./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:35:22,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:35:22,468 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:35:22,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:35:22,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:35:22,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:35:22,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:35:22,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:35:22,506 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:35:22,510 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:35:22,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:35:22,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:35:22,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:35:22,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:35:22,513 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:35:22,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:35:22,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:35:22,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:35:22,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:35:22,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:35:22,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:35:22,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:35:22,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:35:22,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:35:22,518 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:35:22,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:35:22,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:35:22,519 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:35:22,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:35:22,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:35:22,520 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:35:22,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:35:22,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:35:22,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:35:22,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:35:22,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:35:22,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:35:22,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:35:22,523 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:35:22,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:35:22,523 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:35:22,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:35:22,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:35:22,524 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:35:22,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:35:22,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:35:22,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:35:22,810 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:35:22,811 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:35:22,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-27 21:35:23,989 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:35:24,247 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:35:24,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-27 21:35:24,266 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1c7e507/d0f8b85e819f4e37a8f3dea322e39e41/FLAG0e1be41f2 [2024-06-27 21:35:24,280 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1c7e507/d0f8b85e819f4e37a8f3dea322e39e41 [2024-06-27 21:35:24,282 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:35:24,283 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:35:24,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 21:35:24,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:35:24,454 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:35:24,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:35:24,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:35:24,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:35:24,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:35:24" (1/2) ... [2024-06-27 21:35:24,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfb74ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:35:24, skipping insertion in model container [2024-06-27 21:35:24,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:35:24" (1/2) ... [2024-06-27 21:35:24,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fa60683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:35:24, skipping insertion in model container [2024-06-27 21:35:24,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:35:24" (2/2) ... [2024-06-27 21:35:24,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfb74ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:24, skipping insertion in model container [2024-06-27 21:35:24,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:35:24" (2/2) ... [2024-06-27 21:35:24,465 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:35:24,555 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:35:24,556 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 21:35:24,557 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 21:35:24,578 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 21:35:24,578 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:35:24,578 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-27 21:35:24,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:35:25,011 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:35:25,021 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:35:25,162 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:35:25,193 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:35:25,193 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25 WrapperNode [2024-06-27 21:35:25,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:35:25,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:35:25,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:35:25,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:35:25,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,256 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-27 21:35:25,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:35:25,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:35:25,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:35:25,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:35:25,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,305 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:35:25,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:35:25,322 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:35:25,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:35:25,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:35:25,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (1/1) ... [2024-06-27 21:35:25,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:35:25,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:35:25,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:35:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:35:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:35:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:35:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:35:25,397 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:35:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:35:25,398 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:35:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:35:25,398 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:35:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:35:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:35:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:35:25,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:35:25,400 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:35:25,543 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:35:25,544 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:35:25,903 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:35:25,903 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:35:26,100 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:35:26,100 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:35:26,101 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:35:26 BoogieIcfgContainer [2024-06-27 21:35:26,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:35:26,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:35:26,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:35:26,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:35:26,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:35:24" (1/4) ... [2024-06-27 21:35:26,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccb8e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:35:26, skipping insertion in model container [2024-06-27 21:35:26,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:35:24" (2/4) ... [2024-06-27 21:35:26,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccb8e6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:35:26, skipping insertion in model container [2024-06-27 21:35:26,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:35:25" (3/4) ... [2024-06-27 21:35:26,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccb8e6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:35:26, skipping insertion in model container [2024-06-27 21:35:26,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:35:26" (4/4) ... [2024-06-27 21:35:26,111 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-27 21:35:26,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:35:26,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:35:26,126 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:35:26,166 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:35:26,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:35:26,231 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:35:26,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:35:26,233 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 5. 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. [2024-06-27 21:35:26,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:35:26,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:35:26,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:35:26,255 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;@75b51b03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:35:26,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:35:26,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:35:26,260 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:35:26,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:35:26,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:26,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:35:26,262 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)] === [2024-06-27 21:35:26,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:26,266 INFO L85 PathProgramCache]: Analyzing trace with hash 364147537, now seen corresponding path program 1 times [2024-06-27 21:35:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:26,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124052861] [2024-06-27 21:35:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:27,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124052861] [2024-06-27 21:35:27,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124052861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:27,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:27,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:35:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412834455] [2024-06-27 21:35:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:27,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:35:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:35:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:35:27,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 21:35:27,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:27,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:27,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 21:35:27,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:27,652 INFO L124 PetriNetUnfolderBase]: 1059/1629 cut-off events. [2024-06-27 21:35:27,652 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 21:35:27,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1629 events. 1059/1629 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8049 event pairs, 698 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 3281. Up to 1593 conditions per place. [2024-06-27 21:35:27,665 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 21:35:27,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-27 21:35:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:35:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:35:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 21:35:27,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 21:35:27,678 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 74 transitions. [2024-06-27 21:35:27,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-27 21:35:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:27,684 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:35:27,686 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} [2024-06-27 21:35:27,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:35:27,689 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:35:27,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:27,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:27,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:27,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:35:27,690 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)] === [2024-06-27 21:35:27,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2054472650, now seen corresponding path program 1 times [2024-06-27 21:35:27,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:27,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208326319] [2024-06-27 21:35:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208326319] [2024-06-27 21:35:28,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208326319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:28,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:28,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:35:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704794310] [2024-06-27 21:35:28,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:28,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:35:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:28,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:35:28,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:35:28,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 21:35:28,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:28,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:28,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 21:35:28,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:28,534 INFO L124 PetriNetUnfolderBase]: 1053/1620 cut-off events. [2024-06-27 21:35:28,535 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-06-27 21:35:28,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 1620 events. 1053/1620 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7918 event pairs, 618 based on Foata normal form. 3/1621 useless extension candidates. Maximal degree in co-relation 3731. Up to 1569 conditions per place. [2024-06-27 21:35:28,545 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 21:35:28,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 236 flow [2024-06-27 21:35:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:35:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:35:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-27 21:35:28,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 21:35:28,575 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 96 transitions. [2024-06-27 21:35:28,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 236 flow [2024-06-27 21:35:28,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:35:28,577 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 21:35:28,578 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 21:35:28,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 21:35:28,579 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 21:35:28,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:28,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:28,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:28,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:35:28,580 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)] === [2024-06-27 21:35:28,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash 964719951, now seen corresponding path program 1 times [2024-06-27 21:35:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:28,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082711350] [2024-06-27 21:35:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082711350] [2024-06-27 21:35:29,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082711350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:29,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:29,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:35:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147383233] [2024-06-27 21:35:29,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:29,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:35:29,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:35:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:35:29,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:29,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:29,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:29,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:29,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:29,595 INFO L124 PetriNetUnfolderBase]: 1342/2032 cut-off events. [2024-06-27 21:35:29,595 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-27 21:35:29,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 2032 events. 1342/2032 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9696 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-27 21:35:29,610 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-27 21:35:29,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 270 flow [2024-06-27 21:35:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:35:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:35:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 21:35:29,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 21:35:29,612 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 91 transitions. [2024-06-27 21:35:29,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 270 flow [2024-06-27 21:35:29,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:35:29,615 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2024-06-27 21:35:29,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 21:35:29,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-27 21:35:29,616 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2024-06-27 21:35:29,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:29,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:29,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:29,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:35:29,617 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)] === [2024-06-27 21:35:29,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -250177554, now seen corresponding path program 1 times [2024-06-27 21:35:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:29,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274155920] [2024-06-27 21:35:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:29,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:30,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:30,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274155920] [2024-06-27 21:35:30,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274155920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:30,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:30,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:35:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251616285] [2024-06-27 21:35:30,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:30,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:35:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:35:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:35:30,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:35:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:30,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:30,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:35:30,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:30,635 INFO L124 PetriNetUnfolderBase]: 1333/2017 cut-off events. [2024-06-27 21:35:30,635 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-06-27 21:35:30,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 2017 events. 1333/2017 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9630 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-27 21:35:30,649 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 21:35:30,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 378 flow [2024-06-27 21:35:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-27 21:35:30,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-27 21:35:30,658 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 6 states and 131 transitions. [2024-06-27 21:35:30,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 378 flow [2024-06-27 21:35:30,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:30,664 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 205 flow [2024-06-27 21:35:30,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 21:35:30,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 21:35:30,666 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 205 flow [2024-06-27 21:35:30,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:30,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:30,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:30,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:35:30,667 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)] === [2024-06-27 21:35:30,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -158451778, now seen corresponding path program 1 times [2024-06-27 21:35:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602754360] [2024-06-27 21:35:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:31,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:31,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602754360] [2024-06-27 21:35:31,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602754360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:31,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:35:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471857024] [2024-06-27 21:35:31,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:35:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:35:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:35:31,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:31,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 21:35:31,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:31,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:31,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:31,868 INFO L124 PetriNetUnfolderBase]: 1323/2003 cut-off events. [2024-06-27 21:35:31,869 INFO L125 PetriNetUnfolderBase]: For 3192/3192 co-relation queries the response was YES. [2024-06-27 21:35:31,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6113 conditions, 2003 events. 1323/2003 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9524 event pairs, 556 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 6095. Up to 1948 conditions per place. [2024-06-27 21:35:31,884 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-06-27 21:35:31,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 381 flow [2024-06-27 21:35:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:35:31,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:35:31,886 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 205 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:35:31,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 381 flow [2024-06-27 21:35:31,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 352 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:31,890 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 230 flow [2024-06-27 21:35:31,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-27 21:35:31,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-27 21:35:31,892 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 230 flow [2024-06-27 21:35:31,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 21:35:31,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:31,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:35:31,893 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)] === [2024-06-27 21:35:31,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash 265243754, now seen corresponding path program 1 times [2024-06-27 21:35:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:31,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418167132] [2024-06-27 21:35:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:32,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:32,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418167132] [2024-06-27 21:35:32,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418167132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:32,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:32,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:35:32,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283899171] [2024-06-27 21:35:32,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:32,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:35:32,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:35:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:35:32,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:32,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 21:35:32,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:32,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:32,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:33,029 INFO L124 PetriNetUnfolderBase]: 1334/2025 cut-off events. [2024-06-27 21:35:33,029 INFO L125 PetriNetUnfolderBase]: For 4482/4486 co-relation queries the response was YES. [2024-06-27 21:35:33,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 2025 events. 1334/2025 cut-off events. For 4482/4486 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9750 event pairs, 557 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 6612. Up to 1947 conditions per place. [2024-06-27 21:35:33,044 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-27 21:35:33,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 478 flow [2024-06-27 21:35:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:35:33,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:35:33,046 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 230 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:35:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 478 flow [2024-06-27 21:35:33,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 448 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:33,050 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 286 flow [2024-06-27 21:35:33,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-27 21:35:33,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-27 21:35:33,051 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 286 flow [2024-06-27 21:35:33,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 21:35:33,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:33,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:33,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:35:33,052 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)] === [2024-06-27 21:35:33,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash -577721786, now seen corresponding path program 2 times [2024-06-27 21:35:33,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:33,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280386438] [2024-06-27 21:35:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:33,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:33,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280386438] [2024-06-27 21:35:33,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280386438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:33,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:33,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:35:33,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779324955] [2024-06-27 21:35:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:33,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:35:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:35:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:35:33,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:33,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 21:35:33,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:33,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:33,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:34,178 INFO L124 PetriNetUnfolderBase]: 1329/2012 cut-off events. [2024-06-27 21:35:34,179 INFO L125 PetriNetUnfolderBase]: For 6020/6020 co-relation queries the response was YES. [2024-06-27 21:35:34,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7059 conditions, 2012 events. 1329/2012 cut-off events. For 6020/6020 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9663 event pairs, 560 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 7038. Up to 1942 conditions per place. [2024-06-27 21:35:34,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 21:35:34,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 452 flow [2024-06-27 21:35:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:35:34,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:35:34,199 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 286 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:35:34,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 452 flow [2024-06-27 21:35:34,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 418 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 21:35:34,206 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 292 flow [2024-06-27 21:35:34,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-27 21:35:34,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-27 21:35:34,208 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 292 flow [2024-06-27 21:35:34,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-27 21:35:34,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:34,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:34,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:35:34,209 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)] === [2024-06-27 21:35:34,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:34,210 INFO L85 PathProgramCache]: Analyzing trace with hash -95457399, now seen corresponding path program 1 times [2024-06-27 21:35:34,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:34,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020422471] [2024-06-27 21:35:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:34,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:34,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020422471] [2024-06-27 21:35:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020422471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:34,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:34,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:34,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208828487] [2024-06-27 21:35:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:34,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:34,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:34,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:34,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:34,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:34,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:35,535 INFO L124 PetriNetUnfolderBase]: 1408/2139 cut-off events. [2024-06-27 21:35:35,535 INFO L125 PetriNetUnfolderBase]: For 7677/7677 co-relation queries the response was YES. [2024-06-27 21:35:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7673 conditions, 2139 events. 1408/2139 cut-off events. For 7677/7677 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10360 event pairs, 515 based on Foata normal form. 4/2142 useless extension candidates. Maximal degree in co-relation 7650. Up to 1947 conditions per place. [2024-06-27 21:35:35,558 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 68 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-27 21:35:35,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 787 flow [2024-06-27 21:35:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:35:35,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-27 21:35:35,561 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 292 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:35:35,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 787 flow [2024-06-27 21:35:35,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 709 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:35,571 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 493 flow [2024-06-27 21:35:35,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-06-27 21:35:35,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-27 21:35:35,572 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 493 flow [2024-06-27 21:35:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:35,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:35,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:35:35,574 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)] === [2024-06-27 21:35:35,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash -432105655, now seen corresponding path program 2 times [2024-06-27 21:35:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:35,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314339952] [2024-06-27 21:35:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314339952] [2024-06-27 21:35:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314339952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:36,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096050181] [2024-06-27 21:35:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:36,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:36,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:36,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:36,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:36,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:36,915 INFO L124 PetriNetUnfolderBase]: 1444/2201 cut-off events. [2024-06-27 21:35:36,915 INFO L125 PetriNetUnfolderBase]: For 10103/10103 co-relation queries the response was YES. [2024-06-27 21:35:36,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8583 conditions, 2201 events. 1444/2201 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10689 event pairs, 514 based on Foata normal form. 6/2206 useless extension candidates. Maximal degree in co-relation 8557. Up to 1979 conditions per place. [2024-06-27 21:35:36,933 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 42 changer transitions 0/109 dead transitions. [2024-06-27 21:35:36,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 881 flow [2024-06-27 21:35:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 21:35:36,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-27 21:35:36,935 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 493 flow. Second operand 7 states and 134 transitions. [2024-06-27 21:35:36,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 881 flow [2024-06-27 21:35:36,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 109 transitions, 855 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 21:35:36,946 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 628 flow [2024-06-27 21:35:36,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2024-06-27 21:35:36,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 21:35:36,948 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 628 flow [2024-06-27 21:35:36,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:36,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:36,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:36,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:35:36,948 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)] === [2024-06-27 21:35:36,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:36,949 INFO L85 PathProgramCache]: Analyzing trace with hash -729238459, now seen corresponding path program 3 times [2024-06-27 21:35:36,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:36,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19076534] [2024-06-27 21:35:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:36,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:37,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19076534] [2024-06-27 21:35:37,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19076534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:37,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:37,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86495403] [2024-06-27 21:35:37,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:37,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:37,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:37,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:37,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:37,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:37,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:37,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:38,230 INFO L124 PetriNetUnfolderBase]: 1480/2248 cut-off events. [2024-06-27 21:35:38,231 INFO L125 PetriNetUnfolderBase]: For 12383/12383 co-relation queries the response was YES. [2024-06-27 21:35:38,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9274 conditions, 2248 events. 1480/2248 cut-off events. For 12383/12383 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10883 event pairs, 510 based on Foata normal form. 6/2253 useless extension candidates. Maximal degree in co-relation 9246. Up to 2011 conditions per place. [2024-06-27 21:35:38,248 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 49 changer transitions 0/112 dead transitions. [2024-06-27 21:35:38,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 1032 flow [2024-06-27 21:35:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:35:38,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 21:35:38,250 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 628 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:35:38,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 1032 flow [2024-06-27 21:35:38,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:38,267 INFO L231 Difference]: Finished difference. Result has 72 places, 87 transitions, 711 flow [2024-06-27 21:35:38,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=72, PETRI_TRANSITIONS=87} [2024-06-27 21:35:38,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 21:35:38,268 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 87 transitions, 711 flow [2024-06-27 21:35:38,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:38,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:38,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:38,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:35:38,268 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)] === [2024-06-27 21:35:38,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1948553089, now seen corresponding path program 4 times [2024-06-27 21:35:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580518489] [2024-06-27 21:35:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:38,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:38,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580518489] [2024-06-27 21:35:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580518489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:38,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:38,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696278113] [2024-06-27 21:35:38,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:38,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:38,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:38,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:38,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 87 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:38,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:38,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:38,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:39,556 INFO L124 PetriNetUnfolderBase]: 1464/2228 cut-off events. [2024-06-27 21:35:39,557 INFO L125 PetriNetUnfolderBase]: For 12404/12404 co-relation queries the response was YES. [2024-06-27 21:35:39,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 2228 events. 1464/2228 cut-off events. For 12404/12404 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10759 event pairs, 513 based on Foata normal form. 6/2233 useless extension candidates. Maximal degree in co-relation 9060. Up to 1998 conditions per place. [2024-06-27 21:35:39,576 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 47 changer transitions 0/110 dead transitions. [2024-06-27 21:35:39,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 995 flow [2024-06-27 21:35:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:35:39,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 21:35:39,578 INFO L175 Difference]: Start difference. First operand has 72 places, 87 transitions, 711 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:35:39,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 995 flow [2024-06-27 21:35:39,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 862 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:39,600 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 683 flow [2024-06-27 21:35:39,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=683, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-27 21:35:39,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 21:35:39,601 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 683 flow [2024-06-27 21:35:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:39,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:39,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:39,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:35:39,602 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)] === [2024-06-27 21:35:39,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1948276259, now seen corresponding path program 1 times [2024-06-27 21:35:39,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521512635] [2024-06-27 21:35:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:40,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:40,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521512635] [2024-06-27 21:35:40,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521512635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:40,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:40,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:40,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817511977] [2024-06-27 21:35:40,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:40,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:40,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:40,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:40,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:40,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:40,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:40,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:40,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:40,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:41,317 INFO L124 PetriNetUnfolderBase]: 1456/2219 cut-off events. [2024-06-27 21:35:41,318 INFO L125 PetriNetUnfolderBase]: For 13686/13686 co-relation queries the response was YES. [2024-06-27 21:35:41,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 2219 events. 1456/2219 cut-off events. For 13686/13686 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10658 event pairs, 519 based on Foata normal form. 4/2223 useless extension candidates. Maximal degree in co-relation 9072. Up to 2123 conditions per place. [2024-06-27 21:35:41,333 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 92 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-27 21:35:41,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 110 transitions, 979 flow [2024-06-27 21:35:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:35:41,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:35:41,335 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 683 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:35:41,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 110 transitions, 979 flow [2024-06-27 21:35:41,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 845 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:41,358 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 610 flow [2024-06-27 21:35:41,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=610, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-27 21:35:41,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 21:35:41,360 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 610 flow [2024-06-27 21:35:41,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:41,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:41,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:35:41,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:41,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash -555715092, now seen corresponding path program 1 times [2024-06-27 21:35:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229006092] [2024-06-27 21:35:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:41,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:41,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229006092] [2024-06-27 21:35:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229006092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:41,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:41,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:35:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571973581] [2024-06-27 21:35:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:41,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:35:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:35:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:35:41,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:41,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:41,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:41,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:41,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:42,330 INFO L124 PetriNetUnfolderBase]: 1323/2086 cut-off events. [2024-06-27 21:35:42,331 INFO L125 PetriNetUnfolderBase]: For 14238/14238 co-relation queries the response was YES. [2024-06-27 21:35:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8589 conditions, 2086 events. 1323/2086 cut-off events. For 14238/14238 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10220 event pairs, 556 based on Foata normal form. 1/2087 useless extension candidates. Maximal degree in co-relation 8559. Up to 1959 conditions per place. [2024-06-27 21:35:42,348 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-06-27 21:35:42,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 814 flow [2024-06-27 21:35:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:35:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:35:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:35:42,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:35:42,350 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 610 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:35:42,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 814 flow [2024-06-27 21:35:42,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 771 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:42,367 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 615 flow [2024-06-27 21:35:42,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=615, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2024-06-27 21:35:42,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 21:35:42,368 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 615 flow [2024-06-27 21:35:42,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:42,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:42,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:42,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:35:42,369 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:42,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash -510557147, now seen corresponding path program 1 times [2024-06-27 21:35:42,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:42,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631913357] [2024-06-27 21:35:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:42,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:42,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631913357] [2024-06-27 21:35:42,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631913357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:42,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:42,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:42,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393360956] [2024-06-27 21:35:42,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:43,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:43,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:43,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:43,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:43,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:43,576 INFO L124 PetriNetUnfolderBase]: 1464/2238 cut-off events. [2024-06-27 21:35:43,576 INFO L125 PetriNetUnfolderBase]: For 16613/16613 co-relation queries the response was YES. [2024-06-27 21:35:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 2238 events. 1464/2238 cut-off events. For 16613/16613 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10838 event pairs, 529 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 9588. Up to 2130 conditions per place. [2024-06-27 21:35:43,594 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2024-06-27 21:35:43,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 953 flow [2024-06-27 21:35:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:35:43,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-27 21:35:43,596 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 615 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:35:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 953 flow [2024-06-27 21:35:43,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 927 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:43,615 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 665 flow [2024-06-27 21:35:43,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-27 21:35:43,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-27 21:35:43,616 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 665 flow [2024-06-27 21:35:43,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:43,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:43,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:43,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:35:43,618 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)] === [2024-06-27 21:35:43,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash -510379517, now seen corresponding path program 2 times [2024-06-27 21:35:43,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:43,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857018935] [2024-06-27 21:35:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:44,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857018935] [2024-06-27 21:35:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857018935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:44,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:44,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397251188] [2024-06-27 21:35:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:44,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:44,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:44,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:44,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 665 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:44,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:44,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:44,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:44,831 INFO L124 PetriNetUnfolderBase]: 1475/2258 cut-off events. [2024-06-27 21:35:44,831 INFO L125 PetriNetUnfolderBase]: For 19490/19492 co-relation queries the response was YES. [2024-06-27 21:35:44,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10206 conditions, 2258 events. 1475/2258 cut-off events. For 19490/19492 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11003 event pairs, 523 based on Foata normal form. 4/2262 useless extension candidates. Maximal degree in co-relation 10174. Up to 2075 conditions per place. [2024-06-27 21:35:44,847 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-27 21:35:44,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1111 flow [2024-06-27 21:35:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:35:44,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 21:35:44,849 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 665 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:35:44,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1111 flow [2024-06-27 21:35:44,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1059 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:44,872 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 765 flow [2024-06-27 21:35:44,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=765, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-06-27 21:35:44,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 21:35:44,872 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 765 flow [2024-06-27 21:35:44,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:44,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:44,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:35:44,873 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)] === [2024-06-27 21:35:44,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -808665077, now seen corresponding path program 3 times [2024-06-27 21:35:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460380325] [2024-06-27 21:35:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:45,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460380325] [2024-06-27 21:35:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460380325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:45,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856547626] [2024-06-27 21:35:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:45,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:45,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:45,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:45,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:46,102 INFO L124 PetriNetUnfolderBase]: 1470/2242 cut-off events. [2024-06-27 21:35:46,102 INFO L125 PetriNetUnfolderBase]: For 22776/22776 co-relation queries the response was YES. [2024-06-27 21:35:46,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10623 conditions, 2242 events. 1470/2242 cut-off events. For 22776/22776 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10867 event pairs, 531 based on Foata normal form. 2/2242 useless extension candidates. Maximal degree in co-relation 10590. Up to 2070 conditions per place. [2024-06-27 21:35:46,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 33 changer transitions 0/122 dead transitions. [2024-06-27 21:35:46,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1071 flow [2024-06-27 21:35:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:35:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:35:46,121 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 765 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:35:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1071 flow [2024-06-27 21:35:46,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1003 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:46,153 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 772 flow [2024-06-27 21:35:46,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-27 21:35:46,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-27 21:35:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 772 flow [2024-06-27 21:35:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:46,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:46,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:35:46,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:46,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -47297489, now seen corresponding path program 1 times [2024-06-27 21:35:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:46,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051178818] [2024-06-27 21:35:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:46,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051178818] [2024-06-27 21:35:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051178818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:35:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298262771] [2024-06-27 21:35:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:35:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:35:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:35:46,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:46,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 772 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:46,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:46,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:46,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:47,166 INFO L124 PetriNetUnfolderBase]: 1342/2123 cut-off events. [2024-06-27 21:35:47,167 INFO L125 PetriNetUnfolderBase]: For 24687/24692 co-relation queries the response was YES. [2024-06-27 21:35:47,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10218 conditions, 2123 events. 1342/2123 cut-off events. For 24687/24692 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10527 event pairs, 527 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 10183. Up to 1934 conditions per place. [2024-06-27 21:35:47,184 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-27 21:35:47,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 1092 flow [2024-06-27 21:35:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:35:47,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-27 21:35:47,186 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 772 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:35:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 1092 flow [2024-06-27 21:35:47,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 1006 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:47,216 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 813 flow [2024-06-27 21:35:47,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=813, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2024-06-27 21:35:47,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 21:35:47,217 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 813 flow [2024-06-27 21:35:47,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:47,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:47,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:47,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:35:47,218 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)] === [2024-06-27 21:35:47,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1205762398, now seen corresponding path program 1 times [2024-06-27 21:35:47,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:47,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916264233] [2024-06-27 21:35:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:47,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916264233] [2024-06-27 21:35:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916264233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:47,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:47,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887809198] [2024-06-27 21:35:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:47,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:47,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:47,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:47,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:47,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:47,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:48,615 INFO L124 PetriNetUnfolderBase]: 1585/2437 cut-off events. [2024-06-27 21:35:48,615 INFO L125 PetriNetUnfolderBase]: For 30405/30405 co-relation queries the response was YES. [2024-06-27 21:35:48,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 2437 events. 1585/2437 cut-off events. For 30405/30405 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12004 event pairs, 521 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 12301. Up to 2234 conditions per place. [2024-06-27 21:35:48,631 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 132 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-27 21:35:48,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 173 transitions, 1548 flow [2024-06-27 21:35:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:35:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:35:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-27 21:35:48,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-27 21:35:48,633 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 813 flow. Second operand 11 states and 199 transitions. [2024-06-27 21:35:48,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 173 transitions, 1548 flow [2024-06-27 21:35:48,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 173 transitions, 1507 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 21:35:48,702 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1060 flow [2024-06-27 21:35:48,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1060, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2024-06-27 21:35:48,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 21:35:48,704 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1060 flow [2024-06-27 21:35:48,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:48,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:48,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:48,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:35:48,705 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)] === [2024-06-27 21:35:48,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1010165820, now seen corresponding path program 2 times [2024-06-27 21:35:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:48,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072125154] [2024-06-27 21:35:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:49,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:49,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072125154] [2024-06-27 21:35:49,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072125154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:49,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:49,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:49,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001556914] [2024-06-27 21:35:49,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:49,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:49,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:49,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:49,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1060 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:49,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:49,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:49,944 INFO L124 PetriNetUnfolderBase]: 1569/2413 cut-off events. [2024-06-27 21:35:49,945 INFO L125 PetriNetUnfolderBase]: For 34284/34284 co-relation queries the response was YES. [2024-06-27 21:35:49,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 2413 events. 1569/2413 cut-off events. For 34284/34284 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11902 event pairs, 520 based on Foata normal form. 6/2419 useless extension candidates. Maximal degree in co-relation 12779. Up to 2221 conditions per place. [2024-06-27 21:35:49,961 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-06-27 21:35:49,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1487 flow [2024-06-27 21:35:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:35:49,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:35:49,963 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1060 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:35:49,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1487 flow [2024-06-27 21:35:49,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1378 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:49,996 INFO L231 Difference]: Finished difference. Result has 102 places, 129 transitions, 1036 flow [2024-06-27 21:35:49,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1036, PETRI_PLACES=102, PETRI_TRANSITIONS=129} [2024-06-27 21:35:49,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-27 21:35:49,997 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 129 transitions, 1036 flow [2024-06-27 21:35:49,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:49,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:49,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:35:49,998 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)] === [2024-06-27 21:35:49,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash -862348830, now seen corresponding path program 3 times [2024-06-27 21:35:49,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:49,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948689426] [2024-06-27 21:35:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:50,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:50,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948689426] [2024-06-27 21:35:50,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948689426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:50,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:50,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:50,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576918735] [2024-06-27 21:35:50,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:50,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:50,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:50,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:50,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 129 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:50,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:50,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:50,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:51,405 INFO L124 PetriNetUnfolderBase]: 1623/2499 cut-off events. [2024-06-27 21:35:51,405 INFO L125 PetriNetUnfolderBase]: For 37839/37839 co-relation queries the response was YES. [2024-06-27 21:35:51,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13497 conditions, 2499 events. 1623/2499 cut-off events. For 37839/37839 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12481 event pairs, 461 based on Foata normal form. 4/2502 useless extension candidates. Maximal degree in co-relation 13453. Up to 1989 conditions per place. [2024-06-27 21:35:51,419 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 74 changer transitions 0/174 dead transitions. [2024-06-27 21:35:51,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 1773 flow [2024-06-27 21:35:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:35:51,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:35:51,421 INFO L175 Difference]: Start difference. First operand has 102 places, 129 transitions, 1036 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:35:51,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 1773 flow [2024-06-27 21:35:51,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1684 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:51,460 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1251 flow [2024-06-27 21:35:51,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1251, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-27 21:35:51,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-27 21:35:51,461 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1251 flow [2024-06-27 21:35:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:51,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:35:51,462 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)] === [2024-06-27 21:35:51,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1358104970, now seen corresponding path program 4 times [2024-06-27 21:35:51,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:51,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795545818] [2024-06-27 21:35:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:51,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:52,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795545818] [2024-06-27 21:35:52,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795545818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:52,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:52,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439036374] [2024-06-27 21:35:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:52,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:52,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1251 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:52,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:52,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:52,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:52,703 INFO L124 PetriNetUnfolderBase]: 1613/2489 cut-off events. [2024-06-27 21:35:52,703 INFO L125 PetriNetUnfolderBase]: For 38972/38972 co-relation queries the response was YES. [2024-06-27 21:35:52,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13748 conditions, 2489 events. 1613/2489 cut-off events. For 38972/38972 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12402 event pairs, 478 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 13704. Up to 1981 conditions per place. [2024-06-27 21:35:52,719 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 73 changer transitions 0/171 dead transitions. [2024-06-27 21:35:52,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 171 transitions, 1769 flow [2024-06-27 21:35:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:35:52,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:35:52,720 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1251 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:35:52,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 171 transitions, 1769 flow [2024-06-27 21:35:52,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 171 transitions, 1667 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:52,774 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1303 flow [2024-06-27 21:35:52,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1303, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-27 21:35:52,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 21:35:52,775 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1303 flow [2024-06-27 21:35:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:52,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:52,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:35:52,776 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)] === [2024-06-27 21:35:52,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1571248508, now seen corresponding path program 1 times [2024-06-27 21:35:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:52,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933033028] [2024-06-27 21:35:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:53,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:53,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933033028] [2024-06-27 21:35:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933033028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:53,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576557415] [2024-06-27 21:35:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:53,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:53,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1303 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:35:53,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:53,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:53,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:54,352 INFO L124 PetriNetUnfolderBase]: 1630/2514 cut-off events. [2024-06-27 21:35:54,353 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-27 21:35:54,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13974 conditions, 2514 events. 1630/2514 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12540 event pairs, 485 based on Foata normal form. 4/2517 useless extension candidates. Maximal degree in co-relation 13928. Up to 2216 conditions per place. [2024-06-27 21:35:54,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-27 21:35:54,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1783 flow [2024-06-27 21:35:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:35:54,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:35:54,369 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1303 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:35:54,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1783 flow [2024-06-27 21:35:54,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 171 transitions, 1633 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:54,416 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1296 flow [2024-06-27 21:35:54,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1296, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-27 21:35:54,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-27 21:35:54,417 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1296 flow [2024-06-27 21:35:54,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:35:54,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:54,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:54,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:35:54,418 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)] === [2024-06-27 21:35:54,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1625009217, now seen corresponding path program 1 times [2024-06-27 21:35:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:54,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64308605] [2024-06-27 21:35:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:54,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:54,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64308605] [2024-06-27 21:35:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64308605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:54,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:35:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348168665] [2024-06-27 21:35:54,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:35:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:35:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:35:55,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:55,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:55,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:55,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:55,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:55,379 INFO L124 PetriNetUnfolderBase]: 1514/2402 cut-off events. [2024-06-27 21:35:55,379 INFO L125 PetriNetUnfolderBase]: For 45019/45029 co-relation queries the response was YES. [2024-06-27 21:35:55,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13600 conditions, 2402 events. 1514/2402 cut-off events. For 45019/45029 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12213 event pairs, 511 based on Foata normal form. 2/2386 useless extension candidates. Maximal degree in co-relation 13553. Up to 2171 conditions per place. [2024-06-27 21:35:55,396 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 119 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-27 21:35:55,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 158 transitions, 1658 flow [2024-06-27 21:35:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:35:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:35:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:35:55,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:35:55,397 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1296 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:35:55,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 158 transitions, 1658 flow [2024-06-27 21:35:55,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1537 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:55,458 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1256 flow [2024-06-27 21:35:55,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1256, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-27 21:35:55,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-27 21:35:55,459 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1256 flow [2024-06-27 21:35:55,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:55,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:55,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:55,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:35:55,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:55,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash 46241630, now seen corresponding path program 5 times [2024-06-27 21:35:55,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139941879] [2024-06-27 21:35:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:56,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:56,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139941879] [2024-06-27 21:35:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139941879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:56,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:56,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091878513] [2024-06-27 21:35:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:56,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:56,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:56,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:56,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:56,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:56,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:56,862 INFO L124 PetriNetUnfolderBase]: 1694/2614 cut-off events. [2024-06-27 21:35:56,862 INFO L125 PetriNetUnfolderBase]: For 50562/50562 co-relation queries the response was YES. [2024-06-27 21:35:56,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14816 conditions, 2614 events. 1694/2614 cut-off events. For 50562/50562 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13192 event pairs, 468 based on Foata normal form. 4/2615 useless extension candidates. Maximal degree in co-relation 14768. Up to 2068 conditions per place. [2024-06-27 21:35:56,880 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 102 selfloop transitions, 76 changer transitions 0/183 dead transitions. [2024-06-27 21:35:56,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 2000 flow [2024-06-27 21:35:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:35:56,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 21:35:56,882 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1256 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:35:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 2000 flow [2024-06-27 21:35:56,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 1957 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:56,929 INFO L231 Difference]: Finished difference. Result has 114 places, 149 transitions, 1480 flow [2024-06-27 21:35:56,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1480, PETRI_PLACES=114, PETRI_TRANSITIONS=149} [2024-06-27 21:35:56,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 21:35:56,930 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 149 transitions, 1480 flow [2024-06-27 21:35:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:56,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:56,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:56,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:35:56,930 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)] === [2024-06-27 21:35:56,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:56,931 INFO L85 PathProgramCache]: Analyzing trace with hash 302742140, now seen corresponding path program 6 times [2024-06-27 21:35:56,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:56,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91689827] [2024-06-27 21:35:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:56,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:57,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91689827] [2024-06-27 21:35:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91689827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675210771] [2024-06-27 21:35:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:57,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:57,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 149 transitions, 1480 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:57,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:57,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:57,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:58,280 INFO L124 PetriNetUnfolderBase]: 1684/2596 cut-off events. [2024-06-27 21:35:58,280 INFO L125 PetriNetUnfolderBase]: For 54362/54362 co-relation queries the response was YES. [2024-06-27 21:35:58,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 2596 events. 1684/2596 cut-off events. For 54362/54362 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13060 event pairs, 461 based on Foata normal form. 4/2597 useless extension candidates. Maximal degree in co-relation 15076. Up to 2060 conditions per place. [2024-06-27 21:35:58,295 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 81 changer transitions 0/180 dead transitions. [2024-06-27 21:35:58,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 2029 flow [2024-06-27 21:35:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:35:58,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:35:58,296 INFO L175 Difference]: Start difference. First operand has 114 places, 149 transitions, 1480 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:35:58,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 2029 flow [2024-06-27 21:35:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 1734 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:58,350 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1356 flow [2024-06-27 21:35:58,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1356, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-27 21:35:58,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 21:35:58,350 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1356 flow [2024-06-27 21:35:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:58,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:58,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:58,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:35:58,351 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)] === [2024-06-27 21:35:58,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1686856468, now seen corresponding path program 7 times [2024-06-27 21:35:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789519381] [2024-06-27 21:35:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:58,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:58,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789519381] [2024-06-27 21:35:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789519381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:58,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:58,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616111010] [2024-06-27 21:35:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:58,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:59,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:35:59,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1356 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:59,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:59,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:35:59,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:59,738 INFO L124 PetriNetUnfolderBase]: 1674/2588 cut-off events. [2024-06-27 21:35:59,738 INFO L125 PetriNetUnfolderBase]: For 55098/55098 co-relation queries the response was YES. [2024-06-27 21:35:59,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14834 conditions, 2588 events. 1674/2588 cut-off events. For 55098/55098 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13048 event pairs, 472 based on Foata normal form. 4/2589 useless extension candidates. Maximal degree in co-relation 14785. Up to 2052 conditions per place. [2024-06-27 21:35:59,755 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 79 changer transitions 0/177 dead transitions. [2024-06-27 21:35:59,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1804 flow [2024-06-27 21:35:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:35:59,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:35:59,757 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1356 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:35:59,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1804 flow [2024-06-27 21:35:59,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1602 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:59,821 INFO L231 Difference]: Finished difference. Result has 116 places, 149 transitions, 1320 flow [2024-06-27 21:35:59,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=116, PETRI_TRANSITIONS=149} [2024-06-27 21:35:59,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 21:35:59,822 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 149 transitions, 1320 flow [2024-06-27 21:35:59,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:59,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:59,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:59,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:35:59,822 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)] === [2024-06-27 21:35:59,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1654426796, now seen corresponding path program 2 times [2024-06-27 21:35:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:59,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474253902] [2024-06-27 21:35:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:59,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:00,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:00,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474253902] [2024-06-27 21:36:00,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474253902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:00,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:00,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754456769] [2024-06-27 21:36:00,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:00,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:00,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:00,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:00,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:00,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 149 transitions, 1320 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:00,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:00,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:00,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:01,385 INFO L124 PetriNetUnfolderBase]: 1691/2624 cut-off events. [2024-06-27 21:36:01,385 INFO L125 PetriNetUnfolderBase]: For 59036/59036 co-relation queries the response was YES. [2024-06-27 21:36:01,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 2624 events. 1691/2624 cut-off events. For 59036/59036 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13321 event pairs, 479 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 15037. Up to 2312 conditions per place. [2024-06-27 21:36:01,400 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 123 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-06-27 21:36:01,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1810 flow [2024-06-27 21:36:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:36:01,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:36:01,401 INFO L175 Difference]: Start difference. First operand has 116 places, 149 transitions, 1320 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:36:01,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1810 flow [2024-06-27 21:36:01,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 1641 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:01,447 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1299 flow [2024-06-27 21:36:01,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-27 21:36:01,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-27 21:36:01,447 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1299 flow [2024-06-27 21:36:01,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:01,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:01,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:01,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:36:01,448 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)] === [2024-06-27 21:36:01,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash 197297010, now seen corresponding path program 3 times [2024-06-27 21:36:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:01,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408768281] [2024-06-27 21:36:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:01,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408768281] [2024-06-27 21:36:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408768281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:02,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17264257] [2024-06-27 21:36:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:02,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:02,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:02,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1299 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:02,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:02,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:02,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:03,119 INFO L124 PetriNetUnfolderBase]: 1708/2651 cut-off events. [2024-06-27 21:36:03,120 INFO L125 PetriNetUnfolderBase]: For 63973/63973 co-relation queries the response was YES. [2024-06-27 21:36:03,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15444 conditions, 2651 events. 1708/2651 cut-off events. For 63973/63973 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13526 event pairs, 452 based on Foata normal form. 4/2654 useless extension candidates. Maximal degree in co-relation 15393. Up to 2245 conditions per place. [2024-06-27 21:36:03,137 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/185 dead transitions. [2024-06-27 21:36:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 185 transitions, 1943 flow [2024-06-27 21:36:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:36:03,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:36:03,138 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1299 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:36:03,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 185 transitions, 1943 flow [2024-06-27 21:36:03,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1815 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:03,199 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1374 flow [2024-06-27 21:36:03,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1374, PETRI_PLACES=119, PETRI_TRANSITIONS=155} [2024-06-27 21:36:03,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 21:36:03,200 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1374 flow [2024-06-27 21:36:03,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:03,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:03,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:36:03,201 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:03,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1565628872, now seen corresponding path program 4 times [2024-06-27 21:36:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094358510] [2024-06-27 21:36:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:04,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:04,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094358510] [2024-06-27 21:36:04,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094358510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:04,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:04,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632773671] [2024-06-27 21:36:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:04,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:04,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:04,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:04,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 155 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:04,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:04,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:04,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:04,673 INFO L124 PetriNetUnfolderBase]: 1700/2641 cut-off events. [2024-06-27 21:36:04,673 INFO L125 PetriNetUnfolderBase]: For 67754/67754 co-relation queries the response was YES. [2024-06-27 21:36:04,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15580 conditions, 2641 events. 1700/2641 cut-off events. For 67754/67754 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13435 event pairs, 483 based on Foata normal form. 4/2644 useless extension candidates. Maximal degree in co-relation 15528. Up to 2327 conditions per place. [2024-06-27 21:36:04,732 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 49 changer transitions 0/183 dead transitions. [2024-06-27 21:36:04,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 1832 flow [2024-06-27 21:36:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:36:04,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:36:04,734 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1374 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:36:04,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 1832 flow [2024-06-27 21:36:04,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 183 transitions, 1718 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:04,797 INFO L231 Difference]: Finished difference. Result has 123 places, 155 transitions, 1366 flow [2024-06-27 21:36:04,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=123, PETRI_TRANSITIONS=155} [2024-06-27 21:36:04,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-27 21:36:04,798 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 155 transitions, 1366 flow [2024-06-27 21:36:04,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:04,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:04,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:36:04,799 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)] === [2024-06-27 21:36:04,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1637389377, now seen corresponding path program 2 times [2024-06-27 21:36:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:04,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025569879] [2024-06-27 21:36:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:04,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:05,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025569879] [2024-06-27 21:36:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025569879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:05,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:05,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:05,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808449077] [2024-06-27 21:36:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:05,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:05,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 155 transitions, 1366 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:05,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:05,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:05,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:05,775 INFO L124 PetriNetUnfolderBase]: 1540/2455 cut-off events. [2024-06-27 21:36:05,775 INFO L125 PetriNetUnfolderBase]: For 68727/68739 co-relation queries the response was YES. [2024-06-27 21:36:05,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14526 conditions, 2455 events. 1540/2455 cut-off events. For 68727/68739 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12632 event pairs, 515 based on Foata normal form. 5/2438 useless extension candidates. Maximal degree in co-relation 14472. Up to 2192 conditions per place. [2024-06-27 21:36:05,791 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-06-27 21:36:05,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 165 transitions, 1686 flow [2024-06-27 21:36:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:36:05,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:36:05,792 INFO L175 Difference]: Start difference. First operand has 123 places, 155 transitions, 1366 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:36:05,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 165 transitions, 1686 flow [2024-06-27 21:36:05,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 165 transitions, 1556 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:05,876 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1296 flow [2024-06-27 21:36:05,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1296, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-27 21:36:05,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 21:36:05,877 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1296 flow [2024-06-27 21:36:05,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:05,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:05,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:05,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:36:05,877 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)] === [2024-06-27 21:36:05,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1631682401, now seen corresponding path program 1 times [2024-06-27 21:36:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:05,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024727841] [2024-06-27 21:36:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:05,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:06,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:06,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024727841] [2024-06-27 21:36:06,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024727841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:06,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:06,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191610888] [2024-06-27 21:36:06,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:06,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:06,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:06,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:06,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:06,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:06,772 INFO L124 PetriNetUnfolderBase]: 1689/2630 cut-off events. [2024-06-27 21:36:06,772 INFO L125 PetriNetUnfolderBase]: For 72420/72420 co-relation queries the response was YES. [2024-06-27 21:36:06,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15572 conditions, 2630 events. 1689/2630 cut-off events. For 72420/72420 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13370 event pairs, 542 based on Foata normal form. 1/2631 useless extension candidates. Maximal degree in co-relation 15517. Up to 2503 conditions per place. [2024-06-27 21:36:06,787 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 154 selfloop transitions, 11 changer transitions 0/170 dead transitions. [2024-06-27 21:36:06,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1702 flow [2024-06-27 21:36:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:36:06,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:36:06,788 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1296 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:36:06,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1702 flow [2024-06-27 21:36:06,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 170 transitions, 1631 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:06,863 INFO L231 Difference]: Finished difference. Result has 123 places, 158 transitions, 1289 flow [2024-06-27 21:36:06,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1289, PETRI_PLACES=123, PETRI_TRANSITIONS=158} [2024-06-27 21:36:06,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-27 21:36:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 158 transitions, 1289 flow [2024-06-27 21:36:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:06,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:36:06,864 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)] === [2024-06-27 21:36:06,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1637396321, now seen corresponding path program 2 times [2024-06-27 21:36:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:06,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686883633] [2024-06-27 21:36:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686883633] [2024-06-27 21:36:07,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686883633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:07,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599865460] [2024-06-27 21:36:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:07,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:07,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:07,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 158 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:07,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:07,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:07,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:07,944 INFO L124 PetriNetUnfolderBase]: 1686/2627 cut-off events. [2024-06-27 21:36:07,944 INFO L125 PetriNetUnfolderBase]: For 76166/76168 co-relation queries the response was YES. [2024-06-27 21:36:07,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15840 conditions, 2627 events. 1686/2627 cut-off events. For 76166/76168 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13388 event pairs, 546 based on Foata normal form. 3/2630 useless extension candidates. Maximal degree in co-relation 15784. Up to 2493 conditions per place. [2024-06-27 21:36:07,959 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-27 21:36:07,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 170 transitions, 1687 flow [2024-06-27 21:36:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:36:07,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-27 21:36:07,961 INFO L175 Difference]: Start difference. First operand has 123 places, 158 transitions, 1289 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:36:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 170 transitions, 1687 flow [2024-06-27 21:36:08,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 170 transitions, 1645 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:08,030 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1327 flow [2024-06-27 21:36:08,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1327, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-27 21:36:08,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:36:08,031 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1327 flow [2024-06-27 21:36:08,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:08,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:08,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:08,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:36:08,031 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)] === [2024-06-27 21:36:08,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1466220949, now seen corresponding path program 1 times [2024-06-27 21:36:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:08,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176259296] [2024-06-27 21:36:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176259296] [2024-06-27 21:36:08,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176259296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:08,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:08,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576564885] [2024-06-27 21:36:08,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:08,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:08,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:08,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:08,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:08,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:08,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:09,194 INFO L124 PetriNetUnfolderBase]: 1560/2483 cut-off events. [2024-06-27 21:36:09,194 INFO L125 PetriNetUnfolderBase]: For 79373/79385 co-relation queries the response was YES. [2024-06-27 21:36:09,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 2483 events. 1560/2483 cut-off events. For 79373/79385 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12785 event pairs, 512 based on Foata normal form. 4/2465 useless extension candidates. Maximal degree in co-relation 15285. Up to 2189 conditions per place. [2024-06-27 21:36:09,214 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-27 21:36:09,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 176 transitions, 1715 flow [2024-06-27 21:36:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:36:09,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:36:09,216 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1327 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:36:09,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 176 transitions, 1715 flow [2024-06-27 21:36:09,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 1657 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:09,303 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1390 flow [2024-06-27 21:36:09,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1390, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2024-06-27 21:36:09,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-27 21:36:09,304 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1390 flow [2024-06-27 21:36:09,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:09,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:09,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:09,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:36:09,304 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:09,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -572851680, now seen corresponding path program 1 times [2024-06-27 21:36:09,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:09,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487551499] [2024-06-27 21:36:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:09,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:09,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487551499] [2024-06-27 21:36:09,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487551499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:09,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:09,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:09,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330628490] [2024-06-27 21:36:09,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:09,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:09,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:10,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:10,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 1390 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:10,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:10,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:10,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:10,674 INFO L124 PetriNetUnfolderBase]: 1735/2705 cut-off events. [2024-06-27 21:36:10,675 INFO L125 PetriNetUnfolderBase]: For 87783/87783 co-relation queries the response was YES. [2024-06-27 21:36:10,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 2705 events. 1735/2705 cut-off events. For 87783/87783 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13858 event pairs, 366 based on Foata normal form. 4/2709 useless extension candidates. Maximal degree in co-relation 17274. Up to 2430 conditions per place. [2024-06-27 21:36:10,691 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 31 changer transitions 0/206 dead transitions. [2024-06-27 21:36:10,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 206 transitions, 2129 flow [2024-06-27 21:36:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:36:10,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 21:36:10,693 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1390 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:36:10,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 206 transitions, 2129 flow [2024-06-27 21:36:10,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 206 transitions, 2036 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:10,775 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1458 flow [2024-06-27 21:36:10,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1458, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-27 21:36:10,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 21:36:10,776 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1458 flow [2024-06-27 21:36:10,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:10,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:10,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:36:10,776 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:10,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1129353310, now seen corresponding path program 2 times [2024-06-27 21:36:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698045074] [2024-06-27 21:36:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:11,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:11,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698045074] [2024-06-27 21:36:11,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698045074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:11,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:11,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:11,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37469242] [2024-06-27 21:36:11,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:11,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:11,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1458 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:11,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:11,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:11,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:12,055 INFO L124 PetriNetUnfolderBase]: 1727/2693 cut-off events. [2024-06-27 21:36:12,056 INFO L125 PetriNetUnfolderBase]: For 91962/91962 co-relation queries the response was YES. [2024-06-27 21:36:12,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17429 conditions, 2693 events. 1727/2693 cut-off events. For 91962/91962 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13752 event pairs, 487 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17370. Up to 2483 conditions per place. [2024-06-27 21:36:12,077 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 27 changer transitions 0/199 dead transitions. [2024-06-27 21:36:12,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 199 transitions, 1963 flow [2024-06-27 21:36:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:36:12,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:36:12,078 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1458 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:36:12,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 199 transitions, 1963 flow [2024-06-27 21:36:12,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 199 transitions, 1854 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:12,207 INFO L231 Difference]: Finished difference. Result has 135 places, 169 transitions, 1412 flow [2024-06-27 21:36:12,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=169} [2024-06-27 21:36:12,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 21:36:12,208 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 169 transitions, 1412 flow [2024-06-27 21:36:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:12,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:12,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:12,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:36:12,208 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)] === [2024-06-27 21:36:12,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1014062140, now seen corresponding path program 3 times [2024-06-27 21:36:12,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:12,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245866634] [2024-06-27 21:36:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:12,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:12,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245866634] [2024-06-27 21:36:12,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245866634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:12,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:12,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322299472] [2024-06-27 21:36:12,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:12,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:12,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 169 transitions, 1412 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:13,529 INFO L124 PetriNetUnfolderBase]: 1744/2717 cut-off events. [2024-06-27 21:36:13,530 INFO L125 PetriNetUnfolderBase]: For 97981/97983 co-relation queries the response was YES. [2024-06-27 21:36:13,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17659 conditions, 2717 events. 1744/2717 cut-off events. For 97981/97983 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13900 event pairs, 478 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 17598. Up to 2449 conditions per place. [2024-06-27 21:36:13,548 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-06-27 21:36:13,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 1967 flow [2024-06-27 21:36:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:36:13,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:36:13,550 INFO L175 Difference]: Start difference. First operand has 135 places, 169 transitions, 1412 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:36:13,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 1967 flow [2024-06-27 21:36:13,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 200 transitions, 1907 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:13,677 INFO L231 Difference]: Finished difference. Result has 136 places, 171 transitions, 1499 flow [2024-06-27 21:36:13,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1499, PETRI_PLACES=136, PETRI_TRANSITIONS=171} [2024-06-27 21:36:13,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 21:36:13,678 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 171 transitions, 1499 flow [2024-06-27 21:36:13,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:13,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:13,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:36:13,679 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)] === [2024-06-27 21:36:13,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash -165771132, now seen corresponding path program 4 times [2024-06-27 21:36:13,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:13,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151527067] [2024-06-27 21:36:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:13,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:14,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151527067] [2024-06-27 21:36:14,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151527067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:14,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:14,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467973339] [2024-06-27 21:36:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:14,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:14,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:14,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:14,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 171 transitions, 1499 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:14,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:14,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:14,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:14,900 INFO L124 PetriNetUnfolderBase]: 1736/2696 cut-off events. [2024-06-27 21:36:14,901 INFO L125 PetriNetUnfolderBase]: For 102141/102141 co-relation queries the response was YES. [2024-06-27 21:36:14,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2696 events. 1736/2696 cut-off events. For 102141/102141 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13703 event pairs, 480 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17724. Up to 2437 conditions per place. [2024-06-27 21:36:14,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 43 changer transitions 0/200 dead transitions. [2024-06-27 21:36:14,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 200 transitions, 2050 flow [2024-06-27 21:36:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:36:14,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 21:36:14,922 INFO L175 Difference]: Start difference. First operand has 136 places, 171 transitions, 1499 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:36:14,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 200 transitions, 2050 flow [2024-06-27 21:36:15,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 200 transitions, 1921 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:15,030 INFO L231 Difference]: Finished difference. Result has 138 places, 173 transitions, 1519 flow [2024-06-27 21:36:15,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=138, PETRI_TRANSITIONS=173} [2024-06-27 21:36:15,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-27 21:36:15,031 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 173 transitions, 1519 flow [2024-06-27 21:36:15,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:15,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:15,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:15,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:36:15,032 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:15,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1708796360, now seen corresponding path program 1 times [2024-06-27 21:36:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742666221] [2024-06-27 21:36:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:15,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:15,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742666221] [2024-06-27 21:36:15,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742666221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:15,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:15,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536319856] [2024-06-27 21:36:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:15,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:15,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:15,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 173 transitions, 1519 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:15,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:15,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:15,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:16,083 INFO L124 PetriNetUnfolderBase]: 1746/2718 cut-off events. [2024-06-27 21:36:16,083 INFO L125 PetriNetUnfolderBase]: For 106900/106900 co-relation queries the response was YES. [2024-06-27 21:36:16,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18026 conditions, 2718 events. 1746/2718 cut-off events. For 106900/106900 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13858 event pairs, 475 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 17963. Up to 2571 conditions per place. [2024-06-27 21:36:16,102 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-27 21:36:16,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 2020 flow [2024-06-27 21:36:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:36:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 21:36:16,103 INFO L175 Difference]: Start difference. First operand has 138 places, 173 transitions, 1519 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:36:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 2020 flow [2024-06-27 21:36:16,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 196 transitions, 1889 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:16,208 INFO L231 Difference]: Finished difference. Result has 140 places, 179 transitions, 1495 flow [2024-06-27 21:36:16,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=140, PETRI_TRANSITIONS=179} [2024-06-27 21:36:16,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 21:36:16,208 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 179 transitions, 1495 flow [2024-06-27 21:36:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:16,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:16,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:36:16,209 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:16,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash -957451942, now seen corresponding path program 1 times [2024-06-27 21:36:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892420996] [2024-06-27 21:36:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:16,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:16,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892420996] [2024-06-27 21:36:16,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892420996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:16,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:16,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:16,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520359880] [2024-06-27 21:36:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:16,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:16,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:16,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:16,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 179 transitions, 1495 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:16,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:16,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:17,219 INFO L124 PetriNetUnfolderBase]: 1774/2740 cut-off events. [2024-06-27 21:36:17,220 INFO L125 PetriNetUnfolderBase]: For 112618/112618 co-relation queries the response was YES. [2024-06-27 21:36:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18677 conditions, 2740 events. 1774/2740 cut-off events. For 112618/112618 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13841 event pairs, 464 based on Foata normal form. 2/2741 useless extension candidates. Maximal degree in co-relation 18612. Up to 2555 conditions per place. [2024-06-27 21:36:17,240 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-27 21:36:17,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 203 transitions, 2131 flow [2024-06-27 21:36:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:36:17,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 21:36:17,241 INFO L175 Difference]: Start difference. First operand has 140 places, 179 transitions, 1495 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:36:17,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 203 transitions, 2131 flow [2024-06-27 21:36:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 203 transitions, 2081 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:17,338 INFO L231 Difference]: Finished difference. Result has 145 places, 187 transitions, 1652 flow [2024-06-27 21:36:17,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1652, PETRI_PLACES=145, PETRI_TRANSITIONS=187} [2024-06-27 21:36:17,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 21:36:17,338 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 187 transitions, 1652 flow [2024-06-27 21:36:17,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:17,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:17,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:36:17,339 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:17,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1708916330, now seen corresponding path program 2 times [2024-06-27 21:36:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:17,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536844908] [2024-06-27 21:36:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:17,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:17,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536844908] [2024-06-27 21:36:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536844908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:17,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881650776] [2024-06-27 21:36:17,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:17,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:17,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:17,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 187 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:17,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:17,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:17,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:18,384 INFO L124 PetriNetUnfolderBase]: 1792/2768 cut-off events. [2024-06-27 21:36:18,384 INFO L125 PetriNetUnfolderBase]: For 121814/121814 co-relation queries the response was YES. [2024-06-27 21:36:18,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19533 conditions, 2768 events. 1792/2768 cut-off events. For 121814/121814 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13961 event pairs, 481 based on Foata normal form. 2/2770 useless extension candidates. Maximal degree in co-relation 19466. Up to 2622 conditions per place. [2024-06-27 21:36:18,404 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-27 21:36:18,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 2288 flow [2024-06-27 21:36:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:36:18,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 21:36:18,405 INFO L175 Difference]: Start difference. First operand has 145 places, 187 transitions, 1652 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:36:18,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 2288 flow [2024-06-27 21:36:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 209 transitions, 2193 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:18,535 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 1713 flow [2024-06-27 21:36:18,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1713, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-27 21:36:18,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 21:36:18,536 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 1713 flow [2024-06-27 21:36:18,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:18,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:18,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:18,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:36:18,537 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:18,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -780083272, now seen corresponding path program 2 times [2024-06-27 21:36:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:18,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325257757] [2024-06-27 21:36:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325257757] [2024-06-27 21:36:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325257757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642243887] [2024-06-27 21:36:19,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:19,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:19,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 1713 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:19,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:19,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:19,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:19,505 INFO L124 PetriNetUnfolderBase]: 1810/2792 cut-off events. [2024-06-27 21:36:19,505 INFO L125 PetriNetUnfolderBase]: For 129473/129477 co-relation queries the response was YES. [2024-06-27 21:36:19,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20104 conditions, 2792 events. 1810/2792 cut-off events. For 129473/129477 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14076 event pairs, 475 based on Foata normal form. 6/2797 useless extension candidates. Maximal degree in co-relation 20035. Up to 2548 conditions per place. [2024-06-27 21:36:19,582 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 53 changer transitions 0/225 dead transitions. [2024-06-27 21:36:19,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 225 transitions, 2587 flow [2024-06-27 21:36:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:36:19,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:36:19,583 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 1713 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:36:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 225 transitions, 2587 flow [2024-06-27 21:36:19,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 225 transitions, 2525 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:19,747 INFO L231 Difference]: Finished difference. Result has 155 places, 210 transitions, 2057 flow [2024-06-27 21:36:19,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2057, PETRI_PLACES=155, PETRI_TRANSITIONS=210} [2024-06-27 21:36:19,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 21:36:19,748 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 210 transitions, 2057 flow [2024-06-27 21:36:19,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:19,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:19,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:19,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:36:19,748 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)] === [2024-06-27 21:36:19,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:19,749 INFO L85 PathProgramCache]: Analyzing trace with hash -780320608, now seen corresponding path program 3 times [2024-06-27 21:36:19,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:19,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319362011] [2024-06-27 21:36:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:19,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:20,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:20,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319362011] [2024-06-27 21:36:20,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319362011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:20,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:20,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:20,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936364531] [2024-06-27 21:36:20,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:20,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:20,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:20,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:20,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 210 transitions, 2057 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:20,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:20,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:20,818 INFO L124 PetriNetUnfolderBase]: 1804/2789 cut-off events. [2024-06-27 21:36:20,818 INFO L125 PetriNetUnfolderBase]: For 137348/137350 co-relation queries the response was YES. [2024-06-27 21:36:20,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20724 conditions, 2789 events. 1804/2789 cut-off events. For 137348/137350 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14144 event pairs, 491 based on Foata normal form. 2/2791 useless extension candidates. Maximal degree in co-relation 20651. Up to 2627 conditions per place. [2024-06-27 21:36:20,840 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 31 changer transitions 0/226 dead transitions. [2024-06-27 21:36:20,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2679 flow [2024-06-27 21:36:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:36:20,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 21:36:20,841 INFO L175 Difference]: Start difference. First operand has 155 places, 210 transitions, 2057 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:36:20,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2679 flow [2024-06-27 21:36:20,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 226 transitions, 2564 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:20,989 INFO L231 Difference]: Finished difference. Result has 160 places, 213 transitions, 2074 flow [2024-06-27 21:36:20,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2074, PETRI_PLACES=160, PETRI_TRANSITIONS=213} [2024-06-27 21:36:20,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-27 21:36:20,990 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 213 transitions, 2074 flow [2024-06-27 21:36:20,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:20,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:20,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:20,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:36:20,991 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)] === [2024-06-27 21:36:20,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash -780320422, now seen corresponding path program 3 times [2024-06-27 21:36:20,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:20,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7836107] [2024-06-27 21:36:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:20,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:21,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:21,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7836107] [2024-06-27 21:36:21,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7836107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:21,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852702051] [2024-06-27 21:36:21,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:21,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:21,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 213 transitions, 2074 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:21,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:21,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:21,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:21,985 INFO L124 PetriNetUnfolderBase]: 1800/2779 cut-off events. [2024-06-27 21:36:21,986 INFO L125 PetriNetUnfolderBase]: For 140263/140267 co-relation queries the response was YES. [2024-06-27 21:36:21,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 2779 events. 1800/2779 cut-off events. For 140263/140267 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14111 event pairs, 474 based on Foata normal form. 6/2784 useless extension candidates. Maximal degree in co-relation 20617. Up to 2538 conditions per place. [2024-06-27 21:36:22,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-27 21:36:22,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2762 flow [2024-06-27 21:36:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:36:22,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:36:22,010 INFO L175 Difference]: Start difference. First operand has 160 places, 213 transitions, 2074 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:36:22,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2762 flow [2024-06-27 21:36:22,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 230 transitions, 2614 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:22,166 INFO L231 Difference]: Finished difference. Result has 163 places, 217 transitions, 2096 flow [2024-06-27 21:36:22,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2096, PETRI_PLACES=163, PETRI_TRANSITIONS=217} [2024-06-27 21:36:22,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 21:36:22,167 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 217 transitions, 2096 flow [2024-06-27 21:36:22,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:22,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:22,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:22,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:36:22,168 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:22,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash -780074344, now seen corresponding path program 1 times [2024-06-27 21:36:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:22,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382459738] [2024-06-27 21:36:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:22,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:22,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382459738] [2024-06-27 21:36:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382459738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:22,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:22,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:22,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89092914] [2024-06-27 21:36:22,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:22,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:22,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:22,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:22,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 217 transitions, 2096 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:22,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:22,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:22,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:23,425 INFO L124 PetriNetUnfolderBase]: 1713/2692 cut-off events. [2024-06-27 21:36:23,425 INFO L125 PetriNetUnfolderBase]: For 151924/151941 co-relation queries the response was YES. [2024-06-27 21:36:23,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20026 conditions, 2692 events. 1713/2692 cut-off events. For 151924/151941 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13709 event pairs, 455 based on Foata normal form. 13/2675 useless extension candidates. Maximal degree in co-relation 19949. Up to 2356 conditions per place. [2024-06-27 21:36:23,449 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 40 changer transitions 0/235 dead transitions. [2024-06-27 21:36:23,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 235 transitions, 2612 flow [2024-06-27 21:36:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:36:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:36:23,451 INFO L175 Difference]: Start difference. First operand has 163 places, 217 transitions, 2096 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:36:23,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 235 transitions, 2612 flow [2024-06-27 21:36:23,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 235 transitions, 2530 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:23,613 INFO L231 Difference]: Finished difference. Result has 168 places, 219 transitions, 2148 flow [2024-06-27 21:36:23,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2148, PETRI_PLACES=168, PETRI_TRANSITIONS=219} [2024-06-27 21:36:23,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 21:36:23,614 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 219 transitions, 2148 flow [2024-06-27 21:36:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:23,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:36:23,614 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)] === [2024-06-27 21:36:23,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash -509553147, now seen corresponding path program 1 times [2024-06-27 21:36:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:23,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099901087] [2024-06-27 21:36:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:24,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:24,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099901087] [2024-06-27 21:36:24,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099901087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:24,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:24,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613599197] [2024-06-27 21:36:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:24,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:24,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 219 transitions, 2148 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:24,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:24,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:24,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:25,107 INFO L124 PetriNetUnfolderBase]: 2000/3114 cut-off events. [2024-06-27 21:36:25,107 INFO L125 PetriNetUnfolderBase]: For 181115/181115 co-relation queries the response was YES. [2024-06-27 21:36:25,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23640 conditions, 3114 events. 2000/3114 cut-off events. For 181115/181115 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16389 event pairs, 392 based on Foata normal form. 16/3130 useless extension candidates. Maximal degree in co-relation 23562. Up to 2519 conditions per place. [2024-06-27 21:36:25,131 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 39 changer transitions 0/270 dead transitions. [2024-06-27 21:36:25,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 270 transitions, 3100 flow [2024-06-27 21:36:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:36:25,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 21:36:25,133 INFO L175 Difference]: Start difference. First operand has 168 places, 219 transitions, 2148 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:36:25,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 270 transitions, 3100 flow [2024-06-27 21:36:25,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 270 transitions, 2994 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:25,309 INFO L231 Difference]: Finished difference. Result has 172 places, 221 transitions, 2200 flow [2024-06-27 21:36:25,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2200, PETRI_PLACES=172, PETRI_TRANSITIONS=221} [2024-06-27 21:36:25,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 21:36:25,310 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 221 transitions, 2200 flow [2024-06-27 21:36:25,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:25,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:25,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:25,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:36:25,310 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)] === [2024-06-27 21:36:25,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:25,310 INFO L85 PathProgramCache]: Analyzing trace with hash -650209709, now seen corresponding path program 2 times [2024-06-27 21:36:25,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:25,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462454524] [2024-06-27 21:36:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:26,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462454524] [2024-06-27 21:36:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462454524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:26,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:26,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:26,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33702129] [2024-06-27 21:36:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:26,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:26,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:26,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 221 transitions, 2200 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:26,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:26,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:26,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:26,879 INFO L124 PetriNetUnfolderBase]: 2050/3194 cut-off events. [2024-06-27 21:36:26,879 INFO L125 PetriNetUnfolderBase]: For 189230/189230 co-relation queries the response was YES. [2024-06-27 21:36:26,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24191 conditions, 3194 events. 2050/3194 cut-off events. For 189230/189230 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16831 event pairs, 528 based on Foata normal form. 20/3214 useless extension candidates. Maximal degree in co-relation 24112. Up to 2838 conditions per place. [2024-06-27 21:36:26,903 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 35 changer transitions 0/261 dead transitions. [2024-06-27 21:36:26,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 2921 flow [2024-06-27 21:36:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:36:26,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:36:26,904 INFO L175 Difference]: Start difference. First operand has 172 places, 221 transitions, 2200 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:36:26,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 2921 flow [2024-06-27 21:36:27,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 261 transitions, 2844 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:27,101 INFO L231 Difference]: Finished difference. Result has 175 places, 222 transitions, 2244 flow [2024-06-27 21:36:27,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2244, PETRI_PLACES=175, PETRI_TRANSITIONS=222} [2024-06-27 21:36:27,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 21:36:27,102 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 222 transitions, 2244 flow [2024-06-27 21:36:27,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:27,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:27,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:27,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:36:27,102 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)] === [2024-06-27 21:36:27,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:27,103 INFO L85 PathProgramCache]: Analyzing trace with hash -736905239, now seen corresponding path program 3 times [2024-06-27 21:36:27,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:27,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307003283] [2024-06-27 21:36:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:27,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:27,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:27,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307003283] [2024-06-27 21:36:27,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307003283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:27,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:27,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893836023] [2024-06-27 21:36:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:27,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:27,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:27,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:27,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 222 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:27,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:27,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:27,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:28,573 INFO L124 PetriNetUnfolderBase]: 2022/3152 cut-off events. [2024-06-27 21:36:28,573 INFO L125 PetriNetUnfolderBase]: For 183022/183022 co-relation queries the response was YES. [2024-06-27 21:36:28,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23391 conditions, 3152 events. 2022/3152 cut-off events. For 183022/183022 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16617 event pairs, 494 based on Foata normal form. 16/3168 useless extension candidates. Maximal degree in co-relation 23310. Up to 2676 conditions per place. [2024-06-27 21:36:28,603 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/264 dead transitions. [2024-06-27 21:36:28,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 264 transitions, 2950 flow [2024-06-27 21:36:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:36:28,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:36:28,604 INFO L175 Difference]: Start difference. First operand has 175 places, 222 transitions, 2244 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:36:28,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 264 transitions, 2950 flow [2024-06-27 21:36:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 264 transitions, 2855 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:28,863 INFO L231 Difference]: Finished difference. Result has 177 places, 222 transitions, 2227 flow [2024-06-27 21:36:28,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2227, PETRI_PLACES=177, PETRI_TRANSITIONS=222} [2024-06-27 21:36:28,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 21:36:28,863 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 222 transitions, 2227 flow [2024-06-27 21:36:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:28,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:28,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:36:28,864 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)] === [2024-06-27 21:36:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 93720437, now seen corresponding path program 4 times [2024-06-27 21:36:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235236889] [2024-06-27 21:36:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:29,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:29,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235236889] [2024-06-27 21:36:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235236889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:29,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:29,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994568022] [2024-06-27 21:36:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:29,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:29,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 222 transitions, 2227 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:29,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:29,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:29,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:30,347 INFO L124 PetriNetUnfolderBase]: 2097/3284 cut-off events. [2024-06-27 21:36:30,347 INFO L125 PetriNetUnfolderBase]: For 193486/193488 co-relation queries the response was YES. [2024-06-27 21:36:30,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24129 conditions, 3284 events. 2097/3284 cut-off events. For 193486/193488 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17620 event pairs, 492 based on Foata normal form. 20/3304 useless extension candidates. Maximal degree in co-relation 24047. Up to 2619 conditions per place. [2024-06-27 21:36:30,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 82 changer transitions 0/262 dead transitions. [2024-06-27 21:36:30,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 262 transitions, 2951 flow [2024-06-27 21:36:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:36:30,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 21:36:30,376 INFO L175 Difference]: Start difference. First operand has 177 places, 222 transitions, 2227 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:36:30,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 262 transitions, 2951 flow [2024-06-27 21:36:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 262 transitions, 2853 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:36:30,639 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2340 flow [2024-06-27 21:36:30,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2340, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-27 21:36:30,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-27 21:36:30,640 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2340 flow [2024-06-27 21:36:30,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:30,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:30,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:30,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:36:30,640 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:30,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1371154455, now seen corresponding path program 5 times [2024-06-27 21:36:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:30,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177394853] [2024-06-27 21:36:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:31,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:31,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177394853] [2024-06-27 21:36:31,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177394853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:31,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:31,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:31,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335967555] [2024-06-27 21:36:31,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:31,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:31,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:31,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2340 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:31,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:31,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:31,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:32,193 INFO L124 PetriNetUnfolderBase]: 2266/3573 cut-off events. [2024-06-27 21:36:32,193 INFO L125 PetriNetUnfolderBase]: For 220746/220748 co-relation queries the response was YES. [2024-06-27 21:36:32,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26949 conditions, 3573 events. 2266/3573 cut-off events. For 220746/220748 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19660 event pairs, 511 based on Foata normal form. 16/3589 useless extension candidates. Maximal degree in co-relation 26866. Up to 2622 conditions per place. [2024-06-27 21:36:32,227 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-27 21:36:32,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 269 transitions, 3298 flow [2024-06-27 21:36:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:36:32,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 21:36:32,229 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2340 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:36:32,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 269 transitions, 3298 flow [2024-06-27 21:36:32,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 269 transitions, 3113 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:32,547 INFO L231 Difference]: Finished difference. Result has 180 places, 225 transitions, 2413 flow [2024-06-27 21:36:32,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2413, PETRI_PLACES=180, PETRI_TRANSITIONS=225} [2024-06-27 21:36:32,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-27 21:36:32,547 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 225 transitions, 2413 flow [2024-06-27 21:36:32,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:32,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:32,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:32,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:36:32,548 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:32,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 211483585, now seen corresponding path program 6 times [2024-06-27 21:36:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385161303] [2024-06-27 21:36:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:33,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:33,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385161303] [2024-06-27 21:36:33,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385161303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:33,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:33,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832044015] [2024-06-27 21:36:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:33,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:33,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 225 transitions, 2413 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:33,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:34,117 INFO L124 PetriNetUnfolderBase]: 2230/3508 cut-off events. [2024-06-27 21:36:34,118 INFO L125 PetriNetUnfolderBase]: For 213981/213983 co-relation queries the response was YES. [2024-06-27 21:36:34,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25833 conditions, 3508 events. 2230/3508 cut-off events. For 213981/213983 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19184 event pairs, 501 based on Foata normal form. 20/3528 useless extension candidates. Maximal degree in co-relation 25749. Up to 2842 conditions per place. [2024-06-27 21:36:34,154 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 83 changer transitions 0/265 dead transitions. [2024-06-27 21:36:34,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 265 transitions, 3112 flow [2024-06-27 21:36:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:36:34,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:36:34,155 INFO L175 Difference]: Start difference. First operand has 180 places, 225 transitions, 2413 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:36:34,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 265 transitions, 3112 flow [2024-06-27 21:36:34,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 2963 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:34,523 INFO L231 Difference]: Finished difference. Result has 184 places, 225 transitions, 2437 flow [2024-06-27 21:36:34,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2437, PETRI_PLACES=184, PETRI_TRANSITIONS=225} [2024-06-27 21:36:34,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-27 21:36:34,524 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 225 transitions, 2437 flow [2024-06-27 21:36:34,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:34,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:34,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:34,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:36:34,524 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:34,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash -822086481, now seen corresponding path program 1 times [2024-06-27 21:36:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:34,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855282492] [2024-06-27 21:36:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:35,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:35,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855282492] [2024-06-27 21:36:35,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855282492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:35,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:35,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:35,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972181493] [2024-06-27 21:36:35,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:35,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:35,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:35,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 225 transitions, 2437 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:35,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:35,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:35,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:36,481 INFO L124 PetriNetUnfolderBase]: 2271/3574 cut-off events. [2024-06-27 21:36:36,481 INFO L125 PetriNetUnfolderBase]: For 212155/212157 co-relation queries the response was YES. [2024-06-27 21:36:36,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26325 conditions, 3574 events. 2271/3574 cut-off events. For 212155/212157 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19768 event pairs, 497 based on Foata normal form. 12/3586 useless extension candidates. Maximal degree in co-relation 26239. Up to 2554 conditions per place. [2024-06-27 21:36:36,513 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 178 selfloop transitions, 85 changer transitions 0/268 dead transitions. [2024-06-27 21:36:36,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3198 flow [2024-06-27 21:36:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:36:36,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 21:36:36,515 INFO L175 Difference]: Start difference. First operand has 184 places, 225 transitions, 2437 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:36:36,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3198 flow [2024-06-27 21:36:36,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 268 transitions, 3022 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:36:36,853 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2481 flow [2024-06-27 21:36:36,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2481, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-27 21:36:36,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-27 21:36:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2481 flow [2024-06-27 21:36:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:36:36,854 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)] === [2024-06-27 21:36:36,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1045999512, now seen corresponding path program 1 times [2024-06-27 21:36:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635243494] [2024-06-27 21:36:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635243494] [2024-06-27 21:36:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635243494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528997466] [2024-06-27 21:36:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:37,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:37,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2481 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:37,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:37,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:37,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:37,934 INFO L124 PetriNetUnfolderBase]: 2276/3591 cut-off events. [2024-06-27 21:36:37,934 INFO L125 PetriNetUnfolderBase]: For 209159/209163 co-relation queries the response was YES. [2024-06-27 21:36:37,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26584 conditions, 3591 events. 2276/3591 cut-off events. For 209159/209163 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19786 event pairs, 592 based on Foata normal form. 5/3596 useless extension candidates. Maximal degree in co-relation 26497. Up to 3409 conditions per place. [2024-06-27 21:36:37,967 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-27 21:36:37,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 249 transitions, 3103 flow [2024-06-27 21:36:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:36:37,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:36:37,968 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2481 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:36:37,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 249 transitions, 3103 flow [2024-06-27 21:36:38,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 249 transitions, 2903 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:38,363 INFO L231 Difference]: Finished difference. Result has 185 places, 229 transitions, 2407 flow [2024-06-27 21:36:38,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2407, PETRI_PLACES=185, PETRI_TRANSITIONS=229} [2024-06-27 21:36:38,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-27 21:36:38,364 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 229 transitions, 2407 flow [2024-06-27 21:36:38,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:38,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:38,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:36:38,365 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)] === [2024-06-27 21:36:38,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1040285592, now seen corresponding path program 2 times [2024-06-27 21:36:38,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:38,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094923329] [2024-06-27 21:36:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:38,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:38,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:38,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094923329] [2024-06-27 21:36:38,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094923329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:38,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:38,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:38,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889113716] [2024-06-27 21:36:38,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:38,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:38,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:38,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:38,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 229 transitions, 2407 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:38,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:38,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:38,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:39,517 INFO L124 PetriNetUnfolderBase]: 2289/3612 cut-off events. [2024-06-27 21:36:39,518 INFO L125 PetriNetUnfolderBase]: For 215235/215239 co-relation queries the response was YES. [2024-06-27 21:36:39,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26455 conditions, 3612 events. 2289/3612 cut-off events. For 215235/215239 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19985 event pairs, 593 based on Foata normal form. 5/3617 useless extension candidates. Maximal degree in co-relation 26367. Up to 3413 conditions per place. [2024-06-27 21:36:39,551 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 36 changer transitions 0/253 dead transitions. [2024-06-27 21:36:39,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 253 transitions, 3183 flow [2024-06-27 21:36:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:36:39,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:36:39,552 INFO L175 Difference]: Start difference. First operand has 185 places, 229 transitions, 2407 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:36:39,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 253 transitions, 3183 flow [2024-06-27 21:36:39,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 253 transitions, 3107 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:39,966 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 2557 flow [2024-06-27 21:36:39,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2557, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-06-27 21:36:39,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 21:36:39,966 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 2557 flow [2024-06-27 21:36:39,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:39,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:39,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:39,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:36:39,967 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:39,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1039366915, now seen corresponding path program 7 times [2024-06-27 21:36:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419415923] [2024-06-27 21:36:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:40,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419415923] [2024-06-27 21:36:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419415923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:40,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:40,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600705222] [2024-06-27 21:36:40,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:40,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:40,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:40,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 2557 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:40,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:40,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:41,613 INFO L124 PetriNetUnfolderBase]: 2364/3731 cut-off events. [2024-06-27 21:36:41,614 INFO L125 PetriNetUnfolderBase]: For 244946/244946 co-relation queries the response was YES. [2024-06-27 21:36:41,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27506 conditions, 3731 events. 2364/3731 cut-off events. For 244946/244946 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20811 event pairs, 512 based on Foata normal form. 20/3748 useless extension candidates. Maximal degree in co-relation 27416. Up to 3063 conditions per place. [2024-06-27 21:36:41,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 84 changer transitions 0/275 dead transitions. [2024-06-27 21:36:41,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 275 transitions, 3312 flow [2024-06-27 21:36:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:36:41,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:36:41,653 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 2557 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:36:41,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 275 transitions, 3312 flow [2024-06-27 21:36:42,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 275 transitions, 3236 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:42,062 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2702 flow [2024-06-27 21:36:42,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2702, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-27 21:36:42,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 21:36:42,063 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2702 flow [2024-06-27 21:36:42,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:42,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:42,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:42,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:36:42,064 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:42,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:42,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1488554557, now seen corresponding path program 8 times [2024-06-27 21:36:42,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:42,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133551096] [2024-06-27 21:36:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:42,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:42,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:42,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133551096] [2024-06-27 21:36:42,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133551096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:42,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:42,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:42,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742539392] [2024-06-27 21:36:42,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:42,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:42,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:42,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:42,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:42,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2702 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:42,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:42,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:42,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:43,621 INFO L124 PetriNetUnfolderBase]: 2439/3864 cut-off events. [2024-06-27 21:36:43,621 INFO L125 PetriNetUnfolderBase]: For 259832/259832 co-relation queries the response was YES. [2024-06-27 21:36:43,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28870 conditions, 3864 events. 2439/3864 cut-off events. For 259832/259832 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21847 event pairs, 539 based on Foata normal form. 20/3881 useless extension candidates. Maximal degree in co-relation 28779. Up to 3188 conditions per place. [2024-06-27 21:36:43,658 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 79 changer transitions 0/277 dead transitions. [2024-06-27 21:36:43,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 3470 flow [2024-06-27 21:36:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:36:43,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 21:36:43,659 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2702 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:36:43,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 3470 flow [2024-06-27 21:36:44,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 277 transitions, 3275 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:44,046 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 2720 flow [2024-06-27 21:36:44,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2720, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2024-06-27 21:36:44,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 21:36:44,046 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 2720 flow [2024-06-27 21:36:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:44,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:44,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:36:44,047 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:44,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1289252767, now seen corresponding path program 9 times [2024-06-27 21:36:44,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:44,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908107006] [2024-06-27 21:36:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908107006] [2024-06-27 21:36:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908107006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:44,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153441446] [2024-06-27 21:36:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:44,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:44,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 2720 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:44,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:44,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:44,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:45,666 INFO L124 PetriNetUnfolderBase]: 2514/3996 cut-off events. [2024-06-27 21:36:45,666 INFO L125 PetriNetUnfolderBase]: For 271017/271017 co-relation queries the response was YES. [2024-06-27 21:36:45,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29663 conditions, 3996 events. 2514/3996 cut-off events. For 271017/271017 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22789 event pairs, 564 based on Foata normal form. 20/4013 useless extension candidates. Maximal degree in co-relation 29571. Up to 3313 conditions per place. [2024-06-27 21:36:45,703 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 82 changer transitions 0/276 dead transitions. [2024-06-27 21:36:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 276 transitions, 3474 flow [2024-06-27 21:36:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:36:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:36:45,705 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 2720 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:36:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 276 transitions, 3474 flow [2024-06-27 21:36:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 276 transitions, 3287 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:46,100 INFO L231 Difference]: Finished difference. Result has 197 places, 239 transitions, 2754 flow [2024-06-27 21:36:46,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2754, PETRI_PLACES=197, PETRI_TRANSITIONS=239} [2024-06-27 21:36:46,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 21:36:46,100 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 239 transitions, 2754 flow [2024-06-27 21:36:46,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:46,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:46,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:46,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:36:46,101 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:46,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1289104897, now seen corresponding path program 10 times [2024-06-27 21:36:46,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:46,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260850920] [2024-06-27 21:36:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:46,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260850920] [2024-06-27 21:36:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260850920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:46,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:46,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817150524] [2024-06-27 21:36:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:46,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:46,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:46,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:46,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 239 transitions, 2754 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:46,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:46,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:46,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:47,701 INFO L124 PetriNetUnfolderBase]: 2522/4016 cut-off events. [2024-06-27 21:36:47,702 INFO L125 PetriNetUnfolderBase]: For 265555/265555 co-relation queries the response was YES. [2024-06-27 21:36:47,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29346 conditions, 4016 events. 2522/4016 cut-off events. For 265555/265555 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23001 event pairs, 546 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 29253. Up to 2983 conditions per place. [2024-06-27 21:36:47,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 86 changer transitions 0/280 dead transitions. [2024-06-27 21:36:47,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 280 transitions, 3536 flow [2024-06-27 21:36:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:36:47,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:36:47,745 INFO L175 Difference]: Start difference. First operand has 197 places, 239 transitions, 2754 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:36:47,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 280 transitions, 3536 flow [2024-06-27 21:36:48,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 280 transitions, 3341 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:48,232 INFO L231 Difference]: Finished difference. Result has 199 places, 240 transitions, 2789 flow [2024-06-27 21:36:48,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2789, PETRI_PLACES=199, PETRI_TRANSITIONS=240} [2024-06-27 21:36:48,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 21:36:48,233 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 240 transitions, 2789 flow [2024-06-27 21:36:48,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-27 21:36:48,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:48,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:48,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:36:48,234 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:48,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1114933989, now seen corresponding path program 2 times [2024-06-27 21:36:48,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:48,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982145678] [2024-06-27 21:36:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:49,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:49,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982145678] [2024-06-27 21:36:49,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982145678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:49,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:49,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:49,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144203124] [2024-06-27 21:36:49,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:49,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:49,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:49,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:49,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 240 transitions, 2789 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:49,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:49,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:49,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:50,084 INFO L124 PetriNetUnfolderBase]: 2563/4087 cut-off events. [2024-06-27 21:36:50,084 INFO L125 PetriNetUnfolderBase]: For 269318/269318 co-relation queries the response was YES. [2024-06-27 21:36:50,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29806 conditions, 4087 events. 2563/4087 cut-off events. For 269318/269318 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23637 event pairs, 558 based on Foata normal form. 12/4096 useless extension candidates. Maximal degree in co-relation 29712. Up to 3314 conditions per place. [2024-06-27 21:36:50,124 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 85 changer transitions 0/282 dead transitions. [2024-06-27 21:36:50,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 282 transitions, 3588 flow [2024-06-27 21:36:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:36:50,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:36:50,125 INFO L175 Difference]: Start difference. First operand has 199 places, 240 transitions, 2789 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:36:50,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 282 transitions, 3588 flow [2024-06-27 21:36:50,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 282 transitions, 3376 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:50,600 INFO L231 Difference]: Finished difference. Result has 201 places, 241 transitions, 2807 flow [2024-06-27 21:36:50,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2807, PETRI_PLACES=201, PETRI_TRANSITIONS=241} [2024-06-27 21:36:50,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 21:36:50,601 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 241 transitions, 2807 flow [2024-06-27 21:36:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:50,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:36:50,602 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:50,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1496179069, now seen corresponding path program 3 times [2024-06-27 21:36:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826040757] [2024-06-27 21:36:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826040757] [2024-06-27 21:36:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826040757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:51,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:51,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:51,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276057427] [2024-06-27 21:36:51,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:51,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:51,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:51,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:51,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:51,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:51,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 241 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:51,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:51,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:51,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:52,505 INFO L124 PetriNetUnfolderBase]: 2604/4166 cut-off events. [2024-06-27 21:36:52,506 INFO L125 PetriNetUnfolderBase]: For 277699/277699 co-relation queries the response was YES. [2024-06-27 21:36:52,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30176 conditions, 4166 events. 2604/4166 cut-off events. For 277699/277699 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24271 event pairs, 585 based on Foata normal form. 12/4175 useless extension candidates. Maximal degree in co-relation 30081. Up to 3265 conditions per place. [2024-06-27 21:36:52,547 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-27 21:36:52,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 283 transitions, 3609 flow [2024-06-27 21:36:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:36:52,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:36:52,548 INFO L175 Difference]: Start difference. First operand has 201 places, 241 transitions, 2807 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:36:52,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 283 transitions, 3609 flow [2024-06-27 21:36:53,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 283 transitions, 3399 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:53,141 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2821 flow [2024-06-27 21:36:53,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2821, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-27 21:36:53,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 21:36:53,141 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2821 flow [2024-06-27 21:36:53,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:53,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:53,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:53,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:36:53,142 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:53,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash -553073381, now seen corresponding path program 4 times [2024-06-27 21:36:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:53,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233074568] [2024-06-27 21:36:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:53,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233074568] [2024-06-27 21:36:53,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233074568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:53,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:53,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201895886] [2024-06-27 21:36:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:54,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:54,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2821 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:54,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:54,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:54,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:55,027 INFO L124 PetriNetUnfolderBase]: 2584/4136 cut-off events. [2024-06-27 21:36:55,027 INFO L125 PetriNetUnfolderBase]: For 269217/269217 co-relation queries the response was YES. [2024-06-27 21:36:55,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29271 conditions, 4136 events. 2584/4136 cut-off events. For 269217/269217 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24081 event pairs, 509 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 29175. Up to 2434 conditions per place. [2024-06-27 21:36:55,065 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 96 changer transitions 0/281 dead transitions. [2024-06-27 21:36:55,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3474 flow [2024-06-27 21:36:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:36:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:36:55,066 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2821 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:36:55,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3474 flow [2024-06-27 21:36:55,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 281 transitions, 3270 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:55,519 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 2729 flow [2024-06-27 21:36:55,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2729, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-06-27 21:36:55,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:36:55,520 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 2729 flow [2024-06-27 21:36:55,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:55,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:55,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:55,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:36:55,521 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)] === [2024-06-27 21:36:55,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:55,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1792858836, now seen corresponding path program 3 times [2024-06-27 21:36:55,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:55,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734244245] [2024-06-27 21:36:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:55,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734244245] [2024-06-27 21:36:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734244245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:55,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766448079] [2024-06-27 21:36:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:56,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:56,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 2729 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:56,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:56,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:56,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:56,782 INFO L124 PetriNetUnfolderBase]: 2581/4130 cut-off events. [2024-06-27 21:36:56,783 INFO L125 PetriNetUnfolderBase]: For 260198/260198 co-relation queries the response was YES. [2024-06-27 21:36:56,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29234 conditions, 4130 events. 2581/4130 cut-off events. For 260198/260198 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24074 event pairs, 676 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 29137. Up to 3930 conditions per place. [2024-06-27 21:36:56,821 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 225 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-06-27 21:36:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3309 flow [2024-06-27 21:36:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:36:56,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:36:56,824 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 2729 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:36:56,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3309 flow [2024-06-27 21:36:57,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 2960 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-27 21:36:57,259 INFO L231 Difference]: Finished difference. Result has 202 places, 241 transitions, 2445 flow [2024-06-27 21:36:57,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2445, PETRI_PLACES=202, PETRI_TRANSITIONS=241} [2024-06-27 21:36:57,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-27 21:36:57,260 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 241 transitions, 2445 flow [2024-06-27 21:36:57,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:57,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:57,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:57,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:36:57,260 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)] === [2024-06-27 21:36:57,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:57,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1424768664, now seen corresponding path program 4 times [2024-06-27 21:36:57,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:57,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030174697] [2024-06-27 21:36:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:57,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030174697] [2024-06-27 21:36:57,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030174697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:57,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:57,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:57,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315271296] [2024-06-27 21:36:57,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:57,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:57,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 241 transitions, 2445 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:57,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:57,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:57,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:58,482 INFO L124 PetriNetUnfolderBase]: 2573/4117 cut-off events. [2024-06-27 21:36:58,482 INFO L125 PetriNetUnfolderBase]: For 260586/260586 co-relation queries the response was YES. [2024-06-27 21:36:58,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27998 conditions, 4117 events. 2573/4117 cut-off events. For 260586/260586 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23968 event pairs, 674 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 27902. Up to 3893 conditions per place. [2024-06-27 21:36:58,521 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 39 changer transitions 0/256 dead transitions. [2024-06-27 21:36:58,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 256 transitions, 3007 flow [2024-06-27 21:36:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:36:58,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:36:58,523 INFO L175 Difference]: Start difference. First operand has 202 places, 241 transitions, 2445 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:36:58,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 256 transitions, 3007 flow [2024-06-27 21:36:58,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 256 transitions, 2899 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:58,983 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2423 flow [2024-06-27 21:36:58,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2423, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-27 21:36:58,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 21:36:58,983 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2423 flow [2024-06-27 21:36:58,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:58,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:58,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:58,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:36:58,984 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)] === [2024-06-27 21:36:58,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1573370274, now seen corresponding path program 5 times [2024-06-27 21:36:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:58,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052540568] [2024-06-27 21:36:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:58,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:59,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052540568] [2024-06-27 21:36:59,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052540568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:59,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:59,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:36:59,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043815766] [2024-06-27 21:36:59,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:59,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:36:59,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:59,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:36:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:36:59,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:36:59,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2423 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:59,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:59,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:36:59,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:00,224 INFO L124 PetriNetUnfolderBase]: 2583/4131 cut-off events. [2024-06-27 21:37:00,225 INFO L125 PetriNetUnfolderBase]: For 268161/268165 co-relation queries the response was YES. [2024-06-27 21:37:00,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28007 conditions, 4131 events. 2583/4131 cut-off events. For 268161/268165 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24037 event pairs, 687 based on Foata normal form. 6/4136 useless extension candidates. Maximal degree in co-relation 27911. Up to 3846 conditions per place. [2024-06-27 21:37:00,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 61 changer transitions 0/257 dead transitions. [2024-06-27 21:37:00,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 257 transitions, 3146 flow [2024-06-27 21:37:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:37:00,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 21:37:00,269 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2423 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:37:00,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 257 transitions, 3146 flow [2024-06-27 21:37:00,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 3039 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:00,940 INFO L231 Difference]: Finished difference. Result has 204 places, 245 transitions, 2506 flow [2024-06-27 21:37:00,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2506, PETRI_PLACES=204, PETRI_TRANSITIONS=245} [2024-06-27 21:37:00,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:37:00,941 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 245 transitions, 2506 flow [2024-06-27 21:37:00,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:00,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:00,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:37:00,941 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)] === [2024-06-27 21:37:00,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1390122334, now seen corresponding path program 6 times [2024-06-27 21:37:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126752068] [2024-06-27 21:37:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126752068] [2024-06-27 21:37:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126752068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:01,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:01,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497938385] [2024-06-27 21:37:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:01,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:01,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 245 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:01,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:01,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:01,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:02,150 INFO L124 PetriNetUnfolderBase]: 2575/4132 cut-off events. [2024-06-27 21:37:02,150 INFO L125 PetriNetUnfolderBase]: For 272422/272426 co-relation queries the response was YES. [2024-06-27 21:37:02,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28004 conditions, 4132 events. 2575/4132 cut-off events. For 272422/272426 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24063 event pairs, 692 based on Foata normal form. 6/4137 useless extension candidates. Maximal degree in co-relation 27907. Up to 3838 conditions per place. [2024-06-27 21:37:02,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 65 changer transitions 0/256 dead transitions. [2024-06-27 21:37:02,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 256 transitions, 3048 flow [2024-06-27 21:37:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:37:02,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:37:02,185 INFO L175 Difference]: Start difference. First operand has 204 places, 245 transitions, 2506 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:37:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 256 transitions, 3048 flow [2024-06-27 21:37:02,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 256 transitions, 2903 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:02,810 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 2498 flow [2024-06-27 21:37:02,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-27 21:37:02,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 21:37:02,810 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 2498 flow [2024-06-27 21:37:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:02,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:02,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:02,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:37:02,811 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)] === [2024-06-27 21:37:02,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:02,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1587483520, now seen corresponding path program 1 times [2024-06-27 21:37:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:02,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909893129] [2024-06-27 21:37:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:02,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:03,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:03,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909893129] [2024-06-27 21:37:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909893129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:03,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404761890] [2024-06-27 21:37:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:03,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:03,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:03,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:03,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:04,140 INFO L124 PetriNetUnfolderBase]: 2419/3921 cut-off events. [2024-06-27 21:37:04,141 INFO L125 PetriNetUnfolderBase]: For 275607/275624 co-relation queries the response was YES. [2024-06-27 21:37:04,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26864 conditions, 3921 events. 2419/3921 cut-off events. For 275607/275624 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22966 event pairs, 644 based on Foata normal form. 3/3866 useless extension candidates. Maximal degree in co-relation 26766. Up to 3575 conditions per place. [2024-06-27 21:37:04,179 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-27 21:37:04,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 260 transitions, 3022 flow [2024-06-27 21:37:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:37:04,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:37:04,181 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 2498 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:37:04,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 260 transitions, 3022 flow [2024-06-27 21:37:04,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 260 transitions, 2801 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:04,682 INFO L231 Difference]: Finished difference. Result has 207 places, 248 transitions, 2403 flow [2024-06-27 21:37:04,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=207, PETRI_TRANSITIONS=248} [2024-06-27 21:37:04,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 21:37:04,682 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 248 transitions, 2403 flow [2024-06-27 21:37:04,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:04,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:04,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:37:04,683 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)] === [2024-06-27 21:37:04,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1433076912, now seen corresponding path program 1 times [2024-06-27 21:37:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535594638] [2024-06-27 21:37:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:05,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:05,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535594638] [2024-06-27 21:37:05,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535594638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:05,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:05,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:05,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982485503] [2024-06-27 21:37:05,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:05,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:05,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:05,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:05,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 248 transitions, 2403 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:05,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:05,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:05,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:06,272 INFO L124 PetriNetUnfolderBase]: 2566/4123 cut-off events. [2024-06-27 21:37:06,272 INFO L125 PetriNetUnfolderBase]: For 280069/280069 co-relation queries the response was YES. [2024-06-27 21:37:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28145 conditions, 4123 events. 2566/4123 cut-off events. For 280069/280069 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24039 event pairs, 693 based on Foata normal form. 1/4124 useless extension candidates. Maximal degree in co-relation 28047. Up to 3939 conditions per place. [2024-06-27 21:37:06,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 241 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-27 21:37:06,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 265 transitions, 2989 flow [2024-06-27 21:37:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:37:06,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:37:06,312 INFO L175 Difference]: Start difference. First operand has 207 places, 248 transitions, 2403 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:37:06,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 265 transitions, 2989 flow [2024-06-27 21:37:07,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 2865 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:07,020 INFO L231 Difference]: Finished difference. Result has 208 places, 248 transitions, 2327 flow [2024-06-27 21:37:07,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2327, PETRI_PLACES=208, PETRI_TRANSITIONS=248} [2024-06-27 21:37:07,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 21:37:07,021 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 248 transitions, 2327 flow [2024-06-27 21:37:07,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:07,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:07,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:37:07,022 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)] === [2024-06-27 21:37:07,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash 380037213, now seen corresponding path program 1 times [2024-06-27 21:37:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:07,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347351318] [2024-06-27 21:37:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:07,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347351318] [2024-06-27 21:37:07,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347351318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:07,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:07,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:07,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350437935] [2024-06-27 21:37:07,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:07,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:07,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:07,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 248 transitions, 2327 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:07,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:07,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:07,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:08,358 INFO L124 PetriNetUnfolderBase]: 2622/4196 cut-off events. [2024-06-27 21:37:08,358 INFO L125 PetriNetUnfolderBase]: For 301752/301752 co-relation queries the response was YES. [2024-06-27 21:37:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28894 conditions, 4196 events. 2622/4196 cut-off events. For 301752/301752 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24479 event pairs, 625 based on Foata normal form. 4/4199 useless extension candidates. Maximal degree in co-relation 28795. Up to 3810 conditions per place. [2024-06-27 21:37:08,399 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 75 changer transitions 0/293 dead transitions. [2024-06-27 21:37:08,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 293 transitions, 3368 flow [2024-06-27 21:37:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:37:08,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:37:08,400 INFO L175 Difference]: Start difference. First operand has 208 places, 248 transitions, 2327 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:37:08,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 293 transitions, 3368 flow [2024-06-27 21:37:08,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 293 transitions, 3320 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:08,895 INFO L231 Difference]: Finished difference. Result has 212 places, 271 transitions, 2736 flow [2024-06-27 21:37:08,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2736, PETRI_PLACES=212, PETRI_TRANSITIONS=271} [2024-06-27 21:37:08,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 21:37:08,896 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 271 transitions, 2736 flow [2024-06-27 21:37:08,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:08,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:08,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:08,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:37:08,896 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)] === [2024-06-27 21:37:08,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash 383762080, now seen corresponding path program 1 times [2024-06-27 21:37:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577597959] [2024-06-27 21:37:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577597959] [2024-06-27 21:37:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577597959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:09,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330671165] [2024-06-27 21:37:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:09,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:09,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:09,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 271 transitions, 2736 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:09,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:09,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:09,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:10,502 INFO L124 PetriNetUnfolderBase]: 2724/4349 cut-off events. [2024-06-27 21:37:10,503 INFO L125 PetriNetUnfolderBase]: For 336706/336706 co-relation queries the response was YES. [2024-06-27 21:37:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31645 conditions, 4349 events. 2724/4349 cut-off events. For 336706/336706 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25380 event pairs, 625 based on Foata normal form. 6/4354 useless extension candidates. Maximal degree in co-relation 31543. Up to 3796 conditions per place. [2024-06-27 21:37:10,548 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 202 selfloop transitions, 97 changer transitions 0/304 dead transitions. [2024-06-27 21:37:10,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 304 transitions, 3894 flow [2024-06-27 21:37:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:37:10,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:37:10,549 INFO L175 Difference]: Start difference. First operand has 212 places, 271 transitions, 2736 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:37:10,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 304 transitions, 3894 flow [2024-06-27 21:37:11,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 304 transitions, 3776 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:11,169 INFO L231 Difference]: Finished difference. Result has 218 places, 284 transitions, 3111 flow [2024-06-27 21:37:11,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3111, PETRI_PLACES=218, PETRI_TRANSITIONS=284} [2024-06-27 21:37:11,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 21:37:11,169 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 284 transitions, 3111 flow [2024-06-27 21:37:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:11,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:11,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:11,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:37:11,170 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)] === [2024-06-27 21:37:11,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 383761863, now seen corresponding path program 2 times [2024-06-27 21:37:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24011613] [2024-06-27 21:37:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:11,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24011613] [2024-06-27 21:37:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24011613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:11,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:11,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082258232] [2024-06-27 21:37:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:11,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:11,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:11,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:11,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 284 transitions, 3111 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:11,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:11,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:11,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:12,604 INFO L124 PetriNetUnfolderBase]: 2788/4445 cut-off events. [2024-06-27 21:37:12,604 INFO L125 PetriNetUnfolderBase]: For 358421/358421 co-relation queries the response was YES. [2024-06-27 21:37:12,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33213 conditions, 4445 events. 2788/4445 cut-off events. For 358421/358421 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26028 event pairs, 630 based on Foata normal form. 8/4452 useless extension candidates. Maximal degree in co-relation 33109. Up to 3815 conditions per place. [2024-06-27 21:37:12,651 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 208 selfloop transitions, 103 changer transitions 0/316 dead transitions. [2024-06-27 21:37:12,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 316 transitions, 4293 flow [2024-06-27 21:37:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:37:12,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:37:12,652 INFO L175 Difference]: Start difference. First operand has 218 places, 284 transitions, 3111 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:37:12,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 316 transitions, 4293 flow [2024-06-27 21:37:13,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 316 transitions, 4094 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:13,362 INFO L231 Difference]: Finished difference. Result has 223 places, 295 transitions, 3342 flow [2024-06-27 21:37:13,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3342, PETRI_PLACES=223, PETRI_TRANSITIONS=295} [2024-06-27 21:37:13,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-27 21:37:13,363 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 295 transitions, 3342 flow [2024-06-27 21:37:13,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:13,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:13,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:13,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:37:13,363 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)] === [2024-06-27 21:37:13,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1436799857, now seen corresponding path program 3 times [2024-06-27 21:37:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:13,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155963962] [2024-06-27 21:37:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:13,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:13,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:13,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155963962] [2024-06-27 21:37:13,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155963962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:13,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:13,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512318994] [2024-06-27 21:37:13,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:13,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:13,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:13,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:13,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:13,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 295 transitions, 3342 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:13,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:13,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:13,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:14,757 INFO L124 PetriNetUnfolderBase]: 2826/4495 cut-off events. [2024-06-27 21:37:14,758 INFO L125 PetriNetUnfolderBase]: For 366050/366050 co-relation queries the response was YES. [2024-06-27 21:37:14,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33924 conditions, 4495 events. 2826/4495 cut-off events. For 366050/366050 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26233 event pairs, 644 based on Foata normal form. 4/4498 useless extension candidates. Maximal degree in co-relation 33818. Up to 3849 conditions per place. [2024-06-27 21:37:14,808 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 105 changer transitions 0/327 dead transitions. [2024-06-27 21:37:14,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 4532 flow [2024-06-27 21:37:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:37:14,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:37:14,809 INFO L175 Difference]: Start difference. First operand has 223 places, 295 transitions, 3342 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:37:14,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 4532 flow [2024-06-27 21:37:15,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4343 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:15,790 INFO L231 Difference]: Finished difference. Result has 230 places, 307 transitions, 3662 flow [2024-06-27 21:37:15,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3662, PETRI_PLACES=230, PETRI_TRANSITIONS=307} [2024-06-27 21:37:15,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 21:37:15,791 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 307 transitions, 3662 flow [2024-06-27 21:37:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:15,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:15,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:15,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:37:15,791 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)] === [2024-06-27 21:37:15,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash -296647855, now seen corresponding path program 4 times [2024-06-27 21:37:15,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:15,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629678088] [2024-06-27 21:37:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:15,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:16,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629678088] [2024-06-27 21:37:16,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629678088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:16,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:16,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106956617] [2024-06-27 21:37:16,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:16,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:16,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 307 transitions, 3662 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:16,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:16,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:16,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:17,389 INFO L124 PetriNetUnfolderBase]: 2954/4671 cut-off events. [2024-06-27 21:37:17,389 INFO L125 PetriNetUnfolderBase]: For 414442/414444 co-relation queries the response was YES. [2024-06-27 21:37:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36640 conditions, 4671 events. 2954/4671 cut-off events. For 414442/414444 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27275 event pairs, 690 based on Foata normal form. 8/4678 useless extension candidates. Maximal degree in co-relation 36530. Up to 3729 conditions per place. [2024-06-27 21:37:17,440 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 128 changer transitions 0/348 dead transitions. [2024-06-27 21:37:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 348 transitions, 5186 flow [2024-06-27 21:37:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:37:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:37:17,441 INFO L175 Difference]: Start difference. First operand has 230 places, 307 transitions, 3662 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:37:17,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 348 transitions, 5186 flow [2024-06-27 21:37:18,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 4985 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:18,336 INFO L231 Difference]: Finished difference. Result has 237 places, 326 transitions, 4152 flow [2024-06-27 21:37:18,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4152, PETRI_PLACES=237, PETRI_TRANSITIONS=326} [2024-06-27 21:37:18,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 21:37:18,337 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 326 transitions, 4152 flow [2024-06-27 21:37:18,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:18,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:18,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:18,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:37:18,338 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)] === [2024-06-27 21:37:18,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash -296647638, now seen corresponding path program 2 times [2024-06-27 21:37:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:18,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52717731] [2024-06-27 21:37:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:18,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:19,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52717731] [2024-06-27 21:37:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52717731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:19,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:19,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:19,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346703980] [2024-06-27 21:37:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:19,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:19,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 326 transitions, 4152 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:19,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:19,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:19,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:20,065 INFO L124 PetriNetUnfolderBase]: 2936/4647 cut-off events. [2024-06-27 21:37:20,066 INFO L125 PetriNetUnfolderBase]: For 413223/413225 co-relation queries the response was YES. [2024-06-27 21:37:20,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37305 conditions, 4647 events. 2936/4647 cut-off events. For 413223/413225 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27117 event pairs, 692 based on Foata normal form. 6/4652 useless extension candidates. Maximal degree in co-relation 37191. Up to 3920 conditions per place. [2024-06-27 21:37:20,122 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 222 selfloop transitions, 128 changer transitions 0/355 dead transitions. [2024-06-27 21:37:20,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 355 transitions, 5590 flow [2024-06-27 21:37:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:37:20,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 21:37:20,123 INFO L175 Difference]: Start difference. First operand has 237 places, 326 transitions, 4152 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:37:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 355 transitions, 5590 flow [2024-06-27 21:37:21,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 355 transitions, 5307 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-27 21:37:21,121 INFO L231 Difference]: Finished difference. Result has 245 places, 336 transitions, 4412 flow [2024-06-27 21:37:21,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4412, PETRI_PLACES=245, PETRI_TRANSITIONS=336} [2024-06-27 21:37:21,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 21:37:21,121 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 336 transitions, 4412 flow [2024-06-27 21:37:21,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:21,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:21,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:37:21,122 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)] === [2024-06-27 21:37:21,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1587223554, now seen corresponding path program 3 times [2024-06-27 21:37:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:21,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478744715] [2024-06-27 21:37:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:21,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478744715] [2024-06-27 21:37:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478744715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:21,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530116667] [2024-06-27 21:37:21,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:21,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 336 transitions, 4412 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:21,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:21,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:22,728 INFO L124 PetriNetUnfolderBase]: 2946/4659 cut-off events. [2024-06-27 21:37:22,729 INFO L125 PetriNetUnfolderBase]: For 411697/411701 co-relation queries the response was YES. [2024-06-27 21:37:22,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37528 conditions, 4659 events. 2946/4659 cut-off events. For 411697/411701 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27214 event pairs, 673 based on Foata normal form. 6/4664 useless extension candidates. Maximal degree in co-relation 37410. Up to 4350 conditions per place. [2024-06-27 21:37:22,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 73 changer transitions 0/352 dead transitions. [2024-06-27 21:37:22,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 352 transitions, 5242 flow [2024-06-27 21:37:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:37:22,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 21:37:22,784 INFO L175 Difference]: Start difference. First operand has 245 places, 336 transitions, 4412 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:37:22,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 352 transitions, 5242 flow [2024-06-27 21:37:23,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 5037 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:23,787 INFO L231 Difference]: Finished difference. Result has 250 places, 340 transitions, 4462 flow [2024-06-27 21:37:23,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4462, PETRI_PLACES=250, PETRI_TRANSITIONS=340} [2024-06-27 21:37:23,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 21:37:23,787 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 340 transitions, 4462 flow [2024-06-27 21:37:23,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:23,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:23,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:23,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:37:23,788 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)] === [2024-06-27 21:37:23,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1579866107, now seen corresponding path program 5 times [2024-06-27 21:37:23,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:23,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101245189] [2024-06-27 21:37:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:23,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:24,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:24,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101245189] [2024-06-27 21:37:24,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101245189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:24,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:24,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:24,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129040227] [2024-06-27 21:37:24,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:24,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:24,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:24,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:24,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:24,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:24,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 340 transitions, 4462 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:24,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:24,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:24,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:25,356 INFO L124 PetriNetUnfolderBase]: 2966/4707 cut-off events. [2024-06-27 21:37:25,356 INFO L125 PetriNetUnfolderBase]: For 427252/427254 co-relation queries the response was YES. [2024-06-27 21:37:25,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37987 conditions, 4707 events. 2966/4707 cut-off events. For 427252/427254 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27632 event pairs, 693 based on Foata normal form. 4/4710 useless extension candidates. Maximal degree in co-relation 37867. Up to 3744 conditions per place. [2024-06-27 21:37:25,406 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 142 changer transitions 0/364 dead transitions. [2024-06-27 21:37:25,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 364 transitions, 5827 flow [2024-06-27 21:37:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:37:25,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:37:25,407 INFO L175 Difference]: Start difference. First operand has 250 places, 340 transitions, 4462 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:37:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 364 transitions, 5827 flow [2024-06-27 21:37:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 364 transitions, 5566 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:26,507 INFO L231 Difference]: Finished difference. Result has 253 places, 344 transitions, 4601 flow [2024-06-27 21:37:26,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=253, PETRI_TRANSITIONS=344} [2024-06-27 21:37:26,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 21:37:26,508 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 344 transitions, 4601 flow [2024-06-27 21:37:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:26,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:26,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:37:26,508 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)] === [2024-06-27 21:37:26,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1587490464, now seen corresponding path program 4 times [2024-06-27 21:37:26,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:26,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730680425] [2024-06-27 21:37:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730680425] [2024-06-27 21:37:27,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730680425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:27,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:27,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564726849] [2024-06-27 21:37:27,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:27,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:27,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 344 transitions, 4601 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:27,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:27,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:27,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:28,309 INFO L124 PetriNetUnfolderBase]: 2968/4692 cut-off events. [2024-06-27 21:37:28,309 INFO L125 PetriNetUnfolderBase]: For 433112/433116 co-relation queries the response was YES. [2024-06-27 21:37:28,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38506 conditions, 4692 events. 2968/4692 cut-off events. For 433112/433116 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27385 event pairs, 670 based on Foata normal form. 6/4697 useless extension candidates. Maximal degree in co-relation 38384. Up to 4357 conditions per place. [2024-06-27 21:37:28,368 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 89 changer transitions 0/368 dead transitions. [2024-06-27 21:37:28,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 368 transitions, 5565 flow [2024-06-27 21:37:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:37:28,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 21:37:28,370 INFO L175 Difference]: Start difference. First operand has 253 places, 344 transitions, 4601 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:37:28,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 368 transitions, 5565 flow [2024-06-27 21:37:29,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 368 transitions, 5290 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:29,418 INFO L231 Difference]: Finished difference. Result has 258 places, 355 transitions, 4747 flow [2024-06-27 21:37:29,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4747, PETRI_PLACES=258, PETRI_TRANSITIONS=355} [2024-06-27 21:37:29,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 21:37:29,418 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 355 transitions, 4747 flow [2024-06-27 21:37:29,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:29,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:29,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:29,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:37:29,419 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)] === [2024-06-27 21:37:29,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1587223337, now seen corresponding path program 6 times [2024-06-27 21:37:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021554678] [2024-06-27 21:37:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:29,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021554678] [2024-06-27 21:37:29,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021554678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:29,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:29,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407951801] [2024-06-27 21:37:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:29,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:29,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:30,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:30,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 355 transitions, 4747 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:30,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:30,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:30,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:30,925 INFO L124 PetriNetUnfolderBase]: 2992/4736 cut-off events. [2024-06-27 21:37:30,925 INFO L125 PetriNetUnfolderBase]: For 453654/453656 co-relation queries the response was YES. [2024-06-27 21:37:30,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38583 conditions, 4736 events. 2992/4736 cut-off events. For 453654/453656 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27729 event pairs, 681 based on Foata normal form. 8/4743 useless extension candidates. Maximal degree in co-relation 38459. Up to 3774 conditions per place. [2024-06-27 21:37:30,981 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 197 selfloop transitions, 182 changer transitions 0/384 dead transitions. [2024-06-27 21:37:30,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 384 transitions, 6250 flow [2024-06-27 21:37:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:37:30,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:37:30,983 INFO L175 Difference]: Start difference. First operand has 258 places, 355 transitions, 4747 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:37:30,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 384 transitions, 6250 flow [2024-06-27 21:37:31,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 384 transitions, 6017 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:31,999 INFO L231 Difference]: Finished difference. Result has 260 places, 366 transitions, 5143 flow [2024-06-27 21:37:32,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5143, PETRI_PLACES=260, PETRI_TRANSITIONS=366} [2024-06-27 21:37:32,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-27 21:37:32,000 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 366 transitions, 5143 flow [2024-06-27 21:37:32,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:32,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:32,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:37:32,001 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)] === [2024-06-27 21:37:32,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1855574691, now seen corresponding path program 1 times [2024-06-27 21:37:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883782693] [2024-06-27 21:37:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:32,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:32,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883782693] [2024-06-27 21:37:32,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883782693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:32,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:32,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:32,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093958519] [2024-06-27 21:37:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:32,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:32,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:32,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 366 transitions, 5143 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:32,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:32,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:32,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:33,715 INFO L124 PetriNetUnfolderBase]: 3002/4748 cut-off events. [2024-06-27 21:37:33,715 INFO L125 PetriNetUnfolderBase]: For 451766/451768 co-relation queries the response was YES. [2024-06-27 21:37:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39362 conditions, 4748 events. 3002/4748 cut-off events. For 451766/451768 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27805 event pairs, 670 based on Foata normal form. 2/4750 useless extension candidates. Maximal degree in co-relation 39237. Up to 4392 conditions per place. [2024-06-27 21:37:33,772 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 68 changer transitions 0/395 dead transitions. [2024-06-27 21:37:33,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 395 transitions, 6103 flow [2024-06-27 21:37:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:37:33,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:37:33,773 INFO L175 Difference]: Start difference. First operand has 260 places, 366 transitions, 5143 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:37:33,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 395 transitions, 6103 flow [2024-06-27 21:37:34,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 395 transitions, 5865 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:34,914 INFO L231 Difference]: Finished difference. Result has 266 places, 370 transitions, 5146 flow [2024-06-27 21:37:34,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5146, PETRI_PLACES=266, PETRI_TRANSITIONS=370} [2024-06-27 21:37:34,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-27 21:37:34,914 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 370 transitions, 5146 flow [2024-06-27 21:37:34,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:34,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:34,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:34,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:37:34,915 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)] === [2024-06-27 21:37:34,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:34,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1562911287, now seen corresponding path program 2 times [2024-06-27 21:37:34,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:34,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690030913] [2024-06-27 21:37:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:34,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690030913] [2024-06-27 21:37:35,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690030913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:35,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:35,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793473555] [2024-06-27 21:37:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:35,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:35,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:35,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:35,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 370 transitions, 5146 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:35,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:35,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:35,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:36,570 INFO L124 PetriNetUnfolderBase]: 3020/4774 cut-off events. [2024-06-27 21:37:36,571 INFO L125 PetriNetUnfolderBase]: For 463720/463722 co-relation queries the response was YES. [2024-06-27 21:37:36,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39784 conditions, 4774 events. 3020/4774 cut-off events. For 463720/463722 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27936 event pairs, 670 based on Foata normal form. 2/4776 useless extension candidates. Maximal degree in co-relation 39656. Up to 4396 conditions per place. [2024-06-27 21:37:36,624 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 74 changer transitions 0/399 dead transitions. [2024-06-27 21:37:36,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 399 transitions, 6310 flow [2024-06-27 21:37:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:37:36,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:37:36,626 INFO L175 Difference]: Start difference. First operand has 266 places, 370 transitions, 5146 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:37:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 399 transitions, 6310 flow [2024-06-27 21:37:37,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 399 transitions, 6155 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:37,646 INFO L231 Difference]: Finished difference. Result has 271 places, 376 transitions, 5315 flow [2024-06-27 21:37:37,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5315, PETRI_PLACES=271, PETRI_TRANSITIONS=376} [2024-06-27 21:37:37,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 21:37:37,647 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 376 transitions, 5315 flow [2024-06-27 21:37:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:37,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:37,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:37,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:37:37,648 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)] === [2024-06-27 21:37:37,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2110886009, now seen corresponding path program 3 times [2024-06-27 21:37:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:37,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630514316] [2024-06-27 21:37:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:37,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:38,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630514316] [2024-06-27 21:37:38,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630514316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:38,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:38,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45555025] [2024-06-27 21:37:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:38,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:38,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:38,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 376 transitions, 5315 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:38,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:38,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:38,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:39,315 INFO L124 PetriNetUnfolderBase]: 3070/4838 cut-off events. [2024-06-27 21:37:39,315 INFO L125 PetriNetUnfolderBase]: For 491681/491683 co-relation queries the response was YES. [2024-06-27 21:37:39,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41006 conditions, 4838 events. 3070/4838 cut-off events. For 491681/491683 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28339 event pairs, 690 based on Foata normal form. 2/4840 useless extension candidates. Maximal degree in co-relation 40876. Up to 4412 conditions per place. [2024-06-27 21:37:39,373 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 91 changer transitions 0/407 dead transitions. [2024-06-27 21:37:39,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 407 transitions, 6622 flow [2024-06-27 21:37:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:37:39,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 21:37:39,375 INFO L175 Difference]: Start difference. First operand has 271 places, 376 transitions, 5315 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:37:39,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 407 transitions, 6622 flow [2024-06-27 21:37:40,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 407 transitions, 6466 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:40,239 INFO L231 Difference]: Finished difference. Result has 275 places, 388 transitions, 5702 flow [2024-06-27 21:37:40,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5702, PETRI_PLACES=275, PETRI_TRANSITIONS=388} [2024-06-27 21:37:40,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-27 21:37:40,240 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 388 transitions, 5702 flow [2024-06-27 21:37:40,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:40,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:40,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:40,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:37:40,241 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)] === [2024-06-27 21:37:40,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:40,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2109811403, now seen corresponding path program 4 times [2024-06-27 21:37:40,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:40,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681646242] [2024-06-27 21:37:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:40,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:40,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681646242] [2024-06-27 21:37:40,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681646242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:40,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:40,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:40,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102212012] [2024-06-27 21:37:40,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:40,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:40,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:40,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 388 transitions, 5702 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:40,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:40,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:40,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:41,803 INFO L124 PetriNetUnfolderBase]: 3080/4858 cut-off events. [2024-06-27 21:37:41,804 INFO L125 PetriNetUnfolderBase]: For 504548/504548 co-relation queries the response was YES. [2024-06-27 21:37:41,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41554 conditions, 4858 events. 3080/4858 cut-off events. For 504548/504548 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28435 event pairs, 662 based on Foata normal form. 2/4859 useless extension candidates. Maximal degree in co-relation 41422. Up to 4502 conditions per place. [2024-06-27 21:37:41,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 67 changer transitions 0/414 dead transitions. [2024-06-27 21:37:41,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 414 transitions, 6700 flow [2024-06-27 21:37:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:37:41,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:37:41,868 INFO L175 Difference]: Start difference. First operand has 275 places, 388 transitions, 5702 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:37:41,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 414 transitions, 6700 flow [2024-06-27 21:37:43,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 414 transitions, 6523 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:43,027 INFO L231 Difference]: Finished difference. Result has 279 places, 392 transitions, 5776 flow [2024-06-27 21:37:43,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5776, PETRI_PLACES=279, PETRI_TRANSITIONS=392} [2024-06-27 21:37:43,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 21:37:43,028 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 392 transitions, 5776 flow [2024-06-27 21:37:43,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:43,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:43,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:43,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:37:43,028 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)] === [2024-06-27 21:37:43,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1372522655, now seen corresponding path program 5 times [2024-06-27 21:37:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:43,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86430244] [2024-06-27 21:37:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:43,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:43,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:43,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86430244] [2024-06-27 21:37:43,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86430244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:43,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:43,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:43,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386557333] [2024-06-27 21:37:43,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:43,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:43,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:43,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 392 transitions, 5776 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:43,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:43,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:43,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:44,767 INFO L124 PetriNetUnfolderBase]: 3074/4846 cut-off events. [2024-06-27 21:37:44,767 INFO L125 PetriNetUnfolderBase]: For 509974/509974 co-relation queries the response was YES. [2024-06-27 21:37:44,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41418 conditions, 4846 events. 3074/4846 cut-off events. For 509974/509974 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28353 event pairs, 680 based on Foata normal form. 2/4847 useless extension candidates. Maximal degree in co-relation 41284. Up to 4462 conditions per place. [2024-06-27 21:37:44,819 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 331 selfloop transitions, 77 changer transitions 0/413 dead transitions. [2024-06-27 21:37:44,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 413 transitions, 6826 flow [2024-06-27 21:37:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:37:44,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:37:44,820 INFO L175 Difference]: Start difference. First operand has 279 places, 392 transitions, 5776 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:37:44,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 413 transitions, 6826 flow [2024-06-27 21:37:45,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 6698 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:45,864 INFO L231 Difference]: Finished difference. Result has 283 places, 392 transitions, 5808 flow [2024-06-27 21:37:45,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5808, PETRI_PLACES=283, PETRI_TRANSITIONS=392} [2024-06-27 21:37:45,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 21:37:45,864 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 392 transitions, 5808 flow [2024-06-27 21:37:45,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:45,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:45,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:37:45,865 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)] === [2024-06-27 21:37:45,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash -157077163, now seen corresponding path program 6 times [2024-06-27 21:37:45,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:45,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234454093] [2024-06-27 21:37:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:46,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:46,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234454093] [2024-06-27 21:37:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234454093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:46,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981464604] [2024-06-27 21:37:46,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:46,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:46,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:46,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:46,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 392 transitions, 5808 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:46,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:46,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:47,438 INFO L124 PetriNetUnfolderBase]: 3068/4842 cut-off events. [2024-06-27 21:37:47,438 INFO L125 PetriNetUnfolderBase]: For 515827/515827 co-relation queries the response was YES. [2024-06-27 21:37:47,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41335 conditions, 4842 events. 3068/4842 cut-off events. For 515827/515827 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28385 event pairs, 664 based on Foata normal form. 2/4843 useless extension candidates. Maximal degree in co-relation 41200. Up to 4486 conditions per place. [2024-06-27 21:37:47,498 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 71 changer transitions 0/415 dead transitions. [2024-06-27 21:37:47,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 415 transitions, 6720 flow [2024-06-27 21:37:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:37:47,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:37:47,499 INFO L175 Difference]: Start difference. First operand has 283 places, 392 transitions, 5808 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:37:47,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 415 transitions, 6720 flow [2024-06-27 21:37:48,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 415 transitions, 6491 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:48,566 INFO L231 Difference]: Finished difference. Result has 284 places, 392 transitions, 5728 flow [2024-06-27 21:37:48,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5579, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5728, PETRI_PLACES=284, PETRI_TRANSITIONS=392} [2024-06-27 21:37:48,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 21:37:48,567 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 392 transitions, 5728 flow [2024-06-27 21:37:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:48,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:48,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:48,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:37:48,568 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)] === [2024-06-27 21:37:48,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -992939435, now seen corresponding path program 7 times [2024-06-27 21:37:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320588717] [2024-06-27 21:37:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320588717] [2024-06-27 21:37:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320588717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:49,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141634302] [2024-06-27 21:37:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:49,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 392 transitions, 5728 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:49,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:50,152 INFO L124 PetriNetUnfolderBase]: 3052/4820 cut-off events. [2024-06-27 21:37:50,152 INFO L125 PetriNetUnfolderBase]: For 520184/520184 co-relation queries the response was YES. [2024-06-27 21:37:50,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40886 conditions, 4820 events. 3052/4820 cut-off events. For 520184/520184 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28320 event pairs, 657 based on Foata normal form. 4/4823 useless extension candidates. Maximal degree in co-relation 40751. Up to 4396 conditions per place. [2024-06-27 21:37:50,213 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 325 selfloop transitions, 83 changer transitions 0/413 dead transitions. [2024-06-27 21:37:50,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 413 transitions, 6628 flow [2024-06-27 21:37:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:37:50,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:37:50,214 INFO L175 Difference]: Start difference. First operand has 284 places, 392 transitions, 5728 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:37:50,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 413 transitions, 6628 flow [2024-06-27 21:37:51,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 6401 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:51,502 INFO L231 Difference]: Finished difference. Result has 283 places, 392 transitions, 5675 flow [2024-06-27 21:37:51,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5501, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=283, PETRI_TRANSITIONS=392} [2024-06-27 21:37:51,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 21:37:51,503 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 392 transitions, 5675 flow [2024-06-27 21:37:51,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:51,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:51,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:51,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:37:51,503 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)] === [2024-06-27 21:37:51,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash -988737695, now seen corresponding path program 8 times [2024-06-27 21:37:51,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:51,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031980215] [2024-06-27 21:37:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:51,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031980215] [2024-06-27 21:37:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031980215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:52,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:52,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:52,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67179839] [2024-06-27 21:37:52,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:52,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:52,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:52,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:52,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 392 transitions, 5675 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:52,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:52,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:52,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:53,224 INFO L124 PetriNetUnfolderBase]: 3086/4873 cut-off events. [2024-06-27 21:37:53,224 INFO L125 PetriNetUnfolderBase]: For 539405/539405 co-relation queries the response was YES. [2024-06-27 21:37:53,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41361 conditions, 4873 events. 3086/4873 cut-off events. For 539405/539405 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28577 event pairs, 665 based on Foata normal form. 6/4878 useless extension candidates. Maximal degree in co-relation 41228. Up to 4156 conditions per place. [2024-06-27 21:37:53,278 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 281 selfloop transitions, 133 changer transitions 0/419 dead transitions. [2024-06-27 21:37:53,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 419 transitions, 7042 flow [2024-06-27 21:37:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:37:53,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:37:53,279 INFO L175 Difference]: Start difference. First operand has 283 places, 392 transitions, 5675 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:37:53,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 419 transitions, 7042 flow [2024-06-27 21:37:54,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 419 transitions, 6838 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:54,564 INFO L231 Difference]: Finished difference. Result has 284 places, 399 transitions, 5893 flow [2024-06-27 21:37:54,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5893, PETRI_PLACES=284, PETRI_TRANSITIONS=399} [2024-06-27 21:37:54,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 21:37:54,564 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 399 transitions, 5893 flow [2024-06-27 21:37:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:54,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:54,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:37:54,565 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)] === [2024-06-27 21:37:54,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash -988470785, now seen corresponding path program 9 times [2024-06-27 21:37:54,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:54,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841044033] [2024-06-27 21:37:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841044033] [2024-06-27 21:37:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841044033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:55,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:55,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:55,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287697142] [2024-06-27 21:37:55,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:55,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:55,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:55,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 399 transitions, 5893 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:55,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:55,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:55,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:56,146 INFO L124 PetriNetUnfolderBase]: 3062/4846 cut-off events. [2024-06-27 21:37:56,146 INFO L125 PetriNetUnfolderBase]: For 532774/532774 co-relation queries the response was YES. [2024-06-27 21:37:56,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40906 conditions, 4846 events. 3062/4846 cut-off events. For 532774/532774 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28499 event pairs, 653 based on Foata normal form. 6/4851 useless extension candidates. Maximal degree in co-relation 40772. Up to 4140 conditions per place. [2024-06-27 21:37:56,209 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 129 changer transitions 0/418 dead transitions. [2024-06-27 21:37:56,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 418 transitions, 6953 flow [2024-06-27 21:37:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:37:56,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:37:56,210 INFO L175 Difference]: Start difference. First operand has 284 places, 399 transitions, 5893 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:37:56,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 418 transitions, 6953 flow [2024-06-27 21:37:57,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 418 transitions, 6480 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:57,254 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 5691 flow [2024-06-27 21:37:57,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5691, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2024-06-27 21:37:57,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 21:37:57,255 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 5691 flow [2024-06-27 21:37:57,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:57,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:37:57,256 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)] === [2024-06-27 21:37:57,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -813255913, now seen corresponding path program 10 times [2024-06-27 21:37:57,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:57,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950502459] [2024-06-27 21:37:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950502459] [2024-06-27 21:37:57,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950502459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:57,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:57,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:57,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2475434] [2024-06-27 21:37:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:57,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:57,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:57,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:37:57,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 5691 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:57,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:57,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:37:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:58,835 INFO L124 PetriNetUnfolderBase]: 3120/4926 cut-off events. [2024-06-27 21:37:58,835 INFO L125 PetriNetUnfolderBase]: For 553458/553460 co-relation queries the response was YES. [2024-06-27 21:37:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41635 conditions, 4926 events. 3120/4926 cut-off events. For 553458/553460 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28933 event pairs, 694 based on Foata normal form. 6/4931 useless extension candidates. Maximal degree in co-relation 41501. Up to 3872 conditions per place. [2024-06-27 21:37:58,900 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 208 changer transitions 0/428 dead transitions. [2024-06-27 21:37:58,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 428 transitions, 7298 flow [2024-06-27 21:37:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:37:58,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:37:58,901 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 5691 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:37:58,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 428 transitions, 7298 flow [2024-06-27 21:38:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 428 transitions, 7072 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:00,101 INFO L231 Difference]: Finished difference. Result has 288 places, 410 transitions, 6111 flow [2024-06-27 21:38:00,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6111, PETRI_PLACES=288, PETRI_TRANSITIONS=410} [2024-06-27 21:38:00,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 21:38:00,102 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 410 transitions, 6111 flow [2024-06-27 21:38:00,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:00,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:00,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:38:00,102 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)] === [2024-06-27 21:38:00,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1978296241, now seen corresponding path program 11 times [2024-06-27 21:38:00,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:00,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870004843] [2024-06-27 21:38:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:00,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870004843] [2024-06-27 21:38:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870004843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:00,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:00,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:00,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94524147] [2024-06-27 21:38:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:00,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 410 transitions, 6111 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:00,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:01,901 INFO L124 PetriNetUnfolderBase]: 3150/4975 cut-off events. [2024-06-27 21:38:01,901 INFO L125 PetriNetUnfolderBase]: For 569102/569104 co-relation queries the response was YES. [2024-06-27 21:38:01,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42583 conditions, 4975 events. 3150/4975 cut-off events. For 569102/569104 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29250 event pairs, 685 based on Foata normal form. 6/4980 useless extension candidates. Maximal degree in co-relation 42447. Up to 3894 conditions per place. [2024-06-27 21:38:01,961 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 199 changer transitions 0/435 dead transitions. [2024-06-27 21:38:01,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 435 transitions, 7668 flow [2024-06-27 21:38:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:38:01,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:38:01,962 INFO L175 Difference]: Start difference. First operand has 288 places, 410 transitions, 6111 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:38:01,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 435 transitions, 7668 flow [2024-06-27 21:38:03,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 435 transitions, 7137 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:03,400 INFO L231 Difference]: Finished difference. Result has 291 places, 417 transitions, 6129 flow [2024-06-27 21:38:03,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6129, PETRI_PLACES=291, PETRI_TRANSITIONS=417} [2024-06-27 21:38:03,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 21:38:03,400 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 417 transitions, 6129 flow [2024-06-27 21:38:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:03,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:03,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:03,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:38:03,401 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)] === [2024-06-27 21:38:03,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1730928481, now seen corresponding path program 12 times [2024-06-27 21:38:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:03,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705343935] [2024-06-27 21:38:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:03,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:03,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:03,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705343935] [2024-06-27 21:38:03,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705343935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:03,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:03,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:03,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680179220] [2024-06-27 21:38:03,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:03,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:03,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:03,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:04,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:04,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 417 transitions, 6129 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:04,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:04,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:04,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:04,976 INFO L124 PetriNetUnfolderBase]: 3128/4945 cut-off events. [2024-06-27 21:38:04,976 INFO L125 PetriNetUnfolderBase]: For 559286/559288 co-relation queries the response was YES. [2024-06-27 21:38:05,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41869 conditions, 4945 events. 3128/4945 cut-off events. For 559286/559288 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29105 event pairs, 695 based on Foata normal form. 6/4950 useless extension candidates. Maximal degree in co-relation 41732. Up to 3880 conditions per place. [2024-06-27 21:38:05,046 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 195 changer transitions 0/435 dead transitions. [2024-06-27 21:38:05,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 435 transitions, 7557 flow [2024-06-27 21:38:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:38:05,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:38:05,047 INFO L175 Difference]: Start difference. First operand has 291 places, 417 transitions, 6129 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:38:05,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 435 transitions, 7557 flow [2024-06-27 21:38:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 435 transitions, 7176 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:06,558 INFO L231 Difference]: Finished difference. Result has 295 places, 417 transitions, 6149 flow [2024-06-27 21:38:06,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6149, PETRI_PLACES=295, PETRI_TRANSITIONS=417} [2024-06-27 21:38:06,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 21:38:06,559 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 417 transitions, 6149 flow [2024-06-27 21:38:06,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:06,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:06,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:38:06,560 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)] === [2024-06-27 21:38:06,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1952617975, now seen corresponding path program 1 times [2024-06-27 21:38:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910651376] [2024-06-27 21:38:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:07,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910651376] [2024-06-27 21:38:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910651376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:07,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964616082] [2024-06-27 21:38:07,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:07,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:07,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 417 transitions, 6149 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:07,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:07,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:08,499 INFO L124 PetriNetUnfolderBase]: 3016/4833 cut-off events. [2024-06-27 21:38:08,500 INFO L125 PetriNetUnfolderBase]: For 599481/599483 co-relation queries the response was YES. [2024-06-27 21:38:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40847 conditions, 4833 events. 3016/4833 cut-off events. For 599481/599483 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28966 event pairs, 641 based on Foata normal form. 15/4814 useless extension candidates. Maximal degree in co-relation 40709. Up to 4213 conditions per place. [2024-06-27 21:38:08,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 39 changer transitions 0/441 dead transitions. [2024-06-27 21:38:08,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 441 transitions, 7028 flow [2024-06-27 21:38:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:38:08,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:38:08,567 INFO L175 Difference]: Start difference. First operand has 295 places, 417 transitions, 6149 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:38:08,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 441 transitions, 7028 flow [2024-06-27 21:38:09,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 441 transitions, 6478 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 21:38:09,916 INFO L231 Difference]: Finished difference. Result has 295 places, 424 transitions, 5789 flow [2024-06-27 21:38:09,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5789, PETRI_PLACES=295, PETRI_TRANSITIONS=424} [2024-06-27 21:38:09,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 21:38:09,916 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 424 transitions, 5789 flow [2024-06-27 21:38:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:09,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:09,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:09,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:38:09,917 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)] === [2024-06-27 21:38:09,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:09,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1967855095, now seen corresponding path program 2 times [2024-06-27 21:38:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:09,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69697327] [2024-06-27 21:38:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:09,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:10,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:10,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69697327] [2024-06-27 21:38:10,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69697327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:10,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:10,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:10,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623052901] [2024-06-27 21:38:10,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:10,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:10,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:10,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 424 transitions, 5789 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:10,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:10,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:10,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:11,772 INFO L124 PetriNetUnfolderBase]: 3104/4962 cut-off events. [2024-06-27 21:38:11,772 INFO L125 PetriNetUnfolderBase]: For 624688/624690 co-relation queries the response was YES. [2024-06-27 21:38:11,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42144 conditions, 4962 events. 3104/4962 cut-off events. For 624688/624690 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29771 event pairs, 664 based on Foata normal form. 9/4937 useless extension candidates. Maximal degree in co-relation 42005. Up to 4172 conditions per place. [2024-06-27 21:38:11,834 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 315 selfloop transitions, 48 changer transitions 0/448 dead transitions. [2024-06-27 21:38:11,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 448 transitions, 6859 flow [2024-06-27 21:38:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:38:11,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 21:38:11,835 INFO L175 Difference]: Start difference. First operand has 295 places, 424 transitions, 5789 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:38:11,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 448 transitions, 6859 flow [2024-06-27 21:38:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 448 transitions, 6766 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:13,252 INFO L231 Difference]: Finished difference. Result has 298 places, 426 transitions, 5838 flow [2024-06-27 21:38:13,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5696, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5838, PETRI_PLACES=298, PETRI_TRANSITIONS=426} [2024-06-27 21:38:13,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 21:38:13,253 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 426 transitions, 5838 flow [2024-06-27 21:38:13,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:13,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:13,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:38:13,253 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)] === [2024-06-27 21:38:13,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -370180849, now seen corresponding path program 3 times [2024-06-27 21:38:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:13,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913232904] [2024-06-27 21:38:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:13,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913232904] [2024-06-27 21:38:13,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913232904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:13,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:13,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:13,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414772015] [2024-06-27 21:38:13,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:13,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:13,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:13,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:14,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:14,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 426 transitions, 5838 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:14,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:14,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:14,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:15,165 INFO L124 PetriNetUnfolderBase]: 3114/4974 cut-off events. [2024-06-27 21:38:15,165 INFO L125 PetriNetUnfolderBase]: For 631278/631280 co-relation queries the response was YES. [2024-06-27 21:38:15,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42027 conditions, 4974 events. 3114/4974 cut-off events. For 631278/631280 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29806 event pairs, 672 based on Foata normal form. 11/4949 useless extension candidates. Maximal degree in co-relation 41887. Up to 4315 conditions per place. [2024-06-27 21:38:15,239 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 51 changer transitions 0/445 dead transitions. [2024-06-27 21:38:15,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 445 transitions, 6666 flow [2024-06-27 21:38:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:38:15,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:38:15,240 INFO L175 Difference]: Start difference. First operand has 298 places, 426 transitions, 5838 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:38:15,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 445 transitions, 6666 flow [2024-06-27 21:38:16,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 445 transitions, 6603 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:16,581 INFO L231 Difference]: Finished difference. Result has 303 places, 427 transitions, 5913 flow [2024-06-27 21:38:16,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5913, PETRI_PLACES=303, PETRI_TRANSITIONS=427} [2024-06-27 21:38:16,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-27 21:38:16,581 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 427 transitions, 5913 flow [2024-06-27 21:38:16,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:16,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:16,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:38:16,582 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)] === [2024-06-27 21:38:16,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1106608995, now seen corresponding path program 1 times [2024-06-27 21:38:16,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:16,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127395886] [2024-06-27 21:38:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:17,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:17,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127395886] [2024-06-27 21:38:17,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127395886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:17,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:17,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:17,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600175017] [2024-06-27 21:38:17,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:17,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:17,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:17,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:17,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 427 transitions, 5913 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:17,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:17,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:17,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:18,621 INFO L124 PetriNetUnfolderBase]: 3295/5223 cut-off events. [2024-06-27 21:38:18,621 INFO L125 PetriNetUnfolderBase]: For 616385/616385 co-relation queries the response was YES. [2024-06-27 21:38:18,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44174 conditions, 5223 events. 3295/5223 cut-off events. For 616385/616385 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31159 event pairs, 673 based on Foata normal form. 2/5225 useless extension candidates. Maximal degree in co-relation 44032. Up to 4966 conditions per place. [2024-06-27 21:38:18,691 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 429 selfloop transitions, 17 changer transitions 0/451 dead transitions. [2024-06-27 21:38:18,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 451 transitions, 6959 flow [2024-06-27 21:38:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:38:18,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:38:18,692 INFO L175 Difference]: Start difference. First operand has 303 places, 427 transitions, 5913 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:38:18,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 451 transitions, 6959 flow [2024-06-27 21:38:20,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 451 transitions, 6859 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:20,318 INFO L231 Difference]: Finished difference. Result has 304 places, 429 transitions, 5928 flow [2024-06-27 21:38:20,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5813, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=304, PETRI_TRANSITIONS=429} [2024-06-27 21:38:20,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-27 21:38:20,318 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 429 transitions, 5928 flow [2024-06-27 21:38:20,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:20,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:20,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:20,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:38:20,319 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)] === [2024-06-27 21:38:20,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1106548421, now seen corresponding path program 1 times [2024-06-27 21:38:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:20,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595061089] [2024-06-27 21:38:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:21,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595061089] [2024-06-27 21:38:21,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595061089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:21,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:21,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:21,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254322234] [2024-06-27 21:38:21,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:21,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:21,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 429 transitions, 5928 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:21,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:21,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:21,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:22,379 INFO L124 PetriNetUnfolderBase]: 3289/5208 cut-off events. [2024-06-27 21:38:22,379 INFO L125 PetriNetUnfolderBase]: For 619876/619876 co-relation queries the response was YES. [2024-06-27 21:38:22,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44008 conditions, 5208 events. 3289/5208 cut-off events. For 619876/619876 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31038 event pairs, 680 based on Foata normal form. 2/5209 useless extension candidates. Maximal degree in co-relation 43865. Up to 4711 conditions per place. [2024-06-27 21:38:22,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 98 changer transitions 0/451 dead transitions. [2024-06-27 21:38:22,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 451 transitions, 7086 flow [2024-06-27 21:38:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:38:22,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:38:22,440 INFO L175 Difference]: Start difference. First operand has 304 places, 429 transitions, 5928 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:38:22,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 451 transitions, 7086 flow [2024-06-27 21:38:23,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 451 transitions, 6953 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:23,952 INFO L231 Difference]: Finished difference. Result has 306 places, 429 transitions, 6010 flow [2024-06-27 21:38:23,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=306, PETRI_TRANSITIONS=429} [2024-06-27 21:38:23,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 21:38:23,952 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 429 transitions, 6010 flow [2024-06-27 21:38:23,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:23,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:23,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:38:23,953 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)] === [2024-06-27 21:38:23,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1106548545, now seen corresponding path program 2 times [2024-06-27 21:38:23,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751813279] [2024-06-27 21:38:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:24,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:24,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751813279] [2024-06-27 21:38:24,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751813279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:24,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:24,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:24,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811378076] [2024-06-27 21:38:24,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:24,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:24,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:24,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:24,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 429 transitions, 6010 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:24,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:24,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:24,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:25,957 INFO L124 PetriNetUnfolderBase]: 3297/5221 cut-off events. [2024-06-27 21:38:25,957 INFO L125 PetriNetUnfolderBase]: For 636238/636238 co-relation queries the response was YES. [2024-06-27 21:38:26,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44461 conditions, 5221 events. 3297/5221 cut-off events. For 636238/636238 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31098 event pairs, 697 based on Foata normal form. 2/5223 useless extension candidates. Maximal degree in co-relation 44317. Up to 4979 conditions per place. [2024-06-27 21:38:26,033 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 21 changer transitions 0/450 dead transitions. [2024-06-27 21:38:26,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 450 transitions, 7046 flow [2024-06-27 21:38:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:38:26,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:38:26,035 INFO L175 Difference]: Start difference. First operand has 306 places, 429 transitions, 6010 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:38:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 450 transitions, 7046 flow [2024-06-27 21:38:28,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 450 transitions, 6805 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:28,034 INFO L231 Difference]: Finished difference. Result has 307 places, 431 transitions, 5897 flow [2024-06-27 21:38:28,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5769, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=307, PETRI_TRANSITIONS=431} [2024-06-27 21:38:28,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-27 21:38:28,035 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 431 transitions, 5897 flow [2024-06-27 21:38:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:28,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:28,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:28,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:38:28,036 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)] === [2024-06-27 21:38:28,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash -908138711, now seen corresponding path program 3 times [2024-06-27 21:38:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:28,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957514997] [2024-06-27 21:38:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:28,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957514997] [2024-06-27 21:38:28,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957514997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:28,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:28,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:28,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197413041] [2024-06-27 21:38:28,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:28,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:28,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:28,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 431 transitions, 5897 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:28,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:28,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:29,940 INFO L124 PetriNetUnfolderBase]: 3305/5229 cut-off events. [2024-06-27 21:38:29,940 INFO L125 PetriNetUnfolderBase]: For 650038/650038 co-relation queries the response was YES. [2024-06-27 21:38:29,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 5229 events. 3305/5229 cut-off events. For 650038/650038 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31132 event pairs, 694 based on Foata normal form. 2/5231 useless extension candidates. Maximal degree in co-relation 44304. Up to 4984 conditions per place. [2024-06-27 21:38:30,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 26 changer transitions 0/450 dead transitions. [2024-06-27 21:38:30,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 450 transitions, 6927 flow [2024-06-27 21:38:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:38:30,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:38:30,014 INFO L175 Difference]: Start difference. First operand has 307 places, 431 transitions, 5897 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:38:30,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 450 transitions, 6927 flow [2024-06-27 21:38:31,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 450 transitions, 6817 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:31,607 INFO L231 Difference]: Finished difference. Result has 309 places, 433 transitions, 5928 flow [2024-06-27 21:38:31,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=309, PETRI_TRANSITIONS=433} [2024-06-27 21:38:31,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-27 21:38:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 433 transitions, 5928 flow [2024-06-27 21:38:31,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:31,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:31,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:38:31,608 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)] === [2024-06-27 21:38:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1591303555, now seen corresponding path program 1 times [2024-06-27 21:38:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439664465] [2024-06-27 21:38:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:32,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:32,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439664465] [2024-06-27 21:38:32,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439664465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:32,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:32,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:32,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621722136] [2024-06-27 21:38:32,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:32,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:32,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:32,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:32,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 433 transitions, 5928 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:32,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:32,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:32,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:33,698 INFO L124 PetriNetUnfolderBase]: 3403/5385 cut-off events. [2024-06-27 21:38:33,698 INFO L125 PetriNetUnfolderBase]: For 764192/764192 co-relation queries the response was YES. [2024-06-27 21:38:33,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45987 conditions, 5385 events. 3403/5385 cut-off events. For 764192/764192 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32229 event pairs, 706 based on Foata normal form. 24/5408 useless extension candidates. Maximal degree in co-relation 45842. Up to 4617 conditions per place. [2024-06-27 21:38:33,767 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 140 changer transitions 0/461 dead transitions. [2024-06-27 21:38:33,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 461 transitions, 7234 flow [2024-06-27 21:38:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:38:33,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:38:33,768 INFO L175 Difference]: Start difference. First operand has 309 places, 433 transitions, 5928 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:38:33,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 461 transitions, 7234 flow [2024-06-27 21:38:35,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 461 transitions, 7109 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:35,960 INFO L231 Difference]: Finished difference. Result has 312 places, 436 transitions, 6197 flow [2024-06-27 21:38:35,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6197, PETRI_PLACES=312, PETRI_TRANSITIONS=436} [2024-06-27 21:38:35,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 21:38:35,960 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 436 transitions, 6197 flow [2024-06-27 21:38:35,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:35,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:35,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:35,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:38:35,961 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)] === [2024-06-27 21:38:35,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1731205311, now seen corresponding path program 4 times [2024-06-27 21:38:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701244273] [2024-06-27 21:38:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:36,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:36,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701244273] [2024-06-27 21:38:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701244273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:36,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:36,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:36,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863052440] [2024-06-27 21:38:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:36,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:36,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:36,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 436 transitions, 6197 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:36,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:36,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:36,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:37,865 INFO L124 PetriNetUnfolderBase]: 3398/5381 cut-off events. [2024-06-27 21:38:37,865 INFO L125 PetriNetUnfolderBase]: For 678654/678656 co-relation queries the response was YES. [2024-06-27 21:38:37,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46407 conditions, 5381 events. 3398/5381 cut-off events. For 678654/678656 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32224 event pairs, 711 based on Foata normal form. 2/5383 useless extension candidates. Maximal degree in co-relation 46261. Up to 5119 conditions per place. [2024-06-27 21:38:37,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 33 changer transitions 0/452 dead transitions. [2024-06-27 21:38:37,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 452 transitions, 7223 flow [2024-06-27 21:38:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:38:37,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 21:38:37,942 INFO L175 Difference]: Start difference. First operand has 312 places, 436 transitions, 6197 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:38:37,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 452 transitions, 7223 flow [2024-06-27 21:38:40,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 452 transitions, 6875 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:40,116 INFO L231 Difference]: Finished difference. Result has 313 places, 438 transitions, 6010 flow [2024-06-27 21:38:40,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=313, PETRI_TRANSITIONS=438} [2024-06-27 21:38:40,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 21:38:40,116 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 438 transitions, 6010 flow [2024-06-27 21:38:40,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:40,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:40,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:40,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:38:40,117 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)] === [2024-06-27 21:38:40,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -119576853, now seen corresponding path program 2 times [2024-06-27 21:38:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:40,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799792609] [2024-06-27 21:38:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:40,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799792609] [2024-06-27 21:38:40,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799792609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:40,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:40,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:40,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974326023] [2024-06-27 21:38:40,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:40,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:40,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:41,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:41,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 438 transitions, 6010 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:41,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:41,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:41,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:42,077 INFO L124 PetriNetUnfolderBase]: 3414/5403 cut-off events. [2024-06-27 21:38:42,077 INFO L125 PetriNetUnfolderBase]: For 692600/692604 co-relation queries the response was YES. [2024-06-27 21:38:42,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45821 conditions, 5403 events. 3414/5403 cut-off events. For 692600/692604 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32381 event pairs, 719 based on Foata normal form. 8/5410 useless extension candidates. Maximal degree in co-relation 45674. Up to 5039 conditions per place. [2024-06-27 21:38:42,152 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 69 changer transitions 0/455 dead transitions. [2024-06-27 21:38:42,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 455 transitions, 7064 flow [2024-06-27 21:38:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:38:42,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 21:38:42,153 INFO L175 Difference]: Start difference. First operand has 313 places, 438 transitions, 6010 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:38:42,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 455 transitions, 7064 flow [2024-06-27 21:38:44,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 455 transitions, 6919 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:44,592 INFO L231 Difference]: Finished difference. Result has 316 places, 441 transitions, 6123 flow [2024-06-27 21:38:44,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6123, PETRI_PLACES=316, PETRI_TRANSITIONS=441} [2024-06-27 21:38:44,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-27 21:38:44,593 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 441 transitions, 6123 flow [2024-06-27 21:38:44,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:44,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:44,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:44,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:38:44,593 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)] === [2024-06-27 21:38:44,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1959284401, now seen corresponding path program 1 times [2024-06-27 21:38:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:44,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680143126] [2024-06-27 21:38:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:44,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:45,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:45,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680143126] [2024-06-27 21:38:45,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680143126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:45,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:45,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:45,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511366871] [2024-06-27 21:38:45,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:45,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:45,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:45,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:45,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:45,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 441 transitions, 6123 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:45,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:45,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:45,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:46,667 INFO L124 PetriNetUnfolderBase]: 3402/5382 cut-off events. [2024-06-27 21:38:46,667 INFO L125 PetriNetUnfolderBase]: For 689096/689098 co-relation queries the response was YES. [2024-06-27 21:38:46,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45567 conditions, 5382 events. 3402/5382 cut-off events. For 689096/689098 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32182 event pairs, 734 based on Foata normal form. 4/5385 useless extension candidates. Maximal degree in co-relation 45419. Up to 4583 conditions per place. [2024-06-27 21:38:46,739 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 269 selfloop transitions, 185 changer transitions 0/459 dead transitions. [2024-06-27 21:38:46,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 459 transitions, 7287 flow [2024-06-27 21:38:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:38:46,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 21:38:46,740 INFO L175 Difference]: Start difference. First operand has 316 places, 441 transitions, 6123 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:38:46,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 459 transitions, 7287 flow [2024-06-27 21:38:49,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 7008 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:49,042 INFO L231 Difference]: Finished difference. Result has 320 places, 442 transitions, 6236 flow [2024-06-27 21:38:49,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6236, PETRI_PLACES=320, PETRI_TRANSITIONS=442} [2024-06-27 21:38:49,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-27 21:38:49,043 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 442 transitions, 6236 flow [2024-06-27 21:38:49,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:49,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:49,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:49,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:38:49,044 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)] === [2024-06-27 21:38:49,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash -599884835, now seen corresponding path program 3 times [2024-06-27 21:38:49,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039034681] [2024-06-27 21:38:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039034681] [2024-06-27 21:38:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039034681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:49,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737828790] [2024-06-27 21:38:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:49,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:49,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:49,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:49,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 442 transitions, 6236 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:49,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:49,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:49,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:51,068 INFO L124 PetriNetUnfolderBase]: 3490/5528 cut-off events. [2024-06-27 21:38:51,069 INFO L125 PetriNetUnfolderBase]: For 804445/804447 co-relation queries the response was YES. [2024-06-27 21:38:51,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47258 conditions, 5528 events. 3490/5528 cut-off events. For 804445/804447 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 33206 event pairs, 752 based on Foata normal form. 24/5551 useless extension candidates. Maximal degree in co-relation 47108. Up to 4617 conditions per place. [2024-06-27 21:38:51,148 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 271 selfloop transitions, 191 changer transitions 0/467 dead transitions. [2024-06-27 21:38:51,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 467 transitions, 7560 flow [2024-06-27 21:38:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:38:51,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:38:51,149 INFO L175 Difference]: Start difference. First operand has 320 places, 442 transitions, 6236 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:38:51,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 467 transitions, 7560 flow [2024-06-27 21:38:53,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 467 transitions, 7281 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:53,716 INFO L231 Difference]: Finished difference. Result has 323 places, 445 transitions, 6467 flow [2024-06-27 21:38:53,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6467, PETRI_PLACES=323, PETRI_TRANSITIONS=445} [2024-06-27 21:38:53,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-27 21:38:53,717 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 445 transitions, 6467 flow [2024-06-27 21:38:53,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:53,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:53,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:53,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:38:53,717 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)] === [2024-06-27 21:38:53,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -369668915, now seen corresponding path program 4 times [2024-06-27 21:38:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:53,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774259071] [2024-06-27 21:38:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:54,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:54,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774259071] [2024-06-27 21:38:54,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774259071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:54,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:54,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:54,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195609743] [2024-06-27 21:38:54,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:54,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:54,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:54,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:54,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 445 transitions, 6467 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:54,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:54,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:54,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:55,794 INFO L124 PetriNetUnfolderBase]: 3637/5746 cut-off events. [2024-06-27 21:38:55,794 INFO L125 PetriNetUnfolderBase]: For 848605/848607 co-relation queries the response was YES. [2024-06-27 21:38:55,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52121 conditions, 5746 events. 3637/5746 cut-off events. For 848605/848607 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34598 event pairs, 764 based on Foata normal form. 4/5749 useless extension candidates. Maximal degree in co-relation 51970. Up to 4457 conditions per place. [2024-06-27 21:38:55,880 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 227 changer transitions 0/475 dead transitions. [2024-06-27 21:38:55,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 475 transitions, 8143 flow [2024-06-27 21:38:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:38:55,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 21:38:55,883 INFO L175 Difference]: Start difference. First operand has 323 places, 445 transitions, 6467 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:38:55,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 475 transitions, 8143 flow [2024-06-27 21:38:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 475 transitions, 7679 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:58,919 INFO L231 Difference]: Finished difference. Result has 326 places, 452 transitions, 6748 flow [2024-06-27 21:38:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6748, PETRI_PLACES=326, PETRI_TRANSITIONS=452} [2024-06-27 21:38:58,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-27 21:38:58,921 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 452 transitions, 6748 flow [2024-06-27 21:38:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:58,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:58,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:58,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:38:58,921 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)] === [2024-06-27 21:38:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -369965585, now seen corresponding path program 5 times [2024-06-27 21:38:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:58,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399857794] [2024-06-27 21:38:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:58,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399857794] [2024-06-27 21:38:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399857794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:59,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761425644] [2024-06-27 21:38:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:59,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:38:59,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 452 transitions, 6748 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:59,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:59,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:38:59,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:01,107 INFO L124 PetriNetUnfolderBase]: 3627/5737 cut-off events. [2024-06-27 21:39:01,107 INFO L125 PetriNetUnfolderBase]: For 836348/836350 co-relation queries the response was YES. [2024-06-27 21:39:01,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51594 conditions, 5737 events. 3627/5737 cut-off events. For 836348/836350 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34633 event pairs, 787 based on Foata normal form. 4/5740 useless extension candidates. Maximal degree in co-relation 51441. Up to 4823 conditions per place. [2024-06-27 21:39:01,191 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 252 selfloop transitions, 214 changer transitions 0/471 dead transitions. [2024-06-27 21:39:01,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 471 transitions, 8022 flow [2024-06-27 21:39:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:39:01,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:39:01,192 INFO L175 Difference]: Start difference. First operand has 326 places, 452 transitions, 6748 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:39:01,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 471 transitions, 8022 flow [2024-06-27 21:39:04,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 471 transitions, 7556 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:04,743 INFO L231 Difference]: Finished difference. Result has 329 places, 454 transitions, 6810 flow [2024-06-27 21:39:04,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6292, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6810, PETRI_PLACES=329, PETRI_TRANSITIONS=454} [2024-06-27 21:39:04,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 21:39:04,743 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 454 transitions, 6810 flow [2024-06-27 21:39:04,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:04,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:04,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:04,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:39:04,743 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)] === [2024-06-27 21:39:04,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1488364749, now seen corresponding path program 1 times [2024-06-27 21:39:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:04,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208409366] [2024-06-27 21:39:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:05,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:05,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208409366] [2024-06-27 21:39:05,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208409366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:05,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:05,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:05,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089327302] [2024-06-27 21:39:05,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:05,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:05,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:05,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:05,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:05,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 454 transitions, 6810 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:05,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:05,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:05,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:06,652 INFO L124 PetriNetUnfolderBase]: 3632/5745 cut-off events. [2024-06-27 21:39:06,652 INFO L125 PetriNetUnfolderBase]: For 830018/830018 co-relation queries the response was YES. [2024-06-27 21:39:06,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51780 conditions, 5745 events. 3632/5745 cut-off events. For 830018/830018 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34698 event pairs, 759 based on Foata normal form. 1/5746 useless extension candidates. Maximal degree in co-relation 51626. Up to 5467 conditions per place. [2024-06-27 21:39:06,732 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 450 selfloop transitions, 28 changer transitions 0/483 dead transitions. [2024-06-27 21:39:06,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 483 transitions, 7951 flow [2024-06-27 21:39:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:39:06,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:39:06,733 INFO L175 Difference]: Start difference. First operand has 329 places, 454 transitions, 6810 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:39:06,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 483 transitions, 7951 flow [2024-06-27 21:39:09,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 483 transitions, 7422 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:09,858 INFO L231 Difference]: Finished difference. Result has 330 places, 457 transitions, 6435 flow [2024-06-27 21:39:09,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6435, PETRI_PLACES=330, PETRI_TRANSITIONS=457} [2024-06-27 21:39:09,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-27 21:39:09,859 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 457 transitions, 6435 flow [2024-06-27 21:39:09,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:09,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:09,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:09,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:39:09,859 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)] === [2024-06-27 21:39:09,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1608723041, now seen corresponding path program 2 times [2024-06-27 21:39:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:09,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447877712] [2024-06-27 21:39:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:09,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447877712] [2024-06-27 21:39:10,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447877712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:10,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:10,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:10,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302443902] [2024-06-27 21:39:10,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:10,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:10,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:10,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:10,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 457 transitions, 6435 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:10,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:10,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:10,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:11,741 INFO L124 PetriNetUnfolderBase]: 3642/5755 cut-off events. [2024-06-27 21:39:11,741 INFO L125 PetriNetUnfolderBase]: For 842813/842813 co-relation queries the response was YES. [2024-06-27 21:39:11,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51476 conditions, 5755 events. 3642/5755 cut-off events. For 842813/842813 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34677 event pairs, 758 based on Foata normal form. 1/5756 useless extension candidates. Maximal degree in co-relation 51321. Up to 5473 conditions per place. [2024-06-27 21:39:11,827 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 34 changer transitions 0/490 dead transitions. [2024-06-27 21:39:11,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 490 transitions, 7623 flow [2024-06-27 21:39:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:39:11,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:39:11,828 INFO L175 Difference]: Start difference. First operand has 330 places, 457 transitions, 6435 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:39:11,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 490 transitions, 7623 flow [2024-06-27 21:39:15,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 490 transitions, 7495 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:15,613 INFO L231 Difference]: Finished difference. Result has 334 places, 463 transitions, 6519 flow [2024-06-27 21:39:15,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6519, PETRI_PLACES=334, PETRI_TRANSITIONS=463} [2024-06-27 21:39:15,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-27 21:39:15,613 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 463 transitions, 6519 flow [2024-06-27 21:39:15,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:15,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:15,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:15,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:39:15,614 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)] === [2024-06-27 21:39:15,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1617296897, now seen corresponding path program 1 times [2024-06-27 21:39:15,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:15,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123579549] [2024-06-27 21:39:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:16,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:16,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123579549] [2024-06-27 21:39:16,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123579549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:16,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:16,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686790631] [2024-06-27 21:39:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:16,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:16,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:16,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:16,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 463 transitions, 6519 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:16,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:16,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:16,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:17,553 INFO L124 PetriNetUnfolderBase]: 3637/5748 cut-off events. [2024-06-27 21:39:17,553 INFO L125 PetriNetUnfolderBase]: For 855106/855106 co-relation queries the response was YES. [2024-06-27 21:39:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51631 conditions, 5748 events. 3637/5748 cut-off events. For 855106/855106 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34619 event pairs, 648 based on Foata normal form. 2/5750 useless extension candidates. Maximal degree in co-relation 51474. Up to 5457 conditions per place. [2024-06-27 21:39:17,641 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2024-06-27 21:39:17,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 492 transitions, 7651 flow [2024-06-27 21:39:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:39:17,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:39:17,643 INFO L175 Difference]: Start difference. First operand has 334 places, 463 transitions, 6519 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:39:17,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 492 transitions, 7651 flow [2024-06-27 21:39:20,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 492 transitions, 7510 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:20,918 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6487 flow [2024-06-27 21:39:20,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6487, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-27 21:39:20,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 21:39:20,919 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6487 flow [2024-06-27 21:39:20,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:20,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:20,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:20,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:39:20,919 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)] === [2024-06-27 21:39:20,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1617057887, now seen corresponding path program 2 times [2024-06-27 21:39:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:20,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196679035] [2024-06-27 21:39:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:20,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:21,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196679035] [2024-06-27 21:39:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196679035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:21,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688514131] [2024-06-27 21:39:21,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:21,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:21,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:21,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:21,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6487 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:21,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:21,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:21,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:22,821 INFO L124 PetriNetUnfolderBase]: 3645/5760 cut-off events. [2024-06-27 21:39:22,821 INFO L125 PetriNetUnfolderBase]: For 870244/870244 co-relation queries the response was YES. [2024-06-27 21:39:22,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51911 conditions, 5760 events. 3645/5760 cut-off events. For 870244/870244 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34781 event pairs, 762 based on Foata normal form. 2/5762 useless extension candidates. Maximal degree in co-relation 51753. Up to 5502 conditions per place. [2024-06-27 21:39:22,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 22 changer transitions 0/490 dead transitions. [2024-06-27 21:39:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 490 transitions, 7603 flow [2024-06-27 21:39:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:39:22,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:39:22,914 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6487 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:39:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 490 transitions, 7603 flow [2024-06-27 21:39:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 490 transitions, 7510 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:26,632 INFO L231 Difference]: Finished difference. Result has 338 places, 467 transitions, 6509 flow [2024-06-27 21:39:26,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6509, PETRI_PLACES=338, PETRI_TRANSITIONS=467} [2024-06-27 21:39:26,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-27 21:39:26,632 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 467 transitions, 6509 flow [2024-06-27 21:39:26,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:26,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:26,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:26,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:39:26,633 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)] === [2024-06-27 21:39:26,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1856603451, now seen corresponding path program 3 times [2024-06-27 21:39:26,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:26,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568918076] [2024-06-27 21:39:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:27,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568918076] [2024-06-27 21:39:27,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568918076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:27,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:27,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102636388] [2024-06-27 21:39:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:27,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:27,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:27,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:27,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 467 transitions, 6509 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:27,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:27,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:27,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:28,634 INFO L124 PetriNetUnfolderBase]: 3650/5770 cut-off events. [2024-06-27 21:39:28,635 INFO L125 PetriNetUnfolderBase]: For 882584/882588 co-relation queries the response was YES. [2024-06-27 21:39:28,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52160 conditions, 5770 events. 3650/5770 cut-off events. For 882584/882588 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34866 event pairs, 746 based on Foata normal form. 5/5775 useless extension candidates. Maximal degree in co-relation 52001. Up to 5428 conditions per place. [2024-06-27 21:39:28,712 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 45 changer transitions 0/495 dead transitions. [2024-06-27 21:39:28,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 495 transitions, 7690 flow [2024-06-27 21:39:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:39:28,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:39:28,713 INFO L175 Difference]: Start difference. First operand has 338 places, 467 transitions, 6509 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:39:28,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 495 transitions, 7690 flow [2024-06-27 21:39:31,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 495 transitions, 7587 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:31,963 INFO L231 Difference]: Finished difference. Result has 340 places, 470 transitions, 6608 flow [2024-06-27 21:39:31,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6608, PETRI_PLACES=340, PETRI_TRANSITIONS=470} [2024-06-27 21:39:31,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 21:39:31,964 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 470 transitions, 6608 flow [2024-06-27 21:39:31,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:31,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:31,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:39:31,964 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)] === [2024-06-27 21:39:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1305262803, now seen corresponding path program 4 times [2024-06-27 21:39:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59488734] [2024-06-27 21:39:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:32,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59488734] [2024-06-27 21:39:32,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59488734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:32,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663888733] [2024-06-27 21:39:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:32,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:32,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 470 transitions, 6608 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:32,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:32,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:32,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:33,889 INFO L124 PetriNetUnfolderBase]: 3655/5777 cut-off events. [2024-06-27 21:39:33,890 INFO L125 PetriNetUnfolderBase]: For 900010/900014 co-relation queries the response was YES. [2024-06-27 21:39:33,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52703 conditions, 5777 events. 3655/5777 cut-off events. For 900010/900014 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34923 event pairs, 748 based on Foata normal form. 5/5782 useless extension candidates. Maximal degree in co-relation 52543. Up to 5418 conditions per place. [2024-06-27 21:39:33,975 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 51 changer transitions 0/495 dead transitions. [2024-06-27 21:39:33,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 495 transitions, 7781 flow [2024-06-27 21:39:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:39:33,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:39:33,976 INFO L175 Difference]: Start difference. First operand has 340 places, 470 transitions, 6608 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:39:33,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 495 transitions, 7781 flow [2024-06-27 21:39:37,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 495 transitions, 7601 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:37,483 INFO L231 Difference]: Finished difference. Result has 342 places, 473 transitions, 6648 flow [2024-06-27 21:39:37,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6648, PETRI_PLACES=342, PETRI_TRANSITIONS=473} [2024-06-27 21:39:37,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-27 21:39:37,484 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 473 transitions, 6648 flow [2024-06-27 21:39:37,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:37,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:37,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:37,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:39:37,484 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)] === [2024-06-27 21:39:37,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash -131682913, now seen corresponding path program 5 times [2024-06-27 21:39:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:37,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879830660] [2024-06-27 21:39:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:37,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879830660] [2024-06-27 21:39:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879830660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:38,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:38,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224468783] [2024-06-27 21:39:38,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:38,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:38,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:38,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:38,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 473 transitions, 6648 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:38,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:38,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:38,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:39,412 INFO L124 PetriNetUnfolderBase]: 3660/5784 cut-off events. [2024-06-27 21:39:39,413 INFO L125 PetriNetUnfolderBase]: For 917793/917793 co-relation queries the response was YES. [2024-06-27 21:39:39,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53196 conditions, 5784 events. 3660/5784 cut-off events. For 917793/917793 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34964 event pairs, 758 based on Foata normal form. 1/5785 useless extension candidates. Maximal degree in co-relation 53035. Up to 5518 conditions per place. [2024-06-27 21:39:39,504 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 461 selfloop transitions, 27 changer transitions 0/493 dead transitions. [2024-06-27 21:39:39,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 493 transitions, 7798 flow [2024-06-27 21:39:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:39:39,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:39:39,505 INFO L175 Difference]: Start difference. First operand has 342 places, 473 transitions, 6648 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:39:39,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 493 transitions, 7798 flow [2024-06-27 21:39:42,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 493 transitions, 7600 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:42,526 INFO L231 Difference]: Finished difference. Result has 344 places, 476 transitions, 6628 flow [2024-06-27 21:39:42,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6628, PETRI_PLACES=344, PETRI_TRANSITIONS=476} [2024-06-27 21:39:42,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-27 21:39:42,526 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 476 transitions, 6628 flow [2024-06-27 21:39:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:42,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:42,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:39:42,526 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)] === [2024-06-27 21:39:42,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash -126921313, now seen corresponding path program 6 times [2024-06-27 21:39:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626589198] [2024-06-27 21:39:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:43,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:43,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626589198] [2024-06-27 21:39:43,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626589198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:43,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:43,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20240723] [2024-06-27 21:39:43,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:43,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:43,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 476 transitions, 6628 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:43,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:43,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:43,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:44,459 INFO L124 PetriNetUnfolderBase]: 3792/5994 cut-off events. [2024-06-27 21:39:44,459 INFO L125 PetriNetUnfolderBase]: For 942838/942842 co-relation queries the response was YES. [2024-06-27 21:39:44,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55192 conditions, 5994 events. 3792/5994 cut-off events. For 942838/942842 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36364 event pairs, 758 based on Foata normal form. 5/5997 useless extension candidates. Maximal degree in co-relation 55030. Up to 5537 conditions per place. [2024-06-27 21:39:44,550 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 460 selfloop transitions, 93 changer transitions 0/558 dead transitions. [2024-06-27 21:39:44,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 558 transitions, 9019 flow [2024-06-27 21:39:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:39:44,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 21:39:44,551 INFO L175 Difference]: Start difference. First operand has 344 places, 476 transitions, 6628 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:39:44,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 558 transitions, 9019 flow [2024-06-27 21:39:48,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 558 transitions, 8675 flow, removed 118 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:48,148 INFO L231 Difference]: Finished difference. Result has 351 places, 531 transitions, 7487 flow [2024-06-27 21:39:48,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7487, PETRI_PLACES=351, PETRI_TRANSITIONS=531} [2024-06-27 21:39:48,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-27 21:39:48,148 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 531 transitions, 7487 flow [2024-06-27 21:39:48,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:48,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:48,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:48,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:39:48,149 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)] === [2024-06-27 21:39:48,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:48,149 INFO L85 PathProgramCache]: Analyzing trace with hash 814462465, now seen corresponding path program 7 times [2024-06-27 21:39:48,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:48,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207489942] [2024-06-27 21:39:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:48,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:48,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:48,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207489942] [2024-06-27 21:39:48,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207489942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:48,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:48,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:48,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100612277] [2024-06-27 21:39:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:48,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:48,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:48,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:48,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 531 transitions, 7487 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:48,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:48,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:50,193 INFO L124 PetriNetUnfolderBase]: 3893/6155 cut-off events. [2024-06-27 21:39:50,193 INFO L125 PetriNetUnfolderBase]: For 973018/973022 co-relation queries the response was YES. [2024-06-27 21:39:50,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57192 conditions, 6155 events. 3893/6155 cut-off events. For 973018/973022 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37605 event pairs, 764 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 57026. Up to 5635 conditions per place. [2024-06-27 21:39:50,276 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 466 selfloop transitions, 141 changer transitions 0/612 dead transitions. [2024-06-27 21:39:50,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 612 transitions, 9965 flow [2024-06-27 21:39:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:39:50,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 21:39:50,277 INFO L175 Difference]: Start difference. First operand has 351 places, 531 transitions, 7487 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:39:50,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 612 transitions, 9965 flow [2024-06-27 21:39:54,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 612 transitions, 9711 flow, removed 126 selfloop flow, removed 1 redundant places. [2024-06-27 21:39:54,371 INFO L231 Difference]: Finished difference. Result has 362 places, 587 transitions, 8623 flow [2024-06-27 21:39:54,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7359, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8623, PETRI_PLACES=362, PETRI_TRANSITIONS=587} [2024-06-27 21:39:54,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 21:39:54,371 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 587 transitions, 8623 flow [2024-06-27 21:39:54,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:54,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:54,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:54,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:39:54,372 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)] === [2024-06-27 21:39:54,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash -524353245, now seen corresponding path program 3 times [2024-06-27 21:39:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455644846] [2024-06-27 21:39:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455644846] [2024-06-27 21:39:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455644846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:54,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:54,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:54,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223299036] [2024-06-27 21:39:54,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:54,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:54,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:54,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:39:54,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 587 transitions, 8623 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:54,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:54,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:39:54,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:56,466 INFO L124 PetriNetUnfolderBase]: 3901/6164 cut-off events. [2024-06-27 21:39:56,466 INFO L125 PetriNetUnfolderBase]: For 999562/999562 co-relation queries the response was YES. [2024-06-27 21:39:56,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58370 conditions, 6164 events. 3901/6164 cut-off events. For 999562/999562 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37652 event pairs, 751 based on Foata normal form. 2/6166 useless extension candidates. Maximal degree in co-relation 58198. Up to 5832 conditions per place. [2024-06-27 21:39:56,565 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 559 selfloop transitions, 48 changer transitions 0/612 dead transitions. [2024-06-27 21:39:56,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 612 transitions, 10017 flow [2024-06-27 21:39:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:39:56,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 21:39:56,566 INFO L175 Difference]: Start difference. First operand has 362 places, 587 transitions, 8623 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:39:56,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 612 transitions, 10017 flow [2024-06-27 21:40:00,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 612 transitions, 9788 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 21:40:00,146 INFO L231 Difference]: Finished difference. Result has 370 places, 592 transitions, 8645 flow [2024-06-27 21:40:00,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8394, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8645, PETRI_PLACES=370, PETRI_TRANSITIONS=592} [2024-06-27 21:40:00,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 21:40:00,146 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 592 transitions, 8645 flow [2024-06-27 21:40:00,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:00,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:00,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:00,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:40:00,147 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)] === [2024-06-27 21:40:00,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 157018713, now seen corresponding path program 1 times [2024-06-27 21:40:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:00,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226836615] [2024-06-27 21:40:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:00,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:00,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226836615] [2024-06-27 21:40:00,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226836615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:00,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:00,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:00,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175132161] [2024-06-27 21:40:00,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:00,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:00,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:00,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 592 transitions, 8645 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:00,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:00,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:00,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:02,577 INFO L124 PetriNetUnfolderBase]: 3916/6198 cut-off events. [2024-06-27 21:40:02,577 INFO L125 PetriNetUnfolderBase]: For 1009907/1009909 co-relation queries the response was YES. [2024-06-27 21:40:02,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58626 conditions, 6198 events. 3916/6198 cut-off events. For 1009907/1009909 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38022 event pairs, 841 based on Foata normal form. 1/6199 useless extension candidates. Maximal degree in co-relation 58451. Up to 5742 conditions per place. [2024-06-27 21:40:02,678 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 76 changer transitions 0/628 dead transitions. [2024-06-27 21:40:02,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 628 transitions, 10147 flow [2024-06-27 21:40:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:40:02,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:40:02,679 INFO L175 Difference]: Start difference. First operand has 370 places, 592 transitions, 8645 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:40:02,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 628 transitions, 10147 flow [2024-06-27 21:40:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 628 transitions, 10036 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:40:06,708 INFO L231 Difference]: Finished difference. Result has 376 places, 598 transitions, 8839 flow [2024-06-27 21:40:06,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8534, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8839, PETRI_PLACES=376, PETRI_TRANSITIONS=598} [2024-06-27 21:40:06,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 21:40:06,709 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 598 transitions, 8839 flow [2024-06-27 21:40:06,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:06,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:06,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:06,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:40:06,710 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)] === [2024-06-27 21:40:06,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1110725589, now seen corresponding path program 4 times [2024-06-27 21:40:06,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:06,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444905170] [2024-06-27 21:40:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:06,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444905170] [2024-06-27 21:40:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444905170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:07,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:07,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350505943] [2024-06-27 21:40:07,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:07,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:07,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 598 transitions, 8839 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:07,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:07,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:07,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:08,903 INFO L124 PetriNetUnfolderBase]: 3911/6173 cut-off events. [2024-06-27 21:40:08,903 INFO L125 PetriNetUnfolderBase]: For 1020077/1020077 co-relation queries the response was YES. [2024-06-27 21:40:08,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58488 conditions, 6173 events. 3911/6173 cut-off events. For 1020077/1020077 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37651 event pairs, 762 based on Foata normal form. 2/6175 useless extension candidates. Maximal degree in co-relation 58312. Up to 5831 conditions per place. [2024-06-27 21:40:09,002 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 556 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2024-06-27 21:40:09,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 616 transitions, 10197 flow [2024-06-27 21:40:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:40:09,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:40:09,003 INFO L175 Difference]: Start difference. First operand has 376 places, 598 transitions, 8839 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:40:09,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 616 transitions, 10197 flow [2024-06-27 21:40:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 616 transitions, 10036 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:13,236 INFO L231 Difference]: Finished difference. Result has 377 places, 600 transitions, 8881 flow [2024-06-27 21:40:13,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8678, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8881, PETRI_PLACES=377, PETRI_TRANSITIONS=600} [2024-06-27 21:40:13,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-27 21:40:13,237 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 600 transitions, 8881 flow [2024-06-27 21:40:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:13,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:13,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:40:13,238 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)] === [2024-06-27 21:40:13,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1934574679, now seen corresponding path program 8 times [2024-06-27 21:40:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:13,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885924458] [2024-06-27 21:40:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885924458] [2024-06-27 21:40:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885924458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334502352] [2024-06-27 21:40:13,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:13,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:13,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:13,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 600 transitions, 8881 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:13,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:13,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:13,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:15,414 INFO L124 PetriNetUnfolderBase]: 3921/6190 cut-off events. [2024-06-27 21:40:15,415 INFO L125 PetriNetUnfolderBase]: For 1038410/1038410 co-relation queries the response was YES. [2024-06-27 21:40:15,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58842 conditions, 6190 events. 3921/6190 cut-off events. For 1038410/1038410 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37783 event pairs, 750 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 58666. Up to 5758 conditions per place. [2024-06-27 21:40:15,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 541 selfloop transitions, 80 changer transitions 0/626 dead transitions. [2024-06-27 21:40:15,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 626 transitions, 10450 flow [2024-06-27 21:40:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:40:15,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 21:40:15,503 INFO L175 Difference]: Start difference. First operand has 377 places, 600 transitions, 8881 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:40:15,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 626 transitions, 10450 flow [2024-06-27 21:40:20,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 626 transitions, 10296 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:20,069 INFO L231 Difference]: Finished difference. Result has 380 places, 606 transitions, 9147 flow [2024-06-27 21:40:20,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8727, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9147, PETRI_PLACES=380, PETRI_TRANSITIONS=606} [2024-06-27 21:40:20,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-27 21:40:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 606 transitions, 9147 flow [2024-06-27 21:40:20,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:20,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:20,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:20,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:40:20,071 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)] === [2024-06-27 21:40:20,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash 613194951, now seen corresponding path program 9 times [2024-06-27 21:40:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:20,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932408708] [2024-06-27 21:40:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932408708] [2024-06-27 21:40:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932408708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:20,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:20,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:20,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830160504] [2024-06-27 21:40:20,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:20,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:20,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:20,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:20,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 606 transitions, 9147 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:20,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:20,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:20,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:22,127 INFO L124 PetriNetUnfolderBase]: 3915/6182 cut-off events. [2024-06-27 21:40:22,127 INFO L125 PetriNetUnfolderBase]: For 1023451/1023451 co-relation queries the response was YES. [2024-06-27 21:40:22,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58428 conditions, 6182 events. 3915/6182 cut-off events. For 1023451/1023451 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37742 event pairs, 749 based on Foata normal form. 2/6181 useless extension candidates. Maximal degree in co-relation 58251. Up to 5738 conditions per place. [2024-06-27 21:40:22,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 530 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-27 21:40:22,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 624 transitions, 10468 flow [2024-06-27 21:40:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:40:22,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:40:22,223 INFO L175 Difference]: Start difference. First operand has 380 places, 606 transitions, 9147 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:40:22,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 624 transitions, 10468 flow [2024-06-27 21:40:26,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 624 transitions, 9988 flow, removed 164 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:26,705 INFO L231 Difference]: Finished difference. Result has 382 places, 606 transitions, 8854 flow [2024-06-27 21:40:26,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8854, PETRI_PLACES=382, PETRI_TRANSITIONS=606} [2024-06-27 21:40:26,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-27 21:40:26,705 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 606 transitions, 8854 flow [2024-06-27 21:40:26,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:26,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:26,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:26,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:40:26,706 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)] === [2024-06-27 21:40:26,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash 119694731, now seen corresponding path program 10 times [2024-06-27 21:40:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:26,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741767443] [2024-06-27 21:40:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:27,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:27,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741767443] [2024-06-27 21:40:27,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741767443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:27,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:27,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627099372] [2024-06-27 21:40:27,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:27,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:27,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:27,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 606 transitions, 8854 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:27,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:27,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:27,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:28,857 INFO L124 PetriNetUnfolderBase]: 3933/6211 cut-off events. [2024-06-27 21:40:28,857 INFO L125 PetriNetUnfolderBase]: For 1045831/1045831 co-relation queries the response was YES. [2024-06-27 21:40:28,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58793 conditions, 6211 events. 3933/6211 cut-off events. For 1045831/1045831 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 37943 event pairs, 748 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 58615. Up to 5654 conditions per place. [2024-06-27 21:40:28,946 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 118 changer transitions 0/628 dead transitions. [2024-06-27 21:40:28,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 628 transitions, 10619 flow [2024-06-27 21:40:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:40:28,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 21:40:28,948 INFO L175 Difference]: Start difference. First operand has 382 places, 606 transitions, 8854 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:40:28,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 628 transitions, 10619 flow [2024-06-27 21:40:33,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 628 transitions, 10372 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:33,326 INFO L231 Difference]: Finished difference. Result has 384 places, 613 transitions, 9094 flow [2024-06-27 21:40:33,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8607, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9094, PETRI_PLACES=384, PETRI_TRANSITIONS=613} [2024-06-27 21:40:33,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-27 21:40:33,327 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 613 transitions, 9094 flow [2024-06-27 21:40:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:33,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:40:33,327 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)] === [2024-06-27 21:40:33,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 7880095, now seen corresponding path program 11 times [2024-06-27 21:40:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278812250] [2024-06-27 21:40:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:33,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:33,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278812250] [2024-06-27 21:40:33,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278812250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:33,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:33,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:33,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853939666] [2024-06-27 21:40:33,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:34,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:34,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 613 transitions, 9094 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:34,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:34,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:34,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:35,539 INFO L124 PetriNetUnfolderBase]: 3967/6267 cut-off events. [2024-06-27 21:40:35,539 INFO L125 PetriNetUnfolderBase]: For 1092635/1092639 co-relation queries the response was YES. [2024-06-27 21:40:35,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 6267 events. 3967/6267 cut-off events. For 1092635/1092639 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38349 event pairs, 784 based on Foata normal form. 6/6270 useless extension candidates. Maximal degree in co-relation 60285. Up to 5497 conditions per place. [2024-06-27 21:40:35,629 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 455 selfloop transitions, 183 changer transitions 0/643 dead transitions. [2024-06-27 21:40:35,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 643 transitions, 11672 flow [2024-06-27 21:40:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:40:35,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 21:40:35,631 INFO L175 Difference]: Start difference. First operand has 384 places, 613 transitions, 9094 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:40:35,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 643 transitions, 11672 flow [2024-06-27 21:40:41,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 643 transitions, 11438 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-27 21:40:41,316 INFO L231 Difference]: Finished difference. Result has 389 places, 628 transitions, 9795 flow [2024-06-27 21:40:41,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8860, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9795, PETRI_PLACES=389, PETRI_TRANSITIONS=628} [2024-06-27 21:40:41,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-27 21:40:41,316 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 628 transitions, 9795 flow [2024-06-27 21:40:41,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:41,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:41,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:41,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:40:41,316 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)] === [2024-06-27 21:40:41,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash 962401577, now seen corresponding path program 12 times [2024-06-27 21:40:41,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:41,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378176435] [2024-06-27 21:40:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:41,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:41,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:41,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378176435] [2024-06-27 21:40:41,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378176435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:41,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:41,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:41,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082857065] [2024-06-27 21:40:41,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:41,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:41,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 628 transitions, 9795 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:41,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:41,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:41,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:43,582 INFO L124 PetriNetUnfolderBase]: 3961/6259 cut-off events. [2024-06-27 21:40:43,582 INFO L125 PetriNetUnfolderBase]: For 1098966/1098966 co-relation queries the response was YES. [2024-06-27 21:40:43,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60844 conditions, 6259 events. 3961/6259 cut-off events. For 1098966/1098966 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38379 event pairs, 763 based on Foata normal form. 2/6258 useless extension candidates. Maximal degree in co-relation 60663. Up to 5865 conditions per place. [2024-06-27 21:40:43,668 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 575 selfloop transitions, 58 changer transitions 0/638 dead transitions. [2024-06-27 21:40:43,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 638 transitions, 11093 flow [2024-06-27 21:40:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:40:43,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:40:43,669 INFO L175 Difference]: Start difference. First operand has 389 places, 628 transitions, 9795 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:40:43,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 638 transitions, 11093 flow [2024-06-27 21:40:48,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 638 transitions, 10707 flow, removed 157 selfloop flow, removed 3 redundant places. [2024-06-27 21:40:48,517 INFO L231 Difference]: Finished difference. Result has 394 places, 628 transitions, 9532 flow [2024-06-27 21:40:48,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9532, PETRI_PLACES=394, PETRI_TRANSITIONS=628} [2024-06-27 21:40:48,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 21:40:48,518 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 628 transitions, 9532 flow [2024-06-27 21:40:48,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:48,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:48,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:48,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:40:48,518 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)] === [2024-06-27 21:40:48,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2119169439, now seen corresponding path program 13 times [2024-06-27 21:40:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:48,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537850822] [2024-06-27 21:40:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:49,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:49,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537850822] [2024-06-27 21:40:49,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537850822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:49,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:49,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:49,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686312794] [2024-06-27 21:40:49,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:49,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:49,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:49,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:49,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 628 transitions, 9532 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:49,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:49,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:50,777 INFO L124 PetriNetUnfolderBase]: 3955/6249 cut-off events. [2024-06-27 21:40:50,777 INFO L125 PetriNetUnfolderBase]: For 1089773/1089777 co-relation queries the response was YES. [2024-06-27 21:40:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59668 conditions, 6249 events. 3955/6249 cut-off events. For 1089773/1089777 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38308 event pairs, 785 based on Foata normal form. 6/6252 useless extension candidates. Maximal degree in co-relation 59485. Up to 5487 conditions per place. [2024-06-27 21:40:50,863 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 455 selfloop transitions, 181 changer transitions 0/641 dead transitions. [2024-06-27 21:40:50,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 641 transitions, 11311 flow [2024-06-27 21:40:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:40:50,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:40:50,864 INFO L175 Difference]: Start difference. First operand has 394 places, 628 transitions, 9532 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:40:50,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 641 transitions, 11311 flow [2024-06-27 21:40:54,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 641 transitions, 11020 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-27 21:40:54,893 INFO L231 Difference]: Finished difference. Result has 394 places, 628 transitions, 9610 flow [2024-06-27 21:40:54,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9241, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9610, PETRI_PLACES=394, PETRI_TRANSITIONS=628} [2024-06-27 21:40:54,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 21:40:54,894 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 628 transitions, 9610 flow [2024-06-27 21:40:54,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:54,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:54,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:54,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:40:54,894 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)] === [2024-06-27 21:40:54,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash 936643391, now seen corresponding path program 2 times [2024-06-27 21:40:54,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:54,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350219180] [2024-06-27 21:40:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:54,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:55,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:55,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350219180] [2024-06-27 21:40:55,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350219180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:55,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:55,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79540424] [2024-06-27 21:40:55,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:55,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:40:55,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 628 transitions, 9610 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:55,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:55,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:40:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:57,339 INFO L124 PetriNetUnfolderBase]: 3952/6262 cut-off events. [2024-06-27 21:40:57,340 INFO L125 PetriNetUnfolderBase]: For 1092670/1092672 co-relation queries the response was YES. [2024-06-27 21:40:57,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59739 conditions, 6262 events. 3952/6262 cut-off events. For 1092670/1092672 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 38552 event pairs, 851 based on Foata normal form. 1/6263 useless extension candidates. Maximal degree in co-relation 59556. Up to 5780 conditions per place. [2024-06-27 21:40:57,434 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 81 changer transitions 0/652 dead transitions. [2024-06-27 21:40:57,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 652 transitions, 11013 flow [2024-06-27 21:40:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:40:57,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:40:57,435 INFO L175 Difference]: Start difference. First operand has 394 places, 628 transitions, 9610 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:40:57,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 652 transitions, 11013 flow [2024-06-27 21:41:02,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 652 transitions, 10425 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 21:41:02,546 INFO L231 Difference]: Finished difference. Result has 393 places, 628 transitions, 9204 flow [2024-06-27 21:41:02,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9022, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9204, PETRI_PLACES=393, PETRI_TRANSITIONS=628} [2024-06-27 21:41:02,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-27 21:41:02,546 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 628 transitions, 9204 flow [2024-06-27 21:41:02,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:02,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:02,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:02,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:41:02,547 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)] === [2024-06-27 21:41:02,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash 144195489, now seen corresponding path program 3 times [2024-06-27 21:41:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:02,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43784651] [2024-06-27 21:41:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:02,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:03,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43784651] [2024-06-27 21:41:03,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43784651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:03,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:03,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:03,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208320431] [2024-06-27 21:41:03,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:03,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:03,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:03,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:03,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:03,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:03,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 628 transitions, 9204 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:03,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:03,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:03,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:04,967 INFO L124 PetriNetUnfolderBase]: 3957/6253 cut-off events. [2024-06-27 21:41:04,967 INFO L125 PetriNetUnfolderBase]: For 1108389/1108389 co-relation queries the response was YES. [2024-06-27 21:41:05,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59253 conditions, 6253 events. 3957/6253 cut-off events. For 1108389/1108389 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38281 event pairs, 771 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 59072. Up to 5796 conditions per place. [2024-06-27 21:41:05,057 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 76 changer transitions 0/651 dead transitions. [2024-06-27 21:41:05,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 651 transitions, 10650 flow [2024-06-27 21:41:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:41:05,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:41:05,058 INFO L175 Difference]: Start difference. First operand has 393 places, 628 transitions, 9204 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:41:05,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 651 transitions, 10650 flow [2024-06-27 21:41:09,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 651 transitions, 10464 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:41:09,864 INFO L231 Difference]: Finished difference. Result has 393 places, 631 transitions, 9260 flow [2024-06-27 21:41:09,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9018, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9260, PETRI_PLACES=393, PETRI_TRANSITIONS=631} [2024-06-27 21:41:09,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-27 21:41:09,865 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 631 transitions, 9260 flow [2024-06-27 21:41:09,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:09,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:09,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:41:09,865 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)] === [2024-06-27 21:41:09,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1770358135, now seen corresponding path program 4 times [2024-06-27 21:41:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:09,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814254573] [2024-06-27 21:41:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:10,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:10,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814254573] [2024-06-27 21:41:10,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814254573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:10,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:10,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:10,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278966009] [2024-06-27 21:41:10,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:10,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:10,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 631 transitions, 9260 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:10,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:12,372 INFO L124 PetriNetUnfolderBase]: 3951/6245 cut-off events. [2024-06-27 21:41:12,373 INFO L125 PetriNetUnfolderBase]: For 1083679/1083679 co-relation queries the response was YES. [2024-06-27 21:41:12,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58774 conditions, 6245 events. 3951/6245 cut-off events. For 1083679/1083679 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38283 event pairs, 763 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 58593. Up to 5674 conditions per place. [2024-06-27 21:41:12,455 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 107 changer transitions 0/651 dead transitions. [2024-06-27 21:41:12,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 651 transitions, 10881 flow [2024-06-27 21:41:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:41:12,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 21:41:12,457 INFO L175 Difference]: Start difference. First operand has 393 places, 631 transitions, 9260 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:41:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 651 transitions, 10881 flow [2024-06-27 21:41:16,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 651 transitions, 10708 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:41:16,808 INFO L231 Difference]: Finished difference. Result has 395 places, 632 transitions, 9338 flow [2024-06-27 21:41:16,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9091, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9338, PETRI_PLACES=395, PETRI_TRANSITIONS=632} [2024-06-27 21:41:16,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-27 21:41:16,808 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 632 transitions, 9338 flow [2024-06-27 21:41:16,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:16,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:16,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:16,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:41:16,809 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)] === [2024-06-27 21:41:16,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 397662399, now seen corresponding path program 5 times [2024-06-27 21:41:16,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:16,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732791151] [2024-06-27 21:41:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:17,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732791151] [2024-06-27 21:41:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732791151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:17,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:17,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:17,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493539435] [2024-06-27 21:41:17,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:17,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:17,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:17,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:17,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 632 transitions, 9338 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:17,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:17,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:19,078 INFO L124 PetriNetUnfolderBase]: 3934/6216 cut-off events. [2024-06-27 21:41:19,078 INFO L125 PetriNetUnfolderBase]: For 1070490/1070490 co-relation queries the response was YES. [2024-06-27 21:41:19,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58539 conditions, 6216 events. 3934/6216 cut-off events. For 1070490/1070490 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38050 event pairs, 767 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 58358. Up to 5760 conditions per place. [2024-06-27 21:41:19,170 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 575 selfloop transitions, 73 changer transitions 0/653 dead transitions. [2024-06-27 21:41:19,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 653 transitions, 10725 flow [2024-06-27 21:41:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:41:19,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 21:41:19,171 INFO L175 Difference]: Start difference. First operand has 395 places, 632 transitions, 9338 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:41:19,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 653 transitions, 10725 flow [2024-06-27 21:41:23,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 653 transitions, 10534 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:41:23,931 INFO L231 Difference]: Finished difference. Result has 398 places, 632 transitions, 9305 flow [2024-06-27 21:41:23,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9147, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9305, PETRI_PLACES=398, PETRI_TRANSITIONS=632} [2024-06-27 21:41:23,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-27 21:41:23,932 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 632 transitions, 9305 flow [2024-06-27 21:41:23,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:23,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:23,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:23,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:41:23,933 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)] === [2024-06-27 21:41:23,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:23,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1917705847, now seen corresponding path program 1 times [2024-06-27 21:41:23,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:23,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657647109] [2024-06-27 21:41:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:23,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:24,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:24,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657647109] [2024-06-27 21:41:24,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657647109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:24,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:24,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064244150] [2024-06-27 21:41:24,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:24,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:24,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 632 transitions, 9305 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:24,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:24,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:24,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:26,091 INFO L124 PetriNetUnfolderBase]: 3949/6247 cut-off events. [2024-06-27 21:41:26,091 INFO L125 PetriNetUnfolderBase]: For 1084472/1084472 co-relation queries the response was YES. [2024-06-27 21:41:26,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58625 conditions, 6247 events. 3949/6247 cut-off events. For 1084472/1084472 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 38341 event pairs, 746 based on Foata normal form. 3/6249 useless extension candidates. Maximal degree in co-relation 58443. Up to 5510 conditions per place. [2024-06-27 21:41:26,179 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 133 changer transitions 0/652 dead transitions. [2024-06-27 21:41:26,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 652 transitions, 10741 flow [2024-06-27 21:41:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:41:26,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:41:26,181 INFO L175 Difference]: Start difference. First operand has 398 places, 632 transitions, 9305 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:41:26,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 652 transitions, 10741 flow [2024-06-27 21:41:30,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 652 transitions, 10465 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 21:41:30,150 INFO L231 Difference]: Finished difference. Result has 396 places, 636 transitions, 9396 flow [2024-06-27 21:41:30,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9029, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9396, PETRI_PLACES=396, PETRI_TRANSITIONS=636} [2024-06-27 21:41:30,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-27 21:41:30,150 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 636 transitions, 9396 flow [2024-06-27 21:41:30,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:30,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:30,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:30,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:41:30,151 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)] === [2024-06-27 21:41:30,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2085754357, now seen corresponding path program 2 times [2024-06-27 21:41:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:30,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181901496] [2024-06-27 21:41:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:30,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:30,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181901496] [2024-06-27 21:41:30,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181901496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:30,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:30,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066547913] [2024-06-27 21:41:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:30,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:30,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 636 transitions, 9396 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:30,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:30,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:32,201 INFO L124 PetriNetUnfolderBase]: 3942/6241 cut-off events. [2024-06-27 21:41:32,201 INFO L125 PetriNetUnfolderBase]: For 1063316/1063316 co-relation queries the response was YES. [2024-06-27 21:41:32,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58586 conditions, 6241 events. 3942/6241 cut-off events. For 1063316/1063316 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 38319 event pairs, 756 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 58404. Up to 5855 conditions per place. [2024-06-27 21:41:32,296 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 591 selfloop transitions, 58 changer transitions 0/654 dead transitions. [2024-06-27 21:41:32,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 654 transitions, 10830 flow [2024-06-27 21:41:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:41:32,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 21:41:32,298 INFO L175 Difference]: Start difference. First operand has 396 places, 636 transitions, 9396 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:41:32,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 654 transitions, 10830 flow [2024-06-27 21:41:35,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 654 transitions, 10456 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:41:35,984 INFO L231 Difference]: Finished difference. Result has 399 places, 640 transitions, 9242 flow [2024-06-27 21:41:35,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9242, PETRI_PLACES=399, PETRI_TRANSITIONS=640} [2024-06-27 21:41:35,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 21:41:35,985 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 640 transitions, 9242 flow [2024-06-27 21:41:35,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:35,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:35,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:35,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:41:35,985 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)] === [2024-06-27 21:41:35,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1903995215, now seen corresponding path program 3 times [2024-06-27 21:41:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:35,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920318031] [2024-06-27 21:41:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:36,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:36,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920318031] [2024-06-27 21:41:36,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920318031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:36,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:36,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138872097] [2024-06-27 21:41:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:36,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:36,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:36,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:36,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 640 transitions, 9242 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:36,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:36,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:36,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:38,408 INFO L124 PetriNetUnfolderBase]: 3947/6243 cut-off events. [2024-06-27 21:41:38,408 INFO L125 PetriNetUnfolderBase]: For 1080383/1080387 co-relation queries the response was YES. [2024-06-27 21:41:38,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58474 conditions, 6243 events. 3947/6243 cut-off events. For 1080383/1080387 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38286 event pairs, 765 based on Foata normal form. 5/6247 useless extension candidates. Maximal degree in co-relation 58291. Up to 5795 conditions per place. [2024-06-27 21:41:38,498 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 566 selfloop transitions, 82 changer transitions 0/653 dead transitions. [2024-06-27 21:41:38,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 653 transitions, 10638 flow [2024-06-27 21:41:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:41:38,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:41:38,499 INFO L175 Difference]: Start difference. First operand has 399 places, 640 transitions, 9242 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:41:38,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 653 transitions, 10638 flow [2024-06-27 21:41:43,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 653 transitions, 10422 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:41:43,070 INFO L231 Difference]: Finished difference. Result has 400 places, 643 transitions, 9270 flow [2024-06-27 21:41:43,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9270, PETRI_PLACES=400, PETRI_TRANSITIONS=643} [2024-06-27 21:41:43,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-27 21:41:43,071 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 643 transitions, 9270 flow [2024-06-27 21:41:43,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:43,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:43,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:43,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:41:43,071 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)] === [2024-06-27 21:41:43,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 403390371, now seen corresponding path program 4 times [2024-06-27 21:41:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:43,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344390148] [2024-06-27 21:41:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:43,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:43,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344390148] [2024-06-27 21:41:43,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344390148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:43,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:43,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:43,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303610005] [2024-06-27 21:41:43,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:43,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:43,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:43,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 643 transitions, 9270 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:43,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:43,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:43,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:45,214 INFO L124 PetriNetUnfolderBase]: 3960/6271 cut-off events. [2024-06-27 21:41:45,214 INFO L125 PetriNetUnfolderBase]: For 1104717/1104721 co-relation queries the response was YES. [2024-06-27 21:41:45,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58939 conditions, 6271 events. 3960/6271 cut-off events. For 1104717/1104721 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38584 event pairs, 767 based on Foata normal form. 5/6275 useless extension candidates. Maximal degree in co-relation 58755. Up to 5800 conditions per place. [2024-06-27 21:41:45,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 563 selfloop transitions, 94 changer transitions 0/662 dead transitions. [2024-06-27 21:41:45,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 662 transitions, 11019 flow [2024-06-27 21:41:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:41:45,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 21:41:45,310 INFO L175 Difference]: Start difference. First operand has 400 places, 643 transitions, 9270 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:41:45,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 662 transitions, 11019 flow [2024-06-27 21:41:50,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 662 transitions, 10817 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:41:50,484 INFO L231 Difference]: Finished difference. Result has 404 places, 650 transitions, 9453 flow [2024-06-27 21:41:50,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9068, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9453, PETRI_PLACES=404, PETRI_TRANSITIONS=650} [2024-06-27 21:41:50,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-27 21:41:50,485 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 650 transitions, 9453 flow [2024-06-27 21:41:50,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:50,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:50,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:50,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:41:50,486 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)] === [2024-06-27 21:41:50,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash 858302463, now seen corresponding path program 5 times [2024-06-27 21:41:50,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942419722] [2024-06-27 21:41:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:50,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942419722] [2024-06-27 21:41:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942419722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:51,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:51,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207192177] [2024-06-27 21:41:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:51,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:51,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 650 transitions, 9453 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:51,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:51,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:51,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:52,688 INFO L124 PetriNetUnfolderBase]: 3953/6257 cut-off events. [2024-06-27 21:41:52,688 INFO L125 PetriNetUnfolderBase]: For 1114798/1114802 co-relation queries the response was YES. [2024-06-27 21:41:52,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58948 conditions, 6257 events. 3953/6257 cut-off events. For 1114798/1114802 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38457 event pairs, 767 based on Foata normal form. 5/6261 useless extension candidates. Maximal degree in co-relation 58762. Up to 5743 conditions per place. [2024-06-27 21:41:52,784 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 125 changer transitions 0/667 dead transitions. [2024-06-27 21:41:52,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 667 transitions, 11149 flow [2024-06-27 21:41:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:41:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:41:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:41:52,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-27 21:41:52,785 INFO L175 Difference]: Start difference. First operand has 404 places, 650 transitions, 9453 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:41:52,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 667 transitions, 11149 flow [2024-06-27 21:41:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 667 transitions, 10915 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:41:57,066 INFO L231 Difference]: Finished difference. Result has 409 places, 654 transitions, 9613 flow [2024-06-27 21:41:57,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9225, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9613, PETRI_PLACES=409, PETRI_TRANSITIONS=654} [2024-06-27 21:41:57,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 21:41:57,066 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 654 transitions, 9613 flow [2024-06-27 21:41:57,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:57,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:57,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:57,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:41:57,067 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)] === [2024-06-27 21:41:57,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1409426453, now seen corresponding path program 6 times [2024-06-27 21:41:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354001848] [2024-06-27 21:41:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:57,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354001848] [2024-06-27 21:41:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354001848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:57,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:57,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589696646] [2024-06-27 21:41:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:57,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:41:57,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 654 transitions, 9613 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:57,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:57,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:41:57,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:59,274 INFO L124 PetriNetUnfolderBase]: 3958/6274 cut-off events. [2024-06-27 21:41:59,275 INFO L125 PetriNetUnfolderBase]: For 1115487/1115489 co-relation queries the response was YES. [2024-06-27 21:41:59,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59158 conditions, 6274 events. 3958/6274 cut-off events. For 1115487/1115489 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38696 event pairs, 783 based on Foata normal form. 1/6274 useless extension candidates. Maximal degree in co-relation 58970. Up to 5148 conditions per place. [2024-06-27 21:41:59,366 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 448 selfloop transitions, 217 changer transitions 0/670 dead transitions. [2024-06-27 21:41:59,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 670 transitions, 11310 flow [2024-06-27 21:41:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:41:59,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:41:59,367 INFO L175 Difference]: Start difference. First operand has 409 places, 654 transitions, 9613 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:41:59,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 670 transitions, 11310 flow [2024-06-27 21:42:03,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 670 transitions, 10934 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:03,871 INFO L231 Difference]: Finished difference. Result has 409 places, 657 transitions, 9764 flow [2024-06-27 21:42:03,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9250, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9764, PETRI_PLACES=409, PETRI_TRANSITIONS=657} [2024-06-27 21:42:03,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 21:42:03,872 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 657 transitions, 9764 flow [2024-06-27 21:42:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:03,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:03,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:03,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:42:03,873 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)] === [2024-06-27 21:42:03,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1159452651, now seen corresponding path program 7 times [2024-06-27 21:42:03,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:03,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589452006] [2024-06-27 21:42:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:03,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589452006] [2024-06-27 21:42:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589452006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:04,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:04,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:42:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758352865] [2024-06-27 21:42:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:42:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:42:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:42:04,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:04,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 657 transitions, 9764 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:04,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:04,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:04,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:05,959 INFO L124 PetriNetUnfolderBase]: 3948/6247 cut-off events. [2024-06-27 21:42:05,959 INFO L125 PetriNetUnfolderBase]: For 1107943/1107947 co-relation queries the response was YES. [2024-06-27 21:42:06,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59037 conditions, 6247 events. 3948/6247 cut-off events. For 1107943/1107947 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38369 event pairs, 777 based on Foata normal form. 6/6252 useless extension candidates. Maximal degree in co-relation 58848. Up to 5776 conditions per place. [2024-06-27 21:42:06,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 569 selfloop transitions, 94 changer transitions 0/668 dead transitions. [2024-06-27 21:42:06,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 668 transitions, 11124 flow [2024-06-27 21:42:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:42:06,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 21:42:06,057 INFO L175 Difference]: Start difference. First operand has 409 places, 657 transitions, 9764 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:42:06,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 668 transitions, 11124 flow [2024-06-27 21:42:11,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 668 transitions, 10641 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:11,613 INFO L231 Difference]: Finished difference. Result has 413 places, 657 transitions, 9480 flow [2024-06-27 21:42:11,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9281, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9480, PETRI_PLACES=413, PETRI_TRANSITIONS=657} [2024-06-27 21:42:11,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 21:42:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 657 transitions, 9480 flow [2024-06-27 21:42:11,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:11,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:11,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:42:11,615 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)] === [2024-06-27 21:42:11,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1027188494, now seen corresponding path program 1 times [2024-06-27 21:42:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:11,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199626069] [2024-06-27 21:42:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199626069] [2024-06-27 21:42:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199626069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:12,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328073119] [2024-06-27 21:42:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:12,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:12,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:12,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:12,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 657 transitions, 9480 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:12,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:12,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:12,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:14,166 INFO L124 PetriNetUnfolderBase]: 3993/6324 cut-off events. [2024-06-27 21:42:14,166 INFO L125 PetriNetUnfolderBase]: For 1165083/1165083 co-relation queries the response was YES. [2024-06-27 21:42:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59848 conditions, 6324 events. 3993/6324 cut-off events. For 1165083/1165083 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38940 event pairs, 666 based on Foata normal form. 4/6327 useless extension candidates. Maximal degree in co-relation 59659. Up to 5685 conditions per place. [2024-06-27 21:42:14,263 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 595 selfloop transitions, 87 changer transitions 0/687 dead transitions. [2024-06-27 21:42:14,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 687 transitions, 11364 flow [2024-06-27 21:42:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:42:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:42:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:42:14,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-27 21:42:14,265 INFO L175 Difference]: Start difference. First operand has 413 places, 657 transitions, 9480 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:42:14,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 687 transitions, 11364 flow [2024-06-27 21:42:18,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 687 transitions, 11112 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:18,794 INFO L231 Difference]: Finished difference. Result has 416 places, 663 transitions, 9615 flow [2024-06-27 21:42:18,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9228, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9615, PETRI_PLACES=416, PETRI_TRANSITIONS=663} [2024-06-27 21:42:18,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-27 21:42:18,794 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 663 transitions, 9615 flow [2024-06-27 21:42:18,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:18,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:18,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:18,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:42:18,795 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)] === [2024-06-27 21:42:18,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash 56734652, now seen corresponding path program 2 times [2024-06-27 21:42:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:18,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255177157] [2024-06-27 21:42:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:19,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:19,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255177157] [2024-06-27 21:42:19,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255177157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:19,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:19,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633867573] [2024-06-27 21:42:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:19,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:19,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 663 transitions, 9615 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:19,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:19,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:19,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:21,470 INFO L124 PetriNetUnfolderBase]: 4051/6410 cut-off events. [2024-06-27 21:42:21,470 INFO L125 PetriNetUnfolderBase]: For 1231517/1231517 co-relation queries the response was YES. [2024-06-27 21:42:21,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62009 conditions, 6410 events. 4051/6410 cut-off events. For 1231517/1231517 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 39531 event pairs, 760 based on Foata normal form. 4/6413 useless extension candidates. Maximal degree in co-relation 61818. Up to 5726 conditions per place. [2024-06-27 21:42:21,563 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 580 selfloop transitions, 106 changer transitions 0/691 dead transitions. [2024-06-27 21:42:21,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 691 transitions, 11571 flow [2024-06-27 21:42:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:42:21,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:42:21,564 INFO L175 Difference]: Start difference. First operand has 416 places, 663 transitions, 9615 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:42:21,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 691 transitions, 11571 flow [2024-06-27 21:42:27,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 691 transitions, 11292 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 21:42:27,346 INFO L231 Difference]: Finished difference. Result has 420 places, 669 transitions, 9782 flow [2024-06-27 21:42:27,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9782, PETRI_PLACES=420, PETRI_TRANSITIONS=669} [2024-06-27 21:42:27,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 21:42:27,347 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 669 transitions, 9782 flow [2024-06-27 21:42:27,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:27,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:27,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:42:27,348 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)] === [2024-06-27 21:42:27,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash -719613914, now seen corresponding path program 3 times [2024-06-27 21:42:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:27,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289248116] [2024-06-27 21:42:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289248116] [2024-06-27 21:42:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289248116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:28,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:28,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847837052] [2024-06-27 21:42:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:28,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:28,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 669 transitions, 9782 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:28,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:28,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:28,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:30,170 INFO L124 PetriNetUnfolderBase]: 4054/6414 cut-off events. [2024-06-27 21:42:30,171 INFO L125 PetriNetUnfolderBase]: For 1240624/1240624 co-relation queries the response was YES. [2024-06-27 21:42:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61849 conditions, 6414 events. 4054/6414 cut-off events. For 1240624/1240624 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 39551 event pairs, 772 based on Foata normal form. 4/6417 useless extension candidates. Maximal degree in co-relation 61656. Up to 5809 conditions per place. [2024-06-27 21:42:30,264 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 116 changer transitions 0/692 dead transitions. [2024-06-27 21:42:30,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 692 transitions, 11344 flow [2024-06-27 21:42:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:42:30,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:42:30,265 INFO L175 Difference]: Start difference. First operand has 420 places, 669 transitions, 9782 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:42:30,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 692 transitions, 11344 flow [2024-06-27 21:42:36,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 692 transitions, 11084 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:36,390 INFO L231 Difference]: Finished difference. Result has 424 places, 672 transitions, 9879 flow [2024-06-27 21:42:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9879, PETRI_PLACES=424, PETRI_TRANSITIONS=672} [2024-06-27 21:42:36,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-27 21:42:36,391 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 672 transitions, 9879 flow [2024-06-27 21:42:36,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:36,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:36,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:42:36,392 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)] === [2024-06-27 21:42:36,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash -577510844, now seen corresponding path program 4 times [2024-06-27 21:42:36,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:36,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324706731] [2024-06-27 21:42:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:37,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:37,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324706731] [2024-06-27 21:42:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324706731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:37,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:37,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808963219] [2024-06-27 21:42:37,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:37,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:37,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:37,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 672 transitions, 9879 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:37,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:37,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:37,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:39,267 INFO L124 PetriNetUnfolderBase]: 4070/6441 cut-off events. [2024-06-27 21:42:39,267 INFO L125 PetriNetUnfolderBase]: For 1259440/1259440 co-relation queries the response was YES. [2024-06-27 21:42:39,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62290 conditions, 6441 events. 4070/6441 cut-off events. For 1259440/1259440 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39757 event pairs, 764 based on Foata normal form. 4/6444 useless extension candidates. Maximal degree in co-relation 62095. Up to 5699 conditions per place. [2024-06-27 21:42:39,358 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 132 changer transitions 0/693 dead transitions. [2024-06-27 21:42:39,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 693 transitions, 11431 flow [2024-06-27 21:42:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:42:39,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:42:39,359 INFO L175 Difference]: Start difference. First operand has 424 places, 672 transitions, 9879 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:42:39,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 693 transitions, 11431 flow [2024-06-27 21:42:46,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 693 transitions, 11118 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:46,093 INFO L231 Difference]: Finished difference. Result has 426 places, 675 transitions, 9954 flow [2024-06-27 21:42:46,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9954, PETRI_PLACES=426, PETRI_TRANSITIONS=675} [2024-06-27 21:42:46,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 21:42:46,094 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 675 transitions, 9954 flow [2024-06-27 21:42:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:46,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:46,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:46,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:42:46,095 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)] === [2024-06-27 21:42:46,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2080045490, now seen corresponding path program 5 times [2024-06-27 21:42:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559177735] [2024-06-27 21:42:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559177735] [2024-06-27 21:42:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559177735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:47,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464142615] [2024-06-27 21:42:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:47,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:47,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 675 transitions, 9954 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:47,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:47,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:47,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:48,911 INFO L124 PetriNetUnfolderBase]: 4128/6519 cut-off events. [2024-06-27 21:42:48,911 INFO L125 PetriNetUnfolderBase]: For 1332561/1332561 co-relation queries the response was YES. [2024-06-27 21:42:48,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64365 conditions, 6519 events. 4128/6519 cut-off events. For 1332561/1332561 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 40189 event pairs, 789 based on Foata normal form. 4/6522 useless extension candidates. Maximal degree in co-relation 64169. Up to 5705 conditions per place. [2024-06-27 21:42:49,004 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 564 selfloop transitions, 132 changer transitions 0/701 dead transitions. [2024-06-27 21:42:49,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 701 transitions, 11950 flow [2024-06-27 21:42:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:42:49,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 21:42:49,005 INFO L175 Difference]: Start difference. First operand has 426 places, 675 transitions, 9954 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:42:49,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 701 transitions, 11950 flow [2024-06-27 21:42:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 701 transitions, 11600 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 21:42:55,298 INFO L231 Difference]: Finished difference. Result has 430 places, 681 transitions, 10117 flow [2024-06-27 21:42:55,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9604, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10117, PETRI_PLACES=430, PETRI_TRANSITIONS=681} [2024-06-27 21:42:55,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 21:42:55,299 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 681 transitions, 10117 flow [2024-06-27 21:42:55,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:55,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:55,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:55,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:42:55,299 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)] === [2024-06-27 21:42:55,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2085555740, now seen corresponding path program 6 times [2024-06-27 21:42:55,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346257133] [2024-06-27 21:42:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:56,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:56,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346257133] [2024-06-27 21:42:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346257133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:56,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:56,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:42:56,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008479965] [2024-06-27 21:42:56,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:42:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:42:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:42:56,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:42:56,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 681 transitions, 10117 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:42:56,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:56,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:42:56,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:57,775 INFO L124 PetriNetUnfolderBase]: 4203/6637 cut-off events. [2024-06-27 21:42:57,775 INFO L125 PetriNetUnfolderBase]: For 1513610/1513610 co-relation queries the response was YES. [2024-06-27 21:42:57,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65647 conditions, 6637 events. 4203/6637 cut-off events. For 1513610/1513610 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 41051 event pairs, 779 based on Foata normal form. 24/6660 useless extension candidates. Maximal degree in co-relation 65449. Up to 5713 conditions per place. [2024-06-27 21:42:57,878 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 168 changer transitions 0/708 dead transitions. [2024-06-27 21:42:57,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 708 transitions, 12031 flow [2024-06-27 21:42:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:42:57,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:42:57,880 INFO L175 Difference]: Start difference. First operand has 430 places, 681 transitions, 10117 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:42:57,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 708 transitions, 12031 flow [2024-06-27 21:43:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 708 transitions, 11715 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-27 21:43:04,353 INFO L231 Difference]: Finished difference. Result has 434 places, 685 transitions, 10310 flow [2024-06-27 21:43:04,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9819, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10310, PETRI_PLACES=434, PETRI_TRANSITIONS=685} [2024-06-27 21:43:04,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 21:43:04,354 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 685 transitions, 10310 flow [2024-06-27 21:43:04,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:43:04,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:04,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:04,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:43:04,354 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)] === [2024-06-27 21:43:04,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2085770942, now seen corresponding path program 1 times [2024-06-27 21:43:04,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:04,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334092360] [2024-06-27 21:43:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:04,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:04,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334092360] [2024-06-27 21:43:04,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334092360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:04,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:04,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:04,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278179157] [2024-06-27 21:43:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:05,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:43:05,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 685 transitions, 10310 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:05,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:05,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:43:05,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:06,728 INFO L124 PetriNetUnfolderBase]: 4325/6827 cut-off events. [2024-06-27 21:43:06,728 INFO L125 PetriNetUnfolderBase]: For 1586100/1586100 co-relation queries the response was YES. [2024-06-27 21:43:06,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69794 conditions, 6827 events. 4325/6827 cut-off events. For 1586100/1586100 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 42301 event pairs, 805 based on Foata normal form. 16/6842 useless extension candidates. Maximal degree in co-relation 69594. Up to 5625 conditions per place. [2024-06-27 21:43:06,840 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 536 selfloop transitions, 175 changer transitions 0/716 dead transitions. [2024-06-27 21:43:06,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 716 transitions, 12576 flow [2024-06-27 21:43:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:43:06,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:43:06,841 INFO L175 Difference]: Start difference. First operand has 434 places, 685 transitions, 10310 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:43:06,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 716 transitions, 12576 flow [2024-06-27 21:43:13,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 716 transitions, 12147 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:13,433 INFO L231 Difference]: Finished difference. Result has 436 places, 689 transitions, 10452 flow [2024-06-27 21:43:13,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9881, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10452, PETRI_PLACES=436, PETRI_TRANSITIONS=689} [2024-06-27 21:43:13,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 21:43:13,434 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 689 transitions, 10452 flow [2024-06-27 21:43:13,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:13,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:13,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:13,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:43:13,434 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)] === [2024-06-27 21:43:13,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1159254034, now seen corresponding path program 7 times [2024-06-27 21:43:13,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:13,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380916025] [2024-06-27 21:43:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:13,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:14,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:14,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380916025] [2024-06-27 21:43:14,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380916025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:14,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:14,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:14,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014075201] [2024-06-27 21:43:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:14,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:14,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:43:14,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 689 transitions, 10452 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:43:14,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:14,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:43:14,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:16,172 INFO L124 PetriNetUnfolderBase]: 4413/6964 cut-off events. [2024-06-27 21:43:16,173 INFO L125 PetriNetUnfolderBase]: For 1683355/1683357 co-relation queries the response was YES. [2024-06-27 21:43:16,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71001 conditions, 6964 events. 4413/6964 cut-off events. For 1683355/1683357 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43318 event pairs, 862 based on Foata normal form. 24/6987 useless extension candidates. Maximal degree in co-relation 70800. Up to 5663 conditions per place. [2024-06-27 21:43:16,284 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 274 changer transitions 0/713 dead transitions. [2024-06-27 21:43:16,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 713 transitions, 12344 flow [2024-06-27 21:43:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:43:16,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:43:16,285 INFO L175 Difference]: Start difference. First operand has 436 places, 689 transitions, 10452 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:43:16,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 713 transitions, 12344 flow [2024-06-27 21:43:22,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 713 transitions, 12024 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 21:43:22,974 INFO L231 Difference]: Finished difference. Result has 440 places, 692 transitions, 10826 flow [2024-06-27 21:43:22,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10132, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10826, PETRI_PLACES=440, PETRI_TRANSITIONS=692} [2024-06-27 21:43:22,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 21:43:22,975 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 692 transitions, 10826 flow [2024-06-27 21:43:22,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:43:22,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:22,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:22,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:43:22,975 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)] === [2024-06-27 21:43:22,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1175411086, now seen corresponding path program 2 times [2024-06-27 21:43:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:22,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140214793] [2024-06-27 21:43:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:22,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140214793] [2024-06-27 21:43:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140214793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:23,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:23,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905350783] [2024-06-27 21:43:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:23,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:43:23,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 692 transitions, 10826 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:23,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:23,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:43:23,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:25,505 INFO L124 PetriNetUnfolderBase]: 4535/7159 cut-off events. [2024-06-27 21:43:25,505 INFO L125 PetriNetUnfolderBase]: For 1750524/1750526 co-relation queries the response was YES. [2024-06-27 21:43:25,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75335 conditions, 7159 events. 4535/7159 cut-off events. For 1750524/1750526 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44691 event pairs, 878 based on Foata normal form. 16/7174 useless extension candidates. Maximal degree in co-relation 75132. Up to 5599 conditions per place. [2024-06-27 21:43:25,619 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 437 selfloop transitions, 279 changer transitions 0/721 dead transitions. [2024-06-27 21:43:25,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 721 transitions, 13114 flow [2024-06-27 21:43:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:43:25,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 21:43:25,620 INFO L175 Difference]: Start difference. First operand has 440 places, 692 transitions, 10826 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:43:25,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 721 transitions, 13114 flow [2024-06-27 21:43:32,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 721 transitions, 12466 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:32,966 INFO L231 Difference]: Finished difference. Result has 442 places, 696 transitions, 10974 flow [2024-06-27 21:43:32,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10178, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10974, PETRI_PLACES=442, PETRI_TRANSITIONS=696} [2024-06-27 21:43:32,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-27 21:43:32,966 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 696 transitions, 10974 flow [2024-06-27 21:43:32,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:32,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:32,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:32,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:43:32,967 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)] === [2024-06-27 21:43:32,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1425166516, now seen corresponding path program 3 times [2024-06-27 21:43:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807687621] [2024-06-27 21:43:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807687621] [2024-06-27 21:43:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807687621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:33,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370683422] [2024-06-27 21:43:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:33,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:43:33,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 696 transitions, 10974 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:33,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:33,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:43:33,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:35,676 INFO L124 PetriNetUnfolderBase]: 4709/7423 cut-off events. [2024-06-27 21:43:35,676 INFO L125 PetriNetUnfolderBase]: For 1952433/1952435 co-relation queries the response was YES. [2024-06-27 21:43:35,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80577 conditions, 7423 events. 4709/7423 cut-off events. For 1952433/1952435 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46398 event pairs, 916 based on Foata normal form. 16/7438 useless extension candidates. Maximal degree in co-relation 80373. Up to 5085 conditions per place. [2024-06-27 21:43:35,796 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 420 selfloop transitions, 301 changer transitions 0/726 dead transitions. [2024-06-27 21:43:35,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 726 transitions, 13306 flow [2024-06-27 21:43:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:43:35,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:43:35,797 INFO L175 Difference]: Start difference. First operand has 442 places, 696 transitions, 10974 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:43:35,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 726 transitions, 13306 flow [2024-06-27 21:43:43,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 726 transitions, 12656 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 21:43:43,116 INFO L231 Difference]: Finished difference. Result has 445 places, 700 transitions, 11171 flow [2024-06-27 21:43:43,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10328, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11171, PETRI_PLACES=445, PETRI_TRANSITIONS=700} [2024-06-27 21:43:43,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-27 21:43:43,117 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 700 transitions, 11171 flow [2024-06-27 21:43:43,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:43,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:43,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:43,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:43:43,118 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)] === [2024-06-27 21:43:43,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1610714320, now seen corresponding path program 8 times [2024-06-27 21:43:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:43,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103791637] [2024-06-27 21:43:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:43,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:44,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103791637] [2024-06-27 21:43:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103791637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:44,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:44,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934145693] [2024-06-27 21:43:44,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:44,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:43:44,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 700 transitions, 11171 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:43:44,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:44,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:43:44,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:46,059 INFO L124 PetriNetUnfolderBase]: 4797/7563 cut-off events. [2024-06-27 21:43:46,059 INFO L125 PetriNetUnfolderBase]: For 2061773/2061775 co-relation queries the response was YES. [2024-06-27 21:43:46,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82331 conditions, 7563 events. 4797/7563 cut-off events. For 2061773/2061775 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 47573 event pairs, 966 based on Foata normal form. 24/7586 useless extension candidates. Maximal degree in co-relation 82126. Up to 6255 conditions per place. [2024-06-27 21:43:46,186 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 235 changer transitions 0/725 dead transitions. [2024-06-27 21:43:46,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 725 transitions, 13369 flow [2024-06-27 21:43:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:43:46,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:43:46,188 INFO L175 Difference]: Start difference. First operand has 445 places, 700 transitions, 11171 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:43:46,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 725 transitions, 13369 flow [2024-06-27 21:43:54,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 725 transitions, 12906 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 21:43:54,216 INFO L231 Difference]: Finished difference. Result has 449 places, 703 transitions, 11336 flow [2024-06-27 21:43:54,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10708, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11336, PETRI_PLACES=449, PETRI_TRANSITIONS=703} [2024-06-27 21:43:54,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-27 21:43:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 703 transitions, 11336 flow [2024-06-27 21:43:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:43:54,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:54,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:54,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:43:54,216 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)] === [2024-06-27 21:43:54,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1610708368, now seen corresponding path program 4 times [2024-06-27 21:43:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969454722] [2024-06-27 21:43:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:55,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:55,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969454722] [2024-06-27 21:43:55,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969454722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:55,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:55,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:43:55,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095812595] [2024-06-27 21:43:55,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:43:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:43:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:43:55,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:43:55,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 703 transitions, 11336 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:43:55,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:55,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:43:55,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:57,250 INFO L124 PetriNetUnfolderBase]: 4889/7707 cut-off events. [2024-06-27 21:43:57,250 INFO L125 PetriNetUnfolderBase]: For 2049218/2049220 co-relation queries the response was YES. [2024-06-27 21:43:57,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83834 conditions, 7707 events. 4889/7707 cut-off events. For 2049218/2049220 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48606 event pairs, 978 based on Foata normal form. 20/7726 useless extension candidates. Maximal degree in co-relation 83627. Up to 6299 conditions per place. [2024-06-27 21:43:57,381 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 487 selfloop transitions, 241 changer transitions 0/733 dead transitions. [2024-06-27 21:43:57,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 733 transitions, 13564 flow [2024-06-27 21:43:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 21:43:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-27 21:43:57,382 INFO L175 Difference]: Start difference. First operand has 449 places, 703 transitions, 11336 flow. Second operand 10 states and 181 transitions. [2024-06-27 21:43:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 733 transitions, 13564 flow [2024-06-27 21:44:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 733 transitions, 12978 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 21:44:04,318 INFO L231 Difference]: Finished difference. Result has 452 places, 709 transitions, 11396 flow [2024-06-27 21:44:04,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10758, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11396, PETRI_PLACES=452, PETRI_TRANSITIONS=709} [2024-06-27 21:44:04,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 21:44:04,319 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 709 transitions, 11396 flow [2024-06-27 21:44:04,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:04,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:04,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:04,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:44:04,319 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)] === [2024-06-27 21:44:04,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2133483720, now seen corresponding path program 5 times [2024-06-27 21:44:04,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:04,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471003383] [2024-06-27 21:44:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:04,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471003383] [2024-06-27 21:44:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471003383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:04,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608743210] [2024-06-27 21:44:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:04,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:04,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:44:05,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 709 transitions, 11396 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:05,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:05,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:44:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:07,049 INFO L124 PetriNetUnfolderBase]: 4893/7723 cut-off events. [2024-06-27 21:44:07,050 INFO L125 PetriNetUnfolderBase]: For 1965113/1965115 co-relation queries the response was YES. [2024-06-27 21:44:07,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82212 conditions, 7723 events. 4893/7723 cut-off events. For 1965113/1965115 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48717 event pairs, 964 based on Foata normal form. 16/7738 useless extension candidates. Maximal degree in co-relation 82004. Up to 6001 conditions per place. [2024-06-27 21:44:07,183 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 246 changer transitions 0/739 dead transitions. [2024-06-27 21:44:07,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 739 transitions, 13953 flow [2024-06-27 21:44:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:44:07,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:44:07,184 INFO L175 Difference]: Start difference. First operand has 452 places, 709 transitions, 11396 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:44:07,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 739 transitions, 13953 flow [2024-06-27 21:44:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 739 transitions, 13449 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 21:44:13,476 INFO L231 Difference]: Finished difference. Result has 456 places, 712 transitions, 11562 flow [2024-06-27 21:44:13,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10892, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11562, PETRI_PLACES=456, PETRI_TRANSITIONS=712} [2024-06-27 21:44:13,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 21:44:13,476 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 712 transitions, 11562 flow [2024-06-27 21:44:13,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:13,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:13,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:44:13,477 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)] === [2024-06-27 21:44:13,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2127761988, now seen corresponding path program 9 times [2024-06-27 21:44:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661698280] [2024-06-27 21:44:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:14,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661698280] [2024-06-27 21:44:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661698280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:14,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582154779] [2024-06-27 21:44:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:14,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:14,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:14,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:44:14,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 712 transitions, 11562 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:14,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:14,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:44:14,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:16,383 INFO L124 PetriNetUnfolderBase]: 4883/7705 cut-off events. [2024-06-27 21:44:16,383 INFO L125 PetriNetUnfolderBase]: For 1838863/1838865 co-relation queries the response was YES. [2024-06-27 21:44:16,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81535 conditions, 7705 events. 4883/7705 cut-off events. For 1838863/1838865 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48663 event pairs, 1005 based on Foata normal form. 4/7708 useless extension candidates. Maximal degree in co-relation 81325. Up to 6766 conditions per place. [2024-06-27 21:44:16,516 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 173 changer transitions 0/730 dead transitions. [2024-06-27 21:44:16,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 730 transitions, 13216 flow [2024-06-27 21:44:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:44:16,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:44:16,517 INFO L175 Difference]: Start difference. First operand has 456 places, 712 transitions, 11562 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:44:16,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 730 transitions, 13216 flow [2024-06-27 21:44:23,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 730 transitions, 12276 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-27 21:44:23,213 INFO L231 Difference]: Finished difference. Result has 456 places, 715 transitions, 11136 flow [2024-06-27 21:44:23,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11136, PETRI_PLACES=456, PETRI_TRANSITIONS=715} [2024-06-27 21:44:23,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 21:44:23,213 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 715 transitions, 11136 flow [2024-06-27 21:44:23,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:23,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:23,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:23,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:44:23,214 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)] === [2024-06-27 21:44:23,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2127758268, now seen corresponding path program 10 times [2024-06-27 21:44:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:23,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185168241] [2024-06-27 21:44:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:24,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185168241] [2024-06-27 21:44:24,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185168241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:24,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:24,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:24,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081793879] [2024-06-27 21:44:24,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:24,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:24,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:24,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:44:24,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 715 transitions, 11136 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:24,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:24,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:44:24,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:26,108 INFO L124 PetriNetUnfolderBase]: 4889/7718 cut-off events. [2024-06-27 21:44:26,108 INFO L125 PetriNetUnfolderBase]: For 1822726/1822728 co-relation queries the response was YES. [2024-06-27 21:44:26,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78971 conditions, 7718 events. 4889/7718 cut-off events. For 1822726/1822728 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 48791 event pairs, 1007 based on Foata normal form. 4/7721 useless extension candidates. Maximal degree in co-relation 78762. Up to 6679 conditions per place. [2024-06-27 21:44:26,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 559 selfloop transitions, 177 changer transitions 0/741 dead transitions. [2024-06-27 21:44:26,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 741 transitions, 13252 flow [2024-06-27 21:44:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:44:26,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 21:44:26,240 INFO L175 Difference]: Start difference. First operand has 456 places, 715 transitions, 11136 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:44:26,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 741 transitions, 13252 flow [2024-06-27 21:44:33,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 741 transitions, 12810 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 21:44:33,200 INFO L231 Difference]: Finished difference. Result has 460 places, 723 transitions, 11373 flow [2024-06-27 21:44:33,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10694, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11373, PETRI_PLACES=460, PETRI_TRANSITIONS=723} [2024-06-27 21:44:33,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-27 21:44:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 723 transitions, 11373 flow [2024-06-27 21:44:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:33,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:33,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:44:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:44:33,202 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)] === [2024-06-27 21:44:33,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2127912090, now seen corresponding path program 6 times [2024-06-27 21:44:33,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513486743] [2024-06-27 21:44:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:34,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:34,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513486743] [2024-06-27 21:44:34,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513486743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:34,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:34,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:44:34,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284999057] [2024-06-27 21:44:34,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:34,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:44:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:34,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:44:34,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:44:34,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:44:34,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 723 transitions, 11373 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:34,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:34,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:44:34,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:36,102 INFO L124 PetriNetUnfolderBase]: 4843/7639 cut-off events. [2024-06-27 21:44:36,102 INFO L125 PetriNetUnfolderBase]: For 1815839/1815841 co-relation queries the response was YES. [2024-06-27 21:44:36,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75827 conditions, 7639 events. 4843/7639 cut-off events. For 1815839/1815841 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 48170 event pairs, 970 based on Foata normal form. 20/7658 useless extension candidates. Maximal degree in co-relation 75616. Up to 6325 conditions per place. [2024-06-27 21:44:36,231 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 492 selfloop transitions, 250 changer transitions 0/747 dead transitions. [2024-06-27 21:44:36,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 747 transitions, 13497 flow [2024-06-27 21:44:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 21:44:36,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:44:36,232 INFO L175 Difference]: Start difference. First operand has 460 places, 723 transitions, 11373 flow. Second operand 10 states and 180 transitions. [2024-06-27 21:44:36,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 747 transitions, 13497 flow [2024-06-27 21:44:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 747 transitions, 13055 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-27 21:44:43,420 INFO L231 Difference]: Finished difference. Result has 465 places, 723 transitions, 11441 flow [2024-06-27 21:44:43,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10931, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11441, PETRI_PLACES=465, PETRI_TRANSITIONS=723} [2024-06-27 21:44:43,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-27 21:44:43,421 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 723 transitions, 11441 flow [2024-06-27 21:44:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 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) [2024-06-27 21:44:43,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:43,422 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] [2024-06-27 21:44:43,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:44:43,422 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)] === [2024-06-27 21:44:43,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash 176321850, now seen corresponding path program 1 times [2024-06-27 21:44:43,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:43,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320295637] [2024-06-27 21:44:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:43,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:44,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320295637] [2024-06-27 21:44:44,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320295637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:44,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771042522] [2024-06-27 21:44:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:44,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:44:44,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 723 transitions, 11441 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:44,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:44,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:44:44,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:46,069 INFO L124 PetriNetUnfolderBase]: 4917/7763 cut-off events. [2024-06-27 21:44:46,070 INFO L125 PetriNetUnfolderBase]: For 1658790/1658790 co-relation queries the response was YES. [2024-06-27 21:44:46,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76556 conditions, 7763 events. 4917/7763 cut-off events. For 1658790/1658790 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 49080 event pairs, 916 based on Foata normal form. 2/7765 useless extension candidates. Maximal degree in co-relation 76343. Up to 7341 conditions per place. [2024-06-27 21:44:46,199 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 711 selfloop transitions, 63 changer transitions 0/779 dead transitions. [2024-06-27 21:44:46,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 779 transitions, 13432 flow [2024-06-27 21:44:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:44:46,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:44:46,200 INFO L175 Difference]: Start difference. First operand has 465 places, 723 transitions, 11441 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:44:46,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 779 transitions, 13432 flow [2024-06-27 21:44:54,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 779 transitions, 12874 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 21:44:54,141 INFO L231 Difference]: Finished difference. Result has 468 places, 749 transitions, 11419 flow [2024-06-27 21:44:54,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10883, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11419, PETRI_PLACES=468, PETRI_TRANSITIONS=749} [2024-06-27 21:44:54,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-27 21:44:54,142 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 749 transitions, 11419 flow [2024-06-27 21:44:54,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:54,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:54,142 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] [2024-06-27 21:44:54,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 21:44:54,142 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)] === [2024-06-27 21:44:54,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:54,142 INFO L85 PathProgramCache]: Analyzing trace with hash -756033626, now seen corresponding path program 2 times [2024-06-27 21:44:54,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722209290] [2024-06-27 21:44:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:54,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722209290] [2024-06-27 21:44:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722209290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:54,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139037873] [2024-06-27 21:44:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:54,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:44:54,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 749 transitions, 11419 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:54,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:54,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:44:54,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:56,752 INFO L124 PetriNetUnfolderBase]: 4945/7799 cut-off events. [2024-06-27 21:44:56,752 INFO L125 PetriNetUnfolderBase]: For 1693788/1693788 co-relation queries the response was YES. [2024-06-27 21:44:56,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77410 conditions, 7799 events. 4945/7799 cut-off events. For 1693788/1693788 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49298 event pairs, 919 based on Foata normal form. 2/7801 useless extension candidates. Maximal degree in co-relation 77194. Up to 7354 conditions per place. [2024-06-27 21:44:56,884 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 714 selfloop transitions, 71 changer transitions 0/790 dead transitions. [2024-06-27 21:44:56,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 790 transitions, 13657 flow [2024-06-27 21:44:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:44:56,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:44:56,885 INFO L175 Difference]: Start difference. First operand has 468 places, 749 transitions, 11419 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:44:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 790 transitions, 13657 flow [2024-06-27 21:45:03,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 790 transitions, 13516 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 21:45:03,700 INFO L231 Difference]: Finished difference. Result has 475 places, 761 transitions, 11754 flow [2024-06-27 21:45:03,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11278, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11754, PETRI_PLACES=475, PETRI_TRANSITIONS=761} [2024-06-27 21:45:03,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-27 21:45:03,701 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 761 transitions, 11754 flow [2024-06-27 21:45:03,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:03,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:03,701 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] [2024-06-27 21:45:03,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 21:45:03,701 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)] === [2024-06-27 21:45:03,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash 246840450, now seen corresponding path program 1 times [2024-06-27 21:45:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:03,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789906872] [2024-06-27 21:45:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:03,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:04,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789906872] [2024-06-27 21:45:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789906872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:04,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:04,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:45:04,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332153195] [2024-06-27 21:45:04,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:45:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:45:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:45:04,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:45:04,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 761 transitions, 11754 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:04,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:04,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:45:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:06,207 INFO L124 PetriNetUnfolderBase]: 4950/7795 cut-off events. [2024-06-27 21:45:06,207 INFO L125 PetriNetUnfolderBase]: For 1712535/1712535 co-relation queries the response was YES. [2024-06-27 21:45:06,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78194 conditions, 7795 events. 4950/7795 cut-off events. For 1712535/1712535 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49075 event pairs, 892 based on Foata normal form. 1/7793 useless extension candidates. Maximal degree in co-relation 77975. Up to 7294 conditions per place. [2024-06-27 21:45:06,346 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 664 selfloop transitions, 108 changer transitions 0/777 dead transitions. [2024-06-27 21:45:06,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 777 transitions, 13438 flow [2024-06-27 21:45:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:45:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:45:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:45:06,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:45:06,347 INFO L175 Difference]: Start difference. First operand has 475 places, 761 transitions, 11754 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:45:06,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 777 transitions, 13438 flow [2024-06-27 21:45:15,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 777 transitions, 13261 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 21:45:15,183 INFO L231 Difference]: Finished difference. Result has 478 places, 764 transitions, 11907 flow [2024-06-27 21:45:15,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11907, PETRI_PLACES=478, PETRI_TRANSITIONS=764} [2024-06-27 21:45:15,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-27 21:45:15,184 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 764 transitions, 11907 flow [2024-06-27 21:45:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:15,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:15,184 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] [2024-06-27 21:45:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 21:45:15,184 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)] === [2024-06-27 21:45:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1114505902, now seen corresponding path program 2 times [2024-06-27 21:45:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70335373] [2024-06-27 21:45:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:15,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70335373] [2024-06-27 21:45:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70335373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:15,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:45:15,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285494184] [2024-06-27 21:45:15,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:15,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:45:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:15,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:45:15,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:45:15,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:45:15,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 764 transitions, 11907 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:15,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:15,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:45:15,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:17,730 INFO L124 PetriNetUnfolderBase]: 4968/7822 cut-off events. [2024-06-27 21:45:17,730 INFO L125 PetriNetUnfolderBase]: For 1744511/1744511 co-relation queries the response was YES. [2024-06-27 21:45:17,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78870 conditions, 7822 events. 4968/7822 cut-off events. For 1744511/1744511 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 49304 event pairs, 892 based on Foata normal form. 1/7820 useless extension candidates. Maximal degree in co-relation 78649. Up to 7201 conditions per place. [2024-06-27 21:45:17,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 172 changer transitions 0/788 dead transitions. [2024-06-27 21:45:17,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 788 transitions, 14008 flow [2024-06-27 21:45:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:45:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:45:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:45:17,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 21:45:17,870 INFO L175 Difference]: Start difference. First operand has 478 places, 764 transitions, 11907 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:45:17,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 788 transitions, 14008 flow [2024-06-27 21:45:25,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 788 transitions, 13751 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:45:25,674 INFO L231 Difference]: Finished difference. Result has 482 places, 773 transitions, 12265 flow [2024-06-27 21:45:25,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11650, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12265, PETRI_PLACES=482, PETRI_TRANSITIONS=773} [2024-06-27 21:45:25,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 21:45:25,674 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 773 transitions, 12265 flow [2024-06-27 21:45:25,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:25,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:25,674 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] [2024-06-27 21:45:25,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 21:45:25,675 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)] === [2024-06-27 21:45:25,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2115181376, now seen corresponding path program 3 times [2024-06-27 21:45:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:25,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439431010] [2024-06-27 21:45:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:26,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:26,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439431010] [2024-06-27 21:45:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439431010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:26,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:26,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:26,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793475773] [2024-06-27 21:45:26,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:26,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:26,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:26,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:45:26,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 773 transitions, 12265 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:26,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:26,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:45:26,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:28,370 INFO L124 PetriNetUnfolderBase]: 4998/7875 cut-off events. [2024-06-27 21:45:28,370 INFO L125 PetriNetUnfolderBase]: For 1779688/1779688 co-relation queries the response was YES. [2024-06-27 21:45:28,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79717 conditions, 7875 events. 4998/7875 cut-off events. For 1779688/1779688 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49747 event pairs, 890 based on Foata normal form. 2/7877 useless extension candidates. Maximal degree in co-relation 79494. Up to 7406 conditions per place. [2024-06-27 21:45:28,510 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 729 selfloop transitions, 84 changer transitions 0/818 dead transitions. [2024-06-27 21:45:28,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 818 transitions, 14591 flow [2024-06-27 21:45:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:45:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:45:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 21:45:28,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-27 21:45:28,511 INFO L175 Difference]: Start difference. First operand has 482 places, 773 transitions, 12265 flow. Second operand 11 states and 189 transitions. [2024-06-27 21:45:28,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 818 transitions, 14591 flow [2024-06-27 21:45:38,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 818 transitions, 14323 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:45:38,103 INFO L231 Difference]: Finished difference. Result has 490 places, 788 transitions, 12555 flow [2024-06-27 21:45:38,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12009, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12555, PETRI_PLACES=490, PETRI_TRANSITIONS=788} [2024-06-27 21:45:38,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-27 21:45:38,103 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 788 transitions, 12555 flow [2024-06-27 21:45:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:38,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:38,103 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] [2024-06-27 21:45:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 21:45:38,103 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)] === [2024-06-27 21:45:38,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -386054180, now seen corresponding path program 3 times [2024-06-27 21:45:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:38,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274307122] [2024-06-27 21:45:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:38,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:38,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274307122] [2024-06-27 21:45:38,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274307122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:38,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:38,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:45:38,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287748279] [2024-06-27 21:45:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:38,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:45:38,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:38,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:45:38,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:45:38,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:45:38,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 788 transitions, 12555 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:38,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:38,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:45:38,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:40,842 INFO L124 PetriNetUnfolderBase]: 4995/7860 cut-off events. [2024-06-27 21:45:40,842 INFO L125 PetriNetUnfolderBase]: For 1763486/1763486 co-relation queries the response was YES. [2024-06-27 21:45:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80147 conditions, 7860 events. 4995/7860 cut-off events. For 1763486/1763486 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49549 event pairs, 892 based on Foata normal form. 1/7858 useless extension candidates. Maximal degree in co-relation 79921. Up to 7224 conditions per place. [2024-06-27 21:45:40,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 630 selfloop transitions, 167 changer transitions 0/802 dead transitions. [2024-06-27 21:45:40,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 802 transitions, 14204 flow [2024-06-27 21:45:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:45:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:45:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:45:40,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:45:40,979 INFO L175 Difference]: Start difference. First operand has 490 places, 788 transitions, 12555 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:45:40,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 802 transitions, 14204 flow [2024-06-27 21:45:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 802 transitions, 13913 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-27 21:45:51,345 INFO L231 Difference]: Finished difference. Result has 491 places, 788 transitions, 12618 flow [2024-06-27 21:45:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12618, PETRI_PLACES=491, PETRI_TRANSITIONS=788} [2024-06-27 21:45:51,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 21:45:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 788 transitions, 12618 flow [2024-06-27 21:45:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:51,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:51,345 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] [2024-06-27 21:45:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 21:45:51,345 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)] === [2024-06-27 21:45:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -986413912, now seen corresponding path program 4 times [2024-06-27 21:45:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146796355] [2024-06-27 21:45:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146796355] [2024-06-27 21:45:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146796355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:51,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:51,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402912056] [2024-06-27 21:45:51,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:51,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:51,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:51,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:51,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:51,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:45:51,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 788 transitions, 12618 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:51,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:51,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:45:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:54,808 INFO L124 PetriNetUnfolderBase]: 5126/8084 cut-off events. [2024-06-27 21:45:54,808 INFO L125 PetriNetUnfolderBase]: For 1800124/1800126 co-relation queries the response was YES. [2024-06-27 21:45:54,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81386 conditions, 8084 events. 5126/8084 cut-off events. For 1800124/1800126 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51458 event pairs, 907 based on Foata normal form. 2/8085 useless extension candidates. Maximal degree in co-relation 81159. Up to 7148 conditions per place. [2024-06-27 21:45:54,937 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 685 selfloop transitions, 168 changer transitions 0/858 dead transitions. [2024-06-27 21:45:54,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 858 transitions, 14824 flow [2024-06-27 21:45:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:45:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:45:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 21:45:54,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:45:54,938 INFO L175 Difference]: Start difference. First operand has 491 places, 788 transitions, 12618 flow. Second operand 10 states and 186 transitions. [2024-06-27 21:45:54,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 858 transitions, 14824 flow [2024-06-27 21:46:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 858 transitions, 14573 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:46:03,632 INFO L231 Difference]: Finished difference. Result has 498 places, 820 transitions, 13129 flow [2024-06-27 21:46:03,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12367, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13129, PETRI_PLACES=498, PETRI_TRANSITIONS=820} [2024-06-27 21:46:03,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-27 21:46:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 820 transitions, 13129 flow [2024-06-27 21:46:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:03,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:03,634 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] [2024-06-27 21:46:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 21:46:03,634 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)] === [2024-06-27 21:46:03,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash 365745282, now seen corresponding path program 4 times [2024-06-27 21:46:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:03,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946743158] [2024-06-27 21:46:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:03,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:04,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946743158] [2024-06-27 21:46:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946743158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:04,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:04,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:46:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129427839] [2024-06-27 21:46:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:46:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:46:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:46:04,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:46:04,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 820 transitions, 13129 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:04,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:04,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:46:04,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:07,031 INFO L124 PetriNetUnfolderBase]: 5131/8077 cut-off events. [2024-06-27 21:46:07,031 INFO L125 PetriNetUnfolderBase]: For 1796101/1796101 co-relation queries the response was YES. [2024-06-27 21:46:07,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83009 conditions, 8077 events. 5131/8077 cut-off events. For 1796101/1796101 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51243 event pairs, 941 based on Foata normal form. 1/8075 useless extension candidates. Maximal degree in co-relation 82779. Up to 7556 conditions per place. [2024-06-27 21:46:07,186 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 731 selfloop transitions, 104 changer transitions 0/840 dead transitions. [2024-06-27 21:46:07,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 840 transitions, 14971 flow [2024-06-27 21:46:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:46:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:46:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:46:07,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:46:07,187 INFO L175 Difference]: Start difference. First operand has 498 places, 820 transitions, 13129 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:46:07,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 840 transitions, 14971 flow [2024-06-27 21:46:16,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 840 transitions, 14651 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 21:46:16,830 INFO L231 Difference]: Finished difference. Result has 502 places, 823 transitions, 13126 flow [2024-06-27 21:46:16,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12809, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13126, PETRI_PLACES=502, PETRI_TRANSITIONS=823} [2024-06-27 21:46:16,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 21:46:16,830 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 823 transitions, 13126 flow [2024-06-27 21:46:16,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:16,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:16,831 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] [2024-06-27 21:46:16,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 21:46:16,831 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)] === [2024-06-27 21:46:16,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash -787112122, now seen corresponding path program 5 times [2024-06-27 21:46:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:16,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737448141] [2024-06-27 21:46:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737448141] [2024-06-27 21:46:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737448141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:17,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:17,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123162574] [2024-06-27 21:46:17,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:17,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:17,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:46:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 823 transitions, 13126 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:46:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:20,355 INFO L124 PetriNetUnfolderBase]: 5141/8109 cut-off events. [2024-06-27 21:46:20,356 INFO L125 PetriNetUnfolderBase]: For 1833347/1833349 co-relation queries the response was YES. [2024-06-27 21:46:20,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83030 conditions, 8109 events. 5141/8109 cut-off events. For 1833347/1833349 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 51650 event pairs, 899 based on Foata normal form. 2/8110 useless extension candidates. Maximal degree in co-relation 82799. Up to 7169 conditions per place. [2024-06-27 21:46:20,495 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 683 selfloop transitions, 181 changer transitions 0/869 dead transitions. [2024-06-27 21:46:20,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 869 transitions, 15216 flow [2024-06-27 21:46:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:46:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:46:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 21:46:20,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-27 21:46:20,497 INFO L175 Difference]: Start difference. First operand has 502 places, 823 transitions, 13126 flow. Second operand 10 states and 184 transitions. [2024-06-27 21:46:20,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 869 transitions, 15216 flow [2024-06-27 21:46:29,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 869 transitions, 14938 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 21:46:29,409 INFO L231 Difference]: Finished difference. Result has 508 places, 833 transitions, 13443 flow [2024-06-27 21:46:29,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12848, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13443, PETRI_PLACES=508, PETRI_TRANSITIONS=833} [2024-06-27 21:46:29,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-27 21:46:29,410 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 833 transitions, 13443 flow [2024-06-27 21:46:29,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:29,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:29,410 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] [2024-06-27 21:46:29,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 21:46:29,410 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)] === [2024-06-27 21:46:29,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1139985138, now seen corresponding path program 6 times [2024-06-27 21:46:29,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:29,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709310409] [2024-06-27 21:46:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:29,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:29,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709310409] [2024-06-27 21:46:29,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709310409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:29,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:29,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:29,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757775604] [2024-06-27 21:46:29,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:29,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:29,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:29,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:30,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:46:30,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 833 transitions, 13443 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:30,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:30,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:46:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:33,043 INFO L124 PetriNetUnfolderBase]: 5167/8135 cut-off events. [2024-06-27 21:46:33,043 INFO L125 PetriNetUnfolderBase]: For 1893052/1893054 co-relation queries the response was YES. [2024-06-27 21:46:33,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85817 conditions, 8135 events. 5167/8135 cut-off events. For 1893052/1893054 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 51776 event pairs, 906 based on Foata normal form. 2/8136 useless extension candidates. Maximal degree in co-relation 85583. Up to 7166 conditions per place. [2024-06-27 21:46:33,191 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 674 selfloop transitions, 195 changer transitions 0/874 dead transitions. [2024-06-27 21:46:33,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 874 transitions, 15927 flow [2024-06-27 21:46:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:46:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:46:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 21:46:33,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-27 21:46:33,192 INFO L175 Difference]: Start difference. First operand has 508 places, 833 transitions, 13443 flow. Second operand 10 states and 184 transitions. [2024-06-27 21:46:33,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 874 transitions, 15927 flow [2024-06-27 21:46:40,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 874 transitions, 15524 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 21:46:40,814 INFO L231 Difference]: Finished difference. Result has 513 places, 839 transitions, 13714 flow [2024-06-27 21:46:40,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13040, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13714, PETRI_PLACES=513, PETRI_TRANSITIONS=839} [2024-06-27 21:46:40,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-27 21:46:40,814 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 839 transitions, 13714 flow [2024-06-27 21:46:40,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:40,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:40,814 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] [2024-06-27 21:46:40,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 21:46:40,814 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)] === [2024-06-27 21:46:40,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1349642478, now seen corresponding path program 7 times [2024-06-27 21:46:40,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:40,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810665883] [2024-06-27 21:46:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810665883] [2024-06-27 21:46:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810665883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:41,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:41,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939415198] [2024-06-27 21:46:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:41,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:41,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:46:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 839 transitions, 13714 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:41,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:41,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:46:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:44,101 INFO L124 PetriNetUnfolderBase]: 5190/8176 cut-off events. [2024-06-27 21:46:44,102 INFO L125 PetriNetUnfolderBase]: For 1937037/1937039 co-relation queries the response was YES. [2024-06-27 21:46:44,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87084 conditions, 8176 events. 5190/8176 cut-off events. For 1937037/1937039 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52115 event pairs, 908 based on Foata normal form. 2/8177 useless extension candidates. Maximal degree in co-relation 86849. Up to 7211 conditions per place. [2024-06-27 21:46:44,241 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 693 selfloop transitions, 184 changer transitions 0/882 dead transitions. [2024-06-27 21:46:44,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 882 transitions, 16254 flow [2024-06-27 21:46:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:46:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:46:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 21:46:44,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:46:44,243 INFO L175 Difference]: Start difference. First operand has 513 places, 839 transitions, 13714 flow. Second operand 10 states and 186 transitions. [2024-06-27 21:46:44,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 882 transitions, 16254 flow [2024-06-27 21:46:54,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 882 transitions, 15865 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-27 21:46:54,083 INFO L231 Difference]: Finished difference. Result has 518 places, 848 transitions, 14068 flow [2024-06-27 21:46:54,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13341, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14068, PETRI_PLACES=518, PETRI_TRANSITIONS=848} [2024-06-27 21:46:54,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-27 21:46:54,083 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 848 transitions, 14068 flow [2024-06-27 21:46:54,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:54,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:46:54,083 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] [2024-06-27 21:46:54,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 21:46:54,084 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)] === [2024-06-27 21:46:54,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:46:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1024693968, now seen corresponding path program 8 times [2024-06-27 21:46:54,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:46:54,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151865443] [2024-06-27 21:46:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:46:54,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:46:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:46:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:46:54,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:46:54,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151865443] [2024-06-27 21:46:54,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151865443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:46:54,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:46:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:46:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886408147] [2024-06-27 21:46:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:46:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:46:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:46:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:46:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:46:54,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:46:54,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 848 transitions, 14068 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:46:54,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:46:54,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:46:54,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:46:57,672 INFO L124 PetriNetUnfolderBase]: 5249/8255 cut-off events. [2024-06-27 21:46:57,672 INFO L125 PetriNetUnfolderBase]: For 2002547/2002549 co-relation queries the response was YES. [2024-06-27 21:46:57,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88829 conditions, 8255 events. 5249/8255 cut-off events. For 2002547/2002549 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 52556 event pairs, 910 based on Foata normal form. 2/8256 useless extension candidates. Maximal degree in co-relation 88591. Up to 7176 conditions per place. [2024-06-27 21:46:57,812 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 663 selfloop transitions, 234 changer transitions 0/902 dead transitions. [2024-06-27 21:46:57,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 902 transitions, 17238 flow [2024-06-27 21:46:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:46:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:46:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:46:57,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:46:57,814 INFO L175 Difference]: Start difference. First operand has 518 places, 848 transitions, 14068 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:46:57,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 902 transitions, 17238 flow [2024-06-27 21:47:05,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 902 transitions, 16877 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-27 21:47:05,447 INFO L231 Difference]: Finished difference. Result has 524 places, 868 transitions, 14924 flow [2024-06-27 21:47:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13707, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14924, PETRI_PLACES=524, PETRI_TRANSITIONS=868} [2024-06-27 21:47:05,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-27 21:47:05,448 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 868 transitions, 14924 flow [2024-06-27 21:47:05,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:05,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:05,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:47:05,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 21:47:05,448 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)] === [2024-06-27 21:47:05,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1620792720, now seen corresponding path program 5 times [2024-06-27 21:47:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:05,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665036301] [2024-06-27 21:47:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665036301] [2024-06-27 21:47:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665036301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:05,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:47:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383212677] [2024-06-27 21:47:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:47:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:47:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:47:05,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:47:05,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 868 transitions, 14924 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:05,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:05,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:47:05,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:08,873 INFO L124 PetriNetUnfolderBase]: 5254/8252 cut-off events. [2024-06-27 21:47:08,873 INFO L125 PetriNetUnfolderBase]: For 2019140/2019140 co-relation queries the response was YES. [2024-06-27 21:47:08,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90188 conditions, 8252 events. 5254/8252 cut-off events. For 2019140/2019140 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 52394 event pairs, 929 based on Foata normal form. 1/8250 useless extension candidates. Maximal degree in co-relation 89946. Up to 7601 conditions per place. [2024-06-27 21:47:09,016 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 727 selfloop transitions, 154 changer transitions 0/886 dead transitions. [2024-06-27 21:47:09,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 886 transitions, 17142 flow [2024-06-27 21:47:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:47:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:47:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:47:09,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:47:09,017 INFO L175 Difference]: Start difference. First operand has 524 places, 868 transitions, 14924 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:47:09,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 886 transitions, 17142 flow [2024-06-27 21:47:18,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 886 transitions, 16735 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-27 21:47:18,608 INFO L231 Difference]: Finished difference. Result has 527 places, 871 transitions, 14936 flow [2024-06-27 21:47:18,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14517, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14936, PETRI_PLACES=527, PETRI_TRANSITIONS=871} [2024-06-27 21:47:18,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-27 21:47:18,608 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 871 transitions, 14936 flow [2024-06-27 21:47:18,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:18,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:18,609 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] [2024-06-27 21:47:18,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 21:47:18,609 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)] === [2024-06-27 21:47:18,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1053834752, now seen corresponding path program 9 times [2024-06-27 21:47:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:18,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994579191] [2024-06-27 21:47:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:19,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994579191] [2024-06-27 21:47:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994579191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:47:19,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695229040] [2024-06-27 21:47:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:19,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:47:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:47:19,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:47:19,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:47:19,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 871 transitions, 14936 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:19,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:19,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:47:19,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:22,121 INFO L124 PetriNetUnfolderBase]: 5272/8291 cut-off events. [2024-06-27 21:47:22,121 INFO L125 PetriNetUnfolderBase]: For 2044660/2044662 co-relation queries the response was YES. [2024-06-27 21:47:22,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89575 conditions, 8291 events. 5272/8291 cut-off events. For 2044660/2044662 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 52784 event pairs, 908 based on Foata normal form. 2/8292 useless extension candidates. Maximal degree in co-relation 89331. Up to 7202 conditions per place. [2024-06-27 21:47:22,266 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 671 selfloop transitions, 235 changer transitions 0/911 dead transitions. [2024-06-27 21:47:22,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 911 transitions, 17777 flow [2024-06-27 21:47:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:47:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:47:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:47:22,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:47:22,273 INFO L175 Difference]: Start difference. First operand has 527 places, 871 transitions, 14936 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:47:22,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 911 transitions, 17777 flow [2024-06-27 21:47:32,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 911 transitions, 17411 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 21:47:32,686 INFO L231 Difference]: Finished difference. Result has 533 places, 878 transitions, 15411 flow [2024-06-27 21:47:32,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14571, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15411, PETRI_PLACES=533, PETRI_TRANSITIONS=878} [2024-06-27 21:47:32,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-27 21:47:32,687 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 878 transitions, 15411 flow [2024-06-27 21:47:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:32,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:32,687 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] [2024-06-27 21:47:32,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 21:47:32,687 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)] === [2024-06-27 21:47:32,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1024515222, now seen corresponding path program 6 times [2024-06-27 21:47:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:32,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483999361] [2024-06-27 21:47:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483999361] [2024-06-27 21:47:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483999361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:33,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:47:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938314084] [2024-06-27 21:47:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:47:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:47:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:47:33,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:47:33,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 878 transitions, 15411 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:33,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:33,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:47:33,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:36,037 INFO L124 PetriNetUnfolderBase]: 5269/8273 cut-off events. [2024-06-27 21:47:36,037 INFO L125 PetriNetUnfolderBase]: For 2047013/2047013 co-relation queries the response was YES. [2024-06-27 21:47:36,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90010 conditions, 8273 events. 5269/8273 cut-off events. For 2047013/2047013 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 52536 event pairs, 899 based on Foata normal form. 1/8271 useless extension candidates. Maximal degree in co-relation 89764. Up to 7623 conditions per place. [2024-06-27 21:47:36,182 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 715 selfloop transitions, 172 changer transitions 0/892 dead transitions. [2024-06-27 21:47:36,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 892 transitions, 17246 flow [2024-06-27 21:47:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:47:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:47:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:47:36,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:47:36,183 INFO L175 Difference]: Start difference. First operand has 533 places, 878 transitions, 15411 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:47:36,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 892 transitions, 17246 flow [2024-06-27 21:47:46,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 892 transitions, 16688 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-27 21:47:46,777 INFO L231 Difference]: Finished difference. Result has 535 places, 878 transitions, 15203 flow [2024-06-27 21:47:46,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14853, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15203, PETRI_PLACES=535, PETRI_TRANSITIONS=878} [2024-06-27 21:47:46,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-27 21:47:46,778 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 878 transitions, 15203 flow [2024-06-27 21:47:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:46,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:47:46,778 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] [2024-06-27 21:47:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 21:47:46,778 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)] === [2024-06-27 21:47:46,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:47:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1664257260, now seen corresponding path program 7 times [2024-06-27 21:47:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:47:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502722980] [2024-06-27 21:47:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:47:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:47:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:47:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:47:47,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:47:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502722980] [2024-06-27 21:47:47,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502722980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:47:47,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:47:47,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:47:47,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715970895] [2024-06-27 21:47:47,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:47:47,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:47:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:47:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:47:47,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:47:47,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:47:47,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 878 transitions, 15203 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:47:47,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:47:47,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:47:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:47:50,163 INFO L124 PetriNetUnfolderBase]: 5282/8291 cut-off events. [2024-06-27 21:47:50,163 INFO L125 PetriNetUnfolderBase]: For 2084751/2084755 co-relation queries the response was YES. [2024-06-27 21:47:50,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90027 conditions, 8291 events. 5282/8291 cut-off events. For 2084751/2084755 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 52654 event pairs, 970 based on Foata normal form. 5/8293 useless extension candidates. Maximal degree in co-relation 89780. Up to 7417 conditions per place. [2024-06-27 21:47:50,323 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 613 selfloop transitions, 279 changer transitions 0/897 dead transitions. [2024-06-27 21:47:50,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 897 transitions, 17816 flow [2024-06-27 21:47:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:47:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:47:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:47:50,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:47:50,324 INFO L175 Difference]: Start difference. First operand has 535 places, 878 transitions, 15203 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:47:50,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 897 transitions, 17816 flow [2024-06-27 21:48:02,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 897 transitions, 17356 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:48:02,468 INFO L231 Difference]: Finished difference. Result has 535 places, 884 transitions, 15489 flow [2024-06-27 21:48:02,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14743, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15489, PETRI_PLACES=535, PETRI_TRANSITIONS=884} [2024-06-27 21:48:02,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-27 21:48:02,469 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 884 transitions, 15489 flow [2024-06-27 21:48:02,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:02,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:02,470 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] [2024-06-27 21:48:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 21:48:02,470 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)] === [2024-06-27 21:48:02,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1917027536, now seen corresponding path program 10 times [2024-06-27 21:48:02,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672215113] [2024-06-27 21:48:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672215113] [2024-06-27 21:48:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672215113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:03,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:03,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:48:03,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172157521] [2024-06-27 21:48:03,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:03,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:48:03,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:48:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:48:03,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:48:03,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 884 transitions, 15489 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:03,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:03,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:48:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:06,015 INFO L124 PetriNetUnfolderBase]: 5292/8317 cut-off events. [2024-06-27 21:48:06,015 INFO L125 PetriNetUnfolderBase]: For 2124300/2124300 co-relation queries the response was YES. [2024-06-27 21:48:06,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90641 conditions, 8317 events. 5292/8317 cut-off events. For 2124300/2124300 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 52930 event pairs, 945 based on Foata normal form. 2/8318 useless extension candidates. Maximal degree in co-relation 90393. Up to 7901 conditions per place. [2024-06-27 21:48:06,162 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 839 selfloop transitions, 64 changer transitions 0/908 dead transitions. [2024-06-27 21:48:06,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 908 transitions, 17511 flow [2024-06-27 21:48:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:48:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:48:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:48:06,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:48:06,163 INFO L175 Difference]: Start difference. First operand has 535 places, 884 transitions, 15489 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:48:06,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 908 transitions, 17511 flow [2024-06-27 21:48:16,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 908 transitions, 16818 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 21:48:16,927 INFO L231 Difference]: Finished difference. Result has 540 places, 887 transitions, 15073 flow [2024-06-27 21:48:16,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14796, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15073, PETRI_PLACES=540, PETRI_TRANSITIONS=887} [2024-06-27 21:48:16,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-27 21:48:16,928 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 887 transitions, 15073 flow [2024-06-27 21:48:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:16,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:16,928 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] [2024-06-27 21:48:16,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 21:48:16,929 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)] === [2024-06-27 21:48:16,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1032187168, now seen corresponding path program 8 times [2024-06-27 21:48:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:16,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291353128] [2024-06-27 21:48:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:17,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:17,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291353128] [2024-06-27 21:48:17,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291353128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:17,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:17,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:48:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992739333] [2024-06-27 21:48:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:17,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:48:17,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:48:17,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:48:17,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:48:17,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 887 transitions, 15073 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:17,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:17,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:48:17,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:20,569 INFO L124 PetriNetUnfolderBase]: 5310/8339 cut-off events. [2024-06-27 21:48:20,569 INFO L125 PetriNetUnfolderBase]: For 2152073/2152073 co-relation queries the response was YES. [2024-06-27 21:48:20,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91172 conditions, 8339 events. 5310/8339 cut-off events. For 2152073/2152073 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53065 event pairs, 955 based on Foata normal form. 1/8337 useless extension candidates. Maximal degree in co-relation 90923. Up to 7849 conditions per place. [2024-06-27 21:48:20,713 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 813 selfloop transitions, 92 changer transitions 0/910 dead transitions. [2024-06-27 21:48:20,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 910 transitions, 17739 flow [2024-06-27 21:48:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:48:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:48:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:48:20,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-27 21:48:20,715 INFO L175 Difference]: Start difference. First operand has 540 places, 887 transitions, 15073 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:48:20,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 910 transitions, 17739 flow [2024-06-27 21:48:29,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 910 transitions, 17494 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 21:48:29,582 INFO L231 Difference]: Finished difference. Result has 544 places, 896 transitions, 15237 flow [2024-06-27 21:48:29,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14828, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15237, PETRI_PLACES=544, PETRI_TRANSITIONS=896} [2024-06-27 21:48:29,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-27 21:48:29,583 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 896 transitions, 15237 flow [2024-06-27 21:48:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:29,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:29,583 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] [2024-06-27 21:48:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 21:48:29,583 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)] === [2024-06-27 21:48:29,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash -526972712, now seen corresponding path program 9 times [2024-06-27 21:48:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:29,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173740444] [2024-06-27 21:48:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:29,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:30,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:30,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173740444] [2024-06-27 21:48:30,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173740444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:30,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:30,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:48:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158885893] [2024-06-27 21:48:30,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:48:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:48:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:48:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:48:30,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 896 transitions, 15237 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:30,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:30,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:48:30,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:48:33,065 INFO L124 PetriNetUnfolderBase]: 5307/8335 cut-off events. [2024-06-27 21:48:33,066 INFO L125 PetriNetUnfolderBase]: For 2164022/2164022 co-relation queries the response was YES. [2024-06-27 21:48:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91016 conditions, 8335 events. 5307/8335 cut-off events. For 2164022/2164022 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53054 event pairs, 955 based on Foata normal form. 1/8333 useless extension candidates. Maximal degree in co-relation 90765. Up to 7846 conditions per place. [2024-06-27 21:48:33,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 814 selfloop transitions, 88 changer transitions 0/907 dead transitions. [2024-06-27 21:48:33,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 907 transitions, 17383 flow [2024-06-27 21:48:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:48:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:48:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:48:33,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:48:33,220 INFO L175 Difference]: Start difference. First operand has 544 places, 896 transitions, 15237 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:48:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 907 transitions, 17383 flow [2024-06-27 21:48:42,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 907 transitions, 16946 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 21:48:42,972 INFO L231 Difference]: Finished difference. Result has 546 places, 896 transitions, 14985 flow [2024-06-27 21:48:42,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14800, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14985, PETRI_PLACES=546, PETRI_TRANSITIONS=896} [2024-06-27 21:48:42,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-27 21:48:42,972 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 896 transitions, 14985 flow [2024-06-27 21:48:42,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:42,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:48:42,973 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] [2024-06-27 21:48:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 21:48:42,973 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)] === [2024-06-27 21:48:42,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:48:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash -521466182, now seen corresponding path program 10 times [2024-06-27 21:48:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:48:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678986970] [2024-06-27 21:48:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:48:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:48:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:48:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:48:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:48:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678986970] [2024-06-27 21:48:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678986970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:48:43,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:48:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:48:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835157472] [2024-06-27 21:48:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:48:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:48:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:48:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:48:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:48:43,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:48:43,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 896 transitions, 14985 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:48:43,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:48:43,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:48:43,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand