./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_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.2024-05-21_14-57-05.files/protection/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe015_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-76401ed-m [2024-06-20 15:22:19,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:22:19,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:22:19,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:22:19,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:22:19,711 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:22:19,711 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:22:19,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:22:19,712 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:22:19,713 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:22:19,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:22:19,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:22:19,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:22:19,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:22:19,715 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:22:19,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:22:19,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:22:19,716 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:22:19,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:22:19,716 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:22:19,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:22:19,721 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:22:19,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:22:19,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:22:19,722 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:22:19,722 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:22:19,723 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:22:19,723 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:22:19,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:22:19,724 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:22:19,724 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:22:19,725 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:22:19,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:22:19,725 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:22:19,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:22:19,726 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:22:19,726 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:22:19,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:22:19,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:22:19,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:22:19,727 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:22:19,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:22:19,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:22:19,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:22:19,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:22:19,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:22:19,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:22:19,976 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:22:19,977 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:22:19,978 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 15:22:20,114 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:22:20,114 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:22:20,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:22:21,261 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:22:21,496 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:22:21,496 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:22:21,509 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8313fe8df/31e95b412e8249c3839452dce3adca1c/FLAGa35ae37fc [2024-06-20 15:22:21,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8313fe8df/31e95b412e8249c3839452dce3adca1c [2024-06-20 15:22:21,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:22:21,521 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:22:21,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:22:21,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:22:21,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:22:21,528 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:22:20" (1/2) ... [2024-06-20 15:22:21,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8f87b6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:22:21, skipping insertion in model container [2024-06-20 15:22:21,529 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:22:20" (1/2) ... [2024-06-20 15:22:21,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@114c2302 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:22:21, skipping insertion in model container [2024-06-20 15:22:21,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:22:21" (2/2) ... [2024-06-20 15:22:21,531 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8f87b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:21, skipping insertion in model container [2024-06-20 15:22:21,531 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:22:21" (2/2) ... [2024-06-20 15:22:21,531 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:22:21,569 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:22:21,570 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:22:21,570 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:22:21,570 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:22:21,570 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:22:21,571 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-20 15:22:21,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:22:21,962 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:22:21,979 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:22:22,106 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:22:22,146 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:22:22,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22 WrapperNode [2024-06-20 15:22:22,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:22:22,148 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:22:22,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:22:22,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:22:22,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,219 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-20 15:22:22,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:22:22,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:22:22,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:22:22,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:22:22,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,237 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,260 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]. [2024-06-20 15:22:22,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:22:22,289 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:22:22,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:22:22,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:22:22,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (1/1) ... [2024-06-20 15:22:22,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:22:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:22:22,312 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) [2024-06-20 15:22:22,332 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 [2024-06-20 15:22:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:22:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:22:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:22:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:22:22,345 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:22:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:22:22,345 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:22:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:22:22,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:22:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:22:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:22:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:22:22,347 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:22:22,470 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:22:22,472 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:22:22,670 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:22:22,670 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:22:22,816 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:22:22,816 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:22:22,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:22:22 BoogieIcfgContainer [2024-06-20 15:22:22,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:22:22,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:22:22,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:22:22,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:22:22,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:22:20" (1/4) ... [2024-06-20 15:22:22,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23230733 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:22:22, skipping insertion in model container [2024-06-20 15:22:22,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:22:21" (2/4) ... [2024-06-20 15:22:22,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23230733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:22:22, skipping insertion in model container [2024-06-20 15:22:22,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:22:22" (3/4) ... [2024-06-20 15:22:22,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23230733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:22:22, skipping insertion in model container [2024-06-20 15:22:22,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:22:22" (4/4) ... [2024-06-20 15:22:22,833 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:22:22,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:22:22,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:22:22,851 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:22:22,906 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:22:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:22:22,980 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 15:22:22,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:22:22,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:22:22,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:22:22,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 15:22:23,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:22:23,011 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;@462795cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:22:23,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:22:23,017 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:22:23,017 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:22:23,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:22:23,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:23,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:22:23,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:23,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash 219931435, now seen corresponding path program 1 times [2024-06-20 15:22:23,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:23,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316055973] [2024-06-20 15:22:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:23,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:23,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316055973] [2024-06-20 15:22:23,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316055973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:23,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:23,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:22:23,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509780196] [2024-06-20 15:22:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:22:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:22:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:22:23,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 15:22:23,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:23,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:23,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 15:22:23,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:23,802 INFO L124 PetriNetUnfolderBase]: 603/1018 cut-off events. [2024-06-20 15:22:23,802 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 15:22:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1018 events. 603/1018 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5139 event pairs, 376 based on Foata normal form. 1/962 useless extension candidates. Maximal degree in co-relation 1998. Up to 929 conditions per place. [2024-06-20 15:22:23,815 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 28 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 15:22:23,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 163 flow [2024-06-20 15:22:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:22:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:22:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-20 15:22:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-20 15:22:23,829 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 86 transitions. [2024-06-20 15:22:23,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 163 flow [2024-06-20 15:22:23,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:23,835 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 15:22:23,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 15:22:23,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 15:22:23,842 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 15:22:23,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:23,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:23,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:23,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:22:23,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:23,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 900722890, now seen corresponding path program 1 times [2024-06-20 15:22:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:23,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240685432] [2024-06-20 15:22:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:24,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:24,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240685432] [2024-06-20 15:22:24,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240685432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:24,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:24,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:22:24,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214550623] [2024-06-20 15:22:24,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:24,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:22:24,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:22:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:22:24,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 15:22:24,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:24,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:24,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 15:22:24,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:24,306 INFO L124 PetriNetUnfolderBase]: 604/1028 cut-off events. [2024-06-20 15:22:24,306 INFO L125 PetriNetUnfolderBase]: For 201/209 co-relation queries the response was YES. [2024-06-20 15:22:24,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 1028 events. 604/1028 cut-off events. For 201/209 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5256 event pairs, 320 based on Foata normal form. 7/1009 useless extension candidates. Maximal degree in co-relation 2324. Up to 903 conditions per place. [2024-06-20 15:22:24,315 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-20 15:22:24,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 260 flow [2024-06-20 15:22:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:22:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:22:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-20 15:22:24,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134146341463414 [2024-06-20 15:22:24,321 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 117 transitions. [2024-06-20 15:22:24,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 260 flow [2024-06-20 15:22:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:22:24,325 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-20 15:22:24,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-20 15:22:24,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 15:22:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-20 15:22:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:24,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:24,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:24,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:22:24,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:24,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:24,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1616478059, now seen corresponding path program 1 times [2024-06-20 15:22:24,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:24,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309931430] [2024-06-20 15:22:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:24,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:24,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:24,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309931430] [2024-06-20 15:22:24,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309931430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:24,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:22:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575792254] [2024-06-20 15:22:24,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:22:24,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:22:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:22:24,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:24,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:24,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:24,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:24,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:24,744 INFO L124 PetriNetUnfolderBase]: 934/1513 cut-off events. [2024-06-20 15:22:24,744 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-06-20 15:22:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 1513 events. 934/1513 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7562 event pairs, 515 based on Foata normal form. 2/1511 useless extension candidates. Maximal degree in co-relation 4047. Up to 1394 conditions per place. [2024-06-20 15:22:24,754 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-06-20 15:22:24,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 359 flow [2024-06-20 15:22:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:22:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:22:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-20 15:22:24,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:22:24,756 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 4 states and 106 transitions. [2024-06-20 15:22:24,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 359 flow [2024-06-20 15:22:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 355 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:22:24,760 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 248 flow [2024-06-20 15:22:24,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-20 15:22:24,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 15:22:24,761 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 248 flow [2024-06-20 15:22:24,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:24,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:24,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:22:24,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:24,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash 135946248, now seen corresponding path program 1 times [2024-06-20 15:22:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733681459] [2024-06-20 15:22:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:24,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733681459] [2024-06-20 15:22:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733681459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:24,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895306347] [2024-06-20 15:22:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:24,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:24,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:24,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:22:24,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:24,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:24,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:22:24,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:25,253 INFO L124 PetriNetUnfolderBase]: 934/1538 cut-off events. [2024-06-20 15:22:25,254 INFO L125 PetriNetUnfolderBase]: For 1911/1932 co-relation queries the response was YES. [2024-06-20 15:22:25,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1538 events. 934/1538 cut-off events. For 1911/1932 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7898 event pairs, 249 based on Foata normal form. 20/1539 useless extension candidates. Maximal degree in co-relation 4626. Up to 1283 conditions per place. [2024-06-20 15:22:25,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-20 15:22:25,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 510 flow [2024-06-20 15:22:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 15:22:25,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-20 15:22:25,270 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 248 flow. Second operand 6 states and 167 transitions. [2024-06-20 15:22:25,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 510 flow [2024-06-20 15:22:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 506 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:22:25,278 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 327 flow [2024-06-20 15:22:25,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-20 15:22:25,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-20 15:22:25,280 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 327 flow [2024-06-20 15:22:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:25,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:25,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:22:25,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:25,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1428789046, now seen corresponding path program 1 times [2024-06-20 15:22:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185312451] [2024-06-20 15:22:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:25,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:25,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185312451] [2024-06-20 15:22:25,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185312451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:25,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:25,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:22:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440036930] [2024-06-20 15:22:25,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:22:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:22:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:22:25,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:25,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:25,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:25,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:25,611 INFO L124 PetriNetUnfolderBase]: 953/1561 cut-off events. [2024-06-20 15:22:25,611 INFO L125 PetriNetUnfolderBase]: For 2704/2707 co-relation queries the response was YES. [2024-06-20 15:22:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 1561 events. 953/1561 cut-off events. For 2704/2707 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7907 event pairs, 379 based on Foata normal form. 4/1562 useless extension candidates. Maximal degree in co-relation 5154. Up to 1429 conditions per place. [2024-06-20 15:22:25,625 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 51 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2024-06-20 15:22:25,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 480 flow [2024-06-20 15:22:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:22:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:22:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 15:22:25,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:22:25,627 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 327 flow. Second operand 4 states and 103 transitions. [2024-06-20 15:22:25,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 480 flow [2024-06-20 15:22:25,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:25,632 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 320 flow [2024-06-20 15:22:25,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-20 15:22:25,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 15:22:25,633 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 320 flow [2024-06-20 15:22:25,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:25,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:25,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:22:25,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:25,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash 588061642, now seen corresponding path program 1 times [2024-06-20 15:22:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:25,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175936422] [2024-06-20 15:22:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:25,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:25,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175936422] [2024-06-20 15:22:25,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175936422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:25,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:25,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689250583] [2024-06-20 15:22:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:25,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:25,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:25,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:25,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:25,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:25,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:26,003 INFO L124 PetriNetUnfolderBase]: 964/1573 cut-off events. [2024-06-20 15:22:26,003 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2024-06-20 15:22:26,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5241 conditions, 1573 events. 964/1573 cut-off events. For 3150/3150 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7862 event pairs, 354 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 5217. Up to 1387 conditions per place. [2024-06-20 15:22:26,035 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-20 15:22:26,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 585 flow [2024-06-20 15:22:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:22:26,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-20 15:22:26,037 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 320 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:22:26,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 585 flow [2024-06-20 15:22:26,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 573 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 15:22:26,043 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 404 flow [2024-06-20 15:22:26,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-20 15:22:26,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 15:22:26,044 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 404 flow [2024-06-20 15:22:26,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:26,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:26,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:22:26,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:26,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1367804332, now seen corresponding path program 2 times [2024-06-20 15:22:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:26,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729419522] [2024-06-20 15:22:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:26,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:26,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729419522] [2024-06-20 15:22:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729419522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:26,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:26,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66777411] [2024-06-20 15:22:26,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:26,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:26,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:26,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:26,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:26,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:26,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:26,393 INFO L124 PetriNetUnfolderBase]: 959/1559 cut-off events. [2024-06-20 15:22:26,393 INFO L125 PetriNetUnfolderBase]: For 4457/4457 co-relation queries the response was YES. [2024-06-20 15:22:26,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5731 conditions, 1559 events. 959/1559 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7799 event pairs, 355 based on Foata normal form. 2/1553 useless extension candidates. Maximal degree in co-relation 5704. Up to 1384 conditions per place. [2024-06-20 15:22:26,407 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-20 15:22:26,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 644 flow [2024-06-20 15:22:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:22:26,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 15:22:26,409 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 404 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:22:26,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 644 flow [2024-06-20 15:22:26,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 624 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 15:22:26,417 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 452 flow [2024-06-20 15:22:26,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-20 15:22:26,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-20 15:22:26,418 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 452 flow [2024-06-20 15:22:26,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:26,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:26,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:22:26,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:26,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1593731481, now seen corresponding path program 1 times [2024-06-20 15:22:26,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:26,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932882749] [2024-06-20 15:22:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932882749] [2024-06-20 15:22:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932882749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:26,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:26,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:26,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113525769] [2024-06-20 15:22:26,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:26,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:26,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:26,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:26,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:26,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:26,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:26,775 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-20 15:22:26,775 INFO L125 PetriNetUnfolderBase]: For 5493/5493 co-relation queries the response was YES. [2024-06-20 15:22:26,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1591 events. 970/1591 cut-off events. For 5493/5493 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8029 event pairs, 349 based on Foata normal form. 2/1588 useless extension candidates. Maximal degree in co-relation 6073. Up to 1396 conditions per place. [2024-06-20 15:22:26,790 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-20 15:22:26,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 719 flow [2024-06-20 15:22:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:22:26,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-20 15:22:26,792 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 452 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:22:26,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 719 flow [2024-06-20 15:22:26,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 689 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:26,802 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 496 flow [2024-06-20 15:22:26,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-20 15:22:26,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 15:22:26,803 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 496 flow [2024-06-20 15:22:26,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:26,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:26,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:22:26,804 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:26,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash -547470435, now seen corresponding path program 2 times [2024-06-20 15:22:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:26,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111603504] [2024-06-20 15:22:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:26,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111603504] [2024-06-20 15:22:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111603504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:26,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:26,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375422915] [2024-06-20 15:22:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:26,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:26,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:26,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:26,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:27,144 INFO L124 PetriNetUnfolderBase]: 965/1580 cut-off events. [2024-06-20 15:22:27,144 INFO L125 PetriNetUnfolderBase]: For 6618/6624 co-relation queries the response was YES. [2024-06-20 15:22:27,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 1580 events. 965/1580 cut-off events. For 6618/6624 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7959 event pairs, 360 based on Foata normal form. 6/1579 useless extension candidates. Maximal degree in co-relation 6166. Up to 1391 conditions per place. [2024-06-20 15:22:27,159 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-20 15:22:27,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 700 flow [2024-06-20 15:22:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:22:27,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-20 15:22:27,161 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 496 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:22:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 700 flow [2024-06-20 15:22:27,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 673 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:27,170 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 527 flow [2024-06-20 15:22:27,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=527, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-20 15:22:27,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-20 15:22:27,172 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 527 flow [2024-06-20 15:22:27,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:27,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:27,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:27,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:22:27,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:27,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash -547460515, now seen corresponding path program 1 times [2024-06-20 15:22:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305254259] [2024-06-20 15:22:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:27,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:27,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305254259] [2024-06-20 15:22:27,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305254259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:27,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:27,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:27,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634450898] [2024-06-20 15:22:27,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:27,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:27,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:27,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:27,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 527 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:27,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:27,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:27,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:27,541 INFO L124 PetriNetUnfolderBase]: 957/1573 cut-off events. [2024-06-20 15:22:27,541 INFO L125 PetriNetUnfolderBase]: For 7572/7578 co-relation queries the response was YES. [2024-06-20 15:22:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 1573 events. 957/1573 cut-off events. For 7572/7578 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7904 event pairs, 329 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 6249. Up to 1417 conditions per place. [2024-06-20 15:22:27,556 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 71 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-20 15:22:27,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 745 flow [2024-06-20 15:22:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 15:22:27,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:27,557 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 527 flow. Second operand 5 states and 125 transitions. [2024-06-20 15:22:27,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 745 flow [2024-06-20 15:22:27,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 717 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:27,566 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 546 flow [2024-06-20 15:22:27,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-20 15:22:27,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-20 15:22:27,567 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 546 flow [2024-06-20 15:22:27,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:27,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:27,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:27,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:22:27,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:27,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash -915316437, now seen corresponding path program 1 times [2024-06-20 15:22:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:27,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855967053] [2024-06-20 15:22:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:27,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:27,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:27,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855967053] [2024-06-20 15:22:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855967053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:27,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:27,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:27,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270355975] [2024-06-20 15:22:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:27,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:27,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:27,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 546 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:27,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:27,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:27,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:28,028 INFO L124 PetriNetUnfolderBase]: 1012/1669 cut-off events. [2024-06-20 15:22:28,028 INFO L125 PetriNetUnfolderBase]: For 9132/9132 co-relation queries the response was YES. [2024-06-20 15:22:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1669 events. 1012/1669 cut-off events. For 9132/9132 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8600 event pairs, 271 based on Foata normal form. 4/1669 useless extension candidates. Maximal degree in co-relation 6790. Up to 1429 conditions per place. [2024-06-20 15:22:28,044 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 29 changer transitions 0/118 dead transitions. [2024-06-20 15:22:28,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 982 flow [2024-06-20 15:22:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:22:28,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:22:28,046 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 546 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:22:28,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 982 flow [2024-06-20 15:22:28,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 953 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:28,059 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 667 flow [2024-06-20 15:22:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-06-20 15:22:28,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 15:22:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 667 flow [2024-06-20 15:22:28,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:22:28,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:28,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1808409687, now seen corresponding path program 2 times [2024-06-20 15:22:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:28,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275136145] [2024-06-20 15:22:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:28,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:28,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275136145] [2024-06-20 15:22:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275136145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:28,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:28,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:28,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700383764] [2024-06-20 15:22:28,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:28,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:28,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:28,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 667 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:28,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:28,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:28,471 INFO L124 PetriNetUnfolderBase]: 1023/1697 cut-off events. [2024-06-20 15:22:28,471 INFO L125 PetriNetUnfolderBase]: For 11529/11529 co-relation queries the response was YES. [2024-06-20 15:22:28,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7657 conditions, 1697 events. 1023/1697 cut-off events. For 11529/11529 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8692 event pairs, 311 based on Foata normal form. 2/1694 useless extension candidates. Maximal degree in co-relation 7621. Up to 1390 conditions per place. [2024-06-20 15:22:28,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-20 15:22:28,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1113 flow [2024-06-20 15:22:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:22:28,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-20 15:22:28,489 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 667 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:22:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1113 flow [2024-06-20 15:22:28,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 1037 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:28,507 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 818 flow [2024-06-20 15:22:28,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=818, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-20 15:22:28,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-20 15:22:28,509 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 818 flow [2024-06-20 15:22:28,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:28,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:28,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:22:28,510 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:28,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash 200005899, now seen corresponding path program 3 times [2024-06-20 15:22:28,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:28,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076670052] [2024-06-20 15:22:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:28,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:28,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:28,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076670052] [2024-06-20 15:22:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076670052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:28,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129441655] [2024-06-20 15:22:28,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:28,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:28,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:28,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:28,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:28,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:28,913 INFO L124 PetriNetUnfolderBase]: 1018/1667 cut-off events. [2024-06-20 15:22:28,913 INFO L125 PetriNetUnfolderBase]: For 14135/14135 co-relation queries the response was YES. [2024-06-20 15:22:28,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 1667 events. 1018/1667 cut-off events. For 14135/14135 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8488 event pairs, 337 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 8095. Up to 1387 conditions per place. [2024-06-20 15:22:28,927 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-06-20 15:22:28,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1178 flow [2024-06-20 15:22:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:22:28,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:22:28,929 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 818 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:22:28,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1178 flow [2024-06-20 15:22:28,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 1142 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-20 15:22:28,946 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 900 flow [2024-06-20 15:22:28,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=900, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-20 15:22:28,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 15:22:28,948 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 900 flow [2024-06-20 15:22:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:28,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:28,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:28,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:22:28,949 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:28,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 641726190, now seen corresponding path program 1 times [2024-06-20 15:22:28,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063052122] [2024-06-20 15:22:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:28,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:29,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:29,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063052122] [2024-06-20 15:22:29,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063052122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:29,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:29,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700149984] [2024-06-20 15:22:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:29,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:22:29,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 900 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:29,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:22:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:29,326 INFO L124 PetriNetUnfolderBase]: 923/1561 cut-off events. [2024-06-20 15:22:29,327 INFO L125 PetriNetUnfolderBase]: For 15407/15412 co-relation queries the response was YES. [2024-06-20 15:22:29,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 1561 events. 923/1561 cut-off events. For 15407/15412 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8111 event pairs, 312 based on Foata normal form. 8/1562 useless extension candidates. Maximal degree in co-relation 7868. Up to 1345 conditions per place. [2024-06-20 15:22:29,342 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 75 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-06-20 15:22:29,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 1121 flow [2024-06-20 15:22:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:22:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:22:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-20 15:22:29,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-20 15:22:29,343 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 900 flow. Second operand 4 states and 105 transitions. [2024-06-20 15:22:29,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 1121 flow [2024-06-20 15:22:29,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 1055 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:29,364 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 880 flow [2024-06-20 15:22:29,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=880, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2024-06-20 15:22:29,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-20 15:22:29,365 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 880 flow [2024-06-20 15:22:29,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:29,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:29,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:22:29,366 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:29,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash -96637342, now seen corresponding path program 1 times [2024-06-20 15:22:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390650937] [2024-06-20 15:22:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:29,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:29,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390650937] [2024-06-20 15:22:29,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390650937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:29,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:29,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:29,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797166027] [2024-06-20 15:22:29,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:29,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:29,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:29,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:29,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 880 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:29,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:29,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:29,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:29,833 INFO L124 PetriNetUnfolderBase]: 982/1632 cut-off events. [2024-06-20 15:22:29,834 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-06-20 15:22:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8164 conditions, 1632 events. 982/1632 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8263 event pairs, 302 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 8120. Up to 1396 conditions per place. [2024-06-20 15:22:29,848 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 87 selfloop transitions, 35 changer transitions 0/130 dead transitions. [2024-06-20 15:22:29,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1218 flow [2024-06-20 15:22:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:22:29,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-20 15:22:29,850 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 880 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:22:29,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1218 flow [2024-06-20 15:22:29,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1166 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:29,877 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 911 flow [2024-06-20 15:22:29,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2024-06-20 15:22:29,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 15:22:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 911 flow [2024-06-20 15:22:29,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:29,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:29,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:29,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:22:29,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:29,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:29,880 INFO L85 PathProgramCache]: Analyzing trace with hash -226124126, now seen corresponding path program 2 times [2024-06-20 15:22:29,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:29,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068788574] [2024-06-20 15:22:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:30,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:30,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068788574] [2024-06-20 15:22:30,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068788574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:30,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:30,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:30,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718540726] [2024-06-20 15:22:30,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:30,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:30,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:30,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:30,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 911 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:30,337 INFO L124 PetriNetUnfolderBase]: 993/1655 cut-off events. [2024-06-20 15:22:30,337 INFO L125 PetriNetUnfolderBase]: For 18270/18270 co-relation queries the response was YES. [2024-06-20 15:22:30,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8453 conditions, 1655 events. 993/1655 cut-off events. For 18270/18270 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8453 event pairs, 306 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 8409. Up to 1347 conditions per place. [2024-06-20 15:22:30,353 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-20 15:22:30,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1317 flow [2024-06-20 15:22:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:22:30,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:22:30,355 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 911 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:22:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1317 flow [2024-06-20 15:22:30,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 1247 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:30,382 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 957 flow [2024-06-20 15:22:30,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=957, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-20 15:22:30,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-20 15:22:30,383 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 957 flow [2024-06-20 15:22:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:30,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:22:30,384 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:30,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash -225916736, now seen corresponding path program 3 times [2024-06-20 15:22:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391816802] [2024-06-20 15:22:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:30,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:30,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391816802] [2024-06-20 15:22:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391816802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:30,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505760832] [2024-06-20 15:22:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:30,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:30,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:30,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:30,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 957 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:30,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:30,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:30,810 INFO L124 PetriNetUnfolderBase]: 1020/1704 cut-off events. [2024-06-20 15:22:30,810 INFO L125 PetriNetUnfolderBase]: For 20837/20837 co-relation queries the response was YES. [2024-06-20 15:22:30,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8882 conditions, 1704 events. 1020/1704 cut-off events. For 20837/20837 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8754 event pairs, 306 based on Foata normal form. 2/1701 useless extension candidates. Maximal degree in co-relation 8837. Up to 1376 conditions per place. [2024-06-20 15:22:30,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 43 changer transitions 0/134 dead transitions. [2024-06-20 15:22:30,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1477 flow [2024-06-20 15:22:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:22:30,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:22:30,829 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 957 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:22:30,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1477 flow [2024-06-20 15:22:30,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1375 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:30,861 INFO L231 Difference]: Finished difference. Result has 98 places, 108 transitions, 1029 flow [2024-06-20 15:22:30,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1029, PETRI_PLACES=98, PETRI_TRANSITIONS=108} [2024-06-20 15:22:30,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-20 15:22:30,862 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 108 transitions, 1029 flow [2024-06-20 15:22:30,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:30,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:22:30,862 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:30,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -225908800, now seen corresponding path program 1 times [2024-06-20 15:22:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:30,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442421688] [2024-06-20 15:22:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442421688] [2024-06-20 15:22:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442421688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:30,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:30,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:30,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465062668] [2024-06-20 15:22:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:30,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:30,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:31,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:31,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 108 transitions, 1029 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:31,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:31,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:31,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:31,282 INFO L124 PetriNetUnfolderBase]: 1037/1729 cut-off events. [2024-06-20 15:22:31,282 INFO L125 PetriNetUnfolderBase]: For 23067/23067 co-relation queries the response was YES. [2024-06-20 15:22:31,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9087 conditions, 1729 events. 1037/1729 cut-off events. For 23067/23067 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8890 event pairs, 302 based on Foata normal form. 4/1728 useless extension candidates. Maximal degree in co-relation 9041. Up to 1476 conditions per place. [2024-06-20 15:22:31,297 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 101 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-20 15:22:31,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 1357 flow [2024-06-20 15:22:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:22:31,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:22:31,299 INFO L175 Difference]: Start difference. First operand has 98 places, 108 transitions, 1029 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:22:31,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 1357 flow [2024-06-20 15:22:31,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 133 transitions, 1293 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:31,330 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 1044 flow [2024-06-20 15:22:31,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-20 15:22:31,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-20 15:22:31,331 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 1044 flow [2024-06-20 15:22:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:31,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:31,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:22:31,332 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:31,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2133042500, now seen corresponding path program 4 times [2024-06-20 15:22:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647299432] [2024-06-20 15:22:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:31,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647299432] [2024-06-20 15:22:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647299432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:31,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:31,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:31,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780628333] [2024-06-20 15:22:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:31,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:31,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 1044 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:31,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:31,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:31,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:31,720 INFO L124 PetriNetUnfolderBase]: 1032/1713 cut-off events. [2024-06-20 15:22:31,720 INFO L125 PetriNetUnfolderBase]: For 25209/25215 co-relation queries the response was YES. [2024-06-20 15:22:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 1713 events. 1032/1713 cut-off events. For 25209/25215 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8881 event pairs, 334 based on Foata normal form. 6/1708 useless extension candidates. Maximal degree in co-relation 9130. Up to 1398 conditions per place. [2024-06-20 15:22:31,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 81 selfloop transitions, 43 changer transitions 0/132 dead transitions. [2024-06-20 15:22:31,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1427 flow [2024-06-20 15:22:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:22:31,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:22:31,738 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 1044 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:22:31,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1427 flow [2024-06-20 15:22:31,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1362 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:31,766 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 1086 flow [2024-06-20 15:22:31,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1086, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-20 15:22:31,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-20 15:22:31,767 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 1086 flow [2024-06-20 15:22:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:31,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:31,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:22:31,768 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1508049312, now seen corresponding path program 5 times [2024-06-20 15:22:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038500678] [2024-06-20 15:22:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:31,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038500678] [2024-06-20 15:22:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038500678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97752374] [2024-06-20 15:22:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:31,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:31,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 1086 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:31,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:31,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:31,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:32,260 INFO L124 PetriNetUnfolderBase]: 1027/1691 cut-off events. [2024-06-20 15:22:32,261 INFO L125 PetriNetUnfolderBase]: For 26983/26983 co-relation queries the response was YES. [2024-06-20 15:22:32,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9240 conditions, 1691 events. 1027/1691 cut-off events. For 26983/26983 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8637 event pairs, 338 based on Foata normal form. 2/1679 useless extension candidates. Maximal degree in co-relation 9192. Up to 1393 conditions per place. [2024-06-20 15:22:32,278 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 46 changer transitions 0/134 dead transitions. [2024-06-20 15:22:32,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 134 transitions, 1396 flow [2024-06-20 15:22:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:22:32,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:22:32,280 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 1086 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:22:32,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 134 transitions, 1396 flow [2024-06-20 15:22:32,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 134 transitions, 1318 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:32,315 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1108 flow [2024-06-20 15:22:32,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1108, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-20 15:22:32,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 15:22:32,316 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1108 flow [2024-06-20 15:22:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:32,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:32,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:32,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:22:32,317 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:32,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1581300548, now seen corresponding path program 2 times [2024-06-20 15:22:32,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:32,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450884307] [2024-06-20 15:22:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:32,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:32,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:32,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450884307] [2024-06-20 15:22:32,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450884307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:32,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382965457] [2024-06-20 15:22:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:32,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:32,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:32,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:32,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1108 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:32,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:32,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:32,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:32,747 INFO L124 PetriNetUnfolderBase]: 1044/1748 cut-off events. [2024-06-20 15:22:32,747 INFO L125 PetriNetUnfolderBase]: For 30029/30035 co-relation queries the response was YES. [2024-06-20 15:22:32,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1748 events. 1044/1748 cut-off events. For 30029/30035 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9108 event pairs, 320 based on Foata normal form. 8/1749 useless extension candidates. Maximal degree in co-relation 9461. Up to 1489 conditions per place. [2024-06-20 15:22:32,763 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-20 15:22:32,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 1432 flow [2024-06-20 15:22:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:22:32,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:22:32,765 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1108 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:22:32,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 1432 flow [2024-06-20 15:22:32,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 133 transitions, 1330 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:32,804 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 1087 flow [2024-06-20 15:22:32,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1087, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2024-06-20 15:22:32,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-20 15:22:32,805 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 1087 flow [2024-06-20 15:22:32,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:32,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:32,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:22:32,806 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:32,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2123511364, now seen corresponding path program 3 times [2024-06-20 15:22:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720422171] [2024-06-20 15:22:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:32,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:32,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720422171] [2024-06-20 15:22:32,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720422171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:32,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:32,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914922163] [2024-06-20 15:22:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:32,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:32,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:32,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:32,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 1087 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:32,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:32,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:32,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:33,196 INFO L124 PetriNetUnfolderBase]: 1036/1736 cut-off events. [2024-06-20 15:22:33,197 INFO L125 PetriNetUnfolderBase]: For 31485/31491 co-relation queries the response was YES. [2024-06-20 15:22:33,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1736 events. 1036/1736 cut-off events. For 31485/31491 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9061 event pairs, 289 based on Foata normal form. 8/1737 useless extension candidates. Maximal degree in co-relation 9460. Up to 1418 conditions per place. [2024-06-20 15:22:33,213 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-20 15:22:33,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 136 transitions, 1423 flow [2024-06-20 15:22:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:22:33,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:33,216 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 1087 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:22:33,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 136 transitions, 1423 flow [2024-06-20 15:22:33,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 136 transitions, 1360 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:33,259 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 1119 flow [2024-06-20 15:22:33,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-06-20 15:22:33,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-20 15:22:33,260 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 1119 flow [2024-06-20 15:22:33,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:33,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:33,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:22:33,261 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:33,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1153123088, now seen corresponding path program 1 times [2024-06-20 15:22:33,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:33,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134340666] [2024-06-20 15:22:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:33,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:33,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134340666] [2024-06-20 15:22:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134340666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:33,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:33,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:33,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274428519] [2024-06-20 15:22:33,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:33,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:33,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 1119 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:33,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:33,621 INFO L124 PetriNetUnfolderBase]: 1041/1730 cut-off events. [2024-06-20 15:22:33,621 INFO L125 PetriNetUnfolderBase]: For 32573/32573 co-relation queries the response was YES. [2024-06-20 15:22:33,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 1730 events. 1041/1730 cut-off events. For 32573/32573 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8895 event pairs, 301 based on Foata normal form. 1/1727 useless extension candidates. Maximal degree in co-relation 9689. Up to 1539 conditions per place. [2024-06-20 15:22:33,636 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 20 changer transitions 0/138 dead transitions. [2024-06-20 15:22:33,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 138 transitions, 1599 flow [2024-06-20 15:22:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 15:22:33,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:33,638 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 1119 flow. Second operand 5 states and 125 transitions. [2024-06-20 15:22:33,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 138 transitions, 1599 flow [2024-06-20 15:22:33,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 1522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:33,685 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 1208 flow [2024-06-20 15:22:33,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2024-06-20 15:22:33,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 15:22:33,686 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 1208 flow [2024-06-20 15:22:33,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:33,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:22:33,687 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:33,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash -867863842, now seen corresponding path program 2 times [2024-06-20 15:22:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316428901] [2024-06-20 15:22:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:33,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316428901] [2024-06-20 15:22:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316428901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:33,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751907604] [2024-06-20 15:22:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:33,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:33,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:33,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 1208 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:33,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:33,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:34,056 INFO L124 PetriNetUnfolderBase]: 1046/1746 cut-off events. [2024-06-20 15:22:34,057 INFO L125 PetriNetUnfolderBase]: For 35145/35145 co-relation queries the response was YES. [2024-06-20 15:22:34,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 1746 events. 1046/1746 cut-off events. For 35145/35145 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9019 event pairs, 299 based on Foata normal form. 1/1745 useless extension candidates. Maximal degree in co-relation 10012. Up to 1555 conditions per place. [2024-06-20 15:22:34,071 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 117 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-20 15:22:34,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 143 transitions, 1603 flow [2024-06-20 15:22:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:22:34,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-20 15:22:34,073 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 1208 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:22:34,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 143 transitions, 1603 flow [2024-06-20 15:22:34,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 143 transitions, 1537 flow, removed 33 selfloop flow, removed 0 redundant places. [2024-06-20 15:22:34,127 INFO L231 Difference]: Finished difference. Result has 119 places, 127 transitions, 1241 flow [2024-06-20 15:22:34,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1241, PETRI_PLACES=119, PETRI_TRANSITIONS=127} [2024-06-20 15:22:34,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 15:22:34,128 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 127 transitions, 1241 flow [2024-06-20 15:22:34,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:34,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:34,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:34,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:22:34,129 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash 846380170, now seen corresponding path program 1 times [2024-06-20 15:22:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484484931] [2024-06-20 15:22:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484484931] [2024-06-20 15:22:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484484931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:34,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:34,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088080442] [2024-06-20 15:22:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:34,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:34,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:34,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 127 transitions, 1241 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:34,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:34,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:34,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:34,725 INFO L124 PetriNetUnfolderBase]: 1450/2394 cut-off events. [2024-06-20 15:22:34,726 INFO L125 PetriNetUnfolderBase]: For 62810/62810 co-relation queries the response was YES. [2024-06-20 15:22:34,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14367 conditions, 2394 events. 1450/2394 cut-off events. For 62810/62810 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13079 event pairs, 330 based on Foata normal form. 14/2404 useless extension candidates. Maximal degree in co-relation 14309. Up to 1444 conditions per place. [2024-06-20 15:22:34,748 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 133 selfloop transitions, 40 changer transitions 0/181 dead transitions. [2024-06-20 15:22:34,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1931 flow [2024-06-20 15:22:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-20 15:22:34,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-20 15:22:34,750 INFO L175 Difference]: Start difference. First operand has 119 places, 127 transitions, 1241 flow. Second operand 8 states and 220 transitions. [2024-06-20 15:22:34,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1931 flow [2024-06-20 15:22:34,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1899 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:34,843 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1413 flow [2024-06-20 15:22:34,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1413, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-20 15:22:34,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 15:22:34,844 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1413 flow [2024-06-20 15:22:34,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:34,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:34,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:34,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:22:34,844 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:34,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1409380650, now seen corresponding path program 2 times [2024-06-20 15:22:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580113334] [2024-06-20 15:22:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:34,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580113334] [2024-06-20 15:22:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580113334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:34,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:34,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289344615] [2024-06-20 15:22:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:34,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:35,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:35,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1413 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:35,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:35,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:35,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:35,473 INFO L124 PetriNetUnfolderBase]: 1419/2349 cut-off events. [2024-06-20 15:22:35,473 INFO L125 PetriNetUnfolderBase]: For 64230/64230 co-relation queries the response was YES. [2024-06-20 15:22:35,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14497 conditions, 2349 events. 1419/2349 cut-off events. For 64230/64230 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12780 event pairs, 419 based on Foata normal form. 14/2359 useless extension candidates. Maximal degree in co-relation 14437. Up to 2032 conditions per place. [2024-06-20 15:22:35,494 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-20 15:22:35,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 1917 flow [2024-06-20 15:22:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 15:22:35,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:22:35,497 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1413 flow. Second operand 8 states and 212 transitions. [2024-06-20 15:22:35,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 1917 flow [2024-06-20 15:22:35,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1829 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:35,599 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1473 flow [2024-06-20 15:22:35,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1473, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-20 15:22:35,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 15:22:35,600 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1473 flow [2024-06-20 15:22:35,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:35,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:35,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:35,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:22:35,600 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:35,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1580083080, now seen corresponding path program 3 times [2024-06-20 15:22:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:35,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909639286] [2024-06-20 15:22:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:35,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909639286] [2024-06-20 15:22:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909639286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:35,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595045700] [2024-06-20 15:22:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:35,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:35,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1473 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:35,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:35,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:35,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:36,156 INFO L124 PetriNetUnfolderBase]: 1436/2378 cut-off events. [2024-06-20 15:22:36,156 INFO L125 PetriNetUnfolderBase]: For 66644/66644 co-relation queries the response was YES. [2024-06-20 15:22:36,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 2378 events. 1436/2378 cut-off events. For 66644/66644 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13017 event pairs, 423 based on Foata normal form. 4/2377 useless extension candidates. Maximal degree in co-relation 14760. Up to 2026 conditions per place. [2024-06-20 15:22:36,176 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-20 15:22:36,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 166 transitions, 1899 flow [2024-06-20 15:22:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:22:36,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:22:36,179 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1473 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:22:36,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 166 transitions, 1899 flow [2024-06-20 15:22:36,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1793 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:36,329 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1512 flow [2024-06-20 15:22:36,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1512, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2024-06-20 15:22:36,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-20 15:22:36,330 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1512 flow [2024-06-20 15:22:36,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:36,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:36,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:36,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:22:36,331 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:36,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1067821974, now seen corresponding path program 4 times [2024-06-20 15:22:36,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:36,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227981809] [2024-06-20 15:22:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:36,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:36,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227981809] [2024-06-20 15:22:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227981809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:36,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210446909] [2024-06-20 15:22:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:36,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:36,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:36,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:36,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1512 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:36,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:36,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:36,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:36,841 INFO L124 PetriNetUnfolderBase]: 1428/2339 cut-off events. [2024-06-20 15:22:36,841 INFO L125 PetriNetUnfolderBase]: For 69737/69737 co-relation queries the response was YES. [2024-06-20 15:22:36,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14631 conditions, 2339 events. 1428/2339 cut-off events. For 69737/69737 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12751 event pairs, 459 based on Foata normal form. 4/2327 useless extension candidates. Maximal degree in co-relation 14568. Up to 2014 conditions per place. [2024-06-20 15:22:36,857 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 48 changer transitions 0/165 dead transitions. [2024-06-20 15:22:36,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 165 transitions, 1932 flow [2024-06-20 15:22:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:22:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:22:36,858 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1512 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:22:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 165 transitions, 1932 flow [2024-06-20 15:22:36,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 165 transitions, 1803 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:36,933 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1536 flow [2024-06-20 15:22:36,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-20 15:22:36,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 15:22:36,934 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1536 flow [2024-06-20 15:22:36,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:36,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:36,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:36,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:22:36,935 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:36,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash 877155941, now seen corresponding path program 1 times [2024-06-20 15:22:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:36,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130188701] [2024-06-20 15:22:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:36,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:37,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130188701] [2024-06-20 15:22:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130188701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:37,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461839509] [2024-06-20 15:22:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:37,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:37,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1536 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:37,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:37,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:37,374 INFO L124 PetriNetUnfolderBase]: 1433/2376 cut-off events. [2024-06-20 15:22:37,374 INFO L125 PetriNetUnfolderBase]: For 72562/72568 co-relation queries the response was YES. [2024-06-20 15:22:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14823 conditions, 2376 events. 1433/2376 cut-off events. For 72562/72568 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13016 event pairs, 419 based on Foata normal form. 5/2378 useless extension candidates. Maximal degree in co-relation 14759. Up to 2162 conditions per place. [2024-06-20 15:22:37,398 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 125 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-20 15:22:37,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 157 transitions, 1961 flow [2024-06-20 15:22:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 15:22:37,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-20 15:22:37,400 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1536 flow. Second operand 5 states and 124 transitions. [2024-06-20 15:22:37,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 157 transitions, 1961 flow [2024-06-20 15:22:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 157 transitions, 1826 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:37,501 INFO L231 Difference]: Finished difference. Result has 132 places, 144 transitions, 1494 flow [2024-06-20 15:22:37,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1494, PETRI_PLACES=132, PETRI_TRANSITIONS=144} [2024-06-20 15:22:37,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 15:22:37,501 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 144 transitions, 1494 flow [2024-06-20 15:22:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:37,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:37,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:37,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:22:37,502 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:37,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1408326003, now seen corresponding path program 2 times [2024-06-20 15:22:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:37,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295733556] [2024-06-20 15:22:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:37,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295733556] [2024-06-20 15:22:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295733556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:37,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60003623] [2024-06-20 15:22:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:37,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:37,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:37,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 144 transitions, 1494 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:37,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:37,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:37,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:37,979 INFO L124 PetriNetUnfolderBase]: 1430/2368 cut-off events. [2024-06-20 15:22:37,979 INFO L125 PetriNetUnfolderBase]: For 74855/74855 co-relation queries the response was YES. [2024-06-20 15:22:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14650 conditions, 2368 events. 1430/2368 cut-off events. For 74855/74855 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12967 event pairs, 419 based on Foata normal form. 1/2365 useless extension candidates. Maximal degree in co-relation 14585. Up to 2159 conditions per place. [2024-06-20 15:22:37,993 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-06-20 15:22:37,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 158 transitions, 1886 flow [2024-06-20 15:22:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:22:37,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-20 15:22:37,995 INFO L175 Difference]: Start difference. First operand has 132 places, 144 transitions, 1494 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:22:37,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 158 transitions, 1886 flow [2024-06-20 15:22:38,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 158 transitions, 1806 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:38,076 INFO L231 Difference]: Finished difference. Result has 135 places, 144 transitions, 1472 flow [2024-06-20 15:22:38,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1472, PETRI_PLACES=135, PETRI_TRANSITIONS=144} [2024-06-20 15:22:38,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-20 15:22:38,077 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 144 transitions, 1472 flow [2024-06-20 15:22:38,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:38,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:38,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:38,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:22:38,078 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:38,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash 791184635, now seen corresponding path program 1 times [2024-06-20 15:22:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:38,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176010290] [2024-06-20 15:22:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:38,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:38,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:38,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176010290] [2024-06-20 15:22:38,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176010290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:38,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:38,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855670141] [2024-06-20 15:22:38,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:38,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:38,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 144 transitions, 1472 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:38,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:38,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:38,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:38,473 INFO L124 PetriNetUnfolderBase]: 1458/2419 cut-off events. [2024-06-20 15:22:38,473 INFO L125 PetriNetUnfolderBase]: For 81776/81776 co-relation queries the response was YES. [2024-06-20 15:22:38,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15138 conditions, 2419 events. 1458/2419 cut-off events. For 81776/81776 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13394 event pairs, 435 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 15073. Up to 2035 conditions per place. [2024-06-20 15:22:38,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 43 changer transitions 0/180 dead transitions. [2024-06-20 15:22:38,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 2282 flow [2024-06-20 15:22:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:22:38,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:22:38,492 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 1472 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:22:38,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 2282 flow [2024-06-20 15:22:38,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 180 transitions, 2194 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:38,610 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1729 flow [2024-06-20 15:22:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2024-06-20 15:22:38,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-20 15:22:38,611 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1729 flow [2024-06-20 15:22:38,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:38,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:38,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:22:38,612 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1477742069, now seen corresponding path program 3 times [2024-06-20 15:22:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986745639] [2024-06-20 15:22:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:38,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986745639] [2024-06-20 15:22:38,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986745639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:38,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:38,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:22:38,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663574903] [2024-06-20 15:22:38,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:38,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:22:38,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:22:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:22:38,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:38,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1729 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:38,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:38,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:39,081 INFO L124 PetriNetUnfolderBase]: 1455/2409 cut-off events. [2024-06-20 15:22:39,081 INFO L125 PetriNetUnfolderBase]: For 85932/85932 co-relation queries the response was YES. [2024-06-20 15:22:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15807 conditions, 2409 events. 1455/2409 cut-off events. For 85932/85932 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13202 event pairs, 411 based on Foata normal form. 1/2408 useless extension candidates. Maximal degree in co-relation 15740. Up to 2204 conditions per place. [2024-06-20 15:22:39,098 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2024-06-20 15:22:39,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 175 transitions, 2101 flow [2024-06-20 15:22:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 15:22:39,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-20 15:22:39,099 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1729 flow. Second operand 5 states and 126 transitions. [2024-06-20 15:22:39,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 175 transitions, 2101 flow [2024-06-20 15:22:39,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 175 transitions, 2023 flow, removed 39 selfloop flow, removed 0 redundant places. [2024-06-20 15:22:39,201 INFO L231 Difference]: Finished difference. Result has 142 places, 160 transitions, 1697 flow [2024-06-20 15:22:39,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1697, PETRI_PLACES=142, PETRI_TRANSITIONS=160} [2024-06-20 15:22:39,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-20 15:22:39,202 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 160 transitions, 1697 flow [2024-06-20 15:22:39,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:39,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:39,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:39,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:22:39,203 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1462785995, now seen corresponding path program 2 times [2024-06-20 15:22:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728209544] [2024-06-20 15:22:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:39,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:39,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728209544] [2024-06-20 15:22:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728209544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:39,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668011543] [2024-06-20 15:22:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:39,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:39,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 160 transitions, 1697 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:39,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:39,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:39,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:39,717 INFO L124 PetriNetUnfolderBase]: 1526/2530 cut-off events. [2024-06-20 15:22:39,717 INFO L125 PetriNetUnfolderBase]: For 94766/94766 co-relation queries the response was YES. [2024-06-20 15:22:39,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16628 conditions, 2530 events. 1526/2530 cut-off events. For 94766/94766 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14143 event pairs, 431 based on Foata normal form. 3/2527 useless extension candidates. Maximal degree in co-relation 16558. Up to 2094 conditions per place. [2024-06-20 15:22:39,744 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-20 15:22:39,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 199 transitions, 2558 flow [2024-06-20 15:22:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:22:39,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:22:39,746 INFO L175 Difference]: Start difference. First operand has 142 places, 160 transitions, 1697 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:22:39,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 199 transitions, 2558 flow [2024-06-20 15:22:39,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 199 transitions, 2522 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:39,863 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2137 flow [2024-06-20 15:22:39,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2137, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-20 15:22:39,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-20 15:22:39,864 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2137 flow [2024-06-20 15:22:39,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:39,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:39,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:39,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:22:39,865 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:39,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1462548845, now seen corresponding path program 3 times [2024-06-20 15:22:39,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:39,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846803260] [2024-06-20 15:22:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:39,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:39,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846803260] [2024-06-20 15:22:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846803260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:39,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:39,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100184212] [2024-06-20 15:22:39,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:39,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:39,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:39,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:40,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:40,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2137 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:40,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:40,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:40,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:40,344 INFO L124 PetriNetUnfolderBase]: 1519/2526 cut-off events. [2024-06-20 15:22:40,344 INFO L125 PetriNetUnfolderBase]: For 101352/101352 co-relation queries the response was YES. [2024-06-20 15:22:40,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17508 conditions, 2526 events. 1519/2526 cut-off events. For 101352/101352 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14187 event pairs, 432 based on Foata normal form. 3/2523 useless extension candidates. Maximal degree in co-relation 17435. Up to 2091 conditions per place. [2024-06-20 15:22:40,366 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 74 changer transitions 0/205 dead transitions. [2024-06-20 15:22:40,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 205 transitions, 2843 flow [2024-06-20 15:22:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:22:40,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-20 15:22:40,367 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2137 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:22:40,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 205 transitions, 2843 flow [2024-06-20 15:22:40,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 205 transitions, 2668 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:40,509 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2281 flow [2024-06-20 15:22:40,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-20 15:22:40,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 15:22:40,510 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2281 flow [2024-06-20 15:22:40,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:40,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:40,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:40,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:22:40,511 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:40,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1462794923, now seen corresponding path program 1 times [2024-06-20 15:22:40,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:40,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265900516] [2024-06-20 15:22:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:40,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:40,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:40,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265900516] [2024-06-20 15:22:40,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265900516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:40,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:40,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378813848] [2024-06-20 15:22:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:40,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:40,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:40,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:22:40,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2281 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) [2024-06-20 15:22:40,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:40,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:22:40,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:41,030 INFO L124 PetriNetUnfolderBase]: 1485/2500 cut-off events. [2024-06-20 15:22:41,031 INFO L125 PetriNetUnfolderBase]: For 110686/110691 co-relation queries the response was YES. [2024-06-20 15:22:41,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 2500 events. 1485/2500 cut-off events. For 110686/110691 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14216 event pairs, 427 based on Foata normal form. 17/2506 useless extension candidates. Maximal degree in co-relation 17399. Up to 2109 conditions per place. [2024-06-20 15:22:41,051 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 153 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-20 15:22:41,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 201 transitions, 2699 flow [2024-06-20 15:22:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:22:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:22:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:22:41,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-20 15:22:41,052 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2281 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:22:41,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 201 transitions, 2699 flow [2024-06-20 15:22:41,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 2570 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:41,191 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 2229 flow [2024-06-20 15:22:41,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2229, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-06-20 15:22:41,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-20 15:22:41,192 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 2229 flow [2024-06-20 15:22:41,192 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) [2024-06-20 15:22:41,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:41,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:41,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:22:41,192 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:41,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1532118627, now seen corresponding path program 1 times [2024-06-20 15:22:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:41,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105899040] [2024-06-20 15:22:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:41,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:41,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105899040] [2024-06-20 15:22:41,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105899040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:41,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:41,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390514490] [2024-06-20 15:22:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:41,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:41,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:41,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 2229 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:41,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:41,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:41,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:41,767 INFO L124 PetriNetUnfolderBase]: 1679/2816 cut-off events. [2024-06-20 15:22:41,768 INFO L125 PetriNetUnfolderBase]: For 135834/135834 co-relation queries the response was YES. [2024-06-20 15:22:41,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18898 conditions, 2816 events. 1679/2816 cut-off events. For 135834/135834 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16102 event pairs, 327 based on Foata normal form. 42/2854 useless extension candidates. Maximal degree in co-relation 18822. Up to 1655 conditions per place. [2024-06-20 15:22:41,792 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 44 changer transitions 5/238 dead transitions. [2024-06-20 15:22:41,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 238 transitions, 3028 flow [2024-06-20 15:22:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-20 15:22:41,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2024-06-20 15:22:41,793 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 2229 flow. Second operand 8 states and 221 transitions. [2024-06-20 15:22:41,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 238 transitions, 3028 flow [2024-06-20 15:22:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 238 transitions, 2973 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:41,972 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 2281 flow [2024-06-20 15:22:41,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2281, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-20 15:22:41,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-20 15:22:41,973 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 2281 flow [2024-06-20 15:22:41,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:41,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:41,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:41,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:22:41,974 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:41,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1619179585, now seen corresponding path program 2 times [2024-06-20 15:22:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:41,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131821471] [2024-06-20 15:22:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:41,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:42,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:42,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131821471] [2024-06-20 15:22:42,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131821471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:42,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:42,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:42,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785507193] [2024-06-20 15:22:42,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:42,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:42,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:42,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 2281 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:42,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:42,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:42,491 INFO L124 PetriNetUnfolderBase]: 1534/2585 cut-off events. [2024-06-20 15:22:42,491 INFO L125 PetriNetUnfolderBase]: For 115736/115736 co-relation queries the response was YES. [2024-06-20 15:22:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2585 events. 1534/2585 cut-off events. For 115736/115736 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14556 event pairs, 390 based on Foata normal form. 50/2631 useless extension candidates. Maximal degree in co-relation 16468. Up to 2021 conditions per place. [2024-06-20 15:22:42,510 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 36 changer transitions 3/229 dead transitions. [2024-06-20 15:22:42,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 229 transitions, 2887 flow [2024-06-20 15:22:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:22:42,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-20 15:22:42,511 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 2281 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:22:42,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 229 transitions, 2887 flow [2024-06-20 15:22:42,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 229 transitions, 2770 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:42,647 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 2258 flow [2024-06-20 15:22:42,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2258, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-20 15:22:42,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-20 15:22:42,648 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 2258 flow [2024-06-20 15:22:42,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:42,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:42,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:42,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:22:42,648 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:42,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1937386207, now seen corresponding path program 3 times [2024-06-20 15:22:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:42,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858694983] [2024-06-20 15:22:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:42,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:42,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858694983] [2024-06-20 15:22:42,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858694983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:42,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:42,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:42,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107210304] [2024-06-20 15:22:42,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:42,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:42,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 2258 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:42,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:42,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:42,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:43,234 INFO L124 PetriNetUnfolderBase]: 1582/2681 cut-off events. [2024-06-20 15:22:43,234 INFO L125 PetriNetUnfolderBase]: For 99088/99088 co-relation queries the response was YES. [2024-06-20 15:22:43,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16848 conditions, 2681 events. 1582/2681 cut-off events. For 99088/99088 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15293 event pairs, 411 based on Foata normal form. 16/2692 useless extension candidates. Maximal degree in co-relation 16770. Up to 2200 conditions per place. [2024-06-20 15:22:43,252 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-20 15:22:43,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 219 transitions, 2798 flow [2024-06-20 15:22:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:22:43,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:22:43,254 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 2258 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:22:43,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 219 transitions, 2798 flow [2024-06-20 15:22:43,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 219 transitions, 2726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:43,404 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2311 flow [2024-06-20 15:22:43,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2311, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-06-20 15:22:43,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-20 15:22:43,405 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2311 flow [2024-06-20 15:22:43,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:43,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:43,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:43,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:22:43,405 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:43,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash 675601279, now seen corresponding path program 4 times [2024-06-20 15:22:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:43,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660345662] [2024-06-20 15:22:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:43,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:43,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660345662] [2024-06-20 15:22:43,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660345662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:43,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:43,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:43,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23549265] [2024-06-20 15:22:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:43,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:43,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:43,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:43,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2311 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:43,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:43,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:43,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:43,977 INFO L124 PetriNetUnfolderBase]: 1640/2787 cut-off events. [2024-06-20 15:22:43,977 INFO L125 PetriNetUnfolderBase]: For 105268/105268 co-relation queries the response was YES. [2024-06-20 15:22:43,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 2787 events. 1640/2787 cut-off events. For 105268/105268 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16060 event pairs, 426 based on Foata normal form. 16/2798 useless extension candidates. Maximal degree in co-relation 17437. Up to 2298 conditions per place. [2024-06-20 15:22:43,999 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 45 changer transitions 0/224 dead transitions. [2024-06-20 15:22:43,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 224 transitions, 2873 flow [2024-06-20 15:22:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:22:44,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:22:44,000 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2311 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:22:44,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 224 transitions, 2873 flow [2024-06-20 15:22:44,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 224 transitions, 2766 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:44,149 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2331 flow [2024-06-20 15:22:44,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-20 15:22:44,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-20 15:22:44,150 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2331 flow [2024-06-20 15:22:44,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:44,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:44,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:44,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:22:44,150 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:44,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:44,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2100199249, now seen corresponding path program 5 times [2024-06-20 15:22:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:44,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169065149] [2024-06-20 15:22:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:44,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:44,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:44,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169065149] [2024-06-20 15:22:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169065149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:44,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:44,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:44,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053211776] [2024-06-20 15:22:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:44,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:44,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:44,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:44,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2331 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:44,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:44,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:44,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:44,745 INFO L124 PetriNetUnfolderBase]: 1681/2858 cut-off events. [2024-06-20 15:22:44,745 INFO L125 PetriNetUnfolderBase]: For 107942/107942 co-relation queries the response was YES. [2024-06-20 15:22:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17889 conditions, 2858 events. 1681/2858 cut-off events. For 107942/107942 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16653 event pairs, 421 based on Foata normal form. 12/2865 useless extension candidates. Maximal degree in co-relation 17809. Up to 2282 conditions per place. [2024-06-20 15:22:44,768 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 48 changer transitions 0/232 dead transitions. [2024-06-20 15:22:44,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 232 transitions, 2937 flow [2024-06-20 15:22:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 15:22:44,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:44,772 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2331 flow. Second operand 9 states and 225 transitions. [2024-06-20 15:22:44,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 232 transitions, 2937 flow [2024-06-20 15:22:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 232 transitions, 2828 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:44,923 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2356 flow [2024-06-20 15:22:44,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-20 15:22:44,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 15:22:44,924 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2356 flow [2024-06-20 15:22:44,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:44,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:44,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:44,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:22:44,924 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:44,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash 903816141, now seen corresponding path program 1 times [2024-06-20 15:22:44,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:44,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274924140] [2024-06-20 15:22:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:45,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:45,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274924140] [2024-06-20 15:22:45,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274924140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:45,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:45,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:45,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8949443] [2024-06-20 15:22:45,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:45,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:45,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:45,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:45,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:45,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2356 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:45,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:45,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:45,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:45,476 INFO L124 PetriNetUnfolderBase]: 1808/3091 cut-off events. [2024-06-20 15:22:45,476 INFO L125 PetriNetUnfolderBase]: For 125389/125389 co-relation queries the response was YES. [2024-06-20 15:22:45,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3091 events. 1808/3091 cut-off events. For 125389/125389 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18459 event pairs, 463 based on Foata normal form. 12/3098 useless extension candidates. Maximal degree in co-relation 19555. Up to 2183 conditions per place. [2024-06-20 15:22:45,503 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 50 changer transitions 0/228 dead transitions. [2024-06-20 15:22:45,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 228 transitions, 3110 flow [2024-06-20 15:22:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:22:45,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:22:45,505 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2356 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:22:45,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 228 transitions, 3110 flow [2024-06-20 15:22:45,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 2990 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:45,757 INFO L231 Difference]: Finished difference. Result has 169 places, 193 transitions, 2408 flow [2024-06-20 15:22:45,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=169, PETRI_TRANSITIONS=193} [2024-06-20 15:22:45,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 15:22:45,758 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 193 transitions, 2408 flow [2024-06-20 15:22:45,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:45,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:45,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:22:45,758 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:45,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1734179375, now seen corresponding path program 1 times [2024-06-20 15:22:45,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:45,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255840015] [2024-06-20 15:22:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:45,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255840015] [2024-06-20 15:22:45,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255840015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:45,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:45,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460374343] [2024-06-20 15:22:45,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:45,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 193 transitions, 2408 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:45,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:45,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:45,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:46,342 INFO L124 PetriNetUnfolderBase]: 1837/3117 cut-off events. [2024-06-20 15:22:46,342 INFO L125 PetriNetUnfolderBase]: For 125591/125591 co-relation queries the response was YES. [2024-06-20 15:22:46,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20184 conditions, 3117 events. 1837/3117 cut-off events. For 125591/125591 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18528 event pairs, 492 based on Foata normal form. 1/3109 useless extension candidates. Maximal degree in co-relation 20102. Up to 2635 conditions per place. [2024-06-20 15:22:46,367 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 68 changer transitions 0/227 dead transitions. [2024-06-20 15:22:46,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3358 flow [2024-06-20 15:22:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:22:46,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:22:46,368 INFO L175 Difference]: Start difference. First operand has 169 places, 193 transitions, 2408 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:22:46,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3358 flow [2024-06-20 15:22:46,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 227 transitions, 3275 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:46,543 INFO L231 Difference]: Finished difference. Result has 175 places, 205 transitions, 2779 flow [2024-06-20 15:22:46,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2779, PETRI_PLACES=175, PETRI_TRANSITIONS=205} [2024-06-20 15:22:46,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-20 15:22:46,544 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 205 transitions, 2779 flow [2024-06-20 15:22:46,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:46,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:46,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:46,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:22:46,545 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:46,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1739893295, now seen corresponding path program 2 times [2024-06-20 15:22:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:46,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876581917] [2024-06-20 15:22:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:46,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876581917] [2024-06-20 15:22:46,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876581917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:46,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:46,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:46,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132078858] [2024-06-20 15:22:46,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:46,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:46,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 205 transitions, 2779 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:46,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:46,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:46,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:47,128 INFO L124 PetriNetUnfolderBase]: 1870/3176 cut-off events. [2024-06-20 15:22:47,128 INFO L125 PetriNetUnfolderBase]: For 131225/131225 co-relation queries the response was YES. [2024-06-20 15:22:47,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3176 events. 1870/3176 cut-off events. For 131225/131225 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18958 event pairs, 473 based on Foata normal form. 1/3173 useless extension candidates. Maximal degree in co-relation 21055. Up to 2840 conditions per place. [2024-06-20 15:22:47,157 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 39 changer transitions 0/242 dead transitions. [2024-06-20 15:22:47,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 242 transitions, 3707 flow [2024-06-20 15:22:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:22:47,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:22:47,158 INFO L175 Difference]: Start difference. First operand has 175 places, 205 transitions, 2779 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:22:47,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 242 transitions, 3707 flow [2024-06-20 15:22:47,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 242 transitions, 3592 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-20 15:22:47,368 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 3085 flow [2024-06-20 15:22:47,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2024-06-20 15:22:47,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 15:22:47,369 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3085 flow [2024-06-20 15:22:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:47,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:47,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:47,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:22:47,370 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:47,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1246037629, now seen corresponding path program 6 times [2024-06-20 15:22:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:47,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620656872] [2024-06-20 15:22:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:47,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:47,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620656872] [2024-06-20 15:22:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620656872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:47,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:47,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:47,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980527146] [2024-06-20 15:22:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:47,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:47,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:47,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:47,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:47,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:47,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:47,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:48,056 INFO L124 PetriNetUnfolderBase]: 1928/3277 cut-off events. [2024-06-20 15:22:48,056 INFO L125 PetriNetUnfolderBase]: For 150766/150772 co-relation queries the response was YES. [2024-06-20 15:22:48,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21725 conditions, 3277 events. 1928/3277 cut-off events. For 150766/150772 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19857 event pairs, 522 based on Foata normal form. 20/3286 useless extension candidates. Maximal degree in co-relation 21635. Up to 2766 conditions per place. [2024-06-20 15:22:48,084 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 44 changer transitions 0/250 dead transitions. [2024-06-20 15:22:48,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 3687 flow [2024-06-20 15:22:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:22:48,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:48,087 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 3085 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:22:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 3687 flow [2024-06-20 15:22:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 250 transitions, 3590 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:48,325 INFO L231 Difference]: Finished difference. Result has 187 places, 223 transitions, 3119 flow [2024-06-20 15:22:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3119, PETRI_PLACES=187, PETRI_TRANSITIONS=223} [2024-06-20 15:22:48,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-20 15:22:48,325 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 223 transitions, 3119 flow [2024-06-20 15:22:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:48,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:22:48,326 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1257406367, now seen corresponding path program 7 times [2024-06-20 15:22:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117034732] [2024-06-20 15:22:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117034732] [2024-06-20 15:22:48,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117034732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:48,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:48,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:48,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589076670] [2024-06-20 15:22:48,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:48,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:48,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:48,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 223 transitions, 3119 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:48,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:48,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:49,005 INFO L124 PetriNetUnfolderBase]: 1900/3218 cut-off events. [2024-06-20 15:22:49,005 INFO L125 PetriNetUnfolderBase]: For 145049/145049 co-relation queries the response was YES. [2024-06-20 15:22:49,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21068 conditions, 3218 events. 1900/3218 cut-off events. For 145049/145049 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19356 event pairs, 510 based on Foata normal form. 16/3220 useless extension candidates. Maximal degree in co-relation 20977. Up to 2722 conditions per place. [2024-06-20 15:22:49,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 47 changer transitions 0/254 dead transitions. [2024-06-20 15:22:49,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 3705 flow [2024-06-20 15:22:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:22:49,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:22:49,033 INFO L175 Difference]: Start difference. First operand has 187 places, 223 transitions, 3119 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:22:49,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 3705 flow [2024-06-20 15:22:49,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 3578 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:49,253 INFO L231 Difference]: Finished difference. Result has 190 places, 223 transitions, 3093 flow [2024-06-20 15:22:49,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=190, PETRI_TRANSITIONS=223} [2024-06-20 15:22:49,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-20 15:22:49,254 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 223 transitions, 3093 flow [2024-06-20 15:22:49,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:49,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:49,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:22:49,254 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:49,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -899415367, now seen corresponding path program 8 times [2024-06-20 15:22:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172715509] [2024-06-20 15:22:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172715509] [2024-06-20 15:22:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172715509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:49,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:49,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:49,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692162667] [2024-06-20 15:22:49,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:49,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:49,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:49,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 223 transitions, 3093 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:49,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:49,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:49,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:49,872 INFO L124 PetriNetUnfolderBase]: 1916/3250 cut-off events. [2024-06-20 15:22:49,872 INFO L125 PetriNetUnfolderBase]: For 142247/142247 co-relation queries the response was YES. [2024-06-20 15:22:49,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3250 events. 1916/3250 cut-off events. For 142247/142247 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19583 event pairs, 503 based on Foata normal form. 12/3248 useless extension candidates. Maximal degree in co-relation 20794. Up to 2667 conditions per place. [2024-06-20 15:22:49,900 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2024-06-20 15:22:49,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 262 transitions, 3757 flow [2024-06-20 15:22:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 15:22:49,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-20 15:22:49,905 INFO L175 Difference]: Start difference. First operand has 190 places, 223 transitions, 3093 flow. Second operand 9 states and 221 transitions. [2024-06-20 15:22:49,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 262 transitions, 3757 flow [2024-06-20 15:22:50,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 262 transitions, 3662 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:50,131 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3142 flow [2024-06-20 15:22:50,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3142, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-20 15:22:50,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:22:50,132 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3142 flow [2024-06-20 15:22:50,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:50,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:50,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:50,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:22:50,132 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:50,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1025244427, now seen corresponding path program 2 times [2024-06-20 15:22:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:50,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746873754] [2024-06-20 15:22:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:50,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:50,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746873754] [2024-06-20 15:22:50,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746873754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:50,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:50,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:50,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489973825] [2024-06-20 15:22:50,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:50,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:50,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:50,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3142 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:50,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:50,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:50,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:50,748 INFO L124 PetriNetUnfolderBase]: 1957/3346 cut-off events. [2024-06-20 15:22:50,748 INFO L125 PetriNetUnfolderBase]: For 150839/150845 co-relation queries the response was YES. [2024-06-20 15:22:50,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21439 conditions, 3346 events. 1957/3346 cut-off events. For 150839/150845 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20470 event pairs, 514 based on Foata normal form. 16/3351 useless extension candidates. Maximal degree in co-relation 21346. Up to 2738 conditions per place. [2024-06-20 15:22:50,773 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 46 changer transitions 0/255 dead transitions. [2024-06-20 15:22:50,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3772 flow [2024-06-20 15:22:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:22:50,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:22:50,775 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3142 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:22:50,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3772 flow [2024-06-20 15:22:51,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3642 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:51,079 INFO L231 Difference]: Finished difference. Result has 194 places, 225 transitions, 3150 flow [2024-06-20 15:22:51,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3150, PETRI_PLACES=194, PETRI_TRANSITIONS=225} [2024-06-20 15:22:51,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:22:51,079 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 225 transitions, 3150 flow [2024-06-20 15:22:51,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:51,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:51,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:51,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:22:51,080 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:51,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash -584919781, now seen corresponding path program 3 times [2024-06-20 15:22:51,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:51,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468125619] [2024-06-20 15:22:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:51,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:51,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468125619] [2024-06-20 15:22:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468125619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:51,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:51,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399410830] [2024-06-20 15:22:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:51,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:51,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:51,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 225 transitions, 3150 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:51,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:51,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:51,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:51,668 INFO L124 PetriNetUnfolderBase]: 1937/3314 cut-off events. [2024-06-20 15:22:51,669 INFO L125 PetriNetUnfolderBase]: For 144062/144068 co-relation queries the response was YES. [2024-06-20 15:22:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 3314 events. 1937/3314 cut-off events. For 144062/144068 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20318 event pairs, 459 based on Foata normal form. 16/3319 useless extension candidates. Maximal degree in co-relation 20598. Up to 2141 conditions per place. [2024-06-20 15:22:51,695 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 55 changer transitions 0/255 dead transitions. [2024-06-20 15:22:51,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 255 transitions, 3672 flow [2024-06-20 15:22:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:51,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:22:51,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:22:51,696 INFO L175 Difference]: Start difference. First operand has 194 places, 225 transitions, 3150 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:22:51,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 255 transitions, 3672 flow [2024-06-20 15:22:51,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3542 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:51,997 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3062 flow [2024-06-20 15:22:51,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-20 15:22:51,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:22:51,998 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3062 flow [2024-06-20 15:22:51,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:51,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:51,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:51,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:22:51,998 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:51,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash 548871599, now seen corresponding path program 3 times [2024-06-20 15:22:51,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:51,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765449462] [2024-06-20 15:22:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:51,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765449462] [2024-06-20 15:22:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765449462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390041397] [2024-06-20 15:22:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:52,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:52,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3062 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:52,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:52,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:52,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:52,548 INFO L124 PetriNetUnfolderBase]: 1942/3304 cut-off events. [2024-06-20 15:22:52,548 INFO L125 PetriNetUnfolderBase]: For 131451/131451 co-relation queries the response was YES. [2024-06-20 15:22:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20656 conditions, 3304 events. 1942/3304 cut-off events. For 131451/131451 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20041 event pairs, 509 based on Foata normal form. 1/3297 useless extension candidates. Maximal degree in co-relation 20562. Up to 2793 conditions per place. [2024-06-20 15:22:52,574 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 74 changer transitions 0/246 dead transitions. [2024-06-20 15:22:52,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 3927 flow [2024-06-20 15:22:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:22:52,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:22:52,575 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3062 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:22:52,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 3927 flow [2024-06-20 15:22:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 246 transitions, 3751 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:52,813 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 3101 flow [2024-06-20 15:22:52,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-20 15:22:52,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:22:52,814 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 3101 flow [2024-06-20 15:22:52,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:52,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:52,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:52,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:22:52,814 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:52,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 118420861, now seen corresponding path program 4 times [2024-06-20 15:22:52,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204478382] [2024-06-20 15:22:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:52,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:52,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204478382] [2024-06-20 15:22:52,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204478382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:52,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:52,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:52,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362391008] [2024-06-20 15:22:52,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:52,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:52,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:52,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:52,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 3101 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:52,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:52,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:52,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:53,332 INFO L124 PetriNetUnfolderBase]: 1934/3292 cut-off events. [2024-06-20 15:22:53,333 INFO L125 PetriNetUnfolderBase]: For 132811/132811 co-relation queries the response was YES. [2024-06-20 15:22:53,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20194 conditions, 3292 events. 1934/3292 cut-off events. For 132811/132811 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19963 event pairs, 508 based on Foata normal form. 2/3286 useless extension candidates. Maximal degree in co-relation 20100. Up to 2788 conditions per place. [2024-06-20 15:22:53,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 70 changer transitions 0/242 dead transitions. [2024-06-20 15:22:53,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 242 transitions, 3797 flow [2024-06-20 15:22:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:22:53,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:53,364 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 3101 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:22:53,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 242 transitions, 3797 flow [2024-06-20 15:22:53,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 242 transitions, 3603 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-20 15:22:53,622 INFO L231 Difference]: Finished difference. Result has 197 places, 227 transitions, 3055 flow [2024-06-20 15:22:53,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3055, PETRI_PLACES=197, PETRI_TRANSITIONS=227} [2024-06-20 15:22:53,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-20 15:22:53,622 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 227 transitions, 3055 flow [2024-06-20 15:22:53,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:53,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:53,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:53,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:22:53,623 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:53,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash -793475779, now seen corresponding path program 5 times [2024-06-20 15:22:53,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:53,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556872720] [2024-06-20 15:22:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:53,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:53,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556872720] [2024-06-20 15:22:53,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556872720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:53,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:53,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728201331] [2024-06-20 15:22:53,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:53,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:53,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:53,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:53,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 227 transitions, 3055 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:53,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:53,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:53,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:54,209 INFO L124 PetriNetUnfolderBase]: 1928/3286 cut-off events. [2024-06-20 15:22:54,210 INFO L125 PetriNetUnfolderBase]: For 134049/134049 co-relation queries the response was YES. [2024-06-20 15:22:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19957 conditions, 3286 events. 1928/3286 cut-off events. For 134049/134049 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19959 event pairs, 500 based on Foata normal form. 2/3282 useless extension candidates. Maximal degree in co-relation 19863. Up to 2767 conditions per place. [2024-06-20 15:22:54,240 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 155 selfloop transitions, 86 changer transitions 0/249 dead transitions. [2024-06-20 15:22:54,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 3806 flow [2024-06-20 15:22:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 15:22:54,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-20 15:22:54,241 INFO L175 Difference]: Start difference. First operand has 197 places, 227 transitions, 3055 flow. Second operand 6 states and 160 transitions. [2024-06-20 15:22:54,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 3806 flow [2024-06-20 15:22:54,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 249 transitions, 3612 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:54,520 INFO L231 Difference]: Finished difference. Result has 197 places, 227 transitions, 3048 flow [2024-06-20 15:22:54,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3048, PETRI_PLACES=197, PETRI_TRANSITIONS=227} [2024-06-20 15:22:54,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-20 15:22:54,520 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 227 transitions, 3048 flow [2024-06-20 15:22:54,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:54,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:54,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:22:54,521 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:54,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1912306031, now seen corresponding path program 6 times [2024-06-20 15:22:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831418482] [2024-06-20 15:22:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:54,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831418482] [2024-06-20 15:22:54,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831418482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:54,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:54,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:54,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923743682] [2024-06-20 15:22:54,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:54,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:54,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:54,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:54,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 227 transitions, 3048 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:54,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:54,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:54,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:55,093 INFO L124 PetriNetUnfolderBase]: 1920/3283 cut-off events. [2024-06-20 15:22:55,093 INFO L125 PetriNetUnfolderBase]: For 135025/135025 co-relation queries the response was YES. [2024-06-20 15:22:55,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19834 conditions, 3283 events. 1920/3283 cut-off events. For 135025/135025 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19891 event pairs, 479 based on Foata normal form. 2/3281 useless extension candidates. Maximal degree in co-relation 19739. Up to 2762 conditions per place. [2024-06-20 15:22:55,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 96 changer transitions 0/256 dead transitions. [2024-06-20 15:22:55,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 256 transitions, 3833 flow [2024-06-20 15:22:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-20 15:22:55,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-20 15:22:55,124 INFO L175 Difference]: Start difference. First operand has 197 places, 227 transitions, 3048 flow. Second operand 7 states and 190 transitions. [2024-06-20 15:22:55,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 256 transitions, 3833 flow [2024-06-20 15:22:55,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 256 transitions, 3574 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:55,431 INFO L231 Difference]: Finished difference. Result has 198 places, 227 transitions, 3008 flow [2024-06-20 15:22:55,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=198, PETRI_TRANSITIONS=227} [2024-06-20 15:22:55,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-20 15:22:55,432 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 227 transitions, 3008 flow [2024-06-20 15:22:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:55,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:55,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:55,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:22:55,433 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:55,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash 114710874, now seen corresponding path program 1 times [2024-06-20 15:22:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:55,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977968902] [2024-06-20 15:22:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:55,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:55,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:55,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977968902] [2024-06-20 15:22:55,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977968902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:55,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:55,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:55,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104162526] [2024-06-20 15:22:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:55,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:55,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:55,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 227 transitions, 3008 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:55,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:55,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:56,041 INFO L124 PetriNetUnfolderBase]: 1948/3328 cut-off events. [2024-06-20 15:22:56,041 INFO L125 PetriNetUnfolderBase]: For 144297/144303 co-relation queries the response was YES. [2024-06-20 15:22:56,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20323 conditions, 3328 events. 1948/3328 cut-off events. For 144297/144303 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20328 event pairs, 513 based on Foata normal form. 6/3327 useless extension candidates. Maximal degree in co-relation 20227. Up to 2808 conditions per place. [2024-06-20 15:22:56,066 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-20 15:22:56,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 251 transitions, 3879 flow [2024-06-20 15:22:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:22:56,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:56,068 INFO L175 Difference]: Start difference. First operand has 198 places, 227 transitions, 3008 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:22:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 251 transitions, 3879 flow [2024-06-20 15:22:56,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 251 transitions, 3664 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:56,363 INFO L231 Difference]: Finished difference. Result has 199 places, 236 transitions, 3106 flow [2024-06-20 15:22:56,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=199, PETRI_TRANSITIONS=236} [2024-06-20 15:22:56,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-20 15:22:56,363 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 236 transitions, 3106 flow [2024-06-20 15:22:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:56,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:56,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:56,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:22:56,364 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:56,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash 708439832, now seen corresponding path program 2 times [2024-06-20 15:22:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:56,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318254656] [2024-06-20 15:22:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:56,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:56,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318254656] [2024-06-20 15:22:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318254656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:56,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482070652] [2024-06-20 15:22:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:56,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:56,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 236 transitions, 3106 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:56,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:56,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:56,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:56,924 INFO L124 PetriNetUnfolderBase]: 1958/3338 cut-off events. [2024-06-20 15:22:56,924 INFO L125 PetriNetUnfolderBase]: For 143504/143504 co-relation queries the response was YES. [2024-06-20 15:22:56,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20443 conditions, 3338 events. 1958/3338 cut-off events. For 143504/143504 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20416 event pairs, 506 based on Foata normal form. 2/3332 useless extension candidates. Maximal degree in co-relation 20345. Up to 2818 conditions per place. [2024-06-20 15:22:56,953 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 86 changer transitions 0/259 dead transitions. [2024-06-20 15:22:56,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 259 transitions, 4027 flow [2024-06-20 15:22:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-20 15:22:56,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-20 15:22:56,955 INFO L175 Difference]: Start difference. First operand has 199 places, 236 transitions, 3106 flow. Second operand 9 states and 212 transitions. [2024-06-20 15:22:56,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 259 transitions, 4027 flow [2024-06-20 15:22:57,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3888 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 15:22:57,207 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 3215 flow [2024-06-20 15:22:57,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3215, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-20 15:22:57,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 15:22:57,207 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 3215 flow [2024-06-20 15:22:57,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:57,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:57,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:22:57,208 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:57,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash -437109334, now seen corresponding path program 3 times [2024-06-20 15:22:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005040048] [2024-06-20 15:22:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:57,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:57,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005040048] [2024-06-20 15:22:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005040048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:57,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:57,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992713905] [2024-06-20 15:22:57,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:57,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:57,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:57,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 3215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:57,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:57,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:57,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:57,756 INFO L124 PetriNetUnfolderBase]: 1954/3334 cut-off events. [2024-06-20 15:22:57,756 INFO L125 PetriNetUnfolderBase]: For 146531/146531 co-relation queries the response was YES. [2024-06-20 15:22:57,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20344 conditions, 3334 events. 1954/3334 cut-off events. For 146531/146531 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20358 event pairs, 507 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 20245. Up to 2816 conditions per place. [2024-06-20 15:22:57,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 80 changer transitions 0/256 dead transitions. [2024-06-20 15:22:57,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3957 flow [2024-06-20 15:22:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:22:57,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:22:57,789 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 3215 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:22:57,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3957 flow [2024-06-20 15:22:58,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 256 transitions, 3671 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:58,150 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 3097 flow [2024-06-20 15:22:58,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3097, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-20 15:22:58,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 15:22:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 3097 flow [2024-06-20 15:22:58,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:58,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:58,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:58,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:22:58,152 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:58,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:58,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1905630708, now seen corresponding path program 4 times [2024-06-20 15:22:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:58,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569607234] [2024-06-20 15:22:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:58,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569607234] [2024-06-20 15:22:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569607234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:58,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:58,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:58,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112951029] [2024-06-20 15:22:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:58,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:58,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:58,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:58,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 3097 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:58,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:58,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:58,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:58,730 INFO L124 PetriNetUnfolderBase]: 1971/3367 cut-off events. [2024-06-20 15:22:58,730 INFO L125 PetriNetUnfolderBase]: For 151789/151789 co-relation queries the response was YES. [2024-06-20 15:22:58,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20409 conditions, 3367 events. 1971/3367 cut-off events. For 151789/151789 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20580 event pairs, 496 based on Foata normal form. 3/3364 useless extension candidates. Maximal degree in co-relation 20311. Up to 2829 conditions per place. [2024-06-20 15:22:58,761 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 93 changer transitions 0/264 dead transitions. [2024-06-20 15:22:58,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 264 transitions, 3845 flow [2024-06-20 15:22:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:22:58,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:22:58,762 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 3097 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:22:58,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 264 transitions, 3845 flow [2024-06-20 15:22:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 264 transitions, 3679 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:59,062 INFO L231 Difference]: Finished difference. Result has 206 places, 247 transitions, 3221 flow [2024-06-20 15:22:59,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3221, PETRI_PLACES=206, PETRI_TRANSITIONS=247} [2024-06-20 15:22:59,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 15:22:59,063 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 247 transitions, 3221 flow [2024-06-20 15:22:59,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:59,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:59,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:59,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:22:59,063 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:59,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1905625128, now seen corresponding path program 5 times [2024-06-20 15:22:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:59,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659483407] [2024-06-20 15:22:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:59,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:59,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659483407] [2024-06-20 15:22:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659483407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:59,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:22:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897423641] [2024-06-20 15:22:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:22:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:22:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:22:59,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:59,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 3221 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:59,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:59,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:59,729 INFO L124 PetriNetUnfolderBase]: 1962/3355 cut-off events. [2024-06-20 15:22:59,729 INFO L125 PetriNetUnfolderBase]: For 152428/152428 co-relation queries the response was YES. [2024-06-20 15:22:59,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20290 conditions, 3355 events. 1962/3355 cut-off events. For 152428/152428 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20519 event pairs, 493 based on Foata normal form. 3/3352 useless extension candidates. Maximal degree in co-relation 20191. Up to 2821 conditions per place. [2024-06-20 15:22:59,760 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 98 changer transitions 0/262 dead transitions. [2024-06-20 15:22:59,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3873 flow [2024-06-20 15:22:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:22:59,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:22:59,761 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 3221 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:22:59,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3873 flow [2024-06-20 15:23:00,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 262 transitions, 3624 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:00,069 INFO L231 Difference]: Finished difference. Result has 208 places, 247 transitions, 3181 flow [2024-06-20 15:23:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=208, PETRI_TRANSITIONS=247} [2024-06-20 15:23:00,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-20 15:23:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 247 transitions, 3181 flow [2024-06-20 15:23:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:00,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:00,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:23:00,070 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:00,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -410012270, now seen corresponding path program 1 times [2024-06-20 15:23:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000749429] [2024-06-20 15:23:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:00,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000749429] [2024-06-20 15:23:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000749429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:00,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:00,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242171529] [2024-06-20 15:23:00,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:00,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:00,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 247 transitions, 3181 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:00,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:00,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:00,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:00,583 INFO L124 PetriNetUnfolderBase]: 1999/3418 cut-off events. [2024-06-20 15:23:00,583 INFO L125 PetriNetUnfolderBase]: For 161196/161196 co-relation queries the response was YES. [2024-06-20 15:23:00,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20884 conditions, 3418 events. 1999/3418 cut-off events. For 161196/161196 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20884 event pairs, 503 based on Foata normal form. 1/3408 useless extension candidates. Maximal degree in co-relation 20785. Up to 2861 conditions per place. [2024-06-20 15:23:00,613 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 107 changer transitions 0/279 dead transitions. [2024-06-20 15:23:00,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 279 transitions, 4164 flow [2024-06-20 15:23:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:23:00,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-20 15:23:00,614 INFO L175 Difference]: Start difference. First operand has 208 places, 247 transitions, 3181 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:23:00,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 279 transitions, 4164 flow [2024-06-20 15:23:00,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 3934 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:00,994 INFO L231 Difference]: Finished difference. Result has 208 places, 258 transitions, 3340 flow [2024-06-20 15:23:00,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3340, PETRI_PLACES=208, PETRI_TRANSITIONS=258} [2024-06-20 15:23:00,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-20 15:23:00,995 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 258 transitions, 3340 flow [2024-06-20 15:23:00,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:00,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:00,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:00,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:23:00,996 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:00,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2075013290, now seen corresponding path program 2 times [2024-06-20 15:23:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:00,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129715090] [2024-06-20 15:23:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:01,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:01,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129715090] [2024-06-20 15:23:01,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129715090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:01,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:01,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946405434] [2024-06-20 15:23:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:01,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:01,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:01,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:01,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:01,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 258 transitions, 3340 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:01,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:01,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:01,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:01,548 INFO L124 PetriNetUnfolderBase]: 2004/3427 cut-off events. [2024-06-20 15:23:01,549 INFO L125 PetriNetUnfolderBase]: For 166494/166494 co-relation queries the response was YES. [2024-06-20 15:23:01,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 3427 events. 2004/3427 cut-off events. For 166494/166494 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20987 event pairs, 503 based on Foata normal form. 1/3417 useless extension candidates. Maximal degree in co-relation 20965. Up to 2865 conditions per place. [2024-06-20 15:23:01,579 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 109 changer transitions 0/282 dead transitions. [2024-06-20 15:23:01,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 282 transitions, 4095 flow [2024-06-20 15:23:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:23:01,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:23:01,581 INFO L175 Difference]: Start difference. First operand has 208 places, 258 transitions, 3340 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:23:01,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 282 transitions, 4095 flow [2024-06-20 15:23:01,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3938 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 15:23:01,957 INFO L231 Difference]: Finished difference. Result has 213 places, 261 transitions, 3450 flow [2024-06-20 15:23:01,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3450, PETRI_PLACES=213, PETRI_TRANSITIONS=261} [2024-06-20 15:23:01,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 15:23:01,958 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 261 transitions, 3450 flow [2024-06-20 15:23:01,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:01,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:23:01,959 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:01,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1888056718, now seen corresponding path program 3 times [2024-06-20 15:23:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12207459] [2024-06-20 15:23:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12207459] [2024-06-20 15:23:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12207459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:02,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043056358] [2024-06-20 15:23:02,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:02,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:02,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:02,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:02,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 261 transitions, 3450 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:02,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:02,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:02,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:02,660 INFO L124 PetriNetUnfolderBase]: 2001/3427 cut-off events. [2024-06-20 15:23:02,660 INFO L125 PetriNetUnfolderBase]: For 170064/170064 co-relation queries the response was YES. [2024-06-20 15:23:02,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21110 conditions, 3427 events. 2001/3427 cut-off events. For 170064/170064 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21038 event pairs, 475 based on Foata normal form. 1/3424 useless extension candidates. Maximal degree in co-relation 21009. Up to 3057 conditions per place. [2024-06-20 15:23:02,690 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 39 changer transitions 0/279 dead transitions. [2024-06-20 15:23:02,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 4049 flow [2024-06-20 15:23:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:23:02,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:23:02,691 INFO L175 Difference]: Start difference. First operand has 213 places, 261 transitions, 3450 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:23:02,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 4049 flow [2024-06-20 15:23:03,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 3805 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:03,101 INFO L231 Difference]: Finished difference. Result has 215 places, 261 transitions, 3296 flow [2024-06-20 15:23:03,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=215, PETRI_TRANSITIONS=261} [2024-06-20 15:23:03,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 15:23:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 261 transitions, 3296 flow [2024-06-20 15:23:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:03,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:03,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:03,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:23:03,102 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:03,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1049553066, now seen corresponding path program 4 times [2024-06-20 15:23:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:03,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011588703] [2024-06-20 15:23:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011588703] [2024-06-20 15:23:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011588703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:03,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:03,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875571657] [2024-06-20 15:23:03,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:03,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:03,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 261 transitions, 3296 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:03,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:03,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:03,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:03,663 INFO L124 PetriNetUnfolderBase]: 2006/3420 cut-off events. [2024-06-20 15:23:03,663 INFO L125 PetriNetUnfolderBase]: For 175620/175620 co-relation queries the response was YES. [2024-06-20 15:23:03,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20966 conditions, 3420 events. 2006/3420 cut-off events. For 175620/175620 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20920 event pairs, 522 based on Foata normal form. 1/3413 useless extension candidates. Maximal degree in co-relation 20864. Up to 2867 conditions per place. [2024-06-20 15:23:03,695 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 100 changer transitions 0/282 dead transitions. [2024-06-20 15:23:03,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 282 transitions, 4044 flow [2024-06-20 15:23:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:23:03,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:23:03,697 INFO L175 Difference]: Start difference. First operand has 215 places, 261 transitions, 3296 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:23:03,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 282 transitions, 4044 flow [2024-06-20 15:23:04,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 282 transitions, 3966 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:04,038 INFO L231 Difference]: Finished difference. Result has 216 places, 264 transitions, 3466 flow [2024-06-20 15:23:04,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3466, PETRI_PLACES=216, PETRI_TRANSITIONS=264} [2024-06-20 15:23:04,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 15:23:04,039 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 264 transitions, 3466 flow [2024-06-20 15:23:04,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:04,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:04,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:23:04,040 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:04,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1407797414, now seen corresponding path program 5 times [2024-06-20 15:23:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:04,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258085813] [2024-06-20 15:23:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:04,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:04,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258085813] [2024-06-20 15:23:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258085813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:04,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:04,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936887621] [2024-06-20 15:23:04,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:04,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:04,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 264 transitions, 3466 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:04,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:04,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:04,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:04,622 INFO L124 PetriNetUnfolderBase]: 2011/3443 cut-off events. [2024-06-20 15:23:04,622 INFO L125 PetriNetUnfolderBase]: For 182939/182945 co-relation queries the response was YES. [2024-06-20 15:23:04,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21376 conditions, 3443 events. 2011/3443 cut-off events. For 182939/182945 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21167 event pairs, 513 based on Foata normal form. 5/3441 useless extension candidates. Maximal degree in co-relation 21273. Up to 2871 conditions per place. [2024-06-20 15:23:04,654 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 99 changer transitions 0/285 dead transitions. [2024-06-20 15:23:04,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 285 transitions, 4344 flow [2024-06-20 15:23:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:23:04,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:23:04,656 INFO L175 Difference]: Start difference. First operand has 216 places, 264 transitions, 3466 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:23:04,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 285 transitions, 4344 flow [2024-06-20 15:23:04,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 4204 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:04,969 INFO L231 Difference]: Finished difference. Result has 218 places, 267 transitions, 3574 flow [2024-06-20 15:23:04,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3574, PETRI_PLACES=218, PETRI_TRANSITIONS=267} [2024-06-20 15:23:04,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 15:23:04,970 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 267 transitions, 3574 flow [2024-06-20 15:23:04,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:04,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:04,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:04,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:23:04,970 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:04,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1427107602, now seen corresponding path program 6 times [2024-06-20 15:23:04,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274160068] [2024-06-20 15:23:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:05,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274160068] [2024-06-20 15:23:05,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274160068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:05,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:05,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286397719] [2024-06-20 15:23:05,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:05,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:05,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 267 transitions, 3574 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:05,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:05,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:05,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:05,574 INFO L124 PetriNetUnfolderBase]: 2003/3431 cut-off events. [2024-06-20 15:23:05,574 INFO L125 PetriNetUnfolderBase]: For 187651/187657 co-relation queries the response was YES. [2024-06-20 15:23:05,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21311 conditions, 3431 events. 2003/3431 cut-off events. For 187651/187657 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21116 event pairs, 513 based on Foata normal form. 6/3430 useless extension candidates. Maximal degree in co-relation 21206. Up to 2863 conditions per place. [2024-06-20 15:23:05,607 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 182 selfloop transitions, 91 changer transitions 0/281 dead transitions. [2024-06-20 15:23:05,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 281 transitions, 4274 flow [2024-06-20 15:23:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:23:05,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:23:05,608 INFO L175 Difference]: Start difference. First operand has 218 places, 267 transitions, 3574 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:23:05,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 281 transitions, 4274 flow [2024-06-20 15:23:06,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 281 transitions, 4071 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:23:06,114 INFO L231 Difference]: Finished difference. Result has 221 places, 267 transitions, 3561 flow [2024-06-20 15:23:06,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3561, PETRI_PLACES=221, PETRI_TRANSITIONS=267} [2024-06-20 15:23:06,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-20 15:23:06,115 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 267 transitions, 3561 flow [2024-06-20 15:23:06,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:06,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:06,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:06,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:23:06,116 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:06,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 495281992, now seen corresponding path program 7 times [2024-06-20 15:23:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358914073] [2024-06-20 15:23:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:06,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:06,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358914073] [2024-06-20 15:23:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358914073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:06,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038659817] [2024-06-20 15:23:06,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:06,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:06,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:06,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 267 transitions, 3561 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:06,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:06,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:06,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:06,711 INFO L124 PetriNetUnfolderBase]: 1997/3415 cut-off events. [2024-06-20 15:23:06,711 INFO L125 PetriNetUnfolderBase]: For 188977/188977 co-relation queries the response was YES. [2024-06-20 15:23:06,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21209 conditions, 3415 events. 1997/3415 cut-off events. For 188977/188977 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20992 event pairs, 513 based on Foata normal form. 2/3409 useless extension candidates. Maximal degree in co-relation 21103. Up to 2858 conditions per place. [2024-06-20 15:23:06,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 102 changer transitions 0/285 dead transitions. [2024-06-20 15:23:06,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 4401 flow [2024-06-20 15:23:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:23:06,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-20 15:23:06,743 INFO L175 Difference]: Start difference. First operand has 221 places, 267 transitions, 3561 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:23:06,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 4401 flow [2024-06-20 15:23:07,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 285 transitions, 4209 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:07,149 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 3580 flow [2024-06-20 15:23:07,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3580, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-20 15:23:07,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 15:23:07,150 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 3580 flow [2024-06-20 15:23:07,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:07,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:07,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:23:07,151 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:07,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash -665501196, now seen corresponding path program 8 times [2024-06-20 15:23:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:07,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263067653] [2024-06-20 15:23:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:07,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:07,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:07,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263067653] [2024-06-20 15:23:07,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263067653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:07,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:07,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:07,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970812034] [2024-06-20 15:23:07,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:07,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:07,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:07,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:07,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 3580 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:07,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:07,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:07,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:07,698 INFO L124 PetriNetUnfolderBase]: 1989/3403 cut-off events. [2024-06-20 15:23:07,698 INFO L125 PetriNetUnfolderBase]: For 190387/190387 co-relation queries the response was YES. [2024-06-20 15:23:07,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21143 conditions, 3403 events. 1989/3403 cut-off events. For 190387/190387 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20918 event pairs, 513 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 21036. Up to 2850 conditions per place. [2024-06-20 15:23:07,729 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 98 changer transitions 0/282 dead transitions. [2024-06-20 15:23:07,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 282 transitions, 4288 flow [2024-06-20 15:23:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:23:07,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:23:07,730 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 3580 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:23:07,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 282 transitions, 4288 flow [2024-06-20 15:23:08,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 282 transitions, 3976 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:08,215 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 3473 flow [2024-06-20 15:23:08,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3473, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-20 15:23:08,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-20 15:23:08,216 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 3473 flow [2024-06-20 15:23:08,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:08,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:08,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:23:08,217 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:08,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash 848056116, now seen corresponding path program 9 times [2024-06-20 15:23:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:08,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332596527] [2024-06-20 15:23:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332596527] [2024-06-20 15:23:08,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332596527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:08,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:08,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525941553] [2024-06-20 15:23:08,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:08,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:08,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 3473 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:08,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:08,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:08,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:08,774 INFO L124 PetriNetUnfolderBase]: 1983/3405 cut-off events. [2024-06-20 15:23:08,774 INFO L125 PetriNetUnfolderBase]: For 188910/188910 co-relation queries the response was YES. [2024-06-20 15:23:08,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20956 conditions, 3405 events. 1983/3405 cut-off events. For 188910/188910 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20948 event pairs, 475 based on Foata normal form. 2/3403 useless extension candidates. Maximal degree in co-relation 20849. Up to 2849 conditions per place. [2024-06-20 15:23:08,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 109 changer transitions 0/294 dead transitions. [2024-06-20 15:23:08,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 294 transitions, 4239 flow [2024-06-20 15:23:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:23:08,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:23:08,807 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 3473 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:23:08,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 294 transitions, 4239 flow [2024-06-20 15:23:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 294 transitions, 4031 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:09,359 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 3512 flow [2024-06-20 15:23:09,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-20 15:23:09,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 15:23:09,360 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 3512 flow [2024-06-20 15:23:09,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:09,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:09,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:23:09,360 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:09,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1172322470, now seen corresponding path program 10 times [2024-06-20 15:23:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070374158] [2024-06-20 15:23:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070374158] [2024-06-20 15:23:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070374158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142618599] [2024-06-20 15:23:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:09,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:09,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 3512 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:09,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:09,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:09,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:09,922 INFO L124 PetriNetUnfolderBase]: 1975/3385 cut-off events. [2024-06-20 15:23:09,922 INFO L125 PetriNetUnfolderBase]: For 190348/190348 co-relation queries the response was YES. [2024-06-20 15:23:09,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20869 conditions, 3385 events. 1975/3385 cut-off events. For 190348/190348 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20804 event pairs, 495 based on Foata normal form. 2/3381 useless extension candidates. Maximal degree in co-relation 20761. Up to 2841 conditions per place. [2024-06-20 15:23:09,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 95 changer transitions 0/286 dead transitions. [2024-06-20 15:23:09,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 4116 flow [2024-06-20 15:23:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:23:09,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-20 15:23:09,953 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 3512 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:23:09,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 4116 flow [2024-06-20 15:23:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 286 transitions, 3929 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:10,521 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 3528 flow [2024-06-20 15:23:10,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3528, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-20 15:23:10,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-20 15:23:10,522 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 3528 flow [2024-06-20 15:23:10,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:10,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:10,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:10,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:23:10,522 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:10,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1276399050, now seen corresponding path program 1 times [2024-06-20 15:23:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:10,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316747793] [2024-06-20 15:23:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:10,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:10,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316747793] [2024-06-20 15:23:10,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316747793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:10,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:10,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:10,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398093570] [2024-06-20 15:23:10,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:10,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:10,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:10,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:23:10,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 3528 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:10,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:10,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:23:10,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:11,050 INFO L124 PetriNetUnfolderBase]: 1908/3320 cut-off events. [2024-06-20 15:23:11,051 INFO L125 PetriNetUnfolderBase]: For 191107/191107 co-relation queries the response was YES. [2024-06-20 15:23:11,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20349 conditions, 3320 events. 1908/3320 cut-off events. For 191107/191107 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20705 event pairs, 347 based on Foata normal form. 7/3304 useless extension candidates. Maximal degree in co-relation 20243. Up to 2753 conditions per place. [2024-06-20 15:23:11,082 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 216 selfloop transitions, 30 changer transitions 1/290 dead transitions. [2024-06-20 15:23:11,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 290 transitions, 4102 flow [2024-06-20 15:23:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:23:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:23:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-20 15:23:11,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2024-06-20 15:23:11,083 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 3528 flow. Second operand 5 states and 138 transitions. [2024-06-20 15:23:11,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 290 transitions, 4102 flow [2024-06-20 15:23:11,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 290 transitions, 3750 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:23:11,608 INFO L231 Difference]: Finished difference. Result has 220 places, 268 transitions, 3259 flow [2024-06-20 15:23:11,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3259, PETRI_PLACES=220, PETRI_TRANSITIONS=268} [2024-06-20 15:23:11,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-20 15:23:11,608 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 268 transitions, 3259 flow [2024-06-20 15:23:11,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:11,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:11,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:23:11,609 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:11,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1291636170, now seen corresponding path program 2 times [2024-06-20 15:23:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367724495] [2024-06-20 15:23:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367724495] [2024-06-20 15:23:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367724495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:11,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:11,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:11,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635858378] [2024-06-20 15:23:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:11,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:11,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:11,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:23:11,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 268 transitions, 3259 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:11,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:23:11,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:12,121 INFO L124 PetriNetUnfolderBase]: 1910/3323 cut-off events. [2024-06-20 15:23:12,122 INFO L125 PetriNetUnfolderBase]: For 182233/182238 co-relation queries the response was YES. [2024-06-20 15:23:12,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19828 conditions, 3323 events. 1910/3323 cut-off events. For 182233/182238 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20872 event pairs, 337 based on Foata normal form. 13/3313 useless extension candidates. Maximal degree in co-relation 19722. Up to 2652 conditions per place. [2024-06-20 15:23:12,152 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 221 selfloop transitions, 25 changer transitions 0/289 dead transitions. [2024-06-20 15:23:12,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 3957 flow [2024-06-20 15:23:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:23:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:23:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 15:23:12,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-20 15:23:12,153 INFO L175 Difference]: Start difference. First operand has 220 places, 268 transitions, 3259 flow. Second operand 5 states and 132 transitions. [2024-06-20 15:23:12,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 3957 flow [2024-06-20 15:23:12,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 289 transitions, 3902 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:23:12,588 INFO L231 Difference]: Finished difference. Result has 222 places, 269 transitions, 3270 flow [2024-06-20 15:23:12,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3270, PETRI_PLACES=222, PETRI_TRANSITIONS=269} [2024-06-20 15:23:12,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-20 15:23:12,589 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 269 transitions, 3270 flow [2024-06-20 15:23:12,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:12,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:12,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:23:12,589 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:12,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash -741790972, now seen corresponding path program 1 times [2024-06-20 15:23:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:12,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671982596] [2024-06-20 15:23:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:12,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671982596] [2024-06-20 15:23:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671982596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242517473] [2024-06-20 15:23:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:12,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:12,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 269 transitions, 3270 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:12,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:12,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:12,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:13,156 INFO L124 PetriNetUnfolderBase]: 2013/3457 cut-off events. [2024-06-20 15:23:13,156 INFO L125 PetriNetUnfolderBase]: For 176983/176989 co-relation queries the response was YES. [2024-06-20 15:23:13,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3457 events. 2013/3457 cut-off events. For 176983/176989 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21363 event pairs, 453 based on Foata normal form. 6/3460 useless extension candidates. Maximal degree in co-relation 20517. Up to 3089 conditions per place. [2024-06-20 15:23:13,186 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 29 changer transitions 0/292 dead transitions. [2024-06-20 15:23:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 292 transitions, 4082 flow [2024-06-20 15:23:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:23:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:23:13,187 INFO L175 Difference]: Start difference. First operand has 222 places, 269 transitions, 3270 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:23:13,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 292 transitions, 4082 flow [2024-06-20 15:23:13,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 292 transitions, 4039 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:23:13,687 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 3366 flow [2024-06-20 15:23:13,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3366, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-20 15:23:13,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-20 15:23:13,688 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 3366 flow [2024-06-20 15:23:13,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:13,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:13,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:13,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:23:13,688 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:13,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash -182782248, now seen corresponding path program 2 times [2024-06-20 15:23:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:13,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040347072] [2024-06-20 15:23:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:13,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040347072] [2024-06-20 15:23:13,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040347072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:13,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:13,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608876745] [2024-06-20 15:23:13,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:13,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:13,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 3366 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:13,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:14,247 INFO L124 PetriNetUnfolderBase]: 2021/3474 cut-off events. [2024-06-20 15:23:14,247 INFO L125 PetriNetUnfolderBase]: For 182500/182506 co-relation queries the response was YES. [2024-06-20 15:23:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3474 events. 2021/3474 cut-off events. For 182500/182506 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21502 event pairs, 484 based on Foata normal form. 6/3477 useless extension candidates. Maximal degree in co-relation 20669. Up to 3134 conditions per place. [2024-06-20 15:23:14,279 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-20 15:23:14,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 289 transitions, 4002 flow [2024-06-20 15:23:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:23:14,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:23:14,280 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 3366 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:23:14,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 289 transitions, 4002 flow [2024-06-20 15:23:15,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 289 transitions, 3908 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 15:23:15,052 INFO L231 Difference]: Finished difference. Result has 230 places, 275 transitions, 3373 flow [2024-06-20 15:23:15,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3373, PETRI_PLACES=230, PETRI_TRANSITIONS=275} [2024-06-20 15:23:15,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 15:23:15,053 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 275 transitions, 3373 flow [2024-06-20 15:23:15,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:15,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:15,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:23:15,053 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:15,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash 486621522, now seen corresponding path program 3 times [2024-06-20 15:23:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:15,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742193958] [2024-06-20 15:23:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:15,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:15,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742193958] [2024-06-20 15:23:15,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742193958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:15,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:15,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642803004] [2024-06-20 15:23:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:15,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:15,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 275 transitions, 3373 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:15,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:15,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:15,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:15,627 INFO L124 PetriNetUnfolderBase]: 2029/3482 cut-off events. [2024-06-20 15:23:15,627 INFO L125 PetriNetUnfolderBase]: For 187293/187293 co-relation queries the response was YES. [2024-06-20 15:23:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20850 conditions, 3482 events. 2029/3482 cut-off events. For 187293/187293 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21460 event pairs, 484 based on Foata normal form. 2/3480 useless extension candidates. Maximal degree in co-relation 20740. Up to 3146 conditions per place. [2024-06-20 15:23:15,660 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-20 15:23:15,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 292 transitions, 4003 flow [2024-06-20 15:23:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:23:15,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-20 15:23:15,661 INFO L175 Difference]: Start difference. First operand has 230 places, 275 transitions, 3373 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:23:15,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 292 transitions, 4003 flow [2024-06-20 15:23:16,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 292 transitions, 3940 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:16,294 INFO L231 Difference]: Finished difference. Result has 233 places, 277 transitions, 3401 flow [2024-06-20 15:23:16,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3401, PETRI_PLACES=233, PETRI_TRANSITIONS=277} [2024-06-20 15:23:16,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-20 15:23:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 277 transitions, 3401 flow [2024-06-20 15:23:16,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:16,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:16,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:16,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:23:16,295 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:16,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -665306578, now seen corresponding path program 1 times [2024-06-20 15:23:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959858756] [2024-06-20 15:23:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959858756] [2024-06-20 15:23:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959858756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:16,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416797970] [2024-06-20 15:23:16,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:16,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:16,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:16,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:16,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 277 transitions, 3401 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:16,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:16,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:16,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:16,844 INFO L124 PetriNetUnfolderBase]: 2045/3490 cut-off events. [2024-06-20 15:23:16,845 INFO L125 PetriNetUnfolderBase]: For 198703/198703 co-relation queries the response was YES. [2024-06-20 15:23:16,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21126 conditions, 3490 events. 2045/3490 cut-off events. For 198703/198703 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21516 event pairs, 530 based on Foata normal form. 4/3486 useless extension candidates. Maximal degree in co-relation 21015. Up to 2935 conditions per place. [2024-06-20 15:23:16,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 102 changer transitions 0/295 dead transitions. [2024-06-20 15:23:16,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 295 transitions, 4071 flow [2024-06-20 15:23:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:23:16,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:23:16,877 INFO L175 Difference]: Start difference. First operand has 233 places, 277 transitions, 3401 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:23:16,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 295 transitions, 4071 flow [2024-06-20 15:23:17,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 295 transitions, 4000 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:17,424 INFO L231 Difference]: Finished difference. Result has 235 places, 280 transitions, 3606 flow [2024-06-20 15:23:17,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3606, PETRI_PLACES=235, PETRI_TRANSITIONS=280} [2024-06-20 15:23:17,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 15:23:17,424 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 280 transitions, 3606 flow [2024-06-20 15:23:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:17,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:17,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:17,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:23:17,425 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:17,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:17,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1524015788, now seen corresponding path program 4 times [2024-06-20 15:23:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:17,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699121053] [2024-06-20 15:23:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699121053] [2024-06-20 15:23:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699121053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:17,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:17,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:23:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335052929] [2024-06-20 15:23:17,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:23:17,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:23:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:23:17,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:17,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 280 transitions, 3606 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:17,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:17,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:17,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:17,988 INFO L124 PetriNetUnfolderBase]: 2040/3497 cut-off events. [2024-06-20 15:23:17,988 INFO L125 PetriNetUnfolderBase]: For 195684/195684 co-relation queries the response was YES. [2024-06-20 15:23:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21402 conditions, 3497 events. 2040/3497 cut-off events. For 195684/195684 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21521 event pairs, 446 based on Foata normal form. 2/3497 useless extension candidates. Maximal degree in co-relation 21290. Up to 3154 conditions per place. [2024-06-20 15:23:18,020 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 270 selfloop transitions, 22 changer transitions 0/300 dead transitions. [2024-06-20 15:23:18,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 300 transitions, 4240 flow [2024-06-20 15:23:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:23:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:23:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:23:18,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:23:18,021 INFO L175 Difference]: Start difference. First operand has 235 places, 280 transitions, 3606 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:23:18,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 300 transitions, 4240 flow [2024-06-20 15:23:18,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 300 transitions, 3974 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:18,508 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3392 flow [2024-06-20 15:23:18,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3392, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-20 15:23:18,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-20 15:23:18,511 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3392 flow [2024-06-20 15:23:18,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:18,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:18,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:23:18,511 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1055171084, now seen corresponding path program 2 times [2024-06-20 15:23:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711791318] [2024-06-20 15:23:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:18,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711791318] [2024-06-20 15:23:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711791318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:18,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:18,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403666528] [2024-06-20 15:23:18,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:18,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:18,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3392 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:18,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:18,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:18,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:19,191 INFO L124 PetriNetUnfolderBase]: 2084/3560 cut-off events. [2024-06-20 15:23:19,192 INFO L125 PetriNetUnfolderBase]: For 225442/225442 co-relation queries the response was YES. [2024-06-20 15:23:19,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21649 conditions, 3560 events. 2084/3560 cut-off events. For 225442/225442 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22038 event pairs, 504 based on Foata normal form. 12/3566 useless extension candidates. Maximal degree in co-relation 21536. Up to 2968 conditions per place. [2024-06-20 15:23:19,223 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 100 changer transitions 0/304 dead transitions. [2024-06-20 15:23:19,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 4116 flow [2024-06-20 15:23:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:23:19,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:23:19,224 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3392 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:23:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 4116 flow [2024-06-20 15:23:19,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 304 transitions, 4058 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:19,759 INFO L231 Difference]: Finished difference. Result has 238 places, 283 transitions, 3614 flow [2024-06-20 15:23:19,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=238, PETRI_TRANSITIONS=283} [2024-06-20 15:23:19,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-20 15:23:19,759 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 283 transitions, 3614 flow [2024-06-20 15:23:19,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:19,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:19,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:19,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:23:19,760 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:19,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1283072234, now seen corresponding path program 3 times [2024-06-20 15:23:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:19,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397209529] [2024-06-20 15:23:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397209529] [2024-06-20 15:23:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397209529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:19,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:19,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781748237] [2024-06-20 15:23:19,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:19,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:19,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:19,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:19,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 283 transitions, 3614 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:19,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:19,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:19,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:20,410 INFO L124 PetriNetUnfolderBase]: 2128/3618 cut-off events. [2024-06-20 15:23:20,411 INFO L125 PetriNetUnfolderBase]: For 236750/236750 co-relation queries the response was YES. [2024-06-20 15:23:20,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22728 conditions, 3618 events. 2128/3618 cut-off events. For 236750/236750 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22370 event pairs, 509 based on Foata normal form. 12/3624 useless extension candidates. Maximal degree in co-relation 22614. Up to 3036 conditions per place. [2024-06-20 15:23:20,446 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 103 changer transitions 0/305 dead transitions. [2024-06-20 15:23:20,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 305 transitions, 4340 flow [2024-06-20 15:23:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:23:20,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:23:20,447 INFO L175 Difference]: Start difference. First operand has 238 places, 283 transitions, 3614 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:23:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 305 transitions, 4340 flow [2024-06-20 15:23:21,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 305 transitions, 4092 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:21,030 INFO L231 Difference]: Finished difference. Result has 241 places, 286 transitions, 3658 flow [2024-06-20 15:23:21,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=241, PETRI_TRANSITIONS=286} [2024-06-20 15:23:21,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-20 15:23:21,031 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 286 transitions, 3658 flow [2024-06-20 15:23:21,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:21,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:21,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:21,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:23:21,031 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:21,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1291643114, now seen corresponding path program 4 times [2024-06-20 15:23:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220124862] [2024-06-20 15:23:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:21,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:21,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:21,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220124862] [2024-06-20 15:23:21,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220124862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:21,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:21,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198584428] [2024-06-20 15:23:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:21,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:21,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 286 transitions, 3658 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:21,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:21,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:21,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:22,004 INFO L124 PetriNetUnfolderBase]: 2398/4064 cut-off events. [2024-06-20 15:23:22,004 INFO L125 PetriNetUnfolderBase]: For 338825/338825 co-relation queries the response was YES. [2024-06-20 15:23:22,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27505 conditions, 4064 events. 2398/4064 cut-off events. For 338825/338825 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25597 event pairs, 613 based on Foata normal form. 12/4070 useless extension candidates. Maximal degree in co-relation 27390. Up to 2917 conditions per place. [2024-06-20 15:23:22,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 109 changer transitions 0/318 dead transitions. [2024-06-20 15:23:22,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4645 flow [2024-06-20 15:23:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:23:22,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:23:22,060 INFO L175 Difference]: Start difference. First operand has 241 places, 286 transitions, 3658 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:23:22,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4645 flow [2024-06-20 15:23:22,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 318 transitions, 4385 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:22,716 INFO L231 Difference]: Finished difference. Result has 244 places, 292 transitions, 3785 flow [2024-06-20 15:23:22,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=244, PETRI_TRANSITIONS=292} [2024-06-20 15:23:22,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-20 15:23:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 292 transitions, 3785 flow [2024-06-20 15:23:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:22,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:22,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:23:22,717 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:22,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash -990747232, now seen corresponding path program 1 times [2024-06-20 15:23:22,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:22,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017249318] [2024-06-20 15:23:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:22,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:22,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017249318] [2024-06-20 15:23:22,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017249318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:22,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:22,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849897298] [2024-06-20 15:23:22,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:22,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:22,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:22,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:22,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:22,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 292 transitions, 3785 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:22,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:22,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:22,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:23,396 INFO L124 PetriNetUnfolderBase]: 2411/4102 cut-off events. [2024-06-20 15:23:23,396 INFO L125 PetriNetUnfolderBase]: For 320588/320588 co-relation queries the response was YES. [2024-06-20 15:23:23,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27799 conditions, 4102 events. 2411/4102 cut-off events. For 320588/320588 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25907 event pairs, 628 based on Foata normal form. 1/4099 useless extension candidates. Maximal degree in co-relation 27682. Up to 3672 conditions per place. [2024-06-20 15:23:23,435 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 50 changer transitions 0/329 dead transitions. [2024-06-20 15:23:23,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 329 transitions, 4761 flow [2024-06-20 15:23:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:23:23,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:23:23,436 INFO L175 Difference]: Start difference. First operand has 244 places, 292 transitions, 3785 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:23:23,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 329 transitions, 4761 flow [2024-06-20 15:23:24,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 329 transitions, 4555 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:24,216 INFO L231 Difference]: Finished difference. Result has 249 places, 298 transitions, 3822 flow [2024-06-20 15:23:24,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3822, PETRI_PLACES=249, PETRI_TRANSITIONS=298} [2024-06-20 15:23:24,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 15:23:24,216 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 298 transitions, 3822 flow [2024-06-20 15:23:24,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:24,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:24,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:24,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:23:24,217 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:24,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash 393192562, now seen corresponding path program 2 times [2024-06-20 15:23:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:24,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422448829] [2024-06-20 15:23:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:24,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:24,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422448829] [2024-06-20 15:23:24,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422448829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:24,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:24,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969745694] [2024-06-20 15:23:24,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:24,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:24,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:24,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 298 transitions, 3822 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:24,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:24,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:24,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:25,015 INFO L124 PetriNetUnfolderBase]: 2448/4153 cut-off events. [2024-06-20 15:23:25,015 INFO L125 PetriNetUnfolderBase]: For 346537/346537 co-relation queries the response was YES. [2024-06-20 15:23:25,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28701 conditions, 4153 events. 2448/4153 cut-off events. For 346537/346537 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26223 event pairs, 660 based on Foata normal form. 1/4138 useless extension candidates. Maximal degree in co-relation 28581. Up to 3295 conditions per place. [2024-06-20 15:23:25,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 155 changer transitions 0/340 dead transitions. [2024-06-20 15:23:25,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 340 transitions, 5320 flow [2024-06-20 15:23:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 15:23:25,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-20 15:23:25,061 INFO L175 Difference]: Start difference. First operand has 249 places, 298 transitions, 3822 flow. Second operand 7 states and 185 transitions. [2024-06-20 15:23:25,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 340 transitions, 5320 flow [2024-06-20 15:23:25,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 340 transitions, 5192 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:25,835 INFO L231 Difference]: Finished difference. Result has 253 places, 312 transitions, 4291 flow [2024-06-20 15:23:25,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4291, PETRI_PLACES=253, PETRI_TRANSITIONS=312} [2024-06-20 15:23:25,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 15:23:25,836 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 312 transitions, 4291 flow [2024-06-20 15:23:25,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:25,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:25,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:25,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:23:25,836 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:25,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 403668082, now seen corresponding path program 3 times [2024-06-20 15:23:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:25,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392972504] [2024-06-20 15:23:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:25,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:25,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392972504] [2024-06-20 15:23:25,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392972504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:25,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:25,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:25,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48689940] [2024-06-20 15:23:25,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:25,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:25,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:25,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:25,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 312 transitions, 4291 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:25,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:25,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:25,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:26,619 INFO L124 PetriNetUnfolderBase]: 2453/4158 cut-off events. [2024-06-20 15:23:26,619 INFO L125 PetriNetUnfolderBase]: For 360761/360761 co-relation queries the response was YES. [2024-06-20 15:23:26,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29954 conditions, 4158 events. 2453/4158 cut-off events. For 360761/360761 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26259 event pairs, 658 based on Foata normal form. 1/4143 useless extension candidates. Maximal degree in co-relation 29831. Up to 3297 conditions per place. [2024-06-20 15:23:26,662 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 157 changer transitions 0/340 dead transitions. [2024-06-20 15:23:26,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 340 transitions, 5622 flow [2024-06-20 15:23:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:23:26,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:23:26,663 INFO L175 Difference]: Start difference. First operand has 253 places, 312 transitions, 4291 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:23:26,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 340 transitions, 5622 flow [2024-06-20 15:23:27,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 340 transitions, 5427 flow, removed 83 selfloop flow, removed 1 redundant places. [2024-06-20 15:23:27,496 INFO L231 Difference]: Finished difference. Result has 259 places, 315 transitions, 4501 flow [2024-06-20 15:23:27,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4501, PETRI_PLACES=259, PETRI_TRANSITIONS=315} [2024-06-20 15:23:27,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-20 15:23:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 315 transitions, 4501 flow [2024-06-20 15:23:27,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:27,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:27,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:27,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:23:27,497 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:27,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1314171190, now seen corresponding path program 4 times [2024-06-20 15:23:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:27,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522284765] [2024-06-20 15:23:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:27,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:27,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:27,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522284765] [2024-06-20 15:23:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522284765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:27,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:27,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:27,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956165632] [2024-06-20 15:23:27,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:27,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:27,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:27,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:27,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:27,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 315 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:27,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:27,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:27,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:28,253 INFO L124 PetriNetUnfolderBase]: 2466/4188 cut-off events. [2024-06-20 15:23:28,253 INFO L125 PetriNetUnfolderBase]: For 367048/367048 co-relation queries the response was YES. [2024-06-20 15:23:28,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 4188 events. 2466/4188 cut-off events. For 367048/367048 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26509 event pairs, 627 based on Foata normal form. 1/4185 useless extension candidates. Maximal degree in co-relation 29215. Up to 3772 conditions per place. [2024-06-20 15:23:28,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 44 changer transitions 0/341 dead transitions. [2024-06-20 15:23:28,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 5494 flow [2024-06-20 15:23:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:23:28,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 15:23:28,405 INFO L175 Difference]: Start difference. First operand has 259 places, 315 transitions, 4501 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:23:28,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 5494 flow [2024-06-20 15:23:29,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 341 transitions, 5162 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:29,346 INFO L231 Difference]: Finished difference. Result has 264 places, 321 transitions, 4407 flow [2024-06-20 15:23:29,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4407, PETRI_PLACES=264, PETRI_TRANSITIONS=321} [2024-06-20 15:23:29,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-20 15:23:29,346 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 321 transitions, 4407 flow [2024-06-20 15:23:29,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:29,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:29,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:23:29,347 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:29,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1305899258, now seen corresponding path program 5 times [2024-06-20 15:23:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:29,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432106186] [2024-06-20 15:23:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:29,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:29,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432106186] [2024-06-20 15:23:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432106186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:29,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:29,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:29,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367499539] [2024-06-20 15:23:29,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:29,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:29,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:29,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 321 transitions, 4407 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:29,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:30,043 INFO L124 PetriNetUnfolderBase]: 2471/4165 cut-off events. [2024-06-20 15:23:30,043 INFO L125 PetriNetUnfolderBase]: For 376363/376363 co-relation queries the response was YES. [2024-06-20 15:23:30,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29189 conditions, 4165 events. 2471/4165 cut-off events. For 376363/376363 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26372 event pairs, 714 based on Foata normal form. 1/4150 useless extension candidates. Maximal degree in co-relation 29061. Up to 3307 conditions per place. [2024-06-20 15:23:30,090 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 150 changer transitions 0/354 dead transitions. [2024-06-20 15:23:30,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 354 transitions, 5859 flow [2024-06-20 15:23:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:23:30,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:23:30,091 INFO L175 Difference]: Start difference. First operand has 264 places, 321 transitions, 4407 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:23:30,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 354 transitions, 5859 flow [2024-06-20 15:23:30,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 354 transitions, 5740 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:30,936 INFO L231 Difference]: Finished difference. Result has 267 places, 331 transitions, 4852 flow [2024-06-20 15:23:30,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4852, PETRI_PLACES=267, PETRI_TRANSITIONS=331} [2024-06-20 15:23:30,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-20 15:23:30,937 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 331 transitions, 4852 flow [2024-06-20 15:23:30,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:30,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:30,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:30,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:23:30,937 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:30,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1174078500, now seen corresponding path program 6 times [2024-06-20 15:23:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:30,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759558851] [2024-06-20 15:23:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:30,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:31,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759558851] [2024-06-20 15:23:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759558851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:31,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689539743] [2024-06-20 15:23:31,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:31,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:31,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:31,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 331 transitions, 4852 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:31,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:31,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:31,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:31,635 INFO L124 PetriNetUnfolderBase]: 2476/4174 cut-off events. [2024-06-20 15:23:31,636 INFO L125 PetriNetUnfolderBase]: For 389232/389232 co-relation queries the response was YES. [2024-06-20 15:23:31,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29784 conditions, 4174 events. 2476/4174 cut-off events. For 389232/389232 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26401 event pairs, 714 based on Foata normal form. 1/4159 useless extension candidates. Maximal degree in co-relation 29655. Up to 3309 conditions per place. [2024-06-20 15:23:31,681 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 151 changer transitions 0/354 dead transitions. [2024-06-20 15:23:31,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 354 transitions, 6140 flow [2024-06-20 15:23:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:23:31,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:23:31,682 INFO L175 Difference]: Start difference. First operand has 267 places, 331 transitions, 4852 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:23:31,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 354 transitions, 6140 flow [2024-06-20 15:23:32,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 354 transitions, 5949 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-20 15:23:32,859 INFO L231 Difference]: Finished difference. Result has 272 places, 334 transitions, 5061 flow [2024-06-20 15:23:32,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5061, PETRI_PLACES=272, PETRI_TRANSITIONS=334} [2024-06-20 15:23:32,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-20 15:23:32,860 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 334 transitions, 5061 flow [2024-06-20 15:23:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:32,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:23:32,860 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:32,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 836019214, now seen corresponding path program 7 times [2024-06-20 15:23:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536135955] [2024-06-20 15:23:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:32,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:32,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536135955] [2024-06-20 15:23:32,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536135955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:32,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:32,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91915783] [2024-06-20 15:23:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:32,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:32,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:32,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:32,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 334 transitions, 5061 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:32,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:32,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:32,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:33,567 INFO L124 PetriNetUnfolderBase]: 2494/4201 cut-off events. [2024-06-20 15:23:33,567 INFO L125 PetriNetUnfolderBase]: For 406207/406207 co-relation queries the response was YES. [2024-06-20 15:23:33,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30473 conditions, 4201 events. 2494/4201 cut-off events. For 406207/406207 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26549 event pairs, 713 based on Foata normal form. 2/4187 useless extension candidates. Maximal degree in co-relation 30342. Up to 3321 conditions per place. [2024-06-20 15:23:33,614 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 153 changer transitions 0/358 dead transitions. [2024-06-20 15:23:33,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 358 transitions, 6415 flow [2024-06-20 15:23:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:23:33,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:23:33,615 INFO L175 Difference]: Start difference. First operand has 272 places, 334 transitions, 5061 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:23:33,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 358 transitions, 6415 flow [2024-06-20 15:23:34,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 358 transitions, 6150 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 15:23:34,514 INFO L231 Difference]: Finished difference. Result has 276 places, 341 transitions, 5263 flow [2024-06-20 15:23:34,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5263, PETRI_PLACES=276, PETRI_TRANSITIONS=341} [2024-06-20 15:23:34,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 15:23:34,515 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 341 transitions, 5263 flow [2024-06-20 15:23:34,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:34,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:34,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:23:34,516 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:34,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1973978012, now seen corresponding path program 8 times [2024-06-20 15:23:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:34,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374142460] [2024-06-20 15:23:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374142460] [2024-06-20 15:23:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374142460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:34,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373652907] [2024-06-20 15:23:34,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:34,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:34,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:34,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:34,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 341 transitions, 5263 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:34,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:34,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:34,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:35,254 INFO L124 PetriNetUnfolderBase]: 2512/4256 cut-off events. [2024-06-20 15:23:35,254 INFO L125 PetriNetUnfolderBase]: For 418789/418789 co-relation queries the response was YES. [2024-06-20 15:23:35,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30942 conditions, 4256 events. 2512/4256 cut-off events. For 418789/418789 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27058 event pairs, 645 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 30810. Up to 3537 conditions per place. [2024-06-20 15:23:35,301 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 121 changer transitions 0/373 dead transitions. [2024-06-20 15:23:35,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 373 transitions, 6493 flow [2024-06-20 15:23:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:23:35,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-20 15:23:35,302 INFO L175 Difference]: Start difference. First operand has 276 places, 341 transitions, 5263 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:23:35,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 373 transitions, 6493 flow [2024-06-20 15:23:36,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 6170 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 15:23:36,237 INFO L231 Difference]: Finished difference. Result has 281 places, 347 transitions, 5376 flow [2024-06-20 15:23:36,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5376, PETRI_PLACES=281, PETRI_TRANSITIONS=347} [2024-06-20 15:23:36,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-20 15:23:36,238 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 347 transitions, 5376 flow [2024-06-20 15:23:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:36,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:36,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:36,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:23:36,238 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:36,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 515288210, now seen corresponding path program 9 times [2024-06-20 15:23:36,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:36,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201047593] [2024-06-20 15:23:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:36,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201047593] [2024-06-20 15:23:36,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201047593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:36,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:36,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117360491] [2024-06-20 15:23:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:36,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:36,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:36,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 347 transitions, 5376 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:36,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:36,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:36,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:37,115 INFO L124 PetriNetUnfolderBase]: 2506/4264 cut-off events. [2024-06-20 15:23:37,115 INFO L125 PetriNetUnfolderBase]: For 420866/420866 co-relation queries the response was YES. [2024-06-20 15:23:37,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30828 conditions, 4264 events. 2506/4264 cut-off events. For 420866/420866 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27175 event pairs, 629 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 30694. Up to 3534 conditions per place. [2024-06-20 15:23:37,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 135 changer transitions 0/380 dead transitions. [2024-06-20 15:23:37,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 380 transitions, 6540 flow [2024-06-20 15:23:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-20 15:23:37,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2024-06-20 15:23:37,164 INFO L175 Difference]: Start difference. First operand has 281 places, 347 transitions, 5376 flow. Second operand 8 states and 214 transitions. [2024-06-20 15:23:37,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 380 transitions, 6540 flow [2024-06-20 15:23:38,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 380 transitions, 6281 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:38,298 INFO L231 Difference]: Finished difference. Result has 284 places, 348 transitions, 5493 flow [2024-06-20 15:23:38,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=284, PETRI_TRANSITIONS=348} [2024-06-20 15:23:38,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 15:23:38,298 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 348 transitions, 5493 flow [2024-06-20 15:23:38,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:38,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:38,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:38,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:23:38,299 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:38,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1520682533, now seen corresponding path program 1 times [2024-06-20 15:23:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702372462] [2024-06-20 15:23:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702372462] [2024-06-20 15:23:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702372462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:38,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:38,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111170657] [2024-06-20 15:23:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:38,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:38,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 348 transitions, 5493 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:38,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:38,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:38,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:39,127 INFO L124 PetriNetUnfolderBase]: 2731/4650 cut-off events. [2024-06-20 15:23:39,127 INFO L125 PetriNetUnfolderBase]: For 571714/571720 co-relation queries the response was YES. [2024-06-20 15:23:39,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35788 conditions, 4650 events. 2731/4650 cut-off events. For 571714/571720 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30196 event pairs, 660 based on Foata normal form. 16/4659 useless extension candidates. Maximal degree in co-relation 35652. Up to 3426 conditions per place. [2024-06-20 15:23:39,180 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 279 selfloop transitions, 99 changer transitions 0/386 dead transitions. [2024-06-20 15:23:39,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 386 transitions, 6851 flow [2024-06-20 15:23:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:23:39,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:23:39,181 INFO L175 Difference]: Start difference. First operand has 284 places, 348 transitions, 5493 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:23:39,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 386 transitions, 6851 flow [2024-06-20 15:23:40,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 386 transitions, 6644 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:40,521 INFO L231 Difference]: Finished difference. Result has 287 places, 354 transitions, 5667 flow [2024-06-20 15:23:40,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5667, PETRI_PLACES=287, PETRI_TRANSITIONS=354} [2024-06-20 15:23:40,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-20 15:23:40,521 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 354 transitions, 5667 flow [2024-06-20 15:23:40,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:40,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:40,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:40,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:23:40,522 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:40,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1291119211, now seen corresponding path program 2 times [2024-06-20 15:23:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:40,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338173236] [2024-06-20 15:23:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:40,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:40,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:40,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338173236] [2024-06-20 15:23:40,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338173236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:40,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:40,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:40,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764990159] [2024-06-20 15:23:40,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:40,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:40,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:40,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:40,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 354 transitions, 5667 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:40,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:40,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:40,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:41,365 INFO L124 PetriNetUnfolderBase]: 2787/4731 cut-off events. [2024-06-20 15:23:41,365 INFO L125 PetriNetUnfolderBase]: For 588346/588352 co-relation queries the response was YES. [2024-06-20 15:23:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 4731 events. 2787/4731 cut-off events. For 588346/588352 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30756 event pairs, 760 based on Foata normal form. 20/4744 useless extension candidates. Maximal degree in co-relation 36620. Up to 4027 conditions per place. [2024-06-20 15:23:41,422 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 95 changer transitions 0/374 dead transitions. [2024-06-20 15:23:41,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 374 transitions, 6504 flow [2024-06-20 15:23:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:23:41,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:23:41,425 INFO L175 Difference]: Start difference. First operand has 287 places, 354 transitions, 5667 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:23:41,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 374 transitions, 6504 flow [2024-06-20 15:23:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 374 transitions, 6363 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-20 15:23:42,631 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 5775 flow [2024-06-20 15:23:42,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5775, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-20 15:23:42,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-20 15:23:42,632 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 5775 flow [2024-06-20 15:23:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:42,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:42,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:42,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:23:42,632 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:42,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1290971341, now seen corresponding path program 3 times [2024-06-20 15:23:42,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:42,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249195865] [2024-06-20 15:23:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:42,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:42,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249195865] [2024-06-20 15:23:42,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249195865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:42,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:42,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:42,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038823970] [2024-06-20 15:23:42,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:42,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:42,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:42,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 5775 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:42,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:42,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:42,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:43,530 INFO L124 PetriNetUnfolderBase]: 2893/4903 cut-off events. [2024-06-20 15:23:43,531 INFO L125 PetriNetUnfolderBase]: For 626159/626165 co-relation queries the response was YES. [2024-06-20 15:23:43,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 4903 events. 2893/4903 cut-off events. For 626159/626165 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32089 event pairs, 769 based on Foata normal form. 16/4912 useless extension candidates. Maximal degree in co-relation 38847. Up to 4035 conditions per place. [2024-06-20 15:23:43,592 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 94 changer transitions 0/382 dead transitions. [2024-06-20 15:23:43,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 382 transitions, 6855 flow [2024-06-20 15:23:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:23:43,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:23:43,593 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 5775 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:23:43,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 382 transitions, 6855 flow [2024-06-20 15:23:45,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 382 transitions, 6631 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:45,299 INFO L231 Difference]: Finished difference. Result has 295 places, 360 transitions, 5859 flow [2024-06-20 15:23:45,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5859, PETRI_PLACES=295, PETRI_TRANSITIONS=360} [2024-06-20 15:23:45,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-20 15:23:45,300 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 360 transitions, 5859 flow [2024-06-20 15:23:45,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:45,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:45,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:23:45,300 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2089090633, now seen corresponding path program 4 times [2024-06-20 15:23:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042030100] [2024-06-20 15:23:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:45,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:45,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042030100] [2024-06-20 15:23:45,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042030100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:45,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:45,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:45,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108767607] [2024-06-20 15:23:45,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:45,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:45,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:45,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:45,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:45,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 360 transitions, 5859 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:45,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:45,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:45,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:46,381 INFO L124 PetriNetUnfolderBase]: 2949/4983 cut-off events. [2024-06-20 15:23:46,382 INFO L125 PetriNetUnfolderBase]: For 657021/657021 co-relation queries the response was YES. [2024-06-20 15:23:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39752 conditions, 4983 events. 2949/4983 cut-off events. For 657021/657021 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32707 event pairs, 792 based on Foata normal form. 16/4991 useless extension candidates. Maximal degree in co-relation 39609. Up to 4281 conditions per place. [2024-06-20 15:23:46,444 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 267 selfloop transitions, 108 changer transitions 0/383 dead transitions. [2024-06-20 15:23:46,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 383 transitions, 6728 flow [2024-06-20 15:23:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:23:46,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:23:46,445 INFO L175 Difference]: Start difference. First operand has 295 places, 360 transitions, 5859 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:23:46,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 383 transitions, 6728 flow [2024-06-20 15:23:48,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 383 transitions, 6573 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 15:23:48,216 INFO L231 Difference]: Finished difference. Result has 302 places, 362 transitions, 5987 flow [2024-06-20 15:23:48,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5987, PETRI_PLACES=302, PETRI_TRANSITIONS=362} [2024-06-20 15:23:48,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 15:23:48,217 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 362 transitions, 5987 flow [2024-06-20 15:23:48,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:48,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:48,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:48,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:23:48,218 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:48,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash 844755913, now seen corresponding path program 5 times [2024-06-20 15:23:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:48,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360796664] [2024-06-20 15:23:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:48,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:48,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360796664] [2024-06-20 15:23:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360796664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:48,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:48,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139274016] [2024-06-20 15:23:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:48,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:48,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:48,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 362 transitions, 5987 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:48,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:48,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:48,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:49,298 INFO L124 PetriNetUnfolderBase]: 2992/5068 cut-off events. [2024-06-20 15:23:49,298 INFO L125 PetriNetUnfolderBase]: For 664710/664710 co-relation queries the response was YES. [2024-06-20 15:23:49,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40377 conditions, 5068 events. 2992/5068 cut-off events. For 664710/664710 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33442 event pairs, 813 based on Foata normal form. 16/5076 useless extension candidates. Maximal degree in co-relation 40232. Up to 4350 conditions per place. [2024-06-20 15:23:49,361 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 102 changer transitions 0/383 dead transitions. [2024-06-20 15:23:49,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 383 transitions, 6856 flow [2024-06-20 15:23:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:23:49,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:23:49,362 INFO L175 Difference]: Start difference. First operand has 302 places, 362 transitions, 5987 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:23:49,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 383 transitions, 6856 flow [2024-06-20 15:23:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 383 transitions, 6598 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:51,151 INFO L231 Difference]: Finished difference. Result has 302 places, 364 transitions, 6004 flow [2024-06-20 15:23:51,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6004, PETRI_PLACES=302, PETRI_TRANSITIONS=364} [2024-06-20 15:23:51,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 15:23:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 364 transitions, 6004 flow [2024-06-20 15:23:51,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:51,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:51,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:23:51,152 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:51,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash 844608043, now seen corresponding path program 6 times [2024-06-20 15:23:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:51,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788470106] [2024-06-20 15:23:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:51,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788470106] [2024-06-20 15:23:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788470106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399255468] [2024-06-20 15:23:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:51,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:51,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 364 transitions, 6004 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:51,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:51,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:51,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:52,146 INFO L124 PetriNetUnfolderBase]: 3098/5236 cut-off events. [2024-06-20 15:23:52,146 INFO L125 PetriNetUnfolderBase]: For 704314/704314 co-relation queries the response was YES. [2024-06-20 15:23:52,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42468 conditions, 5236 events. 3098/5236 cut-off events. For 704314/704314 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34778 event pairs, 818 based on Foata normal form. 12/5240 useless extension candidates. Maximal degree in co-relation 42322. Up to 4272 conditions per place. [2024-06-20 15:23:52,212 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 101 changer transitions 0/391 dead transitions. [2024-06-20 15:23:52,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 391 transitions, 7130 flow [2024-06-20 15:23:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:23:52,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:23:52,213 INFO L175 Difference]: Start difference. First operand has 302 places, 364 transitions, 6004 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:23:52,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 391 transitions, 7130 flow [2024-06-20 15:23:53,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 391 transitions, 6909 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:53,973 INFO L231 Difference]: Finished difference. Result has 306 places, 368 transitions, 6130 flow [2024-06-20 15:23:53,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6130, PETRI_PLACES=306, PETRI_TRANSITIONS=368} [2024-06-20 15:23:53,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 15:23:53,973 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 368 transitions, 6130 flow [2024-06-20 15:23:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:53,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:53,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:53,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:23:53,974 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:53,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 850333495, now seen corresponding path program 1 times [2024-06-20 15:23:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312509394] [2024-06-20 15:23:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312509394] [2024-06-20 15:23:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312509394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:54,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:54,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:54,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063626114] [2024-06-20 15:23:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:54,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:54,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:54,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:54,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 368 transitions, 6130 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:54,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:54,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:54,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:55,023 INFO L124 PetriNetUnfolderBase]: 3105/5253 cut-off events. [2024-06-20 15:23:55,023 INFO L125 PetriNetUnfolderBase]: For 695344/695344 co-relation queries the response was YES. [2024-06-20 15:23:55,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42058 conditions, 5253 events. 3105/5253 cut-off events. For 695344/695344 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34963 event pairs, 822 based on Foata normal form. 12/5257 useless extension candidates. Maximal degree in co-relation 41910. Up to 4405 conditions per place. [2024-06-20 15:23:55,088 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 115 changer transitions 0/394 dead transitions. [2024-06-20 15:23:55,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 394 transitions, 7032 flow [2024-06-20 15:23:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-20 15:23:55,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-20 15:23:55,089 INFO L175 Difference]: Start difference. First operand has 306 places, 368 transitions, 6130 flow. Second operand 10 states and 233 transitions. [2024-06-20 15:23:55,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 394 transitions, 7032 flow [2024-06-20 15:23:56,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 394 transitions, 6901 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 15:23:56,896 INFO L231 Difference]: Finished difference. Result has 313 places, 370 transitions, 6296 flow [2024-06-20 15:23:56,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6296, PETRI_PLACES=313, PETRI_TRANSITIONS=370} [2024-06-20 15:23:56,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 15:23:56,897 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 370 transitions, 6296 flow [2024-06-20 15:23:56,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:56,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:56,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:23:56,898 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:56,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1982714711, now seen corresponding path program 7 times [2024-06-20 15:23:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725825047] [2024-06-20 15:23:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:56,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725825047] [2024-06-20 15:23:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725825047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:57,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:23:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689357768] [2024-06-20 15:23:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:57,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:23:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:23:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:23:57,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:57,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 370 transitions, 6296 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:57,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:57,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:57,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:57,915 INFO L124 PetriNetUnfolderBase]: 3237/5483 cut-off events. [2024-06-20 15:23:57,915 INFO L125 PetriNetUnfolderBase]: For 820619/820619 co-relation queries the response was YES. [2024-06-20 15:23:57,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43245 conditions, 5483 events. 3237/5483 cut-off events. For 820619/820619 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36862 event pairs, 870 based on Foata normal form. 42/5519 useless extension candidates. Maximal degree in co-relation 43094. Up to 4615 conditions per place. [2024-06-20 15:23:57,984 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 94 changer transitions 7/395 dead transitions. [2024-06-20 15:23:57,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 395 transitions, 7191 flow [2024-06-20 15:23:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:23:57,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:23:57,985 INFO L175 Difference]: Start difference. First operand has 313 places, 370 transitions, 6296 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:23:57,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 395 transitions, 7191 flow [2024-06-20 15:23:59,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 395 transitions, 6910 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:59,955 INFO L231 Difference]: Finished difference. Result has 312 places, 367 transitions, 6161 flow [2024-06-20 15:23:59,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6161, PETRI_PLACES=312, PETRI_TRANSITIONS=367} [2024-06-20 15:23:59,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-20 15:23:59,955 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 367 transitions, 6161 flow [2024-06-20 15:23:59,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:59,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:59,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:59,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:23:59,956 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:59,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1988077091, now seen corresponding path program 8 times [2024-06-20 15:23:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:59,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229542177] [2024-06-20 15:23:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:59,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:00,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229542177] [2024-06-20 15:24:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229542177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:00,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:00,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:00,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873983120] [2024-06-20 15:24:00,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:00,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:00,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:00,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 367 transitions, 6161 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:00,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:00,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:00,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:01,013 INFO L124 PetriNetUnfolderBase]: 3179/5387 cut-off events. [2024-06-20 15:24:01,013 INFO L125 PetriNetUnfolderBase]: For 767700/767700 co-relation queries the response was YES. [2024-06-20 15:24:01,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 5387 events. 3179/5387 cut-off events. For 767700/767700 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36022 event pairs, 840 based on Foata normal form. 42/5423 useless extension candidates. Maximal degree in co-relation 40821. Up to 4538 conditions per place. [2024-06-20 15:24:01,082 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 94 changer transitions 7/389 dead transitions. [2024-06-20 15:24:01,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 389 transitions, 7018 flow [2024-06-20 15:24:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:24:01,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:24:01,083 INFO L175 Difference]: Start difference. First operand has 312 places, 367 transitions, 6161 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:24:01,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 389 transitions, 7018 flow [2024-06-20 15:24:03,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 6808 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:03,114 INFO L231 Difference]: Finished difference. Result has 315 places, 363 transitions, 6092 flow [2024-06-20 15:24:03,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5951, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6092, PETRI_PLACES=315, PETRI_TRANSITIONS=363} [2024-06-20 15:24:03,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-20 15:24:03,114 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 363 transitions, 6092 flow [2024-06-20 15:24:03,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:03,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:03,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:24:03,115 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:03,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1982566841, now seen corresponding path program 9 times [2024-06-20 15:24:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:03,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152927094] [2024-06-20 15:24:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:03,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:03,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152927094] [2024-06-20 15:24:03,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152927094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:03,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:03,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541691788] [2024-06-20 15:24:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:03,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:03,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:03,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 363 transitions, 6092 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:03,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:04,133 INFO L124 PetriNetUnfolderBase]: 3176/5421 cut-off events. [2024-06-20 15:24:04,133 INFO L125 PetriNetUnfolderBase]: For 739126/739126 co-relation queries the response was YES. [2024-06-20 15:24:04,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40545 conditions, 5421 events. 3176/5421 cut-off events. For 739126/739126 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36594 event pairs, 704 based on Foata normal form. 36/5451 useless extension candidates. Maximal degree in co-relation 40392. Up to 3981 conditions per place. [2024-06-20 15:24:04,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 91 changer transitions 10/398 dead transitions. [2024-06-20 15:24:04,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 398 transitions, 7227 flow [2024-06-20 15:24:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 15:24:04,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-20 15:24:04,202 INFO L175 Difference]: Start difference. First operand has 315 places, 363 transitions, 6092 flow. Second operand 7 states and 188 transitions. [2024-06-20 15:24:04,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 398 transitions, 7227 flow [2024-06-20 15:24:06,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 398 transitions, 6897 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:06,498 INFO L231 Difference]: Finished difference. Result has 315 places, 358 transitions, 5855 flow [2024-06-20 15:24:06,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5855, PETRI_PLACES=315, PETRI_TRANSITIONS=358} [2024-06-20 15:24:06,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-20 15:24:06,499 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 358 transitions, 5855 flow [2024-06-20 15:24:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:06,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:06,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:06,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:24:06,499 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:06,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1377035033, now seen corresponding path program 2 times [2024-06-20 15:24:06,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:06,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84818374] [2024-06-20 15:24:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:06,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84818374] [2024-06-20 15:24:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84818374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300133161] [2024-06-20 15:24:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:06,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:06,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 358 transitions, 5855 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:06,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:06,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:06,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:07,484 INFO L124 PetriNetUnfolderBase]: 2925/4987 cut-off events. [2024-06-20 15:24:07,485 INFO L125 PetriNetUnfolderBase]: For 607598/607598 co-relation queries the response was YES. [2024-06-20 15:24:07,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 4987 events. 2925/4987 cut-off events. For 607598/607598 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33179 event pairs, 635 based on Foata normal form. 36/5017 useless extension candidates. Maximal degree in co-relation 35551. Up to 3800 conditions per place. [2024-06-20 15:24:07,545 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 92 changer transitions 17/386 dead transitions. [2024-06-20 15:24:07,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 386 transitions, 6740 flow [2024-06-20 15:24:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:24:07,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:24:07,546 INFO L175 Difference]: Start difference. First operand has 315 places, 358 transitions, 5855 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:24:07,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 386 transitions, 6740 flow [2024-06-20 15:24:09,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 386 transitions, 6254 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-20 15:24:09,597 INFO L231 Difference]: Finished difference. Result has 314 places, 347 transitions, 5390 flow [2024-06-20 15:24:09,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5377, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5390, PETRI_PLACES=314, PETRI_TRANSITIONS=347} [2024-06-20 15:24:09,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 15:24:09,598 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 347 transitions, 5390 flow [2024-06-20 15:24:09,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:09,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:09,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:09,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:24:09,598 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:09,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash -804980111, now seen corresponding path program 1 times [2024-06-20 15:24:09,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:09,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264027861] [2024-06-20 15:24:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:09,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:09,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264027861] [2024-06-20 15:24:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264027861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:09,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:09,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:09,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845341183] [2024-06-20 15:24:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:09,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:09,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:09,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:09,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 347 transitions, 5390 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:09,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:09,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:09,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:10,477 INFO L124 PetriNetUnfolderBase]: 2729/4666 cut-off events. [2024-06-20 15:24:10,477 INFO L125 PetriNetUnfolderBase]: For 469949/469949 co-relation queries the response was YES. [2024-06-20 15:24:10,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33214 conditions, 4666 events. 2729/4666 cut-off events. For 469949/469949 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30667 event pairs, 621 based on Foata normal form. 1/4664 useless extension candidates. Maximal degree in co-relation 33061. Up to 4180 conditions per place. [2024-06-20 15:24:10,535 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 38 changer transitions 0/381 dead transitions. [2024-06-20 15:24:10,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 381 transitions, 6441 flow [2024-06-20 15:24:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:24:10,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:24:10,536 INFO L175 Difference]: Start difference. First operand has 314 places, 347 transitions, 5390 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:24:10,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 381 transitions, 6441 flow [2024-06-20 15:24:12,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 381 transitions, 6049 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:12,243 INFO L231 Difference]: Finished difference. Result has 312 places, 350 transitions, 5129 flow [2024-06-20 15:24:12,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5129, PETRI_PLACES=312, PETRI_TRANSITIONS=350} [2024-06-20 15:24:12,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-20 15:24:12,243 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 350 transitions, 5129 flow [2024-06-20 15:24:12,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:12,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:12,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:12,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:24:12,244 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:12,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash -814836179, now seen corresponding path program 1 times [2024-06-20 15:24:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856623307] [2024-06-20 15:24:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:12,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:12,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856623307] [2024-06-20 15:24:12,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856623307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:12,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:12,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:12,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003812960] [2024-06-20 15:24:12,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:12,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:12,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 350 transitions, 5129 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:12,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:12,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:12,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:13,113 INFO L124 PetriNetUnfolderBase]: 2742/4675 cut-off events. [2024-06-20 15:24:13,113 INFO L125 PetriNetUnfolderBase]: For 471806/471806 co-relation queries the response was YES. [2024-06-20 15:24:13,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32987 conditions, 4675 events. 2742/4675 cut-off events. For 471806/471806 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30820 event pairs, 633 based on Foata normal form. 1/4670 useless extension candidates. Maximal degree in co-relation 32835. Up to 3956 conditions per place. [2024-06-20 15:24:13,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 122 changer transitions 0/374 dead transitions. [2024-06-20 15:24:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 374 transitions, 6199 flow [2024-06-20 15:24:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:24:13,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:24:13,171 INFO L175 Difference]: Start difference. First operand has 312 places, 350 transitions, 5129 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:24:13,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 374 transitions, 6199 flow [2024-06-20 15:24:14,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 374 transitions, 6103 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:14,964 INFO L231 Difference]: Finished difference. Result has 314 places, 356 transitions, 5491 flow [2024-06-20 15:24:14,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5491, PETRI_PLACES=314, PETRI_TRANSITIONS=356} [2024-06-20 15:24:14,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 15:24:14,964 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 356 transitions, 5491 flow [2024-06-20 15:24:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:14,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:14,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:24:14,965 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:14,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash -804860141, now seen corresponding path program 2 times [2024-06-20 15:24:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:14,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038719166] [2024-06-20 15:24:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:14,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:15,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038719166] [2024-06-20 15:24:15,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038719166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:15,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:15,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:15,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126240269] [2024-06-20 15:24:15,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:15,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:15,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:15,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:15,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:15,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 356 transitions, 5491 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:15,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:15,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:15,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:15,913 INFO L124 PetriNetUnfolderBase]: 2739/4680 cut-off events. [2024-06-20 15:24:15,914 INFO L125 PetriNetUnfolderBase]: For 478569/478569 co-relation queries the response was YES. [2024-06-20 15:24:15,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33424 conditions, 4680 events. 2739/4680 cut-off events. For 478569/478569 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30838 event pairs, 615 based on Foata normal form. 1/4678 useless extension candidates. Maximal degree in co-relation 33270. Up to 4195 conditions per place. [2024-06-20 15:24:15,973 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 38 changer transitions 0/387 dead transitions. [2024-06-20 15:24:15,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 387 transitions, 6327 flow [2024-06-20 15:24:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:24:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:24:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:24:15,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:24:15,975 INFO L175 Difference]: Start difference. First operand has 314 places, 356 transitions, 5491 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:24:15,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 387 transitions, 6327 flow [2024-06-20 15:24:17,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 387 transitions, 6107 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:17,448 INFO L231 Difference]: Finished difference. Result has 318 places, 356 transitions, 5353 flow [2024-06-20 15:24:17,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5353, PETRI_PLACES=318, PETRI_TRANSITIONS=356} [2024-06-20 15:24:17,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 15:24:17,449 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 356 transitions, 5353 flow [2024-06-20 15:24:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:17,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:17,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:24:17,450 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:17,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1348690093, now seen corresponding path program 3 times [2024-06-20 15:24:17,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:17,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098915496] [2024-06-20 15:24:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:17,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098915496] [2024-06-20 15:24:17,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098915496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:17,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:17,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:17,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744138755] [2024-06-20 15:24:17,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:17,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:17,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 356 transitions, 5353 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:17,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:17,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:17,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:18,359 INFO L124 PetriNetUnfolderBase]: 2816/4793 cut-off events. [2024-06-20 15:24:18,359 INFO L125 PetriNetUnfolderBase]: For 518960/518960 co-relation queries the response was YES. [2024-06-20 15:24:18,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 4793 events. 2816/4793 cut-off events. For 518960/518960 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31604 event pairs, 647 based on Foata normal form. 1/4779 useless extension candidates. Maximal degree in co-relation 34868. Up to 3812 conditions per place. [2024-06-20 15:24:18,419 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 197 changer transitions 0/405 dead transitions. [2024-06-20 15:24:18,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 405 transitions, 7388 flow [2024-06-20 15:24:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:24:18,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-20 15:24:18,423 INFO L175 Difference]: Start difference. First operand has 318 places, 356 transitions, 5353 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:24:18,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 405 transitions, 7388 flow [2024-06-20 15:24:20,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 405 transitions, 7300 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:24:20,222 INFO L231 Difference]: Finished difference. Result has 318 places, 378 transitions, 6112 flow [2024-06-20 15:24:20,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6112, PETRI_PLACES=318, PETRI_TRANSITIONS=378} [2024-06-20 15:24:20,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 15:24:20,223 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 378 transitions, 6112 flow [2024-06-20 15:24:20,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:20,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:20,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:24:20,224 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:20,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1338214573, now seen corresponding path program 4 times [2024-06-20 15:24:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:20,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503868789] [2024-06-20 15:24:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:20,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503868789] [2024-06-20 15:24:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503868789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:20,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:20,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931382135] [2024-06-20 15:24:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:20,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:20,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 378 transitions, 6112 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:20,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:20,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:20,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:21,138 INFO L124 PetriNetUnfolderBase]: 2829/4815 cut-off events. [2024-06-20 15:24:21,139 INFO L125 PetriNetUnfolderBase]: For 537231/537231 co-relation queries the response was YES. [2024-06-20 15:24:21,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35921 conditions, 4815 events. 2829/4815 cut-off events. For 537231/537231 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31818 event pairs, 647 based on Foata normal form. 1/4801 useless extension candidates. Maximal degree in co-relation 35766. Up to 3822 conditions per place. [2024-06-20 15:24:21,202 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 201 changer transitions 0/408 dead transitions. [2024-06-20 15:24:21,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 408 transitions, 7850 flow [2024-06-20 15:24:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:24:21,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:24:21,203 INFO L175 Difference]: Start difference. First operand has 318 places, 378 transitions, 6112 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:24:21,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 408 transitions, 7850 flow [2024-06-20 15:24:23,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 408 transitions, 7455 flow, removed 93 selfloop flow, removed 2 redundant places. [2024-06-20 15:24:23,011 INFO L231 Difference]: Finished difference. Result has 323 places, 384 transitions, 6269 flow [2024-06-20 15:24:23,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6269, PETRI_PLACES=323, PETRI_TRANSITIONS=384} [2024-06-20 15:24:23,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-20 15:24:23,011 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 384 transitions, 6269 flow [2024-06-20 15:24:23,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:23,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:23,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:23,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:24:23,012 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:23,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:23,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1547991883, now seen corresponding path program 5 times [2024-06-20 15:24:23,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:23,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375986392] [2024-06-20 15:24:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:23,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:23,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375986392] [2024-06-20 15:24:23,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375986392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:23,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:23,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346889515] [2024-06-20 15:24:23,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:23,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:23,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 384 transitions, 6269 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:23,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:23,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:23,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:23,990 INFO L124 PetriNetUnfolderBase]: 2858/4861 cut-off events. [2024-06-20 15:24:23,990 INFO L125 PetriNetUnfolderBase]: For 562743/562743 co-relation queries the response was YES. [2024-06-20 15:24:24,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 4861 events. 2858/4861 cut-off events. For 562743/562743 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32149 event pairs, 647 based on Foata normal form. 1/4847 useless extension candidates. Maximal degree in co-relation 36412. Up to 3847 conditions per place. [2024-06-20 15:24:24,052 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 207 changer transitions 0/424 dead transitions. [2024-06-20 15:24:24,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 424 transitions, 7970 flow [2024-06-20 15:24:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:24:24,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-20 15:24:24,054 INFO L175 Difference]: Start difference. First operand has 323 places, 384 transitions, 6269 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:24:24,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 424 transitions, 7970 flow [2024-06-20 15:24:25,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 424 transitions, 7568 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 15:24:25,986 INFO L231 Difference]: Finished difference. Result has 328 places, 394 transitions, 6524 flow [2024-06-20 15:24:25,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6524, PETRI_PLACES=328, PETRI_TRANSITIONS=394} [2024-06-20 15:24:25,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-20 15:24:25,986 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 394 transitions, 6524 flow [2024-06-20 15:24:25,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:25,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:25,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:24:25,987 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:25,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash 71949953, now seen corresponding path program 2 times [2024-06-20 15:24:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786102448] [2024-06-20 15:24:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:26,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:26,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786102448] [2024-06-20 15:24:26,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786102448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:26,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:26,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:26,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117484203] [2024-06-20 15:24:26,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:26,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:26,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:26,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 394 transitions, 6524 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:26,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:26,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:26,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:26,920 INFO L124 PetriNetUnfolderBase]: 2863/4843 cut-off events. [2024-06-20 15:24:26,920 INFO L125 PetriNetUnfolderBase]: For 577161/577161 co-relation queries the response was YES. [2024-06-20 15:24:26,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36724 conditions, 4843 events. 2863/4843 cut-off events. For 577161/577161 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31905 event pairs, 718 based on Foata normal form. 1/4828 useless extension candidates. Maximal degree in co-relation 36567. Up to 3851 conditions per place. [2024-06-20 15:24:26,989 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 180 changer transitions 0/416 dead transitions. [2024-06-20 15:24:26,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 416 transitions, 7840 flow [2024-06-20 15:24:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:24:26,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:24:26,991 INFO L175 Difference]: Start difference. First operand has 328 places, 394 transitions, 6524 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:24:26,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 416 transitions, 7840 flow [2024-06-20 15:24:29,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 416 transitions, 7346 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:29,306 INFO L231 Difference]: Finished difference. Result has 330 places, 397 transitions, 6475 flow [2024-06-20 15:24:29,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6475, PETRI_PLACES=330, PETRI_TRANSITIONS=397} [2024-06-20 15:24:29,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-20 15:24:29,307 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 397 transitions, 6475 flow [2024-06-20 15:24:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:29,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:29,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:29,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:24:29,307 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:29,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1261062725, now seen corresponding path program 6 times [2024-06-20 15:24:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:29,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965903901] [2024-06-20 15:24:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:29,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:29,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965903901] [2024-06-20 15:24:29,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965903901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:29,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:29,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656714395] [2024-06-20 15:24:29,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:29,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:29,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:29,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 397 transitions, 6475 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:29,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:29,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:29,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:30,371 INFO L124 PetriNetUnfolderBase]: 2868/4875 cut-off events. [2024-06-20 15:24:30,371 INFO L125 PetriNetUnfolderBase]: For 585759/585759 co-relation queries the response was YES. [2024-06-20 15:24:30,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36753 conditions, 4875 events. 2868/4875 cut-off events. For 585759/585759 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32196 event pairs, 646 based on Foata normal form. 1/4861 useless extension candidates. Maximal degree in co-relation 36595. Up to 3855 conditions per place. [2024-06-20 15:24:30,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 212 changer transitions 0/426 dead transitions. [2024-06-20 15:24:30,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 426 transitions, 7803 flow [2024-06-20 15:24:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:24:30,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:24:30,437 INFO L175 Difference]: Start difference. First operand has 330 places, 397 transitions, 6475 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:24:30,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 426 transitions, 7803 flow [2024-06-20 15:24:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 426 transitions, 7412 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:24:32,799 INFO L231 Difference]: Finished difference. Result has 334 places, 400 transitions, 6562 flow [2024-06-20 15:24:32,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6562, PETRI_PLACES=334, PETRI_TRANSITIONS=400} [2024-06-20 15:24:32,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-20 15:24:32,799 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 400 transitions, 6562 flow [2024-06-20 15:24:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:32,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:32,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:24:32,800 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:32,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash 220466291, now seen corresponding path program 3 times [2024-06-20 15:24:32,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:32,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829741107] [2024-06-20 15:24:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:32,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829741107] [2024-06-20 15:24:32,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829741107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:32,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:32,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660471258] [2024-06-20 15:24:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:32,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:32,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 400 transitions, 6562 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:32,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:32,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:32,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:33,716 INFO L124 PetriNetUnfolderBase]: 2873/4860 cut-off events. [2024-06-20 15:24:33,716 INFO L125 PetriNetUnfolderBase]: For 599376/599376 co-relation queries the response was YES. [2024-06-20 15:24:33,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36934 conditions, 4860 events. 2873/4860 cut-off events. For 599376/599376 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32098 event pairs, 719 based on Foata normal form. 1/4845 useless extension candidates. Maximal degree in co-relation 36775. Up to 3859 conditions per place. [2024-06-20 15:24:33,781 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 188 changer transitions 0/420 dead transitions. [2024-06-20 15:24:33,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 8075 flow [2024-06-20 15:24:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:24:33,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:24:33,782 INFO L175 Difference]: Start difference. First operand has 334 places, 400 transitions, 6562 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:24:33,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 8075 flow [2024-06-20 15:24:36,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 420 transitions, 7777 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:36,200 INFO L231 Difference]: Finished difference. Result has 336 places, 403 transitions, 6719 flow [2024-06-20 15:24:36,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6268, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6719, PETRI_PLACES=336, PETRI_TRANSITIONS=403} [2024-06-20 15:24:36,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-20 15:24:36,201 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 403 transitions, 6719 flow [2024-06-20 15:24:36,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:36,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:36,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:36,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:24:36,201 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:36,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1817601259, now seen corresponding path program 7 times [2024-06-20 15:24:36,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:36,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285858840] [2024-06-20 15:24:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285858840] [2024-06-20 15:24:36,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285858840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:36,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:36,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:36,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407572177] [2024-06-20 15:24:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:36,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:36,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 403 transitions, 6719 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:36,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:36,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:36,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:37,171 INFO L124 PetriNetUnfolderBase]: 2878/4888 cut-off events. [2024-06-20 15:24:37,171 INFO L125 PetriNetUnfolderBase]: For 611976/611976 co-relation queries the response was YES. [2024-06-20 15:24:37,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 4888 events. 2878/4888 cut-off events. For 611976/611976 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32273 event pairs, 645 based on Foata normal form. 1/4873 useless extension candidates. Maximal degree in co-relation 36982. Up to 3863 conditions per place. [2024-06-20 15:24:37,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 216 changer transitions 0/430 dead transitions. [2024-06-20 15:24:37,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 430 transitions, 8254 flow [2024-06-20 15:24:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:24:37,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:24:37,241 INFO L175 Difference]: Start difference. First operand has 336 places, 403 transitions, 6719 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:24:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 430 transitions, 8254 flow [2024-06-20 15:24:39,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 430 transitions, 7682 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:24:39,657 INFO L231 Difference]: Finished difference. Result has 337 places, 406 transitions, 6636 flow [2024-06-20 15:24:39,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6151, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6636, PETRI_PLACES=337, PETRI_TRANSITIONS=406} [2024-06-20 15:24:39,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-20 15:24:39,657 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 406 transitions, 6636 flow [2024-06-20 15:24:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:39,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:39,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:24:39,658 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:39,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:39,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1410285219, now seen corresponding path program 4 times [2024-06-20 15:24:39,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:39,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593935100] [2024-06-20 15:24:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:39,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593935100] [2024-06-20 15:24:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593935100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:39,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469278779] [2024-06-20 15:24:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:39,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:39,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 406 transitions, 6636 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:39,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:39,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:39,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:40,572 INFO L124 PetriNetUnfolderBase]: 2875/4869 cut-off events. [2024-06-20 15:24:40,572 INFO L125 PetriNetUnfolderBase]: For 618878/618878 co-relation queries the response was YES. [2024-06-20 15:24:40,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37029 conditions, 4869 events. 2875/4869 cut-off events. For 618878/618878 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32184 event pairs, 726 based on Foata normal form. 1/4854 useless extension candidates. Maximal degree in co-relation 36868. Up to 3861 conditions per place. [2024-06-20 15:24:40,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 185 changer transitions 0/422 dead transitions. [2024-06-20 15:24:40,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 422 transitions, 7894 flow [2024-06-20 15:24:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:24:40,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:24:40,639 INFO L175 Difference]: Start difference. First operand has 337 places, 406 transitions, 6636 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:24:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 422 transitions, 7894 flow [2024-06-20 15:24:43,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 422 transitions, 7545 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:24:43,258 INFO L231 Difference]: Finished difference. Result has 340 places, 406 transitions, 6665 flow [2024-06-20 15:24:43,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6665, PETRI_PLACES=340, PETRI_TRANSITIONS=406} [2024-06-20 15:24:43,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 15:24:43,258 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 406 transitions, 6665 flow [2024-06-20 15:24:43,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:43,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:43,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:24:43,259 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:43,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1547950055, now seen corresponding path program 8 times [2024-06-20 15:24:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:43,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125314814] [2024-06-20 15:24:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:43,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125314814] [2024-06-20 15:24:43,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125314814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:43,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:43,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:43,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223909331] [2024-06-20 15:24:43,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:43,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:43,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:43,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:43,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 406 transitions, 6665 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:43,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:43,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:43,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:44,264 INFO L124 PetriNetUnfolderBase]: 2872/4892 cut-off events. [2024-06-20 15:24:44,265 INFO L125 PetriNetUnfolderBase]: For 625300/625300 co-relation queries the response was YES. [2024-06-20 15:24:44,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37013 conditions, 4892 events. 2872/4892 cut-off events. For 625300/625300 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32337 event pairs, 655 based on Foata normal form. 1/4877 useless extension candidates. Maximal degree in co-relation 36851. Up to 3859 conditions per place. [2024-06-20 15:24:44,333 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 216 changer transitions 0/429 dead transitions. [2024-06-20 15:24:44,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 429 transitions, 7959 flow [2024-06-20 15:24:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:24:44,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:24:44,334 INFO L175 Difference]: Start difference. First operand has 340 places, 406 transitions, 6665 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:24:44,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 429 transitions, 7959 flow [2024-06-20 15:24:46,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 429 transitions, 7560 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:46,745 INFO L231 Difference]: Finished difference. Result has 342 places, 406 transitions, 6704 flow [2024-06-20 15:24:46,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6704, PETRI_PLACES=342, PETRI_TRANSITIONS=406} [2024-06-20 15:24:46,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-20 15:24:46,746 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 406 transitions, 6704 flow [2024-06-20 15:24:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:46,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:46,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:46,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:24:46,746 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:46,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1408063851, now seen corresponding path program 5 times [2024-06-20 15:24:46,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:46,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890888240] [2024-06-20 15:24:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:46,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890888240] [2024-06-20 15:24:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890888240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:46,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879726302] [2024-06-20 15:24:46,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:46,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:46,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:46,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 406 transitions, 6704 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:46,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:46,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:46,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:47,681 INFO L124 PetriNetUnfolderBase]: 2877/4902 cut-off events. [2024-06-20 15:24:47,681 INFO L125 PetriNetUnfolderBase]: For 637719/637719 co-relation queries the response was YES. [2024-06-20 15:24:47,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37237 conditions, 4902 events. 2877/4902 cut-off events. For 637719/637719 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32598 event pairs, 638 based on Foata normal form. 1/4897 useless extension candidates. Maximal degree in co-relation 37074. Up to 4105 conditions per place. [2024-06-20 15:24:47,748 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 117 changer transitions 0/426 dead transitions. [2024-06-20 15:24:47,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 426 transitions, 8047 flow [2024-06-20 15:24:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:47,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:24:47,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:24:47,749 INFO L175 Difference]: Start difference. First operand has 342 places, 406 transitions, 6704 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:24:47,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 426 transitions, 8047 flow [2024-06-20 15:24:50,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 426 transitions, 7448 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:50,345 INFO L231 Difference]: Finished difference. Result has 342 places, 409 transitions, 6414 flow [2024-06-20 15:24:50,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6414, PETRI_PLACES=342, PETRI_TRANSITIONS=409} [2024-06-20 15:24:50,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-20 15:24:50,345 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 409 transitions, 6414 flow [2024-06-20 15:24:50,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:50,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:50,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:50,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:24:50,346 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:50,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:50,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1383232381, now seen corresponding path program 6 times [2024-06-20 15:24:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:50,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314477307] [2024-06-20 15:24:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:50,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:50,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314477307] [2024-06-20 15:24:50,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314477307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:50,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:50,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:50,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340849183] [2024-06-20 15:24:50,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:50,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:50,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:50,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:50,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:50,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:50,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 409 transitions, 6414 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:50,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:50,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:50,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:51,299 INFO L124 PetriNetUnfolderBase]: 2882/4923 cut-off events. [2024-06-20 15:24:51,299 INFO L125 PetriNetUnfolderBase]: For 644848/644848 co-relation queries the response was YES. [2024-06-20 15:24:51,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37082 conditions, 4923 events. 2882/4923 cut-off events. For 644848/644848 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32854 event pairs, 650 based on Foata normal form. 1/4918 useless extension candidates. Maximal degree in co-relation 36918. Up to 4109 conditions per place. [2024-06-20 15:24:51,368 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 305 selfloop transitions, 118 changer transitions 0/431 dead transitions. [2024-06-20 15:24:51,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 431 transitions, 7779 flow [2024-06-20 15:24:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:24:51,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:24:51,369 INFO L175 Difference]: Start difference. First operand has 342 places, 409 transitions, 6414 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:24:51,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 431 transitions, 7779 flow [2024-06-20 15:24:53,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 431 transitions, 7488 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:53,998 INFO L231 Difference]: Finished difference. Result has 343 places, 412 transitions, 6434 flow [2024-06-20 15:24:53,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6434, PETRI_PLACES=343, PETRI_TRANSITIONS=412} [2024-06-20 15:24:53,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-20 15:24:53,999 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 412 transitions, 6434 flow [2024-06-20 15:24:53,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:53,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:53,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:53,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:24:53,999 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:53,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1343975759, now seen corresponding path program 9 times [2024-06-20 15:24:53,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:53,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657648735] [2024-06-20 15:24:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:54,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657648735] [2024-06-20 15:24:54,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657648735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:54,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:54,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156288043] [2024-06-20 15:24:54,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:54,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:54,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:54,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 412 transitions, 6434 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:54,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:54,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:54,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:55,033 INFO L124 PetriNetUnfolderBase]: 2879/4916 cut-off events. [2024-06-20 15:24:55,033 INFO L125 PetriNetUnfolderBase]: For 650424/650424 co-relation queries the response was YES. [2024-06-20 15:24:55,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37048 conditions, 4916 events. 2879/4916 cut-off events. For 650424/650424 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32675 event pairs, 620 based on Foata normal form. 1/4914 useless extension candidates. Maximal degree in co-relation 36883. Up to 4406 conditions per place. [2024-06-20 15:24:55,099 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-20 15:24:55,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 432 transitions, 7545 flow [2024-06-20 15:24:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:24:55,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:24:55,100 INFO L175 Difference]: Start difference. First operand has 343 places, 412 transitions, 6434 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:24:55,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 432 transitions, 7545 flow [2024-06-20 15:24:57,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 432 transitions, 7287 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:57,911 INFO L231 Difference]: Finished difference. Result has 346 places, 412 transitions, 6256 flow [2024-06-20 15:24:57,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6176, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6256, PETRI_PLACES=346, PETRI_TRANSITIONS=412} [2024-06-20 15:24:57,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 15:24:57,912 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 412 transitions, 6256 flow [2024-06-20 15:24:57,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:57,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:24:57,913 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:57,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1057491659, now seen corresponding path program 10 times [2024-06-20 15:24:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534830552] [2024-06-20 15:24:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:58,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534830552] [2024-06-20 15:24:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534830552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:58,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:58,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434513363] [2024-06-20 15:24:58,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:58,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:58,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:58,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 412 transitions, 6256 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:58,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:58,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:58,958 INFO L124 PetriNetUnfolderBase]: 2876/4912 cut-off events. [2024-06-20 15:24:58,958 INFO L125 PetriNetUnfolderBase]: For 655751/655751 co-relation queries the response was YES. [2024-06-20 15:24:59,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36709 conditions, 4912 events. 2876/4912 cut-off events. For 655751/655751 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32645 event pairs, 620 based on Foata normal form. 1/4910 useless extension candidates. Maximal degree in co-relation 36544. Up to 4403 conditions per place. [2024-06-20 15:24:59,026 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-20 15:24:59,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 432 transitions, 7163 flow [2024-06-20 15:24:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:24:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:24:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:24:59,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-20 15:24:59,027 INFO L175 Difference]: Start difference. First operand has 346 places, 412 transitions, 6256 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:24:59,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 432 transitions, 7163 flow [2024-06-20 15:25:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 432 transitions, 7085 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:01,941 INFO L231 Difference]: Finished difference. Result has 350 places, 412 transitions, 6258 flow [2024-06-20 15:25:01,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6178, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6258, PETRI_PLACES=350, PETRI_TRANSITIONS=412} [2024-06-20 15:25:01,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 15:25:01,942 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 412 transitions, 6258 flow [2024-06-20 15:25:01,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:01,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:01,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:25:01,942 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:01,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1182353331, now seen corresponding path program 7 times [2024-06-20 15:25:01,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:01,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999910699] [2024-06-20 15:25:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:01,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999910699] [2024-06-20 15:25:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999910699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920204842] [2024-06-20 15:25:02,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:02,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:02,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:02,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 412 transitions, 6258 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:02,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:02,898 INFO L124 PetriNetUnfolderBase]: 2873/4899 cut-off events. [2024-06-20 15:25:02,899 INFO L125 PetriNetUnfolderBase]: For 663085/663085 co-relation queries the response was YES. [2024-06-20 15:25:02,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36678 conditions, 4899 events. 2873/4899 cut-off events. For 663085/663085 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32604 event pairs, 640 based on Foata normal form. 1/4894 useless extension candidates. Maximal degree in co-relation 36512. Up to 4103 conditions per place. [2024-06-20 15:25:02,968 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 119 changer transitions 0/433 dead transitions. [2024-06-20 15:25:02,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 433 transitions, 7368 flow [2024-06-20 15:25:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:25:02,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:25:02,970 INFO L175 Difference]: Start difference. First operand has 350 places, 412 transitions, 6258 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:25:02,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 433 transitions, 7368 flow [2024-06-20 15:25:06,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 433 transitions, 7246 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-20 15:25:06,099 INFO L231 Difference]: Finished difference. Result has 348 places, 412 transitions, 6382 flow [2024-06-20 15:25:06,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6382, PETRI_PLACES=348, PETRI_TRANSITIONS=412} [2024-06-20 15:25:06,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-20 15:25:06,100 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 412 transitions, 6382 flow [2024-06-20 15:25:06,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:06,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:06,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:25:06,100 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:06,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1241823505, now seen corresponding path program 1 times [2024-06-20 15:25:06,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:06,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751916835] [2024-06-20 15:25:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:06,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:06,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751916835] [2024-06-20 15:25:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751916835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:06,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:06,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436258344] [2024-06-20 15:25:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:06,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:06,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 412 transitions, 6382 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:06,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:06,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:07,070 INFO L124 PetriNetUnfolderBase]: 2893/4935 cut-off events. [2024-06-20 15:25:07,070 INFO L125 PetriNetUnfolderBase]: For 704180/704180 co-relation queries the response was YES. [2024-06-20 15:25:07,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37210 conditions, 4935 events. 2893/4935 cut-off events. For 704180/704180 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32913 event pairs, 514 based on Foata normal form. 6/4935 useless extension candidates. Maximal degree in co-relation 37043. Up to 4222 conditions per place. [2024-06-20 15:25:07,143 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 403 selfloop transitions, 25 changer transitions 0/436 dead transitions. [2024-06-20 15:25:07,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 436 transitions, 7563 flow [2024-06-20 15:25:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:25:07,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:25:07,144 INFO L175 Difference]: Start difference. First operand has 348 places, 412 transitions, 6382 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:25:07,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 436 transitions, 7563 flow [2024-06-20 15:25:09,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 436 transitions, 7270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:09,746 INFO L231 Difference]: Finished difference. Result has 347 places, 413 transitions, 6156 flow [2024-06-20 15:25:09,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6156, PETRI_PLACES=347, PETRI_TRANSITIONS=413} [2024-06-20 15:25:09,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-20 15:25:09,746 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 413 transitions, 6156 flow [2024-06-20 15:25:09,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:09,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:25:09,747 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:09,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1683607861, now seen corresponding path program 2 times [2024-06-20 15:25:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448252024] [2024-06-20 15:25:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:09,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448252024] [2024-06-20 15:25:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448252024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:09,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:09,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:09,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380915670] [2024-06-20 15:25:09,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:09,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:09,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:09,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 413 transitions, 6156 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:09,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:09,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:10,698 INFO L124 PetriNetUnfolderBase]: 2880/4916 cut-off events. [2024-06-20 15:25:10,699 INFO L125 PetriNetUnfolderBase]: For 681157/681157 co-relation queries the response was YES. [2024-06-20 15:25:10,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36338 conditions, 4916 events. 2880/4916 cut-off events. For 681157/681157 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32763 event pairs, 503 based on Foata normal form. 6/4916 useless extension candidates. Maximal degree in co-relation 36170. Up to 4216 conditions per place. [2024-06-20 15:25:10,767 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 399 selfloop transitions, 25 changer transitions 1/433 dead transitions. [2024-06-20 15:25:10,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 433 transitions, 7102 flow [2024-06-20 15:25:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:25:10,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 15:25:10,768 INFO L175 Difference]: Start difference. First operand has 347 places, 413 transitions, 6156 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:25:10,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 433 transitions, 7102 flow [2024-06-20 15:25:14,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 433 transitions, 7030 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:14,014 INFO L231 Difference]: Finished difference. Result has 349 places, 413 transitions, 6140 flow [2024-06-20 15:25:14,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6140, PETRI_PLACES=349, PETRI_TRANSITIONS=413} [2024-06-20 15:25:14,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-20 15:25:14,015 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 413 transitions, 6140 flow [2024-06-20 15:25:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:25:14,015 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:14,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1112373681, now seen corresponding path program 1 times [2024-06-20 15:25:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699634370] [2024-06-20 15:25:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699634370] [2024-06-20 15:25:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699634370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:14,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304345967] [2024-06-20 15:25:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:14,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:14,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:14,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 413 transitions, 6140 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:14,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:14,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:15,152 INFO L124 PetriNetUnfolderBase]: 3019/5113 cut-off events. [2024-06-20 15:25:15,153 INFO L125 PetriNetUnfolderBase]: For 801122/801122 co-relation queries the response was YES. [2024-06-20 15:25:15,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40270 conditions, 5113 events. 3019/5113 cut-off events. For 801122/801122 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 33954 event pairs, 659 based on Foata normal form. 2/5093 useless extension candidates. Maximal degree in co-relation 40102. Up to 4276 conditions per place. [2024-06-20 15:25:15,216 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 124 changer transitions 0/450 dead transitions. [2024-06-20 15:25:15,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 450 transitions, 7494 flow [2024-06-20 15:25:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:25:15,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:25:15,217 INFO L175 Difference]: Start difference. First operand has 349 places, 413 transitions, 6140 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:25:15,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 450 transitions, 7494 flow [2024-06-20 15:25:18,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 450 transitions, 7423 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:18,141 INFO L231 Difference]: Finished difference. Result has 352 places, 421 transitions, 6529 flow [2024-06-20 15:25:18,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6529, PETRI_PLACES=352, PETRI_TRANSITIONS=421} [2024-06-20 15:25:18,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-20 15:25:18,142 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 421 transitions, 6529 flow [2024-06-20 15:25:18,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:18,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:18,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:25:18,143 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:18,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1338206637, now seen corresponding path program 2 times [2024-06-20 15:25:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:18,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861673410] [2024-06-20 15:25:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861673410] [2024-06-20 15:25:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861673410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:18,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:18,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:18,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292259467] [2024-06-20 15:25:18,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:18,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:18,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:18,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:18,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 421 transitions, 6529 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:18,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:19,155 INFO L124 PetriNetUnfolderBase]: 3014/5120 cut-off events. [2024-06-20 15:25:19,155 INFO L125 PetriNetUnfolderBase]: For 791597/791597 co-relation queries the response was YES. [2024-06-20 15:25:19,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40469 conditions, 5120 events. 3014/5120 cut-off events. For 791597/791597 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34142 event pairs, 674 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 40300. Up to 4422 conditions per place. [2024-06-20 15:25:19,230 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 317 selfloop transitions, 117 changer transitions 0/442 dead transitions. [2024-06-20 15:25:19,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 7449 flow [2024-06-20 15:25:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:25:19,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:25:19,231 INFO L175 Difference]: Start difference. First operand has 352 places, 421 transitions, 6529 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:25:19,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 7449 flow [2024-06-20 15:25:22,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 442 transitions, 7185 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:22,787 INFO L231 Difference]: Finished difference. Result has 355 places, 421 transitions, 6504 flow [2024-06-20 15:25:22,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6504, PETRI_PLACES=355, PETRI_TRANSITIONS=421} [2024-06-20 15:25:22,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-20 15:25:22,787 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 421 transitions, 6504 flow [2024-06-20 15:25:22,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:22,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:22,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:25:22,788 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:22,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1222915467, now seen corresponding path program 3 times [2024-06-20 15:25:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:22,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187247137] [2024-06-20 15:25:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:22,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187247137] [2024-06-20 15:25:22,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187247137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:22,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:22,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204802443] [2024-06-20 15:25:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:22,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:22,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:22,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:22,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 421 transitions, 6504 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:22,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:22,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:22,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:23,838 INFO L124 PetriNetUnfolderBase]: 3022/5124 cut-off events. [2024-06-20 15:25:23,838 INFO L125 PetriNetUnfolderBase]: For 805712/805712 co-relation queries the response was YES. [2024-06-20 15:25:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40543 conditions, 5124 events. 3022/5124 cut-off events. For 805712/805712 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34050 event pairs, 666 based on Foata normal form. 2/5113 useless extension candidates. Maximal degree in co-relation 40373. Up to 4434 conditions per place. [2024-06-20 15:25:23,911 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 116 changer transitions 0/445 dead transitions. [2024-06-20 15:25:23,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 445 transitions, 7479 flow [2024-06-20 15:25:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:25:23,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:25:23,912 INFO L175 Difference]: Start difference. First operand has 355 places, 421 transitions, 6504 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:25:23,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 445 transitions, 7479 flow [2024-06-20 15:25:26,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 445 transitions, 7250 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:27,002 INFO L231 Difference]: Finished difference. Result has 359 places, 423 transitions, 6563 flow [2024-06-20 15:25:27,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6563, PETRI_PLACES=359, PETRI_TRANSITIONS=423} [2024-06-20 15:25:27,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-20 15:25:27,003 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 423 transitions, 6563 flow [2024-06-20 15:25:27,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:27,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:27,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:25:27,004 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:27,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1496750709, now seen corresponding path program 4 times [2024-06-20 15:25:27,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:27,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743548667] [2024-06-20 15:25:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:27,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743548667] [2024-06-20 15:25:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743548667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:27,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590804966] [2024-06-20 15:25:27,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:27,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:27,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:27,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:27,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 423 transitions, 6563 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:27,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:27,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:27,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:28,024 INFO L124 PetriNetUnfolderBase]: 3030/5141 cut-off events. [2024-06-20 15:25:28,024 INFO L125 PetriNetUnfolderBase]: For 819993/819993 co-relation queries the response was YES. [2024-06-20 15:25:28,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40807 conditions, 5141 events. 3030/5141 cut-off events. For 819993/819993 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34259 event pairs, 637 based on Foata normal form. 2/5138 useless extension candidates. Maximal degree in co-relation 40636. Up to 4641 conditions per place. [2024-06-20 15:25:28,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 31 changer transitions 0/445 dead transitions. [2024-06-20 15:25:28,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 445 transitions, 7545 flow [2024-06-20 15:25:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:25:28,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-20 15:25:28,100 INFO L175 Difference]: Start difference. First operand has 359 places, 423 transitions, 6563 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:25:28,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 445 transitions, 7545 flow [2024-06-20 15:25:31,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 445 transitions, 7288 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:31,059 INFO L231 Difference]: Finished difference. Result has 362 places, 425 transitions, 6426 flow [2024-06-20 15:25:31,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6426, PETRI_PLACES=362, PETRI_TRANSITIONS=425} [2024-06-20 15:25:31,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 15:25:31,059 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 425 transitions, 6426 flow [2024-06-20 15:25:31,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:31,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:31,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:25:31,060 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:31,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2040038671, now seen corresponding path program 11 times [2024-06-20 15:25:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:31,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487294410] [2024-06-20 15:25:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487294410] [2024-06-20 15:25:31,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487294410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:31,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:31,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973473741] [2024-06-20 15:25:31,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:31,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:31,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 425 transitions, 6426 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:31,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:31,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:31,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:32,054 INFO L124 PetriNetUnfolderBase]: 3035/5140 cut-off events. [2024-06-20 15:25:32,054 INFO L125 PetriNetUnfolderBase]: For 829424/829430 co-relation queries the response was YES. [2024-06-20 15:25:32,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40734 conditions, 5140 events. 3035/5140 cut-off events. For 829424/829430 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34363 event pairs, 718 based on Foata normal form. 5/5134 useless extension candidates. Maximal degree in co-relation 40562. Up to 4104 conditions per place. [2024-06-20 15:25:32,130 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 193 changer transitions 0/450 dead transitions. [2024-06-20 15:25:32,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 450 transitions, 7866 flow [2024-06-20 15:25:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:25:32,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:25:32,132 INFO L175 Difference]: Start difference. First operand has 362 places, 425 transitions, 6426 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:25:32,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 450 transitions, 7866 flow [2024-06-20 15:25:35,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 450 transitions, 7777 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:35,410 INFO L231 Difference]: Finished difference. Result has 363 places, 428 transitions, 6791 flow [2024-06-20 15:25:35,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6791, PETRI_PLACES=363, PETRI_TRANSITIONS=428} [2024-06-20 15:25:35,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-20 15:25:35,411 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 428 transitions, 6791 flow [2024-06-20 15:25:35,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:35,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:35,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:25:35,411 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:35,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1951538127, now seen corresponding path program 12 times [2024-06-20 15:25:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310874281] [2024-06-20 15:25:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:35,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310874281] [2024-06-20 15:25:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310874281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:35,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19867475] [2024-06-20 15:25:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:35,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:35,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 428 transitions, 6791 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:35,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:35,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:36,561 INFO L124 PetriNetUnfolderBase]: 3040/5153 cut-off events. [2024-06-20 15:25:36,561 INFO L125 PetriNetUnfolderBase]: For 846888/846894 co-relation queries the response was YES. [2024-06-20 15:25:36,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41402 conditions, 5153 events. 3040/5153 cut-off events. For 846888/846894 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34421 event pairs, 720 based on Foata normal form. 5/5147 useless extension candidates. Maximal degree in co-relation 41229. Up to 4108 conditions per place. [2024-06-20 15:25:36,639 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 193 changer transitions 0/450 dead transitions. [2024-06-20 15:25:36,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 450 transitions, 8233 flow [2024-06-20 15:25:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:25:36,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:25:36,640 INFO L175 Difference]: Start difference. First operand has 363 places, 428 transitions, 6791 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:25:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 450 transitions, 8233 flow [2024-06-20 15:25:40,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 450 transitions, 7611 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:40,544 INFO L231 Difference]: Finished difference. Result has 365 places, 431 transitions, 6629 flow [2024-06-20 15:25:40,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6629, PETRI_PLACES=365, PETRI_TRANSITIONS=431} [2024-06-20 15:25:40,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-20 15:25:40,544 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 431 transitions, 6629 flow [2024-06-20 15:25:40,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:40,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:40,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:40,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:25:40,544 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:40,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1355861041, now seen corresponding path program 13 times [2024-06-20 15:25:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:40,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115599989] [2024-06-20 15:25:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:40,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:40,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115599989] [2024-06-20 15:25:40,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115599989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:40,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:40,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128747109] [2024-06-20 15:25:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:40,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:40,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 431 transitions, 6629 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:40,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:40,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:40,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:41,595 INFO L124 PetriNetUnfolderBase]: 3066/5197 cut-off events. [2024-06-20 15:25:41,595 INFO L125 PetriNetUnfolderBase]: For 877012/877018 co-relation queries the response was YES. [2024-06-20 15:25:41,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41829 conditions, 5197 events. 3066/5197 cut-off events. For 877012/877018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34795 event pairs, 720 based on Foata normal form. 6/5192 useless extension candidates. Maximal degree in co-relation 41656. Up to 4136 conditions per place. [2024-06-20 15:25:41,671 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 195 changer transitions 0/457 dead transitions. [2024-06-20 15:25:41,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 457 transitions, 8175 flow [2024-06-20 15:25:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:25:41,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:25:41,672 INFO L175 Difference]: Start difference. First operand has 365 places, 431 transitions, 6629 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:25:41,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 457 transitions, 8175 flow [2024-06-20 15:25:45,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 457 transitions, 7792 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:45,198 INFO L231 Difference]: Finished difference. Result has 368 places, 441 transitions, 6807 flow [2024-06-20 15:25:45,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6807, PETRI_PLACES=368, PETRI_TRANSITIONS=441} [2024-06-20 15:25:45,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 15:25:45,199 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 441 transitions, 6807 flow [2024-06-20 15:25:45,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:45,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:45,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:25:45,200 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:45,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash -247479179, now seen corresponding path program 14 times [2024-06-20 15:25:45,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:45,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771353359] [2024-06-20 15:25:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:45,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:45,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771353359] [2024-06-20 15:25:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771353359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:45,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670731890] [2024-06-20 15:25:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:45,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:45,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:45,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:45,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:45,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 441 transitions, 6807 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:45,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:45,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:45,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:46,292 INFO L124 PetriNetUnfolderBase]: 3063/5181 cut-off events. [2024-06-20 15:25:46,293 INFO L125 PetriNetUnfolderBase]: For 880238/880238 co-relation queries the response was YES. [2024-06-20 15:25:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41815 conditions, 5181 events. 3063/5181 cut-off events. For 880238/880238 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34599 event pairs, 752 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 41641. Up to 4134 conditions per place. [2024-06-20 15:25:46,372 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 212 changer transitions 0/467 dead transitions. [2024-06-20 15:25:46,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 467 transitions, 8241 flow [2024-06-20 15:25:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:25:46,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:25:46,373 INFO L175 Difference]: Start difference. First operand has 368 places, 441 transitions, 6807 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:25:46,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 467 transitions, 8241 flow [2024-06-20 15:25:50,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 467 transitions, 7950 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:50,261 INFO L231 Difference]: Finished difference. Result has 373 places, 441 transitions, 6946 flow [2024-06-20 15:25:50,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6946, PETRI_PLACES=373, PETRI_TRANSITIONS=441} [2024-06-20 15:25:50,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 15:25:50,262 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 441 transitions, 6946 flow [2024-06-20 15:25:50,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:50,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:50,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:50,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:25:50,263 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:50,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 371892567, now seen corresponding path program 15 times [2024-06-20 15:25:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:50,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359371276] [2024-06-20 15:25:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:50,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:50,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359371276] [2024-06-20 15:25:50,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359371276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:50,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:50,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:50,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789785978] [2024-06-20 15:25:50,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:50,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:50,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 441 transitions, 6946 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:50,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:50,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:50,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:51,480 INFO L124 PetriNetUnfolderBase]: 3068/5184 cut-off events. [2024-06-20 15:25:51,480 INFO L125 PetriNetUnfolderBase]: For 898897/898897 co-relation queries the response was YES. [2024-06-20 15:25:51,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42122 conditions, 5184 events. 3068/5184 cut-off events. For 898897/898897 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34601 event pairs, 761 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 41947. Up to 4138 conditions per place. [2024-06-20 15:25:51,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 212 changer transitions 0/466 dead transitions. [2024-06-20 15:25:51,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 466 transitions, 8223 flow [2024-06-20 15:25:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:25:51,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:25:51,559 INFO L175 Difference]: Start difference. First operand has 373 places, 441 transitions, 6946 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:25:51,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 466 transitions, 8223 flow [2024-06-20 15:25:55,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 466 transitions, 7456 flow, removed 56 selfloop flow, removed 10 redundant places. [2024-06-20 15:25:55,916 INFO L231 Difference]: Finished difference. Result has 371 places, 444 transitions, 6690 flow [2024-06-20 15:25:55,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6690, PETRI_PLACES=371, PETRI_TRANSITIONS=444} [2024-06-20 15:25:55,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 15:25:55,917 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 444 transitions, 6690 flow [2024-06-20 15:25:55,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:55,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:55,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:25:55,917 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:55,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1123057493, now seen corresponding path program 16 times [2024-06-20 15:25:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142782342] [2024-06-20 15:25:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:55,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:56,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142782342] [2024-06-20 15:25:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142782342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:56,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625355249] [2024-06-20 15:25:56,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:56,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:56,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 444 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:56,974 INFO L124 PetriNetUnfolderBase]: 3081/5196 cut-off events. [2024-06-20 15:25:56,975 INFO L125 PetriNetUnfolderBase]: For 918039/918039 co-relation queries the response was YES. [2024-06-20 15:25:57,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41934 conditions, 5196 events. 3081/5196 cut-off events. For 918039/918039 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34648 event pairs, 750 based on Foata normal form. 1/5181 useless extension candidates. Maximal degree in co-relation 41760. Up to 4148 conditions per place. [2024-06-20 15:25:57,053 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 217 changer transitions 0/470 dead transitions. [2024-06-20 15:25:57,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 470 transitions, 8221 flow [2024-06-20 15:25:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:25:57,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 15:25:57,054 INFO L175 Difference]: Start difference. First operand has 371 places, 444 transitions, 6690 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:25:57,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 470 transitions, 8221 flow [2024-06-20 15:26:01,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 470 transitions, 7929 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:01,058 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 6953 flow [2024-06-20 15:26:01,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6402, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6953, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-20 15:26:01,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 15:26:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 6953 flow [2024-06-20 15:26:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:01,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:01,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:26:01,059 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:01,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1503429281, now seen corresponding path program 17 times [2024-06-20 15:26:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124701573] [2024-06-20 15:26:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:01,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:01,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124701573] [2024-06-20 15:26:01,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124701573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:01,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:01,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57165319] [2024-06-20 15:26:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:01,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:01,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:01,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:01,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 6953 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:01,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:01,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:01,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:02,119 INFO L124 PetriNetUnfolderBase]: 3078/5190 cut-off events. [2024-06-20 15:26:02,120 INFO L125 PetriNetUnfolderBase]: For 930556/930556 co-relation queries the response was YES. [2024-06-20 15:26:02,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42033 conditions, 5190 events. 3078/5190 cut-off events. For 930556/930556 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34565 event pairs, 753 based on Foata normal form. 1/5175 useless extension candidates. Maximal degree in co-relation 41856. Up to 4146 conditions per place. [2024-06-20 15:26:02,200 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 214 changer transitions 0/469 dead transitions. [2024-06-20 15:26:02,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 469 transitions, 8153 flow [2024-06-20 15:26:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:26:02,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:26:02,201 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 6953 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:26:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 469 transitions, 8153 flow [2024-06-20 15:26:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 469 transitions, 7851 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:06,163 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 7085 flow [2024-06-20 15:26:06,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7085, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-20 15:26:06,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 15:26:06,164 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 7085 flow [2024-06-20 15:26:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:06,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:06,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:06,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:26:06,165 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:06,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash -214672839, now seen corresponding path program 18 times [2024-06-20 15:26:06,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:06,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43879715] [2024-06-20 15:26:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:06,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:06,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43879715] [2024-06-20 15:26:06,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43879715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:06,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:06,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618010902] [2024-06-20 15:26:06,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:06,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:06,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:06,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:06,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:06,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 7085 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:06,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:06,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:06,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:07,226 INFO L124 PetriNetUnfolderBase]: 3072/5194 cut-off events. [2024-06-20 15:26:07,227 INFO L125 PetriNetUnfolderBase]: For 942266/942266 co-relation queries the response was YES. [2024-06-20 15:26:07,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41969 conditions, 5194 events. 3072/5194 cut-off events. For 942266/942266 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34766 event pairs, 728 based on Foata normal form. 2/5180 useless extension candidates. Maximal degree in co-relation 41790. Up to 4141 conditions per place. [2024-06-20 15:26:07,305 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 209 changer transitions 0/467 dead transitions. [2024-06-20 15:26:07,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 467 transitions, 8511 flow [2024-06-20 15:26:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:26:07,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 15:26:07,307 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 7085 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:26:07,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 467 transitions, 8511 flow [2024-06-20 15:26:11,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 467 transitions, 7915 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:11,076 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6914 flow [2024-06-20 15:26:11,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6914, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-20 15:26:11,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 15:26:11,077 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6914 flow [2024-06-20 15:26:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:11,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:11,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:26:11,078 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:11,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 147000181, now seen corresponding path program 19 times [2024-06-20 15:26:11,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916454125] [2024-06-20 15:26:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916454125] [2024-06-20 15:26:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916454125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:11,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:11,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422871157] [2024-06-20 15:26:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:11,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:11,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:11,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6914 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:11,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:11,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:11,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:12,168 INFO L124 PetriNetUnfolderBase]: 3066/5198 cut-off events. [2024-06-20 15:26:12,169 INFO L125 PetriNetUnfolderBase]: For 938204/938204 co-relation queries the response was YES. [2024-06-20 15:26:12,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41714 conditions, 5198 events. 3066/5198 cut-off events. For 938204/938204 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34853 event pairs, 738 based on Foata normal form. 2/5184 useless extension candidates. Maximal degree in co-relation 41535. Up to 4136 conditions per place. [2024-06-20 15:26:12,246 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 216 changer transitions 0/470 dead transitions. [2024-06-20 15:26:12,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 470 transitions, 8592 flow [2024-06-20 15:26:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:26:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:26:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-20 15:26:12,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-20 15:26:12,247 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6914 flow. Second operand 10 states and 239 transitions. [2024-06-20 15:26:12,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 470 transitions, 8592 flow [2024-06-20 15:26:16,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 470 transitions, 7967 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:16,705 INFO L231 Difference]: Finished difference. Result has 381 places, 450 transitions, 6728 flow [2024-06-20 15:26:16,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6728, PETRI_PLACES=381, PETRI_TRANSITIONS=450} [2024-06-20 15:26:16,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-20 15:26:16,706 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 450 transitions, 6728 flow [2024-06-20 15:26:16,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:16,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:26:16,706 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:16,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 146792791, now seen corresponding path program 20 times [2024-06-20 15:26:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470139113] [2024-06-20 15:26:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470139113] [2024-06-20 15:26:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470139113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:16,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470077453] [2024-06-20 15:26:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:16,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:16,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 450 transitions, 6728 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:16,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,746 INFO L124 PetriNetUnfolderBase]: 3060/5178 cut-off events. [2024-06-20 15:26:17,747 INFO L125 PetriNetUnfolderBase]: For 935885/935885 co-relation queries the response was YES. [2024-06-20 15:26:17,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41201 conditions, 5178 events. 3060/5178 cut-off events. For 935885/935885 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34651 event pairs, 762 based on Foata normal form. 2/5164 useless extension candidates. Maximal degree in co-relation 41022. Up to 4131 conditions per place. [2024-06-20 15:26:17,823 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 209 changer transitions 0/466 dead transitions. [2024-06-20 15:26:17,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 466 transitions, 7920 flow [2024-06-20 15:26:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:26:17,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:26:17,824 INFO L175 Difference]: Start difference. First operand has 381 places, 450 transitions, 6728 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:26:17,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 466 transitions, 7920 flow [2024-06-20 15:26:21,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 466 transitions, 7220 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:21,719 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6453 flow [2024-06-20 15:26:21,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6028, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6453, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-20 15:26:21,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 15:26:21,720 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6453 flow [2024-06-20 15:26:21,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:21,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:21,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:21,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:26:21,720 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:21,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -36375597, now seen corresponding path program 21 times [2024-06-20 15:26:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529539640] [2024-06-20 15:26:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:21,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:21,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529539640] [2024-06-20 15:26:21,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529539640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:21,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:21,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457460899] [2024-06-20 15:26:21,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:21,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:21,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6453 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:21,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:21,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:21,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:22,851 INFO L124 PetriNetUnfolderBase]: 3054/5196 cut-off events. [2024-06-20 15:26:22,852 INFO L125 PetriNetUnfolderBase]: For 930137/930137 co-relation queries the response was YES. [2024-06-20 15:26:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40737 conditions, 5196 events. 3054/5196 cut-off events. For 930137/930137 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34825 event pairs, 639 based on Foata normal form. 2/5195 useless extension candidates. Maximal degree in co-relation 40559. Up to 4380 conditions per place. [2024-06-20 15:26:22,923 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 133 changer transitions 0/483 dead transitions. [2024-06-20 15:26:22,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 483 transitions, 8205 flow [2024-06-20 15:26:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:26:22,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-20 15:26:22,925 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6453 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:26:22,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 483 transitions, 8205 flow [2024-06-20 15:26:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 483 transitions, 7708 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:26,654 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6237 flow [2024-06-20 15:26:26,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6237, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-20 15:26:26,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 15:26:26,654 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6237 flow [2024-06-20 15:26:26,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:26,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:26,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:26,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:26:26,655 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:26,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash 220124913, now seen corresponding path program 22 times [2024-06-20 15:26:26,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:26,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518854636] [2024-06-20 15:26:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518854636] [2024-06-20 15:26:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518854636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:26,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90657451] [2024-06-20 15:26:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:26,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:26,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6237 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:26,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:26,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:27,687 INFO L124 PetriNetUnfolderBase]: 3048/5175 cut-off events. [2024-06-20 15:26:27,687 INFO L125 PetriNetUnfolderBase]: For 927641/927641 co-relation queries the response was YES. [2024-06-20 15:26:27,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 5175 events. 3048/5175 cut-off events. For 927641/927641 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34686 event pairs, 657 based on Foata normal form. 2/5171 useless extension candidates. Maximal degree in co-relation 40140. Up to 4375 conditions per place. [2024-06-20 15:26:27,764 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 117 changer transitions 0/474 dead transitions. [2024-06-20 15:26:27,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 474 transitions, 7471 flow [2024-06-20 15:26:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:26:27,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:26:27,765 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6237 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:26:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 474 transitions, 7471 flow [2024-06-20 15:26:31,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 474 transitions, 7174 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:31,702 INFO L231 Difference]: Finished difference. Result has 377 places, 450 transitions, 6189 flow [2024-06-20 15:26:31,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6189, PETRI_PLACES=377, PETRI_TRANSITIONS=450} [2024-06-20 15:26:31,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 15:26:31,702 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 450 transitions, 6189 flow [2024-06-20 15:26:31,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:31,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:31,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:31,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:26:31,702 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:31,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:31,703 INFO L85 PathProgramCache]: Analyzing trace with hash -36582987, now seen corresponding path program 23 times [2024-06-20 15:26:31,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:31,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296855298] [2024-06-20 15:26:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:31,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:31,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296855298] [2024-06-20 15:26:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296855298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:31,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042798517] [2024-06-20 15:26:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:31,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:31,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:31,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 450 transitions, 6189 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:31,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:31,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:31,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:32,889 INFO L124 PetriNetUnfolderBase]: 3042/5167 cut-off events. [2024-06-20 15:26:32,889 INFO L125 PetriNetUnfolderBase]: For 898642/898642 co-relation queries the response was YES. [2024-06-20 15:26:32,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39894 conditions, 5167 events. 3042/5167 cut-off events. For 898642/898642 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34677 event pairs, 657 based on Foata normal form. 2/5163 useless extension candidates. Maximal degree in co-relation 39716. Up to 4370 conditions per place. [2024-06-20 15:26:32,965 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 352 selfloop transitions, 118 changer transitions 0/478 dead transitions. [2024-06-20 15:26:32,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 478 transitions, 7439 flow [2024-06-20 15:26:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:26:32,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-20 15:26:32,966 INFO L175 Difference]: Start difference. First operand has 377 places, 450 transitions, 6189 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:26:32,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 478 transitions, 7439 flow [2024-06-20 15:26:36,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 478 transitions, 6955 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:36,831 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 5954 flow [2024-06-20 15:26:36,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5954, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-20 15:26:36,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 15:26:36,831 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 5954 flow [2024-06-20 15:26:36,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:36,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:36,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:36,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:26:36,832 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:36,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash 18982899, now seen corresponding path program 24 times [2024-06-20 15:26:36,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:36,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849035649] [2024-06-20 15:26:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:36,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:36,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:36,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849035649] [2024-06-20 15:26:36,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849035649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:36,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:36,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:36,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555733068] [2024-06-20 15:26:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:36,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:36,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 5954 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:36,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:36,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:36,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:37,926 INFO L124 PetriNetUnfolderBase]: 3036/5168 cut-off events. [2024-06-20 15:26:37,926 INFO L125 PetriNetUnfolderBase]: For 880535/880535 co-relation queries the response was YES. [2024-06-20 15:26:37,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39470 conditions, 5168 events. 3036/5168 cut-off events. For 880535/880535 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34621 event pairs, 637 based on Foata normal form. 2/5167 useless extension candidates. Maximal degree in co-relation 39293. Up to 4365 conditions per place. [2024-06-20 15:26:38,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 129 changer transitions 0/485 dead transitions. [2024-06-20 15:26:38,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 485 transitions, 7236 flow [2024-06-20 15:26:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:26:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:26:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-20 15:26:38,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368563685636857 [2024-06-20 15:26:38,003 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 5954 flow. Second operand 9 states and 235 transitions. [2024-06-20 15:26:38,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 485 transitions, 7236 flow [2024-06-20 15:26:41,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 485 transitions, 7034 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:41,549 INFO L231 Difference]: Finished difference. Result has 376 places, 450 transitions, 6027 flow [2024-06-20 15:26:41,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=376, PETRI_TRANSITIONS=450} [2024-06-20 15:26:41,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 15:26:41,550 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 450 transitions, 6027 flow [2024-06-20 15:26:41,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:41,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:41,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:41,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:26:41,550 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:41,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:41,550 INFO L85 PathProgramCache]: Analyzing trace with hash 696849013, now seen corresponding path program 5 times [2024-06-20 15:26:41,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:41,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134715912] [2024-06-20 15:26:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:41,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134715912] [2024-06-20 15:26:41,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134715912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:41,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:41,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138568603] [2024-06-20 15:26:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:41,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:41,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 450 transitions, 6027 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:41,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:41,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:41,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:42,631 INFO L124 PetriNetUnfolderBase]: 3044/5167 cut-off events. [2024-06-20 15:26:42,631 INFO L125 PetriNetUnfolderBase]: For 884056/884056 co-relation queries the response was YES. [2024-06-20 15:26:42,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39654 conditions, 5167 events. 3044/5167 cut-off events. For 884056/884056 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34661 event pairs, 688 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 39477. Up to 4469 conditions per place. [2024-06-20 15:26:42,709 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 103 changer transitions 0/471 dead transitions. [2024-06-20 15:26:42,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 471 transitions, 7050 flow [2024-06-20 15:26:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:26:42,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:26:42,710 INFO L175 Difference]: Start difference. First operand has 376 places, 450 transitions, 6027 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:26:42,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 471 transitions, 7050 flow [2024-06-20 15:26:46,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 471 transitions, 6731 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:46,813 INFO L231 Difference]: Finished difference. Result has 373 places, 452 transitions, 5974 flow [2024-06-20 15:26:46,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5708, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=373, PETRI_TRANSITIONS=452} [2024-06-20 15:26:46,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 15:26:46,813 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 452 transitions, 5974 flow [2024-06-20 15:26:46,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:46,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:46,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:46,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:26:46,814 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1762495345, now seen corresponding path program 6 times [2024-06-20 15:26:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38015079] [2024-06-20 15:26:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:46,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:46,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38015079] [2024-06-20 15:26:46,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38015079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:46,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:46,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612497492] [2024-06-20 15:26:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:46,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:46,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:46,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 452 transitions, 5974 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:46,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:46,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:46,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:47,916 INFO L124 PetriNetUnfolderBase]: 3229/5509 cut-off events. [2024-06-20 15:26:47,916 INFO L125 PetriNetUnfolderBase]: For 1087712/1087718 co-relation queries the response was YES. [2024-06-20 15:26:47,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45233 conditions, 5509 events. 3229/5509 cut-off events. For 1087712/1087718 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37519 event pairs, 750 based on Foata normal form. 6/5506 useless extension candidates. Maximal degree in co-relation 45057. Up to 4549 conditions per place. [2024-06-20 15:26:48,000 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 371 selfloop transitions, 107 changer transitions 0/486 dead transitions. [2024-06-20 15:26:48,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 486 transitions, 7432 flow [2024-06-20 15:26:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:26:48,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:26:48,001 INFO L175 Difference]: Start difference. First operand has 373 places, 452 transitions, 5974 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:26:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 486 transitions, 7432 flow [2024-06-20 15:26:51,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 486 transitions, 7199 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:51,943 INFO L231 Difference]: Finished difference. Result has 376 places, 460 transitions, 6180 flow [2024-06-20 15:26:51,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6180, PETRI_PLACES=376, PETRI_TRANSITIONS=460} [2024-06-20 15:26:51,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 15:26:51,943 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 460 transitions, 6180 flow [2024-06-20 15:26:51,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:51,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:51,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:51,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:26:51,943 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1951530191, now seen corresponding path program 7 times [2024-06-20 15:26:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:51,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276877524] [2024-06-20 15:26:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:51,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276877524] [2024-06-20 15:26:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276877524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814914820] [2024-06-20 15:26:52,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:52,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:52,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:52,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 460 transitions, 6180 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:52,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:52,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:53,025 INFO L124 PetriNetUnfolderBase]: 3237/5528 cut-off events. [2024-06-20 15:26:53,026 INFO L125 PetriNetUnfolderBase]: For 1106521/1106527 co-relation queries the response was YES. [2024-06-20 15:26:53,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45819 conditions, 5528 events. 3237/5528 cut-off events. For 1106521/1106527 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37711 event pairs, 759 based on Foata normal form. 6/5527 useless extension candidates. Maximal degree in co-relation 45641. Up to 4760 conditions per place. [2024-06-20 15:26:53,110 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 372 selfloop transitions, 100 changer transitions 0/480 dead transitions. [2024-06-20 15:26:53,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 480 transitions, 7219 flow [2024-06-20 15:26:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:26:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:26:53,111 INFO L175 Difference]: Start difference. First operand has 376 places, 460 transitions, 6180 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:26:53,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 480 transitions, 7219 flow [2024-06-20 15:26:57,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 480 transitions, 6964 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:57,813 INFO L231 Difference]: Finished difference. Result has 379 places, 462 transitions, 6185 flow [2024-06-20 15:26:57,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5933, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6185, PETRI_PLACES=379, PETRI_TRANSITIONS=462} [2024-06-20 15:26:57,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-20 15:26:57,813 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 462 transitions, 6185 flow [2024-06-20 15:26:57,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:57,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:57,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:57,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:26:57,814 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:57,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 326020347, now seen corresponding path program 8 times [2024-06-20 15:26:57,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:57,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340731193] [2024-06-20 15:26:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:57,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:57,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340731193] [2024-06-20 15:26:57,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340731193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:57,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:57,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:26:57,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513029691] [2024-06-20 15:26:57,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:57,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:26:57,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:26:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:26:57,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:57,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 462 transitions, 6185 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:57,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:57,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:59,072 INFO L124 PetriNetUnfolderBase]: 3245/5554 cut-off events. [2024-06-20 15:26:59,072 INFO L125 PetriNetUnfolderBase]: For 1122566/1122572 co-relation queries the response was YES. [2024-06-20 15:26:59,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45798 conditions, 5554 events. 3245/5554 cut-off events. For 1122566/1122572 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37842 event pairs, 604 based on Foata normal form. 6/5553 useless extension candidates. Maximal degree in co-relation 45619. Up to 3373 conditions per place. [2024-06-20 15:26:59,146 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 133 changer transitions 0/495 dead transitions. [2024-06-20 15:26:59,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 495 transitions, 7788 flow [2024-06-20 15:26:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:26:59,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:26:59,147 INFO L175 Difference]: Start difference. First operand has 379 places, 462 transitions, 6185 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:26:59,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 495 transitions, 7788 flow [2024-06-20 15:27:03,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 495 transitions, 7569 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:27:03,885 INFO L231 Difference]: Finished difference. Result has 382 places, 464 transitions, 6282 flow [2024-06-20 15:27:03,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6282, PETRI_PLACES=382, PETRI_TRANSITIONS=464} [2024-06-20 15:27:03,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 15:27:03,886 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 464 transitions, 6282 flow [2024-06-20 15:27:03,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:03,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:03,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:27:03,886 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:03,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1380146383, now seen corresponding path program 9 times [2024-06-20 15:27:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:03,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789883675] [2024-06-20 15:27:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789883675] [2024-06-20 15:27:03,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789883675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:03,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577399264] [2024-06-20 15:27:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:04,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:04,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 464 transitions, 6282 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:04,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:04,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:05,028 INFO L124 PetriNetUnfolderBase]: 3220/5502 cut-off events. [2024-06-20 15:27:05,028 INFO L125 PetriNetUnfolderBase]: For 1129442/1129448 co-relation queries the response was YES. [2024-06-20 15:27:05,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45300 conditions, 5502 events. 3220/5502 cut-off events. For 1129442/1129448 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37480 event pairs, 669 based on Foata normal form. 12/5507 useless extension candidates. Maximal degree in co-relation 45120. Up to 3359 conditions per place. [2024-06-20 15:27:05,111 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 120 changer transitions 0/492 dead transitions. [2024-06-20 15:27:05,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 492 transitions, 7592 flow [2024-06-20 15:27:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:27:05,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:27:05,112 INFO L175 Difference]: Start difference. First operand has 382 places, 464 transitions, 6282 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:27:05,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 492 transitions, 7592 flow [2024-06-20 15:27:09,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 492 transitions, 7224 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:09,758 INFO L231 Difference]: Finished difference. Result has 383 places, 464 transitions, 6160 flow [2024-06-20 15:27:09,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6160, PETRI_PLACES=383, PETRI_TRANSITIONS=464} [2024-06-20 15:27:09,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-20 15:27:09,758 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 464 transitions, 6160 flow [2024-06-20 15:27:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:27:09,759 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1355868977, now seen corresponding path program 10 times [2024-06-20 15:27:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671817587] [2024-06-20 15:27:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:09,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671817587] [2024-06-20 15:27:09,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671817587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559696368] [2024-06-20 15:27:09,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:09,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:09,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 464 transitions, 6160 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:09,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:10,864 INFO L124 PetriNetUnfolderBase]: 3197/5470 cut-off events. [2024-06-20 15:27:10,864 INFO L125 PetriNetUnfolderBase]: For 1083210/1083216 co-relation queries the response was YES. [2024-06-20 15:27:10,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43313 conditions, 5470 events. 3197/5470 cut-off events. For 1083210/1083216 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37333 event pairs, 741 based on Foata normal form. 14/5477 useless extension candidates. Maximal degree in co-relation 43134. Up to 4668 conditions per place. [2024-06-20 15:27:10,949 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 382 selfloop transitions, 92 changer transitions 0/482 dead transitions. [2024-06-20 15:27:10,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 482 transitions, 7164 flow [2024-06-20 15:27:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:10,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:27:10,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-20 15:27:10,950 INFO L175 Difference]: Start difference. First operand has 383 places, 464 transitions, 6160 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:27:10,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 482 transitions, 7164 flow [2024-06-20 15:27:15,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 482 transitions, 6906 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:15,404 INFO L231 Difference]: Finished difference. Result has 384 places, 464 transitions, 6092 flow [2024-06-20 15:27:15,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5902, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6092, PETRI_PLACES=384, PETRI_TRANSITIONS=464} [2024-06-20 15:27:15,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-20 15:27:15,405 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 464 transitions, 6092 flow [2024-06-20 15:27:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:15,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:15,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:15,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:27:15,405 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:15,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1322053933, now seen corresponding path program 11 times [2024-06-20 15:27:15,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:15,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110897462] [2024-06-20 15:27:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:15,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110897462] [2024-06-20 15:27:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110897462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:15,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:15,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927560944] [2024-06-20 15:27:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:15,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:15,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 464 transitions, 6092 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:15,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:15,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:16,569 INFO L124 PetriNetUnfolderBase]: 3167/5420 cut-off events. [2024-06-20 15:27:16,570 INFO L125 PetriNetUnfolderBase]: For 1019579/1019585 co-relation queries the response was YES. [2024-06-20 15:27:16,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41451 conditions, 5420 events. 3167/5420 cut-off events. For 1019579/1019585 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37001 event pairs, 711 based on Foata normal form. 14/5427 useless extension candidates. Maximal degree in co-relation 41271. Up to 4416 conditions per place. [2024-06-20 15:27:16,657 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 381 selfloop transitions, 97 changer transitions 0/486 dead transitions. [2024-06-20 15:27:16,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 486 transitions, 7126 flow [2024-06-20 15:27:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:27:16,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:27:16,658 INFO L175 Difference]: Start difference. First operand has 384 places, 464 transitions, 6092 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:27:16,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 486 transitions, 7126 flow [2024-06-20 15:27:21,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 486 transitions, 6904 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:21,204 INFO L231 Difference]: Finished difference. Result has 386 places, 464 transitions, 6071 flow [2024-06-20 15:27:21,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6071, PETRI_PLACES=386, PETRI_TRANSITIONS=464} [2024-06-20 15:27:21,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-20 15:27:21,205 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 464 transitions, 6071 flow [2024-06-20 15:27:21,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:21,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:27:21,205 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:21,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash -774155373, now seen corresponding path program 12 times [2024-06-20 15:27:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:21,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195580521] [2024-06-20 15:27:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:21,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:21,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195580521] [2024-06-20 15:27:21,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195580521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:21,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:21,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606699731] [2024-06-20 15:27:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:21,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:21,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:21,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 464 transitions, 6071 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:21,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:21,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:22,338 INFO L124 PetriNetUnfolderBase]: 3144/5381 cut-off events. [2024-06-20 15:27:22,338 INFO L125 PetriNetUnfolderBase]: For 955759/955759 co-relation queries the response was YES. [2024-06-20 15:27:22,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39869 conditions, 5381 events. 3144/5381 cut-off events. For 955759/955759 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36726 event pairs, 720 based on Foata normal form. 10/5383 useless extension candidates. Maximal degree in co-relation 39688. Up to 4589 conditions per place. [2024-06-20 15:27:22,422 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 103 changer transitions 0/485 dead transitions. [2024-06-20 15:27:22,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 485 transitions, 7087 flow [2024-06-20 15:27:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:27:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:27:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:27:22,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:27:22,423 INFO L175 Difference]: Start difference. First operand has 386 places, 464 transitions, 6071 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:27:22,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 485 transitions, 7087 flow [2024-06-20 15:27:26,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 485 transitions, 6878 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:26,165 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 6074 flow [2024-06-20 15:27:26,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6074, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-20 15:27:26,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 15:27:26,166 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 6074 flow [2024-06-20 15:27:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:26,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:26,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:26,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:27:26,166 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:26,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash 412705397, now seen corresponding path program 13 times [2024-06-20 15:27:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:26,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094917326] [2024-06-20 15:27:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:26,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:26,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094917326] [2024-06-20 15:27:26,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094917326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:26,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:26,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028721666] [2024-06-20 15:27:26,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:26,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:26,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 6074 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:26,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:26,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:26,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:27,404 INFO L124 PetriNetUnfolderBase]: 3121/5348 cut-off events. [2024-06-20 15:27:27,404 INFO L125 PetriNetUnfolderBase]: For 890110/890110 co-relation queries the response was YES. [2024-06-20 15:27:27,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38447 conditions, 5348 events. 3121/5348 cut-off events. For 890110/890110 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36450 event pairs, 711 based on Foata normal form. 10/5350 useless extension candidates. Maximal degree in co-relation 38265. Up to 4556 conditions per place. [2024-06-20 15:27:27,479 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 99 changer transitions 0/483 dead transitions. [2024-06-20 15:27:27,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 483 transitions, 7082 flow [2024-06-20 15:27:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:27:27,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:27:27,480 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 6074 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:27:27,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 483 transitions, 7082 flow [2024-06-20 15:27:31,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 483 transitions, 6848 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:31,801 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 6044 flow [2024-06-20 15:27:31,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6044, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-20 15:27:31,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 15:27:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 6044 flow [2024-06-20 15:27:31,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:31,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:31,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:27:31,802 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 413031827, now seen corresponding path program 14 times [2024-06-20 15:27:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711967533] [2024-06-20 15:27:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:31,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:31,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711967533] [2024-06-20 15:27:31,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711967533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:31,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:31,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:31,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69347925] [2024-06-20 15:27:31,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:31,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:31,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:31,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 6044 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:31,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:31,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:31,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:32,926 INFO L124 PetriNetUnfolderBase]: 3091/5300 cut-off events. [2024-06-20 15:27:32,926 INFO L125 PetriNetUnfolderBase]: For 820510/820510 co-relation queries the response was YES. [2024-06-20 15:27:32,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36771 conditions, 5300 events. 3091/5300 cut-off events. For 820510/820510 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36138 event pairs, 681 based on Foata normal form. 10/5302 useless extension candidates. Maximal degree in co-relation 36588. Up to 4182 conditions per place. [2024-06-20 15:27:33,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 106 changer transitions 0/487 dead transitions. [2024-06-20 15:27:33,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 487 transitions, 7082 flow [2024-06-20 15:27:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:27:33,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:27:33,008 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 6044 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:27:33,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 487 transitions, 7082 flow [2024-06-20 15:27:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 487 transitions, 6844 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:37,252 INFO L231 Difference]: Finished difference. Result has 392 places, 464 transitions, 6026 flow [2024-06-20 15:27:37,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6026, PETRI_PLACES=392, PETRI_TRANSITIONS=464} [2024-06-20 15:27:37,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-20 15:27:37,252 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 464 transitions, 6026 flow [2024-06-20 15:27:37,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:37,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:37,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:27:37,253 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:37,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash 575289485, now seen corresponding path program 1 times [2024-06-20 15:27:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:37,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390946032] [2024-06-20 15:27:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:37,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390946032] [2024-06-20 15:27:37,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390946032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:37,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716313797] [2024-06-20 15:27:37,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:37,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:37,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:37,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:37,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 464 transitions, 6026 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:37,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:37,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:37,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:38,346 INFO L124 PetriNetUnfolderBase]: 3099/5307 cut-off events. [2024-06-20 15:27:38,346 INFO L125 PetriNetUnfolderBase]: For 769248/769248 co-relation queries the response was YES. [2024-06-20 15:27:38,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36820 conditions, 5307 events. 3099/5307 cut-off events. For 769248/769248 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36206 event pairs, 708 based on Foata normal form. 2/5301 useless extension candidates. Maximal degree in co-relation 36636. Up to 4554 conditions per place. [2024-06-20 15:27:38,424 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 98 changer transitions 0/481 dead transitions. [2024-06-20 15:27:38,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 481 transitions, 7074 flow [2024-06-20 15:27:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:27:38,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-20 15:27:38,425 INFO L175 Difference]: Start difference. First operand has 392 places, 464 transitions, 6026 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:27:38,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 481 transitions, 7074 flow [2024-06-20 15:27:43,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 481 transitions, 6839 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:43,141 INFO L231 Difference]: Finished difference. Result has 392 places, 466 transitions, 6062 flow [2024-06-20 15:27:43,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6062, PETRI_PLACES=392, PETRI_TRANSITIONS=466} [2024-06-20 15:27:43,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-20 15:27:43,142 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 466 transitions, 6062 flow [2024-06-20 15:27:43,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:43,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:43,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:27:43,143 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:43,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash 590526605, now seen corresponding path program 2 times [2024-06-20 15:27:43,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:43,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008738205] [2024-06-20 15:27:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:43,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008738205] [2024-06-20 15:27:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008738205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:43,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:43,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:43,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206324589] [2024-06-20 15:27:43,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:43,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:43,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 466 transitions, 6062 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:43,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:43,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:43,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:44,265 INFO L124 PetriNetUnfolderBase]: 3107/5315 cut-off events. [2024-06-20 15:27:44,265 INFO L125 PetriNetUnfolderBase]: For 781313/781313 co-relation queries the response was YES. [2024-06-20 15:27:44,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36948 conditions, 5315 events. 3107/5315 cut-off events. For 781313/781313 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36221 event pairs, 702 based on Foata normal form. 2/5309 useless extension candidates. Maximal degree in co-relation 36763. Up to 4546 conditions per place. [2024-06-20 15:27:44,348 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 100 changer transitions 0/484 dead transitions. [2024-06-20 15:27:44,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 484 transitions, 7122 flow [2024-06-20 15:27:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:27:44,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-20 15:27:44,349 INFO L175 Difference]: Start difference. First operand has 392 places, 466 transitions, 6062 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:27:44,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 484 transitions, 7122 flow [2024-06-20 15:27:48,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 484 transitions, 6867 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:48,945 INFO L231 Difference]: Finished difference. Result has 394 places, 468 transitions, 6086 flow [2024-06-20 15:27:48,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6086, PETRI_PLACES=394, PETRI_TRANSITIONS=468} [2024-06-20 15:27:48,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 15:27:48,946 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 468 transitions, 6086 flow [2024-06-20 15:27:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:48,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:48,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:48,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:27:48,946 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:48,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash -36367661, now seen corresponding path program 15 times [2024-06-20 15:27:48,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:48,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205067997] [2024-06-20 15:27:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:48,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205067997] [2024-06-20 15:27:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205067997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:49,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:49,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430220011] [2024-06-20 15:27:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:49,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:49,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:49,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:49,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 468 transitions, 6086 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:49,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:49,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:49,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:50,073 INFO L124 PetriNetUnfolderBase]: 3084/5299 cut-off events. [2024-06-20 15:27:50,073 INFO L125 PetriNetUnfolderBase]: For 776408/776408 co-relation queries the response was YES. [2024-06-20 15:27:50,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35489 conditions, 5299 events. 3084/5299 cut-off events. For 776408/776408 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36221 event pairs, 640 based on Foata normal form. 10/5304 useless extension candidates. Maximal degree in co-relation 35303. Up to 4423 conditions per place. [2024-06-20 15:27:50,157 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 91 changer transitions 0/504 dead transitions. [2024-06-20 15:27:50,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 504 transitions, 7190 flow [2024-06-20 15:27:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:27:50,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-20 15:27:50,158 INFO L175 Difference]: Start difference. First operand has 394 places, 468 transitions, 6086 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:27:50,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 504 transitions, 7190 flow [2024-06-20 15:27:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 504 transitions, 6905 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:53,765 INFO L231 Difference]: Finished difference. Result has 397 places, 468 transitions, 5998 flow [2024-06-20 15:27:53,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5998, PETRI_PLACES=397, PETRI_TRANSITIONS=468} [2024-06-20 15:27:53,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-20 15:27:53,765 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 468 transitions, 5998 flow [2024-06-20 15:27:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:53,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:53,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:53,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:27:53,766 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:53,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1320492997, now seen corresponding path program 16 times [2024-06-20 15:27:53,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846259222] [2024-06-20 15:27:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846259222] [2024-06-20 15:27:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846259222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897912114] [2024-06-20 15:27:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:53,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:53,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 468 transitions, 5998 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:53,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:53,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:53,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:54,890 INFO L124 PetriNetUnfolderBase]: 3061/5259 cut-off events. [2024-06-20 15:27:54,890 INFO L125 PetriNetUnfolderBase]: For 698657/698657 co-relation queries the response was YES. [2024-06-20 15:27:54,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33790 conditions, 5259 events. 3061/5259 cut-off events. For 698657/698657 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35980 event pairs, 655 based on Foata normal form. 10/5263 useless extension candidates. Maximal degree in co-relation 33603. Up to 4488 conditions per place. [2024-06-20 15:27:54,969 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 78 changer transitions 0/495 dead transitions. [2024-06-20 15:27:54,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 495 transitions, 7052 flow [2024-06-20 15:27:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:27:54,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-20 15:27:54,970 INFO L175 Difference]: Start difference. First operand has 397 places, 468 transitions, 5998 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:27:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 495 transitions, 7052 flow [2024-06-20 15:27:59,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 495 transitions, 6854 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:59,363 INFO L231 Difference]: Finished difference. Result has 397 places, 468 transitions, 5965 flow [2024-06-20 15:27:59,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5965, PETRI_PLACES=397, PETRI_TRANSITIONS=468} [2024-06-20 15:27:59,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-20 15:27:59,364 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 468 transitions, 5965 flow [2024-06-20 15:27:59,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:59,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:59,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:59,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:27:59,364 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:59,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 229656049, now seen corresponding path program 17 times [2024-06-20 15:27:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858271809] [2024-06-20 15:27:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:59,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858271809] [2024-06-20 15:27:59,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858271809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:59,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:59,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:27:59,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025911223] [2024-06-20 15:27:59,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:59,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:27:59,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:27:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:27:59,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:59,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 468 transitions, 5965 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:59,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:59,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:59,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:00,428 INFO L124 PetriNetUnfolderBase]: 3031/5226 cut-off events. [2024-06-20 15:28:00,428 INFO L125 PetriNetUnfolderBase]: For 602688/602688 co-relation queries the response was YES. [2024-06-20 15:28:00,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31979 conditions, 5226 events. 3031/5226 cut-off events. For 602688/602688 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35843 event pairs, 542 based on Foata normal form. 10/5230 useless extension candidates. Maximal degree in co-relation 31792. Up to 3973 conditions per place. [2024-06-20 15:28:00,506 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 90 changer transitions 0/501 dead transitions. [2024-06-20 15:28:00,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 501 transitions, 7067 flow [2024-06-20 15:28:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:28:00,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:28:00,507 INFO L175 Difference]: Start difference. First operand has 397 places, 468 transitions, 5965 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:28:00,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 501 transitions, 7067 flow [2024-06-20 15:28:04,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 501 transitions, 6878 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:04,220 INFO L231 Difference]: Finished difference. Result has 398 places, 468 transitions, 5967 flow [2024-06-20 15:28:04,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5967, PETRI_PLACES=398, PETRI_TRANSITIONS=468} [2024-06-20 15:28:04,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-20 15:28:04,220 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 468 transitions, 5967 flow [2024-06-20 15:28:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:04,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:28:04,221 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 391913707, now seen corresponding path program 3 times [2024-06-20 15:28:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438878029] [2024-06-20 15:28:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:04,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:04,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438878029] [2024-06-20 15:28:04,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438878029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:04,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:04,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:04,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466176480] [2024-06-20 15:28:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:04,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:04,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:04,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 468 transitions, 5967 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:04,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:04,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:05,264 INFO L124 PetriNetUnfolderBase]: 3039/5242 cut-off events. [2024-06-20 15:28:05,264 INFO L125 PetriNetUnfolderBase]: For 544082/544082 co-relation queries the response was YES. [2024-06-20 15:28:05,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32238 conditions, 5242 events. 3039/5242 cut-off events. For 544082/544082 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36008 event pairs, 652 based on Foata normal form. 2/5238 useless extension candidates. Maximal degree in co-relation 32050. Up to 4504 conditions per place. [2024-06-20 15:28:05,343 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 76 changer transitions 0/491 dead transitions. [2024-06-20 15:28:05,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 491 transitions, 7059 flow [2024-06-20 15:28:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:28:05,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:28:05,344 INFO L175 Difference]: Start difference. First operand has 398 places, 468 transitions, 5967 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:28:05,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 491 transitions, 7059 flow [2024-06-20 15:28:08,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 491 transitions, 6770 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:08,650 INFO L231 Difference]: Finished difference. Result has 397 places, 470 transitions, 5913 flow [2024-06-20 15:28:08,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5913, PETRI_PLACES=397, PETRI_TRANSITIONS=470} [2024-06-20 15:28:08,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-20 15:28:08,650 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 470 transitions, 5913 flow [2024-06-20 15:28:08,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:08,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:28:08,651 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:08,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash 407150827, now seen corresponding path program 4 times [2024-06-20 15:28:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782853489] [2024-06-20 15:28:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:08,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:08,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782853489] [2024-06-20 15:28:08,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782853489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:08,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:08,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518383526] [2024-06-20 15:28:08,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:08,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:08,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:08,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 470 transitions, 5913 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:08,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:08,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:09,740 INFO L124 PetriNetUnfolderBase]: 3093/5324 cut-off events. [2024-06-20 15:28:09,741 INFO L125 PetriNetUnfolderBase]: For 625683/625683 co-relation queries the response was YES. [2024-06-20 15:28:09,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33947 conditions, 5324 events. 3093/5324 cut-off events. For 625683/625683 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36554 event pairs, 662 based on Foata normal form. 2/5320 useless extension candidates. Maximal degree in co-relation 33758. Up to 4456 conditions per place. [2024-06-20 15:28:09,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 83 changer transitions 0/499 dead transitions. [2024-06-20 15:28:09,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 499 transitions, 7385 flow [2024-06-20 15:28:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:28:09,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:28:09,824 INFO L175 Difference]: Start difference. First operand has 397 places, 470 transitions, 5913 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:28:09,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 499 transitions, 7385 flow [2024-06-20 15:28:13,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 499 transitions, 7166 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:13,574 INFO L231 Difference]: Finished difference. Result has 399 places, 474 transitions, 6026 flow [2024-06-20 15:28:13,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6026, PETRI_PLACES=399, PETRI_TRANSITIONS=474} [2024-06-20 15:28:13,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-20 15:28:13,575 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 474 transitions, 6026 flow [2024-06-20 15:28:13,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:13,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:13,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:28:13,575 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:13,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1313440177, now seen corresponding path program 5 times [2024-06-20 15:28:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:13,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922151515] [2024-06-20 15:28:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:13,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:13,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:13,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922151515] [2024-06-20 15:28:13,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922151515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:13,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:13,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:13,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125987028] [2024-06-20 15:28:13,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:13,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:13,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:13,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:13,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 474 transitions, 6026 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:13,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:13,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:14,820 INFO L124 PetriNetUnfolderBase]: 3088/5328 cut-off events. [2024-06-20 15:28:14,820 INFO L125 PetriNetUnfolderBase]: For 617023/617023 co-relation queries the response was YES. [2024-06-20 15:28:14,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33691 conditions, 5328 events. 3088/5328 cut-off events. For 617023/617023 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36607 event pairs, 645 based on Foata normal form. 2/5325 useless extension candidates. Maximal degree in co-relation 33501. Up to 4531 conditions per place. [2024-06-20 15:28:14,894 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 412 selfloop transitions, 87 changer transitions 1/508 dead transitions. [2024-06-20 15:28:14,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 508 transitions, 7170 flow [2024-06-20 15:28:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:28:14,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-20 15:28:14,895 INFO L175 Difference]: Start difference. First operand has 399 places, 474 transitions, 6026 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:28:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 508 transitions, 7170 flow [2024-06-20 15:28:18,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 508 transitions, 6998 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:18,932 INFO L231 Difference]: Finished difference. Result has 404 places, 475 transitions, 6093 flow [2024-06-20 15:28:18,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=404, PETRI_TRANSITIONS=475} [2024-06-20 15:28:18,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-20 15:28:18,933 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 475 transitions, 6093 flow [2024-06-20 15:28:18,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:18,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:18,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:18,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:28:18,933 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:18,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1685829625, now seen corresponding path program 6 times [2024-06-20 15:28:18,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:18,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126927195] [2024-06-20 15:28:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:18,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:19,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126927195] [2024-06-20 15:28:19,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126927195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:19,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:19,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:19,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166736456] [2024-06-20 15:28:19,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:19,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:19,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:19,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:19,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 475 transitions, 6093 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:19,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:19,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:19,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:20,072 INFO L124 PetriNetUnfolderBase]: 3129/5387 cut-off events. [2024-06-20 15:28:20,072 INFO L125 PetriNetUnfolderBase]: For 680432/680432 co-relation queries the response was YES. [2024-06-20 15:28:20,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 5387 events. 3129/5387 cut-off events. For 680432/680432 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37051 event pairs, 520 based on Foata normal form. 2/5384 useless extension candidates. Maximal degree in co-relation 35006. Up to 3981 conditions per place. [2024-06-20 15:28:20,156 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 105 changer transitions 1/519 dead transitions. [2024-06-20 15:28:20,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 519 transitions, 7634 flow [2024-06-20 15:28:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-20 15:28:20,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2024-06-20 15:28:20,157 INFO L175 Difference]: Start difference. First operand has 404 places, 475 transitions, 6093 flow. Second operand 8 states and 217 transitions. [2024-06-20 15:28:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 519 transitions, 7634 flow [2024-06-20 15:28:24,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 519 transitions, 7407 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:24,379 INFO L231 Difference]: Finished difference. Result has 407 places, 479 transitions, 6254 flow [2024-06-20 15:28:24,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=407, PETRI_TRANSITIONS=479} [2024-06-20 15:28:24,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-20 15:28:24,379 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 479 transitions, 6254 flow [2024-06-20 15:28:24,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:24,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:24,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:28:24,380 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:24,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash 17018219, now seen corresponding path program 7 times [2024-06-20 15:28:24,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:24,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095249699] [2024-06-20 15:28:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:24,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:24,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095249699] [2024-06-20 15:28:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095249699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:24,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:24,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:24,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666159024] [2024-06-20 15:28:24,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:24,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:24,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:24,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:24,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 479 transitions, 6254 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:24,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:24,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:24,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:25,592 INFO L124 PetriNetUnfolderBase]: 3284/5665 cut-off events. [2024-06-20 15:28:25,592 INFO L125 PetriNetUnfolderBase]: For 972017/972017 co-relation queries the response was YES. [2024-06-20 15:28:25,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41307 conditions, 5665 events. 3284/5665 cut-off events. For 972017/972017 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39171 event pairs, 545 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 41113. Up to 3408 conditions per place. [2024-06-20 15:28:25,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 102 changer transitions 0/517 dead transitions. [2024-06-20 15:28:25,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 517 transitions, 8131 flow [2024-06-20 15:28:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 15:28:25,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-20 15:28:25,682 INFO L175 Difference]: Start difference. First operand has 407 places, 479 transitions, 6254 flow. Second operand 7 states and 188 transitions. [2024-06-20 15:28:25,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 517 transitions, 8131 flow [2024-06-20 15:28:31,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 517 transitions, 7951 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:31,457 INFO L231 Difference]: Finished difference. Result has 411 places, 485 transitions, 6564 flow [2024-06-20 15:28:31,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6564, PETRI_PLACES=411, PETRI_TRANSITIONS=485} [2024-06-20 15:28:31,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-20 15:28:31,457 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 485 transitions, 6564 flow [2024-06-20 15:28:31,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:31,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:31,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:31,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:28:31,457 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:31,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash 16838729, now seen corresponding path program 8 times [2024-06-20 15:28:31,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:31,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258642617] [2024-06-20 15:28:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:31,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:31,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258642617] [2024-06-20 15:28:31,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258642617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:31,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:31,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:31,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772723963] [2024-06-20 15:28:31,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:31,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:31,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:31,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 485 transitions, 6564 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:31,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:31,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:31,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:32,663 INFO L124 PetriNetUnfolderBase]: 3279/5658 cut-off events. [2024-06-20 15:28:32,664 INFO L125 PetriNetUnfolderBase]: For 970139/970139 co-relation queries the response was YES. [2024-06-20 15:28:32,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41793 conditions, 5658 events. 3279/5658 cut-off events. For 970139/970139 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39167 event pairs, 533 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 41596. Up to 3406 conditions per place. [2024-06-20 15:28:32,755 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 104 changer transitions 0/519 dead transitions. [2024-06-20 15:28:32,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 519 transitions, 8301 flow [2024-06-20 15:28:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:28:32,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:28:32,756 INFO L175 Difference]: Start difference. First operand has 411 places, 485 transitions, 6564 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:28:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 519 transitions, 8301 flow [2024-06-20 15:28:38,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 519 transitions, 8127 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:38,727 INFO L231 Difference]: Finished difference. Result has 416 places, 486 transitions, 6662 flow [2024-06-20 15:28:38,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6662, PETRI_PLACES=416, PETRI_TRANSITIONS=486} [2024-06-20 15:28:38,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-20 15:28:38,728 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 486 transitions, 6662 flow [2024-06-20 15:28:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:38,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:38,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:28:38,728 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash -163897715, now seen corresponding path program 1 times [2024-06-20 15:28:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546707308] [2024-06-20 15:28:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:38,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:38,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546707308] [2024-06-20 15:28:38,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546707308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:38,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:38,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437157531] [2024-06-20 15:28:38,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:38,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:38,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:38,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 486 transitions, 6662 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:38,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:38,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:40,011 INFO L124 PetriNetUnfolderBase]: 3359/5772 cut-off events. [2024-06-20 15:28:40,011 INFO L125 PetriNetUnfolderBase]: For 1099344/1099344 co-relation queries the response was YES. [2024-06-20 15:28:40,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44964 conditions, 5772 events. 3359/5772 cut-off events. For 1099344/1099344 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39940 event pairs, 610 based on Foata normal form. 2/5758 useless extension candidates. Maximal degree in co-relation 44765. Up to 4524 conditions per place. [2024-06-20 15:28:40,109 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 49 changer transitions 4/538 dead transitions. [2024-06-20 15:28:40,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 538 transitions, 8654 flow [2024-06-20 15:28:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-20 15:28:40,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:28:40,113 INFO L175 Difference]: Start difference. First operand has 416 places, 486 transitions, 6662 flow. Second operand 9 states and 231 transitions. [2024-06-20 15:28:40,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 538 transitions, 8654 flow [2024-06-20 15:28:45,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 538 transitions, 8280 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:45,381 INFO L231 Difference]: Finished difference. Result has 420 places, 491 transitions, 6590 flow [2024-06-20 15:28:45,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6590, PETRI_PLACES=420, PETRI_TRANSITIONS=491} [2024-06-20 15:28:45,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-20 15:28:45,382 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 491 transitions, 6590 flow [2024-06-20 15:28:45,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:45,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:45,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:28:45,383 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:45,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2056444241, now seen corresponding path program 2 times [2024-06-20 15:28:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:45,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111522128] [2024-06-20 15:28:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:45,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111522128] [2024-06-20 15:28:45,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111522128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:45,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:45,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542927493] [2024-06-20 15:28:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:45,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:45,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:45,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 491 transitions, 6590 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:45,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:46,824 INFO L124 PetriNetUnfolderBase]: 3387/5821 cut-off events. [2024-06-20 15:28:46,824 INFO L125 PetriNetUnfolderBase]: For 1146462/1146462 co-relation queries the response was YES. [2024-06-20 15:28:46,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45078 conditions, 5821 events. 3387/5821 cut-off events. For 1146462/1146462 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40363 event pairs, 638 based on Foata normal form. 2/5820 useless extension candidates. Maximal degree in co-relation 44879. Up to 5107 conditions per place. [2024-06-20 15:28:46,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 489 selfloop transitions, 30 changer transitions 2/529 dead transitions. [2024-06-20 15:28:46,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 529 transitions, 8038 flow [2024-06-20 15:28:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 15:28:46,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:28:46,914 INFO L175 Difference]: Start difference. First operand has 420 places, 491 transitions, 6590 flow. Second operand 9 states and 216 transitions. [2024-06-20 15:28:46,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 529 transitions, 8038 flow [2024-06-20 15:28:53,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 529 transitions, 7848 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:53,899 INFO L231 Difference]: Finished difference. Result has 427 places, 492 transitions, 6497 flow [2024-06-20 15:28:53,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6497, PETRI_PLACES=427, PETRI_TRANSITIONS=492} [2024-06-20 15:28:53,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 15:28:53,899 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 492 transitions, 6497 flow [2024-06-20 15:28:53,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:53,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:53,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:28:53,900 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:53,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:53,900 INFO L85 PathProgramCache]: Analyzing trace with hash 501301585, now seen corresponding path program 3 times [2024-06-20 15:28:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:53,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870640315] [2024-06-20 15:28:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870640315] [2024-06-20 15:28:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870640315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807072233] [2024-06-20 15:28:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:54,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:54,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:54,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:54,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 492 transitions, 6497 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:54,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:54,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:54,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:55,190 INFO L124 PetriNetUnfolderBase]: 3395/5839 cut-off events. [2024-06-20 15:28:55,190 INFO L125 PetriNetUnfolderBase]: For 1165733/1165733 co-relation queries the response was YES. [2024-06-20 15:28:55,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45056 conditions, 5839 events. 3395/5839 cut-off events. For 1165733/1165733 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40496 event pairs, 810 based on Foata normal form. 2/5836 useless extension candidates. Maximal degree in co-relation 44854. Up to 5131 conditions per place. [2024-06-20 15:28:55,488 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 481 selfloop transitions, 44 changer transitions 2/535 dead transitions. [2024-06-20 15:28:55,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 535 transitions, 8095 flow [2024-06-20 15:28:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 15:28:55,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-20 15:28:55,489 INFO L175 Difference]: Start difference. First operand has 427 places, 492 transitions, 6497 flow. Second operand 9 states and 223 transitions. [2024-06-20 15:28:55,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 535 transitions, 8095 flow [2024-06-20 15:29:01,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 535 transitions, 7974 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:29:01,584 INFO L231 Difference]: Finished difference. Result has 427 places, 496 transitions, 6633 flow [2024-06-20 15:29:01,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6633, PETRI_PLACES=427, PETRI_TRANSITIONS=496} [2024-06-20 15:29:01,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 15:29:01,584 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 496 transitions, 6633 flow [2024-06-20 15:29:01,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:01,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:01,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:01,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:29:01,585 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:01,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash -130475539, now seen corresponding path program 4 times [2024-06-20 15:29:01,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:01,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931943336] [2024-06-20 15:29:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:01,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:01,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:01,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931943336] [2024-06-20 15:29:01,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931943336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:01,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:01,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573474687] [2024-06-20 15:29:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:01,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:01,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:01,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 496 transitions, 6633 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:01,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:01,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:01,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:02,899 INFO L124 PetriNetUnfolderBase]: 3390/5834 cut-off events. [2024-06-20 15:29:02,899 INFO L125 PetriNetUnfolderBase]: For 1162179/1162179 co-relation queries the response was YES. [2024-06-20 15:29:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44668 conditions, 5834 events. 3390/5834 cut-off events. For 1162179/1162179 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40390 event pairs, 813 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 44465. Up to 5183 conditions per place. [2024-06-20 15:29:02,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 480 selfloop transitions, 40 changer transitions 0/528 dead transitions. [2024-06-20 15:29:02,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 528 transitions, 7753 flow [2024-06-20 15:29:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:29:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:29:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:29:02,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:29:02,995 INFO L175 Difference]: Start difference. First operand has 427 places, 496 transitions, 6633 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:29:02,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 528 transitions, 7753 flow [2024-06-20 15:29:10,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 528 transitions, 7568 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:10,613 INFO L231 Difference]: Finished difference. Result has 431 places, 496 transitions, 6533 flow [2024-06-20 15:29:10,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6533, PETRI_PLACES=431, PETRI_TRANSITIONS=496} [2024-06-20 15:29:10,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-20 15:29:10,613 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 496 transitions, 6533 flow [2024-06-20 15:29:10,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:10,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:10,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:29:10,614 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:10,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash -134189494, now seen corresponding path program 1 times [2024-06-20 15:29:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:10,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332781411] [2024-06-20 15:29:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:10,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332781411] [2024-06-20 15:29:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332781411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:10,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302944060] [2024-06-20 15:29:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:10,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:10,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 496 transitions, 6533 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:29:10,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:10,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:10,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:11,883 INFO L124 PetriNetUnfolderBase]: 3387/5821 cut-off events. [2024-06-20 15:29:11,883 INFO L125 PetriNetUnfolderBase]: For 1155405/1155405 co-relation queries the response was YES. [2024-06-20 15:29:12,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44436 conditions, 5821 events. 3387/5821 cut-off events. For 1155405/1155405 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 40332 event pairs, 832 based on Foata normal form. 1/5816 useless extension candidates. Maximal degree in co-relation 44231. Up to 4943 conditions per place. [2024-06-20 15:29:12,192 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 125 changer transitions 0/514 dead transitions. [2024-06-20 15:29:12,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 514 transitions, 7871 flow [2024-06-20 15:29:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:29:12,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:29:12,209 INFO L175 Difference]: Start difference. First operand has 431 places, 496 transitions, 6533 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:29:12,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 514 transitions, 7871 flow [2024-06-20 15:29:20,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 514 transitions, 7771 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:29:20,898 INFO L231 Difference]: Finished difference. Result has 430 places, 496 transitions, 6697 flow [2024-06-20 15:29:20,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6697, PETRI_PLACES=430, PETRI_TRANSITIONS=496} [2024-06-20 15:29:20,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-20 15:29:20,899 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 496 transitions, 6697 flow [2024-06-20 15:29:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:29:20,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:20,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:20,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:29:20,899 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:20,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash 819146104, now seen corresponding path program 2 times [2024-06-20 15:29:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:20,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138591348] [2024-06-20 15:29:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:20,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:20,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138591348] [2024-06-20 15:29:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138591348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:20,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758678669] [2024-06-20 15:29:20,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:20,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 496 transitions, 6697 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:22,550 INFO L124 PetriNetUnfolderBase]: 3392/5830 cut-off events. [2024-06-20 15:29:22,550 INFO L125 PetriNetUnfolderBase]: For 1172129/1172129 co-relation queries the response was YES. [2024-06-20 15:29:22,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44799 conditions, 5830 events. 3392/5830 cut-off events. For 1172129/1172129 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40435 event pairs, 832 based on Foata normal form. 1/5825 useless extension candidates. Maximal degree in co-relation 44593. Up to 4949 conditions per place. [2024-06-20 15:29:22,720 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2024-06-20 15:29:22,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 520 transitions, 8100 flow [2024-06-20 15:29:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:29:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:29:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-20 15:29:22,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-20 15:29:22,721 INFO L175 Difference]: Start difference. First operand has 430 places, 496 transitions, 6697 flow. Second operand 10 states and 242 transitions. [2024-06-20 15:29:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 520 transitions, 8100 flow [2024-06-20 15:29:29,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 520 transitions, 7830 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:29,406 INFO L231 Difference]: Finished difference. Result has 434 places, 499 transitions, 6757 flow [2024-06-20 15:29:29,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6757, PETRI_PLACES=434, PETRI_TRANSITIONS=499} [2024-06-20 15:29:29,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-20 15:29:29,407 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 499 transitions, 6757 flow [2024-06-20 15:29:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:29,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:29,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:29,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:29:29,407 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:29,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash 819140524, now seen corresponding path program 3 times [2024-06-20 15:29:29,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:29,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512629888] [2024-06-20 15:29:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:29,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512629888] [2024-06-20 15:29:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512629888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:29,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749367640] [2024-06-20 15:29:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:29,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:29,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 499 transitions, 6757 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:29,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:29,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:29,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:31,114 INFO L124 PetriNetUnfolderBase]: 3389/5826 cut-off events. [2024-06-20 15:29:31,115 INFO L125 PetriNetUnfolderBase]: For 1161824/1161824 co-relation queries the response was YES. [2024-06-20 15:29:31,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44664 conditions, 5826 events. 3389/5826 cut-off events. For 1161824/1161824 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40444 event pairs, 832 based on Foata normal form. 1/5821 useless extension candidates. Maximal degree in co-relation 44458. Up to 4946 conditions per place. [2024-06-20 15:29:31,196 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 129 changer transitions 0/517 dead transitions. [2024-06-20 15:29:31,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 517 transitions, 7819 flow [2024-06-20 15:29:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:29:31,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:29:31,197 INFO L175 Difference]: Start difference. First operand has 434 places, 499 transitions, 6757 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:29:31,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 517 transitions, 7819 flow [2024-06-20 15:29:37,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 517 transitions, 7486 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:29:37,510 INFO L231 Difference]: Finished difference. Result has 432 places, 499 transitions, 6697 flow [2024-06-20 15:29:37,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6697, PETRI_PLACES=432, PETRI_TRANSITIONS=499} [2024-06-20 15:29:37,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 15:29:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 499 transitions, 6697 flow [2024-06-20 15:29:37,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:37,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:37,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:37,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:29:37,511 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:37,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash -703518179, now seen corresponding path program 5 times [2024-06-20 15:29:37,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:37,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461483210] [2024-06-20 15:29:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:37,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:37,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461483210] [2024-06-20 15:29:37,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461483210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:37,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:37,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080830801] [2024-06-20 15:29:37,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:37,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:37,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:37,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 499 transitions, 6697 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:37,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:37,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:37,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:39,193 INFO L124 PetriNetUnfolderBase]: 3456/5919 cut-off events. [2024-06-20 15:29:39,193 INFO L125 PetriNetUnfolderBase]: For 1285070/1285070 co-relation queries the response was YES. [2024-06-20 15:29:39,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47390 conditions, 5919 events. 3456/5919 cut-off events. For 1285070/1285070 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40896 event pairs, 862 based on Foata normal form. 2/5903 useless extension candidates. Maximal degree in co-relation 47184. Up to 4679 conditions per place. [2024-06-20 15:29:39,279 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 254 changer transitions 0/537 dead transitions. [2024-06-20 15:29:39,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 537 transitions, 8597 flow [2024-06-20 15:29:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:29:39,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-20 15:29:39,280 INFO L175 Difference]: Start difference. First operand has 432 places, 499 transitions, 6697 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:29:39,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 537 transitions, 8597 flow [2024-06-20 15:29:46,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 537 transitions, 8324 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:29:46,267 INFO L231 Difference]: Finished difference. Result has 432 places, 503 transitions, 7117 flow [2024-06-20 15:29:46,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7117, PETRI_PLACES=432, PETRI_TRANSITIONS=503} [2024-06-20 15:29:46,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 15:29:46,268 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 503 transitions, 7117 flow [2024-06-20 15:29:46,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:46,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:46,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:46,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:29:46,268 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:46,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -99045039, now seen corresponding path program 6 times [2024-06-20 15:29:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:46,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238256182] [2024-06-20 15:29:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:46,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:46,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:46,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238256182] [2024-06-20 15:29:46,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238256182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:46,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:46,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371995856] [2024-06-20 15:29:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:46,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:46,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 503 transitions, 7117 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:46,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:46,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:46,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:47,864 INFO L124 PetriNetUnfolderBase]: 3464/5936 cut-off events. [2024-06-20 15:29:47,864 INFO L125 PetriNetUnfolderBase]: For 1287755/1287755 co-relation queries the response was YES. [2024-06-20 15:29:47,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47993 conditions, 5936 events. 3464/5936 cut-off events. For 1287755/1287755 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41049 event pairs, 869 based on Foata normal form. 2/5920 useless extension candidates. Maximal degree in co-relation 47787. Up to 4776 conditions per place. [2024-06-20 15:29:47,964 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 251 changer transitions 0/531 dead transitions. [2024-06-20 15:29:47,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 531 transitions, 8601 flow [2024-06-20 15:29:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:29:47,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:29:47,965 INFO L175 Difference]: Start difference. First operand has 432 places, 503 transitions, 7117 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:29:47,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 531 transitions, 8601 flow [2024-06-20 15:29:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 531 transitions, 7949 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:56,318 INFO L231 Difference]: Finished difference. Result has 434 places, 505 transitions, 7066 flow [2024-06-20 15:29:56,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7066, PETRI_PLACES=434, PETRI_TRANSITIONS=505} [2024-06-20 15:29:56,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-20 15:29:56,319 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 505 transitions, 7066 flow [2024-06-20 15:29:56,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:56,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:56,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:56,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:29:56,320 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:56,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1393755535, now seen corresponding path program 7 times [2024-06-20 15:29:56,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:56,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6919585] [2024-06-20 15:29:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:56,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6919585] [2024-06-20 15:29:56,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6919585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:56,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002966712] [2024-06-20 15:29:56,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:56,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:56,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:56,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:56,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:56,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 505 transitions, 7066 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:56,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:56,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:56,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:58,035 INFO L124 PetriNetUnfolderBase]: 3472/5948 cut-off events. [2024-06-20 15:29:58,035 INFO L125 PetriNetUnfolderBase]: For 1299633/1299633 co-relation queries the response was YES. [2024-06-20 15:29:58,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47775 conditions, 5948 events. 3472/5948 cut-off events. For 1299633/1299633 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 41171 event pairs, 869 based on Foata normal form. 2/5932 useless extension candidates. Maximal degree in co-relation 47569. Up to 4788 conditions per place. [2024-06-20 15:29:58,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 250 changer transitions 0/530 dead transitions. [2024-06-20 15:29:58,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 530 transitions, 8522 flow [2024-06-20 15:29:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:29:58,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:29:58,124 INFO L175 Difference]: Start difference. First operand has 434 places, 505 transitions, 7066 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:29:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 530 transitions, 8522 flow [2024-06-20 15:30:05,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 530 transitions, 7965 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:05,528 INFO L231 Difference]: Finished difference. Result has 436 places, 507 transitions, 7088 flow [2024-06-20 15:30:05,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7088, PETRI_PLACES=436, PETRI_TRANSITIONS=507} [2024-06-20 15:30:05,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-20 15:30:05,529 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 507 transitions, 7088 flow [2024-06-20 15:30:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:05,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:05,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:05,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:30:05,530 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:05,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1652876651, now seen corresponding path program 8 times [2024-06-20 15:30:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503713727] [2024-06-20 15:30:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:05,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:05,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:05,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503713727] [2024-06-20 15:30:05,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503713727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:05,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:05,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:05,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57758014] [2024-06-20 15:30:05,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:05,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:05,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 507 transitions, 7088 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:05,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:05,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:05,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:07,257 INFO L124 PetriNetUnfolderBase]: 3480/5972 cut-off events. [2024-06-20 15:30:07,257 INFO L125 PetriNetUnfolderBase]: For 1317222/1317222 co-relation queries the response was YES. [2024-06-20 15:30:07,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47994 conditions, 5972 events. 3480/5972 cut-off events. For 1317222/1317222 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 41403 event pairs, 827 based on Foata normal form. 2/5971 useless extension candidates. Maximal degree in co-relation 47787. Up to 5337 conditions per place. [2024-06-20 15:30:07,351 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 483 selfloop transitions, 39 changer transitions 0/530 dead transitions. [2024-06-20 15:30:07,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 530 transitions, 8266 flow [2024-06-20 15:30:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:30:07,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-20 15:30:07,352 INFO L175 Difference]: Start difference. First operand has 436 places, 507 transitions, 7088 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:30:07,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 530 transitions, 8266 flow [2024-06-20 15:30:14,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 530 transitions, 7707 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:14,670 INFO L231 Difference]: Finished difference. Result has 439 places, 509 transitions, 6690 flow [2024-06-20 15:30:14,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6690, PETRI_PLACES=439, PETRI_TRANSITIONS=509} [2024-06-20 15:30:14,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-20 15:30:14,670 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 509 transitions, 6690 flow [2024-06-20 15:30:14,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:14,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:14,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:14,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:30:14,671 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:14,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash -102758994, now seen corresponding path program 4 times [2024-06-20 15:30:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:14,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098614656] [2024-06-20 15:30:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:14,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098614656] [2024-06-20 15:30:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098614656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:14,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:14,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710697449] [2024-06-20 15:30:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:14,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:14,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 509 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:14,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:14,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:14,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:16,336 INFO L124 PetriNetUnfolderBase]: 3501/5980 cut-off events. [2024-06-20 15:30:16,336 INFO L125 PetriNetUnfolderBase]: For 1344244/1344244 co-relation queries the response was YES. [2024-06-20 15:30:16,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47887 conditions, 5980 events. 3501/5980 cut-off events. For 1344244/1344244 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 41414 event pairs, 924 based on Foata normal form. 1/5969 useless extension candidates. Maximal degree in co-relation 47679. Up to 4830 conditions per place. [2024-06-20 15:30:16,425 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 224 changer transitions 0/541 dead transitions. [2024-06-20 15:30:16,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 541 transitions, 8513 flow [2024-06-20 15:30:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:30:16,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:30:16,426 INFO L175 Difference]: Start difference. First operand has 439 places, 509 transitions, 6690 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:30:16,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 541 transitions, 8513 flow [2024-06-20 15:30:24,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 541 transitions, 8372 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 15:30:24,435 INFO L231 Difference]: Finished difference. Result has 440 places, 518 transitions, 7125 flow [2024-06-20 15:30:24,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7125, PETRI_PLACES=440, PETRI_TRANSITIONS=518} [2024-06-20 15:30:24,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 15:30:24,435 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 518 transitions, 7125 flow [2024-06-20 15:30:24,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:24,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:24,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:30:24,436 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:24,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash -694936604, now seen corresponding path program 5 times [2024-06-20 15:30:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:24,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473253822] [2024-06-20 15:30:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:24,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:24,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473253822] [2024-06-20 15:30:24,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473253822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:24,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:24,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:24,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571060240] [2024-06-20 15:30:24,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:24,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:24,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:24,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:24,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:24,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 518 transitions, 7125 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:24,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:24,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:24,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:26,141 INFO L124 PetriNetUnfolderBase]: 3514/5991 cut-off events. [2024-06-20 15:30:26,141 INFO L125 PetriNetUnfolderBase]: For 1374796/1374796 co-relation queries the response was YES. [2024-06-20 15:30:26,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48682 conditions, 5991 events. 3514/5991 cut-off events. For 1374796/1374796 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 41418 event pairs, 946 based on Foata normal form. 1/5976 useless extension candidates. Maximal degree in co-relation 48473. Up to 4845 conditions per place. [2024-06-20 15:30:26,244 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 232 changer transitions 0/546 dead transitions. [2024-06-20 15:30:26,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 546 transitions, 8927 flow [2024-06-20 15:30:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:30:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:30:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:30:26,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:30:26,245 INFO L175 Difference]: Start difference. First operand has 440 places, 518 transitions, 7125 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:30:26,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 546 transitions, 8927 flow [2024-06-20 15:30:34,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 546 transitions, 8587 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:30:34,042 INFO L231 Difference]: Finished difference. Result has 446 places, 524 transitions, 7345 flow [2024-06-20 15:30:34,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6815, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7345, PETRI_PLACES=446, PETRI_TRANSITIONS=524} [2024-06-20 15:30:34,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 15:30:34,043 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 524 transitions, 7345 flow [2024-06-20 15:30:34,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:34,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:34,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:34,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:30:34,043 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:34,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 376625486, now seen corresponding path program 6 times [2024-06-20 15:30:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:34,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359002312] [2024-06-20 15:30:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359002312] [2024-06-20 15:30:34,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359002312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:34,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:34,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:34,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781669010] [2024-06-20 15:30:34,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:34,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:34,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 524 transitions, 7345 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:30:34,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:34,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:34,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:35,707 INFO L124 PetriNetUnfolderBase]: 3519/6030 cut-off events. [2024-06-20 15:30:35,707 INFO L125 PetriNetUnfolderBase]: For 1394989/1394995 co-relation queries the response was YES. [2024-06-20 15:30:35,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48923 conditions, 6030 events. 3519/6030 cut-off events. For 1394989/1394995 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 42028 event pairs, 910 based on Foata normal form. 5/6024 useless extension candidates. Maximal degree in co-relation 48712. Up to 4851 conditions per place. [2024-06-20 15:30:35,797 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 308 selfloop transitions, 230 changer transitions 0/546 dead transitions. [2024-06-20 15:30:35,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 546 transitions, 9103 flow [2024-06-20 15:30:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:30:35,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:30:35,798 INFO L175 Difference]: Start difference. First operand has 446 places, 524 transitions, 7345 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:30:35,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 546 transitions, 9103 flow [2024-06-20 15:30:42,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 546 transitions, 8810 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:42,697 INFO L231 Difference]: Finished difference. Result has 447 places, 527 transitions, 7567 flow [2024-06-20 15:30:42,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7567, PETRI_PLACES=447, PETRI_TRANSITIONS=527} [2024-06-20 15:30:42,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-20 15:30:42,697 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 527 transitions, 7567 flow [2024-06-20 15:30:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:30:42,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:42,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:30:42,698 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:42,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -62411122, now seen corresponding path program 7 times [2024-06-20 15:30:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057604174] [2024-06-20 15:30:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:42,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057604174] [2024-06-20 15:30:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057604174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:42,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:42,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628814945] [2024-06-20 15:30:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:42,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:42,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:42,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:42,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 527 transitions, 7567 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:30:42,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:42,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:42,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:44,334 INFO L124 PetriNetUnfolderBase]: 3524/6039 cut-off events. [2024-06-20 15:30:44,334 INFO L125 PetriNetUnfolderBase]: For 1416411/1416417 co-relation queries the response was YES. [2024-06-20 15:30:44,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49180 conditions, 6039 events. 3524/6039 cut-off events. For 1416411/1416417 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42064 event pairs, 910 based on Foata normal form. 5/6033 useless extension candidates. Maximal degree in co-relation 48967. Up to 4857 conditions per place. [2024-06-20 15:30:44,427 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 311 selfloop transitions, 227 changer transitions 0/546 dead transitions. [2024-06-20 15:30:44,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 546 transitions, 9324 flow [2024-06-20 15:30:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:30:44,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:30:44,428 INFO L175 Difference]: Start difference. First operand has 447 places, 527 transitions, 7567 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:30:44,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 546 transitions, 9324 flow [2024-06-20 15:30:53,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 546 transitions, 8614 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 15:30:53,707 INFO L231 Difference]: Finished difference. Result has 446 places, 530 transitions, 7370 flow [2024-06-20 15:30:53,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6875, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7370, PETRI_PLACES=446, PETRI_TRANSITIONS=530} [2024-06-20 15:30:53,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 15:30:53,708 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 530 transitions, 7370 flow [2024-06-20 15:30:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:30:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:53,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:53,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:30:53,709 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:53,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2028145930, now seen corresponding path program 8 times [2024-06-20 15:30:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:53,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473643011] [2024-06-20 15:30:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:53,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473643011] [2024-06-20 15:30:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473643011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:53,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:53,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590113706] [2024-06-20 15:30:53,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:53,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:53,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:53,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:53,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 530 transitions, 7370 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:53,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:53,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:53,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:55,298 INFO L124 PetriNetUnfolderBase]: 3521/6005 cut-off events. [2024-06-20 15:30:55,298 INFO L125 PetriNetUnfolderBase]: For 1421884/1421884 co-relation queries the response was YES. [2024-06-20 15:30:55,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48706 conditions, 6005 events. 3521/6005 cut-off events. For 1421884/1421884 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41641 event pairs, 948 based on Foata normal form. 1/5990 useless extension candidates. Maximal degree in co-relation 48496. Up to 4854 conditions per place. [2024-06-20 15:30:55,389 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 236 changer transitions 0/549 dead transitions. [2024-06-20 15:30:55,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 549 transitions, 8796 flow [2024-06-20 15:30:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:30:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:30:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:30:55,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:30:55,390 INFO L175 Difference]: Start difference. First operand has 446 places, 530 transitions, 7370 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:30:55,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 549 transitions, 8796 flow [2024-06-20 15:31:03,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 549 transitions, 8365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:31:03,666 INFO L231 Difference]: Finished difference. Result has 450 places, 530 transitions, 7418 flow [2024-06-20 15:31:03,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6939, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7418, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2024-06-20 15:31:03,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 15:31:03,667 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7418 flow [2024-06-20 15:31:03,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:03,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:03,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:03,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:31:03,667 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:03,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1636215848, now seen corresponding path program 9 times [2024-06-20 15:31:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:03,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108358264] [2024-06-20 15:31:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:03,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:03,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108358264] [2024-06-20 15:31:03,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108358264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:03,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:03,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225312298] [2024-06-20 15:31:03,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:03,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:03,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:03,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:03,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7418 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:31:03,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:03,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:03,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:05,201 INFO L124 PetriNetUnfolderBase]: 3518/6031 cut-off events. [2024-06-20 15:31:05,201 INFO L125 PetriNetUnfolderBase]: For 1427801/1427807 co-relation queries the response was YES. [2024-06-20 15:31:05,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48756 conditions, 6031 events. 3518/6031 cut-off events. For 1427801/1427807 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41978 event pairs, 910 based on Foata normal form. 5/6025 useless extension candidates. Maximal degree in co-relation 48545. Up to 4851 conditions per place. [2024-06-20 15:31:05,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 234 changer transitions 0/545 dead transitions. [2024-06-20 15:31:05,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 545 transitions, 8828 flow [2024-06-20 15:31:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:31:05,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:31:05,292 INFO L175 Difference]: Start difference. First operand has 450 places, 530 transitions, 7418 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:31:05,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 545 transitions, 8828 flow [2024-06-20 15:31:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 545 transitions, 8356 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:31:13,236 INFO L231 Difference]: Finished difference. Result has 450 places, 530 transitions, 7420 flow [2024-06-20 15:31:13,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7420, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2024-06-20 15:31:13,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 15:31:13,236 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7420 flow [2024-06-20 15:31:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:31:13,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:13,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:31:13,237 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:13,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash 852732280, now seen corresponding path program 10 times [2024-06-20 15:31:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:13,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263127624] [2024-06-20 15:31:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:13,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:13,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263127624] [2024-06-20 15:31:13,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263127624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:13,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:13,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552743076] [2024-06-20 15:31:13,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:13,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:13,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:13,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:13,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7420 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:13,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:13,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:13,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:14,856 INFO L124 PetriNetUnfolderBase]: 3531/6035 cut-off events. [2024-06-20 15:31:14,856 INFO L125 PetriNetUnfolderBase]: For 1458287/1458287 co-relation queries the response was YES. [2024-06-20 15:31:14,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49070 conditions, 6035 events. 3531/6035 cut-off events. For 1458287/1458287 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41906 event pairs, 922 based on Foata normal form. 1/6020 useless extension candidates. Maximal degree in co-relation 48858. Up to 4866 conditions per place. [2024-06-20 15:31:14,945 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 262 changer transitions 0/556 dead transitions. [2024-06-20 15:31:14,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 556 transitions, 9546 flow [2024-06-20 15:31:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:31:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:31:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-20 15:31:14,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-20 15:31:14,946 INFO L175 Difference]: Start difference. First operand has 450 places, 530 transitions, 7420 flow. Second operand 10 states and 238 transitions. [2024-06-20 15:31:14,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 556 transitions, 9546 flow [2024-06-20 15:31:23,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 556 transitions, 8837 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:31:23,782 INFO L231 Difference]: Finished difference. Result has 452 places, 536 transitions, 7319 flow [2024-06-20 15:31:23,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6729, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7319, PETRI_PLACES=452, PETRI_TRANSITIONS=536} [2024-06-20 15:31:23,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 15:31:23,782 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 536 transitions, 7319 flow [2024-06-20 15:31:23,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:23,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:23,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:23,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:31:23,783 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:23,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:23,783 INFO L85 PathProgramCache]: Analyzing trace with hash 969497068, now seen corresponding path program 11 times [2024-06-20 15:31:23,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:23,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381882017] [2024-06-20 15:31:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:23,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:23,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381882017] [2024-06-20 15:31:23,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381882017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:23,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:23,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215955450] [2024-06-20 15:31:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:23,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 536 transitions, 7319 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:23,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:23,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:23,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:25,339 INFO L124 PetriNetUnfolderBase]: 3536/6026 cut-off events. [2024-06-20 15:31:25,339 INFO L125 PetriNetUnfolderBase]: For 1474398/1474398 co-relation queries the response was YES. [2024-06-20 15:31:25,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49125 conditions, 6026 events. 3536/6026 cut-off events. For 1474398/1474398 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41736 event pairs, 940 based on Foata normal form. 1/6011 useless extension candidates. Maximal degree in co-relation 48912. Up to 4872 conditions per place. [2024-06-20 15:31:25,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 246 changer transitions 0/559 dead transitions. [2024-06-20 15:31:25,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 559 transitions, 9415 flow [2024-06-20 15:31:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:31:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:31:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:31:25,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:31:25,438 INFO L175 Difference]: Start difference. First operand has 452 places, 536 transitions, 7319 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:31:25,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 559 transitions, 9415 flow [2024-06-20 15:31:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 8355 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 15:31:33,670 INFO L231 Difference]: Finished difference. Result has 452 places, 539 transitions, 6793 flow [2024-06-20 15:31:33,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6793, PETRI_PLACES=452, PETRI_TRANSITIONS=539} [2024-06-20 15:31:33,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 15:31:33,670 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 539 transitions, 6793 flow [2024-06-20 15:31:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:33,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:31:33,671 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:33,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash 969491488, now seen corresponding path program 12 times [2024-06-20 15:31:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792498945] [2024-06-20 15:31:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:33,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792498945] [2024-06-20 15:31:33,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792498945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:33,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:33,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:33,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265278885] [2024-06-20 15:31:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:33,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:33,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 539 transitions, 6793 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:33,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:33,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:33,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:35,362 INFO L124 PetriNetUnfolderBase]: 3533/6030 cut-off events. [2024-06-20 15:31:35,362 INFO L125 PetriNetUnfolderBase]: For 1473467/1473467 co-relation queries the response was YES. [2024-06-20 15:31:35,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48757 conditions, 6030 events. 3533/6030 cut-off events. For 1473467/1473467 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41778 event pairs, 948 based on Foata normal form. 1/6015 useless extension candidates. Maximal degree in co-relation 48546. Up to 4869 conditions per place. [2024-06-20 15:31:35,457 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 243 changer transitions 0/556 dead transitions. [2024-06-20 15:31:35,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 556 transitions, 8541 flow [2024-06-20 15:31:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:31:35,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:31:35,458 INFO L175 Difference]: Start difference. First operand has 452 places, 539 transitions, 6793 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:31:35,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 556 transitions, 8541 flow [2024-06-20 15:31:43,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 556 transitions, 7888 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:31:43,601 INFO L231 Difference]: Finished difference. Result has 451 places, 539 transitions, 6634 flow [2024-06-20 15:31:43,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6634, PETRI_PLACES=451, PETRI_TRANSITIONS=539} [2024-06-20 15:31:43,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 15:31:43,601 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 539 transitions, 6634 flow [2024-06-20 15:31:43,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:43,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:43,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:43,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:31:43,602 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:43,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 794067974, now seen corresponding path program 13 times [2024-06-20 15:31:43,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:43,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199320089] [2024-06-20 15:31:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199320089] [2024-06-20 15:31:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199320089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:43,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:43,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732636397] [2024-06-20 15:31:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:43,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:43,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:43,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 539 transitions, 6634 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:43,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:43,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:43,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:45,282 INFO L124 PetriNetUnfolderBase]: 3530/6021 cut-off events. [2024-06-20 15:31:45,282 INFO L125 PetriNetUnfolderBase]: For 1477839/1477839 co-relation queries the response was YES. [2024-06-20 15:31:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48619 conditions, 6021 events. 3530/6021 cut-off events. For 1477839/1477839 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41713 event pairs, 954 based on Foata normal form. 1/6006 useless extension candidates. Maximal degree in co-relation 48408. Up to 4866 conditions per place. [2024-06-20 15:31:45,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 248 changer transitions 0/555 dead transitions. [2024-06-20 15:31:45,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 555 transitions, 8074 flow [2024-06-20 15:31:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:31:45,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:31:45,375 INFO L175 Difference]: Start difference. First operand has 451 places, 539 transitions, 6634 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:31:45,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 555 transitions, 8074 flow [2024-06-20 15:31:53,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 555 transitions, 7588 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:31:53,403 INFO L231 Difference]: Finished difference. Result has 452 places, 539 transitions, 6650 flow [2024-06-20 15:31:53,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6148, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=452, PETRI_TRANSITIONS=539} [2024-06-20 15:31:53,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 15:31:53,403 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 539 transitions, 6650 flow [2024-06-20 15:31:53,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:53,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:53,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:53,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:31:53,403 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:53,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -819229358, now seen corresponding path program 14 times [2024-06-20 15:31:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938337854] [2024-06-20 15:31:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:53,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938337854] [2024-06-20 15:31:53,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938337854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:53,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:53,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:53,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842902425] [2024-06-20 15:31:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:53,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:53,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:53,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:53,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 539 transitions, 6650 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:53,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:53,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:55,144 INFO L124 PetriNetUnfolderBase]: 3535/6045 cut-off events. [2024-06-20 15:31:55,144 INFO L125 PetriNetUnfolderBase]: For 1496063/1496063 co-relation queries the response was YES. [2024-06-20 15:31:55,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48802 conditions, 6045 events. 3535/6045 cut-off events. For 1496063/1496063 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42058 event pairs, 922 based on Foata normal form. 1/6030 useless extension candidates. Maximal degree in co-relation 48590. Up to 4872 conditions per place. [2024-06-20 15:31:55,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 249 changer transitions 0/559 dead transitions. [2024-06-20 15:31:55,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 559 transitions, 8436 flow [2024-06-20 15:31:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:31:55,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:31:55,237 INFO L175 Difference]: Start difference. First operand has 452 places, 539 transitions, 6650 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:31:55,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 559 transitions, 8436 flow [2024-06-20 15:32:03,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 7900 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:32:03,701 INFO L231 Difference]: Finished difference. Result has 452 places, 542 transitions, 6645 flow [2024-06-20 15:32:03,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6645, PETRI_PLACES=452, PETRI_TRANSITIONS=542} [2024-06-20 15:32:03,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 15:32:03,702 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 542 transitions, 6645 flow [2024-06-20 15:32:03,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:03,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:03,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:03,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:32:03,702 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:03,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash 788912984, now seen corresponding path program 15 times [2024-06-20 15:32:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092729212] [2024-06-20 15:32:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092729212] [2024-06-20 15:32:03,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092729212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:03,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:03,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:03,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854603953] [2024-06-20 15:32:03,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:03,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:03,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:03,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 542 transitions, 6645 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:03,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:03,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:03,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:05,424 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-20 15:32:05,425 INFO L125 PetriNetUnfolderBase]: For 1502526/1502526 co-relation queries the response was YES. [2024-06-20 15:32:05,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48735 conditions, 6041 events. 3532/6041 cut-off events. For 1502526/1502526 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42034 event pairs, 922 based on Foata normal form. 1/6026 useless extension candidates. Maximal degree in co-relation 48522. Up to 4869 conditions per place. [2024-06-20 15:32:05,517 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 256 changer transitions 0/558 dead transitions. [2024-06-20 15:32:05,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 558 transitions, 8095 flow [2024-06-20 15:32:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:32:05,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:32:05,518 INFO L175 Difference]: Start difference. First operand has 452 places, 542 transitions, 6645 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:32:05,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 558 transitions, 8095 flow [2024-06-20 15:32:14,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 558 transitions, 7630 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:14,309 INFO L231 Difference]: Finished difference. Result has 455 places, 542 transitions, 6698 flow [2024-06-20 15:32:14,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6698, PETRI_PLACES=455, PETRI_TRANSITIONS=542} [2024-06-20 15:32:14,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:32:14,310 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 542 transitions, 6698 flow [2024-06-20 15:32:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:14,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:32:14,310 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:14,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash -232825062, now seen corresponding path program 16 times [2024-06-20 15:32:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546955710] [2024-06-20 15:32:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546955710] [2024-06-20 15:32:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546955710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:14,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:14,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:14,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918124331] [2024-06-20 15:32:14,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:14,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:14,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:14,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:14,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 542 transitions, 6698 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:32:14,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:14,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:14,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:16,042 INFO L124 PetriNetUnfolderBase]: 3545/6080 cut-off events. [2024-06-20 15:32:16,042 INFO L125 PetriNetUnfolderBase]: For 1532289/1532289 co-relation queries the response was YES. [2024-06-20 15:32:16,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49153 conditions, 6080 events. 3545/6080 cut-off events. For 1532289/1532289 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42412 event pairs, 845 based on Foata normal form. 1/6075 useless extension candidates. Maximal degree in co-relation 48939. Up to 5145 conditions per place. [2024-06-20 15:32:16,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 426 selfloop transitions, 131 changer transitions 0/565 dead transitions. [2024-06-20 15:32:16,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 565 transitions, 8540 flow [2024-06-20 15:32:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:32:16,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:32:16,143 INFO L175 Difference]: Start difference. First operand has 455 places, 542 transitions, 6698 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:32:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 565 transitions, 8540 flow [2024-06-20 15:32:24,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 565 transitions, 7961 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:32:24,963 INFO L231 Difference]: Finished difference. Result has 455 places, 548 transitions, 6447 flow [2024-06-20 15:32:24,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6447, PETRI_PLACES=455, PETRI_TRANSITIONS=548} [2024-06-20 15:32:24,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:32:24,964 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 548 transitions, 6447 flow [2024-06-20 15:32:24,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:32:24,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:24,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:32:24,964 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:24,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:24,964 INFO L85 PathProgramCache]: Analyzing trace with hash -233032452, now seen corresponding path program 17 times [2024-06-20 15:32:24,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:24,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473775999] [2024-06-20 15:32:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473775999] [2024-06-20 15:32:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473775999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:25,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:25,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832176770] [2024-06-20 15:32:25,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:25,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:25,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 548 transitions, 6447 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:25,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:25,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:25,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:26,597 INFO L124 PetriNetUnfolderBase]: 3550/6089 cut-off events. [2024-06-20 15:32:26,598 INFO L125 PetriNetUnfolderBase]: For 1550373/1550373 co-relation queries the response was YES. [2024-06-20 15:32:26,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48937 conditions, 6089 events. 3550/6089 cut-off events. For 1550373/1550373 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42467 event pairs, 845 based on Foata normal form. 1/6084 useless extension candidates. Maximal degree in co-relation 48722. Up to 5151 conditions per place. [2024-06-20 15:32:26,693 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 131 changer transitions 0/568 dead transitions. [2024-06-20 15:32:26,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 568 transitions, 7953 flow [2024-06-20 15:32:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:32:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:32:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:32:26,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-20 15:32:26,695 INFO L175 Difference]: Start difference. First operand has 455 places, 548 transitions, 6447 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:32:26,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 568 transitions, 7953 flow [2024-06-20 15:32:35,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 568 transitions, 7746 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:32:35,016 INFO L231 Difference]: Finished difference. Result has 460 places, 551 transitions, 6538 flow [2024-06-20 15:32:35,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6538, PETRI_PLACES=460, PETRI_TRANSITIONS=551} [2024-06-20 15:32:35,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-20 15:32:35,017 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 551 transitions, 6538 flow [2024-06-20 15:32:35,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:35,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:35,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:35,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:32:35,018 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:35,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1280002040, now seen corresponding path program 18 times [2024-06-20 15:32:35,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:35,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265748382] [2024-06-20 15:32:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:35,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:35,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:35,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265748382] [2024-06-20 15:32:35,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265748382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:35,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:35,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755013005] [2024-06-20 15:32:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:35,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:35,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:35,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 551 transitions, 6538 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:35,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:36,797 INFO L124 PetriNetUnfolderBase]: 3555/6090 cut-off events. [2024-06-20 15:32:36,798 INFO L125 PetriNetUnfolderBase]: For 1569948/1569948 co-relation queries the response was YES. [2024-06-20 15:32:36,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49135 conditions, 6090 events. 3555/6090 cut-off events. For 1569948/1569948 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42461 event pairs, 839 based on Foata normal form. 1/6085 useless extension candidates. Maximal degree in co-relation 48919. Up to 5157 conditions per place. [2024-06-20 15:32:36,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 137 changer transitions 0/583 dead transitions. [2024-06-20 15:32:36,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 583 transitions, 8745 flow [2024-06-20 15:32:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:32:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:32:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-20 15:32:36,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-20 15:32:36,894 INFO L175 Difference]: Start difference. First operand has 460 places, 551 transitions, 6538 flow. Second operand 10 states and 242 transitions. [2024-06-20 15:32:36,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 583 transitions, 8745 flow [2024-06-20 15:32:45,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 583 transitions, 8477 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:32:45,522 INFO L231 Difference]: Finished difference. Result has 463 places, 554 transitions, 6583 flow [2024-06-20 15:32:45,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6276, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6583, PETRI_PLACES=463, PETRI_TRANSITIONS=554} [2024-06-20 15:32:45,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-20 15:32:45,523 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 554 transitions, 6583 flow [2024-06-20 15:32:45,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:45,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:45,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:45,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:32:45,523 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:45,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1279996460, now seen corresponding path program 19 times [2024-06-20 15:32:45,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:45,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104176650] [2024-06-20 15:32:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:45,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:45,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104176650] [2024-06-20 15:32:45,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104176650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:45,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:45,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476177943] [2024-06-20 15:32:45,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:45,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:45,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 554 transitions, 6583 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:45,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:45,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:47,172 INFO L124 PetriNetUnfolderBase]: 3552/6094 cut-off events. [2024-06-20 15:32:47,172 INFO L125 PetriNetUnfolderBase]: For 1576085/1576085 co-relation queries the response was YES. [2024-06-20 15:32:47,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49136 conditions, 6094 events. 3552/6094 cut-off events. For 1576085/1576085 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42504 event pairs, 847 based on Foata normal form. 1/6089 useless extension candidates. Maximal degree in co-relation 48919. Up to 5154 conditions per place. [2024-06-20 15:32:47,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 134 changer transitions 0/580 dead transitions. [2024-06-20 15:32:47,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 580 transitions, 8431 flow [2024-06-20 15:32:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:32:47,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:32:47,268 INFO L175 Difference]: Start difference. First operand has 463 places, 554 transitions, 6583 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:32:47,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 580 transitions, 8431 flow [2024-06-20 15:32:56,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 580 transitions, 8102 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:32:56,494 INFO L231 Difference]: Finished difference. Result has 464 places, 554 transitions, 6530 flow [2024-06-20 15:32:56,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6530, PETRI_PLACES=464, PETRI_TRANSITIONS=554} [2024-06-20 15:32:56,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 15:32:56,495 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 554 transitions, 6530 flow [2024-06-20 15:32:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:56,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:56,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:56,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:32:56,495 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:56,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1291966490, now seen corresponding path program 20 times [2024-06-20 15:32:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:56,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737217675] [2024-06-20 15:32:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:56,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:56,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:56,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737217675] [2024-06-20 15:32:56,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737217675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:56,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:56,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:56,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272255534] [2024-06-20 15:32:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:56,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:56,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:56,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:56,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 554 transitions, 6530 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:56,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:56,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:56,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:58,105 INFO L124 PetriNetUnfolderBase]: 3549/6082 cut-off events. [2024-06-20 15:32:58,105 INFO L125 PetriNetUnfolderBase]: For 1582591/1582591 co-relation queries the response was YES. [2024-06-20 15:32:58,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49038 conditions, 6082 events. 3549/6082 cut-off events. For 1582591/1582591 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42454 event pairs, 839 based on Foata normal form. 1/6077 useless extension candidates. Maximal degree in co-relation 48820. Up to 5151 conditions per place. [2024-06-20 15:32:58,203 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 133 changer transitions 0/573 dead transitions. [2024-06-20 15:32:58,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 573 transitions, 8028 flow [2024-06-20 15:32:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:32:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:32:58,205 INFO L175 Difference]: Start difference. First operand has 464 places, 554 transitions, 6530 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:32:58,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 573 transitions, 8028 flow [2024-06-20 15:33:06,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 573 transitions, 7760 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:06,838 INFO L231 Difference]: Finished difference. Result has 465 places, 554 transitions, 6534 flow [2024-06-20 15:33:06,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6534, PETRI_PLACES=465, PETRI_TRANSITIONS=554} [2024-06-20 15:33:06,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-20 15:33:06,839 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 554 transitions, 6534 flow [2024-06-20 15:33:06,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:06,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:06,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:06,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:33:06,840 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:06,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1286811500, now seen corresponding path program 21 times [2024-06-20 15:33:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:06,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422382012] [2024-06-20 15:33:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:06,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:06,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422382012] [2024-06-20 15:33:06,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422382012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:06,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:06,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:33:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883556823] [2024-06-20 15:33:06,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:06,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:33:06,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:33:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:33:06,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:06,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 554 transitions, 6534 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:33:06,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:06,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:06,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:08,404 INFO L124 PetriNetUnfolderBase]: 3554/6099 cut-off events. [2024-06-20 15:33:08,404 INFO L125 PetriNetUnfolderBase]: For 1601182/1601182 co-relation queries the response was YES. [2024-06-20 15:33:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49192 conditions, 6099 events. 3554/6099 cut-off events. For 1601182/1601182 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42648 event pairs, 847 based on Foata normal form. 1/6094 useless extension candidates. Maximal degree in co-relation 48973. Up to 5157 conditions per place. [2024-06-20 15:33:08,752 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 139 changer transitions 0/575 dead transitions. [2024-06-20 15:33:08,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 575 transitions, 8069 flow [2024-06-20 15:33:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:33:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:33:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:33:08,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:33:08,754 INFO L175 Difference]: Start difference. First operand has 465 places, 554 transitions, 6534 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:33:08,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 575 transitions, 8069 flow [2024-06-20 15:33:18,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 575 transitions, 7753 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:33:18,195 INFO L231 Difference]: Finished difference. Result has 464 places, 557 transitions, 6535 flow [2024-06-20 15:33:18,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6535, PETRI_PLACES=464, PETRI_TRANSITIONS=557} [2024-06-20 15:33:18,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 15:33:18,195 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 557 transitions, 6535 flow [2024-06-20 15:33:18,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:33:18,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:18,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:18,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:33:18,196 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:18,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1114530306, now seen corresponding path program 22 times [2024-06-20 15:33:18,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:18,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185124269] [2024-06-20 15:33:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:18,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185124269] [2024-06-20 15:33:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185124269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:18,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:33:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995898361] [2024-06-20 15:33:18,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:33:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:33:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:33:18,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:18,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 557 transitions, 6535 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:33:18,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:18,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:18,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:19,921 INFO L124 PetriNetUnfolderBase]: 3551/6087 cut-off events. [2024-06-20 15:33:19,922 INFO L125 PetriNetUnfolderBase]: For 1607059/1607059 co-relation queries the response was YES. [2024-06-20 15:33:20,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6087 events. 3551/6087 cut-off events. For 1607059/1607059 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42443 event pairs, 839 based on Foata normal form. 1/6082 useless extension candidates. Maximal degree in co-relation 48878. Up to 5154 conditions per place. [2024-06-20 15:33:20,021 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 137 changer transitions 0/577 dead transitions. [2024-06-20 15:33:20,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 577 transitions, 7723 flow [2024-06-20 15:33:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:33:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:33:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:33:20,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:33:20,022 INFO L175 Difference]: Start difference. First operand has 464 places, 557 transitions, 6535 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:33:20,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 577 transitions, 7723 flow [2024-06-20 15:33:29,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 577 transitions, 7294 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:29,191 INFO L231 Difference]: Finished difference. Result has 464 places, 557 transitions, 6388 flow [2024-06-20 15:33:29,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6388, PETRI_PLACES=464, PETRI_TRANSITIONS=557} [2024-06-20 15:33:29,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 15:33:29,191 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 557 transitions, 6388 flow [2024-06-20 15:33:29,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-20 15:33:29,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:29,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:29,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:33:29,192 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:29,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -198625733, now seen corresponding path program 9 times [2024-06-20 15:33:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75512940] [2024-06-20 15:33:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:29,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:29,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75512940] [2024-06-20 15:33:29,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75512940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:29,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:29,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714776611] [2024-06-20 15:33:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:29,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:29,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 557 transitions, 6388 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:29,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:29,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:29,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:30,999 INFO L124 PetriNetUnfolderBase]: 3605/6139 cut-off events. [2024-06-20 15:33:30,999 INFO L125 PetriNetUnfolderBase]: For 1757800/1757800 co-relation queries the response was YES. [2024-06-20 15:33:31,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51441 conditions, 6139 events. 3605/6139 cut-off events. For 1757800/1757800 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 42655 event pairs, 966 based on Foata normal form. 2/6125 useless extension candidates. Maximal degree in co-relation 51220. Up to 4880 conditions per place. [2024-06-20 15:33:31,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 271 changer transitions 0/591 dead transitions. [2024-06-20 15:33:31,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 591 transitions, 8142 flow [2024-06-20 15:33:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:33:31,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:33:31,099 INFO L175 Difference]: Start difference. First operand has 464 places, 557 transitions, 6388 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:33:31,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 591 transitions, 8142 flow [2024-06-20 15:33:41,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 591 transitions, 7730 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:33:41,831 INFO L231 Difference]: Finished difference. Result has 464 places, 561 transitions, 6695 flow [2024-06-20 15:33:41,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6695, PETRI_PLACES=464, PETRI_TRANSITIONS=561} [2024-06-20 15:33:41,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 15:33:41,832 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 561 transitions, 6695 flow [2024-06-20 15:33:41,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:41,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:41,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:41,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:33:41,833 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:41,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash -190054853, now seen corresponding path program 10 times [2024-06-20 15:33:41,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:41,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282702922] [2024-06-20 15:33:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:41,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282702922] [2024-06-20 15:33:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282702922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:41,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:41,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:41,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890126077] [2024-06-20 15:33:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:41,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:41,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 561 transitions, 6695 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:41,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:41,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:41,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:43,516 INFO L124 PetriNetUnfolderBase]: 3613/6156 cut-off events. [2024-06-20 15:33:43,516 INFO L125 PetriNetUnfolderBase]: For 1779429/1779429 co-relation queries the response was YES. [2024-06-20 15:33:43,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52073 conditions, 6156 events. 3613/6156 cut-off events. For 1779429/1779429 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 42806 event pairs, 973 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 51851. Up to 4981 conditions per place. [2024-06-20 15:33:43,622 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 268 changer transitions 0/585 dead transitions. [2024-06-20 15:33:43,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 585 transitions, 7991 flow [2024-06-20 15:33:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:33:43,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 15:33:43,623 INFO L175 Difference]: Start difference. First operand has 464 places, 561 transitions, 6695 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:33:43,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 585 transitions, 7991 flow [2024-06-20 15:33:54,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 585 transitions, 7543 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 15:33:54,402 INFO L231 Difference]: Finished difference. Result has 468 places, 563 transitions, 6880 flow [2024-06-20 15:33:54,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6880, PETRI_PLACES=468, PETRI_TRANSITIONS=563} [2024-06-20 15:33:54,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 15:33:54,402 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 563 transitions, 6880 flow [2024-06-20 15:33:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:54,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:54,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:54,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:33:54,403 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:54,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1286985275, now seen corresponding path program 11 times [2024-06-20 15:33:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:54,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132573882] [2024-06-20 15:33:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:54,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132573882] [2024-06-20 15:33:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132573882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:54,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:54,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675833284] [2024-06-20 15:33:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:54,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:54,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:54,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 563 transitions, 6880 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:54,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:54,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:54,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:56,212 INFO L124 PetriNetUnfolderBase]: 3621/6168 cut-off events. [2024-06-20 15:33:56,212 INFO L125 PetriNetUnfolderBase]: For 1797392/1797392 co-relation queries the response was YES. [2024-06-20 15:33:56,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52587 conditions, 6168 events. 3621/6168 cut-off events. For 1797392/1797392 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42894 event pairs, 973 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 52363. Up to 4993 conditions per place. [2024-06-20 15:33:56,317 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 266 changer transitions 0/584 dead transitions. [2024-06-20 15:33:56,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 584 transitions, 8148 flow [2024-06-20 15:33:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:33:56,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:33:56,318 INFO L175 Difference]: Start difference. First operand has 468 places, 563 transitions, 6880 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:33:56,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 584 transitions, 8148 flow [2024-06-20 15:34:07,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 584 transitions, 7557 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:34:07,111 INFO L231 Difference]: Finished difference. Result has 470 places, 565 transitions, 6900 flow [2024-06-20 15:34:07,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6900, PETRI_PLACES=470, PETRI_TRANSITIONS=565} [2024-06-20 15:34:07,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 15:34:07,112 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 565 transitions, 6900 flow [2024-06-20 15:34:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:07,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:07,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:34:07,113 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:07,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash 592540807, now seen corresponding path program 12 times [2024-06-20 15:34:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:07,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374106911] [2024-06-20 15:34:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374106911] [2024-06-20 15:34:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374106911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:07,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429327439] [2024-06-20 15:34:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:07,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:07,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 565 transitions, 6900 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:07,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:07,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:07,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:08,826 INFO L124 PetriNetUnfolderBase]: 3657/6224 cut-off events. [2024-06-20 15:34:08,827 INFO L125 PetriNetUnfolderBase]: For 1937002/1937002 co-relation queries the response was YES. [2024-06-20 15:34:08,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53355 conditions, 6224 events. 3657/6224 cut-off events. For 1937002/1937002 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 43322 event pairs, 977 based on Foata normal form. 10/6218 useless extension candidates. Maximal degree in co-relation 53130. Up to 5017 conditions per place. [2024-06-20 15:34:08,928 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 261 changer transitions 0/586 dead transitions. [2024-06-20 15:34:08,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 586 transitions, 8194 flow [2024-06-20 15:34:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:34:08,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:34:08,929 INFO L175 Difference]: Start difference. First operand has 470 places, 565 transitions, 6900 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:34:08,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 586 transitions, 8194 flow [2024-06-20 15:34:19,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 586 transitions, 7603 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:34:19,840 INFO L231 Difference]: Finished difference. Result has 472 places, 567 transitions, 6915 flow [2024-06-20 15:34:19,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6915, PETRI_PLACES=472, PETRI_TRANSITIONS=567} [2024-06-20 15:34:19,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-20 15:34:19,840 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 567 transitions, 6915 flow [2024-06-20 15:34:19,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:19,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:19,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 15:34:19,841 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:19,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1134076593, now seen corresponding path program 13 times [2024-06-20 15:34:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700152974] [2024-06-20 15:34:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:19,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700152974] [2024-06-20 15:34:19,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700152974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:19,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:19,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:19,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174727906] [2024-06-20 15:34:19,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:19,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:19,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:19,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:34:19,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 567 transitions, 6915 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:19,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:19,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:34:20,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:21,679 INFO L124 PetriNetUnfolderBase]: 3634/6219 cut-off events. [2024-06-20 15:34:21,679 INFO L125 PetriNetUnfolderBase]: For 1816342/1816342 co-relation queries the response was YES. [2024-06-20 15:34:21,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51387 conditions, 6219 events. 3634/6219 cut-off events. For 1816342/1816342 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 43466 event pairs, 847 based on Foata normal form. 10/6223 useless extension candidates. Maximal degree in co-relation 51161. Up to 5227 conditions per place. [2024-06-20 15:34:21,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 139 changer transitions 0/598 dead transitions. [2024-06-20 15:34:21,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 598 transitions, 8191 flow [2024-06-20 15:34:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:34:21,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:34:21,783 INFO L175 Difference]: Start difference. First operand has 472 places, 567 transitions, 6915 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:34:21,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 598 transitions, 8191 flow