairs, 1969 based on Foata normal form. 36/11938 useless extension candidates. Maximal degree in co-relation 96133. Up to 9787 conditions per place. [2024-06-27 19:27:10,434 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 45 changer transitions 0/463 dead transitions. [2024-06-27 19:27:10,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 463 transitions, 8042 flow [2024-06-27 19:27:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-27 19:27:10,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-27 19:27:10,435 INFO L175 Difference]: Start difference. First operand has 209 places, 388 transitions, 6274 flow. Second operand 7 states and 226 transitions. [2024-06-27 19:27:10,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 463 transitions, 8042 flow [2024-06-27 19:27:11,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 463 transitions, 7891 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:11,768 INFO L231 Difference]: Finished difference. Result has 214 places, 396 transitions, 6381 flow [2024-06-27 19:27:11,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=214, PETRI_TRANSITIONS=396} [2024-06-27 19:27:11,768 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-27 19:27:11,768 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 396 transitions, 6381 flow [2024-06-27 19:27:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:11,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:11,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:27:11,769 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:11,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:11,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1451694288, now seen corresponding path program 2 times [2024-06-27 19:27:11,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42461332] [2024-06-27 19:27:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42461332] [2024-06-27 19:27:11,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42461332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:11,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:11,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:11,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633990591] [2024-06-27 19:27:11,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:11,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:11,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:11,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:11,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 396 transitions, 6381 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:11,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:11,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:11,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:13,663 INFO L124 PetriNetUnfolderBase]: 8322/12312 cut-off events. [2024-06-27 19:27:13,663 INFO L125 PetriNetUnfolderBase]: For 616901/616901 co-relation queries the response was YES. [2024-06-27 19:27:13,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100909 conditions, 12312 events. 8322/12312 cut-off events. For 616901/616901 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 74808 event pairs, 2189 based on Foata normal form. 42/12341 useless extension candidates. Maximal degree in co-relation 100806. Up to 11052 conditions per place. [2024-06-27 19:27:13,826 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 387 selfloop transitions, 44 changer transitions 0/440 dead transitions. [2024-06-27 19:27:13,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 440 transitions, 7649 flow [2024-06-27 19:27:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 19:27:13,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209912536443148 [2024-06-27 19:27:13,827 INFO L175 Difference]: Start difference. First operand has 214 places, 396 transitions, 6381 flow. Second operand 7 states and 213 transitions. [2024-06-27 19:27:13,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 440 transitions, 7649 flow [2024-06-27 19:27:15,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 440 transitions, 7513 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:15,252 INFO L231 Difference]: Finished difference. Result has 218 places, 398 transitions, 6401 flow [2024-06-27 19:27:15,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6401, PETRI_PLACES=218, PETRI_TRANSITIONS=398} [2024-06-27 19:27:15,253 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2024-06-27 19:27:15,253 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 398 transitions, 6401 flow [2024-06-27 19:27:15,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:15,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:15,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:15,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:27:15,253 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:15,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1451546418, now seen corresponding path program 3 times [2024-06-27 19:27:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:15,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059742299] [2024-06-27 19:27:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:15,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:15,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059742299] [2024-06-27 19:27:15,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059742299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346194213] [2024-06-27 19:27:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:15,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:15,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 398 transitions, 6401 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:15,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:15,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:15,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:17,550 INFO L124 PetriNetUnfolderBase]: 8830/13080 cut-off events. [2024-06-27 19:27:17,550 INFO L125 PetriNetUnfolderBase]: For 670113/670113 co-relation queries the response was YES. [2024-06-27 19:27:17,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107234 conditions, 13080 events. 8830/13080 cut-off events. For 670113/670113 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80529 event pairs, 2287 based on Foata normal form. 36/13107 useless extension candidates. Maximal degree in co-relation 107130. Up to 11193 conditions per place. [2024-06-27 19:27:18,034 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 399 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-27 19:27:18,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 453 transitions, 7892 flow [2024-06-27 19:27:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 19:27:18,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355685131195336 [2024-06-27 19:27:18,053 INFO L175 Difference]: Start difference. First operand has 218 places, 398 transitions, 6401 flow. Second operand 7 states and 218 transitions. [2024-06-27 19:27:18,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 453 transitions, 7892 flow [2024-06-27 19:27:19,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 453 transitions, 7771 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:19,270 INFO L231 Difference]: Finished difference. Result has 221 places, 403 transitions, 6500 flow [2024-06-27 19:27:19,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6500, PETRI_PLACES=221, PETRI_TRANSITIONS=403} [2024-06-27 19:27:19,270 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-27 19:27:19,271 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 403 transitions, 6500 flow [2024-06-27 19:27:19,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:19,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:19,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:19,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:27:19,271 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:19,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1021139242, now seen corresponding path program 1 times [2024-06-27 19:27:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167438283] [2024-06-27 19:27:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:19,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167438283] [2024-06-27 19:27:19,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167438283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:19,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:19,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:27:19,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466804391] [2024-06-27 19:27:19,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:27:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:27:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:27:19,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:19,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 403 transitions, 6500 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:19,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:19,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:19,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:21,473 INFO L124 PetriNetUnfolderBase]: 8837/13101 cut-off events. [2024-06-27 19:27:21,474 INFO L125 PetriNetUnfolderBase]: For 669886/669886 co-relation queries the response was YES. [2024-06-27 19:27:21,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108958 conditions, 13101 events. 8837/13101 cut-off events. For 669886/669886 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80674 event pairs, 2396 based on Foata normal form. 1/13098 useless extension candidates. Maximal degree in co-relation 108852. Up to 12162 conditions per place. [2024-06-27 19:27:21,738 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 408 selfloop transitions, 20 changer transitions 0/437 dead transitions. [2024-06-27 19:27:21,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 437 transitions, 7835 flow [2024-06-27 19:27:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:27:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:27:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 19:27:21,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:27:21,739 INFO L175 Difference]: Start difference. First operand has 221 places, 403 transitions, 6500 flow. Second operand 5 states and 147 transitions. [2024-06-27 19:27:21,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 437 transitions, 7835 flow [2024-06-27 19:27:23,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 437 transitions, 7720 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:23,083 INFO L231 Difference]: Finished difference. Result has 225 places, 418 transitions, 6819 flow [2024-06-27 19:27:23,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6819, PETRI_PLACES=225, PETRI_TRANSITIONS=418} [2024-06-27 19:27:23,083 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-27 19:27:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 418 transitions, 6819 flow [2024-06-27 19:27:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:23,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:23,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:27:23,084 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:23,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1769900910, now seen corresponding path program 4 times [2024-06-27 19:27:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200694479] [2024-06-27 19:27:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:23,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:23,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200694479] [2024-06-27 19:27:23,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200694479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:23,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:23,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776400494] [2024-06-27 19:27:23,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:23,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:23,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:23,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 418 transitions, 6819 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:23,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:23,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:23,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:25,527 INFO L124 PetriNetUnfolderBase]: 9063/13398 cut-off events. [2024-06-27 19:27:25,527 INFO L125 PetriNetUnfolderBase]: For 736057/736063 co-relation queries the response was YES. [2024-06-27 19:27:25,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111273 conditions, 13398 events. 9063/13398 cut-off events. For 736057/736063 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 82609 event pairs, 2412 based on Foata normal form. 46/13433 useless extension candidates. Maximal degree in co-relation 111163. Up to 12177 conditions per place. [2024-06-27 19:27:25,684 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 402 selfloop transitions, 50 changer transitions 0/461 dead transitions. [2024-06-27 19:27:25,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 461 transitions, 8020 flow [2024-06-27 19:27:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 19:27:25,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045918367346939 [2024-06-27 19:27:25,704 INFO L175 Difference]: Start difference. First operand has 225 places, 418 transitions, 6819 flow. Second operand 8 states and 237 transitions. [2024-06-27 19:27:25,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 461 transitions, 8020 flow [2024-06-27 19:27:26,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 461 transitions, 7994 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-27 19:27:26,961 INFO L231 Difference]: Finished difference. Result has 233 places, 420 transitions, 6969 flow [2024-06-27 19:27:26,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=233, PETRI_TRANSITIONS=420} [2024-06-27 19:27:26,961 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 181 predicate places. [2024-06-27 19:27:26,961 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 420 transitions, 6969 flow [2024-06-27 19:27:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:26,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:26,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:26,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:27:26,962 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:26,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 571410606, now seen corresponding path program 5 times [2024-06-27 19:27:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:26,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193480150] [2024-06-27 19:27:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:27,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193480150] [2024-06-27 19:27:27,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193480150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:27,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:27,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:27,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876354805] [2024-06-27 19:27:27,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:27,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:27,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:27,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:27,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:27,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 420 transitions, 6969 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:27,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:27,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:27,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:29,468 INFO L124 PetriNetUnfolderBase]: 9301/13761 cut-off events. [2024-06-27 19:27:29,468 INFO L125 PetriNetUnfolderBase]: For 767406/767406 co-relation queries the response was YES. [2024-06-27 19:27:29,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114798 conditions, 13761 events. 9301/13761 cut-off events. For 767406/767406 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 85266 event pairs, 2496 based on Foata normal form. 42/13794 useless extension candidates. Maximal degree in co-relation 114685. Up to 12465 conditions per place. [2024-06-27 19:27:29,643 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 400 selfloop transitions, 46 changer transitions 0/455 dead transitions. [2024-06-27 19:27:29,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 455 transitions, 8144 flow [2024-06-27 19:27:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 19:27:29,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-27 19:27:29,644 INFO L175 Difference]: Start difference. First operand has 233 places, 420 transitions, 6969 flow. Second operand 6 states and 185 transitions. [2024-06-27 19:27:29,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 455 transitions, 8144 flow [2024-06-27 19:27:31,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 455 transitions, 8016 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:31,311 INFO L231 Difference]: Finished difference. Result has 234 places, 422 transitions, 7013 flow [2024-06-27 19:27:31,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7013, PETRI_PLACES=234, PETRI_TRANSITIONS=422} [2024-06-27 19:27:31,311 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-27 19:27:31,312 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 422 transitions, 7013 flow [2024-06-27 19:27:31,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:31,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:31,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:31,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:27:31,312 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:31,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1024865642, now seen corresponding path program 6 times [2024-06-27 19:27:31,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947151267] [2024-06-27 19:27:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947151267] [2024-06-27 19:27:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947151267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:31,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:31,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935177705] [2024-06-27 19:27:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:31,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:31,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 422 transitions, 7013 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:31,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:31,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:31,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:34,014 INFO L124 PetriNetUnfolderBase]: 9431/13967 cut-off events. [2024-06-27 19:27:34,015 INFO L125 PetriNetUnfolderBase]: For 778802/778802 co-relation queries the response was YES. [2024-06-27 19:27:34,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115973 conditions, 13967 events. 9431/13967 cut-off events. For 778802/778802 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 86785 event pairs, 2388 based on Foata normal form. 36/13994 useless extension candidates. Maximal degree in co-relation 115858. Up to 11752 conditions per place. [2024-06-27 19:27:34,189 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 412 selfloop transitions, 50 changer transitions 0/471 dead transitions. [2024-06-27 19:27:34,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 471 transitions, 8435 flow [2024-06-27 19:27:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:27:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:27:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-27 19:27:34,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-27 19:27:34,190 INFO L175 Difference]: Start difference. First operand has 234 places, 422 transitions, 7013 flow. Second operand 6 states and 194 transitions. [2024-06-27 19:27:34,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 471 transitions, 8435 flow [2024-06-27 19:27:35,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 471 transitions, 8298 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:35,933 INFO L231 Difference]: Finished difference. Result has 237 places, 426 transitions, 7116 flow [2024-06-27 19:27:35,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7116, PETRI_PLACES=237, PETRI_TRANSITIONS=426} [2024-06-27 19:27:35,933 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-27 19:27:35,933 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 426 transitions, 7116 flow [2024-06-27 19:27:35,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:35,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:35,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:35,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:27:35,934 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:35,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:35,934 INFO L85 PathProgramCache]: Analyzing trace with hash 778336908, now seen corresponding path program 1 times [2024-06-27 19:27:35,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:35,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979774080] [2024-06-27 19:27:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:35,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:36,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:36,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979774080] [2024-06-27 19:27:36,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979774080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:36,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:36,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:36,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624406158] [2024-06-27 19:27:36,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:36,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:36,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:36,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:36,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 426 transitions, 7116 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:36,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:36,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:36,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:38,630 INFO L124 PetriNetUnfolderBase]: 9515/14087 cut-off events. [2024-06-27 19:27:38,631 INFO L125 PetriNetUnfolderBase]: For 804628/804634 co-relation queries the response was YES. [2024-06-27 19:27:38,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117099 conditions, 14087 events. 9515/14087 cut-off events. For 804628/804634 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87693 event pairs, 2412 based on Foata normal form. 40/14118 useless extension candidates. Maximal degree in co-relation 116982. Up to 12298 conditions per place. [2024-06-27 19:27:38,824 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 57 changer transitions 0/475 dead transitions. [2024-06-27 19:27:38,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 475 transitions, 8400 flow [2024-06-27 19:27:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 19:27:38,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-27 19:27:38,825 INFO L175 Difference]: Start difference. First operand has 237 places, 426 transitions, 7116 flow. Second operand 8 states and 241 transitions. [2024-06-27 19:27:38,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 475 transitions, 8400 flow [2024-06-27 19:27:41,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 475 transitions, 8183 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:41,037 INFO L231 Difference]: Finished difference. Result has 240 places, 428 transitions, 7088 flow [2024-06-27 19:27:41,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7088, PETRI_PLACES=240, PETRI_TRANSITIONS=428} [2024-06-27 19:27:41,038 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 188 predicate places. [2024-06-27 19:27:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 428 transitions, 7088 flow [2024-06-27 19:27:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:41,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:41,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:41,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:27:41,038 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:41,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash -8792392, now seen corresponding path program 2 times [2024-06-27 19:27:41,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:41,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240551951] [2024-06-27 19:27:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:41,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240551951] [2024-06-27 19:27:41,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240551951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:41,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:41,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:27:41,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145421868] [2024-06-27 19:27:41,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:41,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:27:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:27:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:27:41,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:41,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 428 transitions, 7088 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:41,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:41,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:41,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:43,334 INFO L124 PetriNetUnfolderBase]: 9511/14080 cut-off events. [2024-06-27 19:27:43,334 INFO L125 PetriNetUnfolderBase]: For 781677/781677 co-relation queries the response was YES. [2024-06-27 19:27:43,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116171 conditions, 14080 events. 9511/14080 cut-off events. For 781677/781677 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87709 event pairs, 2593 based on Foata normal form. 1/14076 useless extension candidates. Maximal degree in co-relation 116054. Up to 13128 conditions per place. [2024-06-27 19:27:43,503 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 411 selfloop transitions, 20 changer transitions 0/440 dead transitions. [2024-06-27 19:27:43,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 440 transitions, 7980 flow [2024-06-27 19:27:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:27:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:27:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 19:27:43,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:27:43,504 INFO L175 Difference]: Start difference. First operand has 240 places, 428 transitions, 7088 flow. Second operand 5 states and 140 transitions. [2024-06-27 19:27:43,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 440 transitions, 7980 flow [2024-06-27 19:27:45,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 440 transitions, 7800 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:45,598 INFO L231 Difference]: Finished difference. Result has 238 places, 428 transitions, 6955 flow [2024-06-27 19:27:45,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6955, PETRI_PLACES=238, PETRI_TRANSITIONS=428} [2024-06-27 19:27:45,599 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 186 predicate places. [2024-06-27 19:27:45,599 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 428 transitions, 6955 flow [2024-06-27 19:27:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:45,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:45,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:45,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:27:45,600 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:45,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:45,600 INFO L85 PathProgramCache]: Analyzing trace with hash -40953776, now seen corresponding path program 1 times [2024-06-27 19:27:45,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:45,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274978789] [2024-06-27 19:27:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:45,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:45,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274978789] [2024-06-27 19:27:45,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274978789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:45,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:45,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:27:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764364950] [2024-06-27 19:27:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:45,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:27:45,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:27:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:27:45,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:27:45,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 428 transitions, 6955 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:45,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:45,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:27:45,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:48,061 INFO L124 PetriNetUnfolderBase]: 9241/13734 cut-off events. [2024-06-27 19:27:48,062 INFO L125 PetriNetUnfolderBase]: For 818983/818983 co-relation queries the response was YES. [2024-06-27 19:27:48,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114190 conditions, 13734 events. 9241/13734 cut-off events. For 818983/818983 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 86127 event pairs, 2457 based on Foata normal form. 12/13546 useless extension candidates. Maximal degree in co-relation 114073. Up to 12527 conditions per place. [2024-06-27 19:27:48,237 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 392 selfloop transitions, 23 changer transitions 0/447 dead transitions. [2024-06-27 19:27:48,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 447 transitions, 7913 flow [2024-06-27 19:27:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:27:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:27:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 19:27:48,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-27 19:27:48,238 INFO L175 Difference]: Start difference. First operand has 238 places, 428 transitions, 6955 flow. Second operand 5 states and 148 transitions. [2024-06-27 19:27:48,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 447 transitions, 7913 flow [2024-06-27 19:27:49,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 447 transitions, 7884 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:27:49,691 INFO L231 Difference]: Finished difference. Result has 242 places, 431 transitions, 7052 flow [2024-06-27 19:27:49,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7052, PETRI_PLACES=242, PETRI_TRANSITIONS=431} [2024-06-27 19:27:49,691 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 190 predicate places. [2024-06-27 19:27:49,692 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 431 transitions, 7052 flow [2024-06-27 19:27:49,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:49,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:27:49,692 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:49,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1281256740, now seen corresponding path program 1 times [2024-06-27 19:27:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136640077] [2024-06-27 19:27:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136640077] [2024-06-27 19:27:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136640077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:49,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036889190] [2024-06-27 19:27:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:49,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 431 transitions, 7052 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:52,329 INFO L124 PetriNetUnfolderBase]: 9578/14166 cut-off events. [2024-06-27 19:27:52,330 INFO L125 PetriNetUnfolderBase]: For 831147/831175 co-relation queries the response was YES. [2024-06-27 19:27:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117589 conditions, 14166 events. 9578/14166 cut-off events. For 831147/831175 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88295 event pairs, 2641 based on Foata normal form. 23/14171 useless extension candidates. Maximal degree in co-relation 117470. Up to 12372 conditions per place. [2024-06-27 19:27:52,548 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 300 selfloop transitions, 194 changer transitions 0/503 dead transitions. [2024-06-27 19:27:52,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 503 transitions, 9228 flow [2024-06-27 19:27:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:27:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:27:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 376 transitions. [2024-06-27 19:27:52,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902668759811617 [2024-06-27 19:27:52,550 INFO L175 Difference]: Start difference. First operand has 242 places, 431 transitions, 7052 flow. Second operand 13 states and 376 transitions. [2024-06-27 19:27:52,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 503 transitions, 9228 flow [2024-06-27 19:27:54,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 503 transitions, 9142 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:54,647 INFO L231 Difference]: Finished difference. Result has 254 places, 442 transitions, 7646 flow [2024-06-27 19:27:54,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7646, PETRI_PLACES=254, PETRI_TRANSITIONS=442} [2024-06-27 19:27:54,647 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 202 predicate places. [2024-06-27 19:27:54,647 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 442 transitions, 7646 flow [2024-06-27 19:27:54,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:54,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:54,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:27:54,648 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:54,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1872876384, now seen corresponding path program 2 times [2024-06-27 19:27:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679522775] [2024-06-27 19:27:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:54,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:54,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679522775] [2024-06-27 19:27:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679522775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:54,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:54,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442952103] [2024-06-27 19:27:54,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:54,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:54,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:54,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 442 transitions, 7646 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:54,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:54,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:27:54,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:57,194 INFO L124 PetriNetUnfolderBase]: 9570/14163 cut-off events. [2024-06-27 19:27:57,194 INFO L125 PetriNetUnfolderBase]: For 866700/866728 co-relation queries the response was YES. [2024-06-27 19:27:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119478 conditions, 14163 events. 9570/14163 cut-off events. For 866700/866728 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88402 event pairs, 2641 based on Foata normal form. 23/14168 useless extension candidates. Maximal degree in co-relation 119356. Up to 12366 conditions per place. [2024-06-27 19:27:57,373 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 299 selfloop transitions, 191 changer transitions 0/499 dead transitions. [2024-06-27 19:27:57,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 499 transitions, 9376 flow [2024-06-27 19:27:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:27:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:27:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 329 transitions. [2024-06-27 19:27:57,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2024-06-27 19:27:57,375 INFO L175 Difference]: Start difference. First operand has 254 places, 442 transitions, 7646 flow. Second operand 11 states and 329 transitions. [2024-06-27 19:27:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 499 transitions, 9376 flow [2024-06-27 19:27:59,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 499 transitions, 8889 flow, removed 107 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:59,860 INFO L231 Difference]: Finished difference. Result has 257 places, 442 transitions, 7552 flow [2024-06-27 19:27:59,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7552, PETRI_PLACES=257, PETRI_TRANSITIONS=442} [2024-06-27 19:27:59,860 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-27 19:27:59,860 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 442 transitions, 7552 flow [2024-06-27 19:27:59,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:59,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:59,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:27:59,861 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:27:59,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:59,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2109144000, now seen corresponding path program 1 times [2024-06-27 19:27:59,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:59,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115036776] [2024-06-27 19:27:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:59,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:59,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115036776] [2024-06-27 19:27:59,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115036776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:59,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:59,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:59,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932754184] [2024-06-27 19:27:59,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:59,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:59,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:59,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:27:59,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 442 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:00,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:28:00,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:03,611 INFO L124 PetriNetUnfolderBase]: 13274/19870 cut-off events. [2024-06-27 19:28:03,611 INFO L125 PetriNetUnfolderBase]: For 1636237/1636265 co-relation queries the response was YES. [2024-06-27 19:28:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172030 conditions, 19870 events. 13274/19870 cut-off events. For 1636237/1636265 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 133108 event pairs, 3381 based on Foata normal form. 182/20033 useless extension candidates. Maximal degree in co-relation 171907. Up to 11378 conditions per place. [2024-06-27 19:28:03,867 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 321 selfloop transitions, 197 changer transitions 0/527 dead transitions. [2024-06-27 19:28:03,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 527 transitions, 9906 flow [2024-06-27 19:28:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:28:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:28:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 297 transitions. [2024-06-27 19:28:03,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-27 19:28:03,868 INFO L175 Difference]: Start difference. First operand has 257 places, 442 transitions, 7552 flow. Second operand 9 states and 297 transitions. [2024-06-27 19:28:03,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 527 transitions, 9906 flow