./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_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.2024-05-21_14-57-05.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_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-bcb38a6-m [2024-06-03 20:08:33,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:08:33,636 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:08:33,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:08:33,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:08:33,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:08:33,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:08:33,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:08:33,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:08:33,657 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:08:33,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:08:33,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:08:33,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:08:33,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:08:33,658 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:08:33,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:08:33,659 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:08:33,659 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:08:33,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:08:33,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:08:33,660 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:08:33,660 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:08:33,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:08:33,661 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:08:33,661 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:08:33,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:08:33,661 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:08:33,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:08:33,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:08:33,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:08:33,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:08:33,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:08:33,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:08:33,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:08:33,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:08:33,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:08:33,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:08:33,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:08:33,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:08:33,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:08:33,664 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:08:33,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:08:33,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:08:33,665 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:08:33,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:08:33,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:08:33,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:08:33,856 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:08:33,856 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:08:33,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:08:34,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:08:35,042 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:08:35,043 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:08:35,054 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae48c7f8b/a9de4b101d32495cbc3efda080586dea/FLAG3408cdd56 [2024-06-03 20:08:35,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae48c7f8b/a9de4b101d32495cbc3efda080586dea [2024-06-03 20:08:35,076 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:08:35,079 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:08:35,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-03 20:08:35,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:08:35,219 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:08:35,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:08:35,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:08:35,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:08:35,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:08:35" (1/2) ... [2024-06-03 20:08:35,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c144757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:08:35, skipping insertion in model container [2024-06-03 20:08:35,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:08:35" (1/2) ... [2024-06-03 20:08:35,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a7ba9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:08:35, skipping insertion in model container [2024-06-03 20:08:35,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:08:35" (2/2) ... [2024-06-03 20:08:35,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c144757 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35, skipping insertion in model container [2024-06-03 20:08:35,231 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:08:35" (2/2) ... [2024-06-03 20:08:35,231 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:08:35,353 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:08:35,383 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) [2024-06-03 20:08:35,384 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) [2024-06-03 20:08:35,384 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) [2024-06-03 20:08:35,384 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:08:35,384 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-03 20:08:35,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:08:35,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:08:35,786 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:08:35,872 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:08:35,903 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:08:35,904 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35 WrapperNode [2024-06-03 20:08:35,904 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:08:35,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:08:35,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:08:35,905 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:08:35,910 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 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:35,939 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 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:35,969 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-03 20:08:35,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:08:35,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:08:35,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:08:35,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:08:35,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:35,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:35,992 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,007 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:08:36,013 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,030 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:08:36,039 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:08:36,039 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:08:36,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:08:36,040 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (1/1) ... [2024-06-03 20:08:36,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:08:36,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:08:36,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:08:36,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:08:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:08:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:08:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:08:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:08:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:08:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:08:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:08:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:08:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:08:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:08:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:08:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:08:36,120 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:08:36,268 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:08:36,270 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:08:36,602 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:08:36,602 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:08:36,746 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:08:36,746 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:08:36,747 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:08:36 BoogieIcfgContainer [2024-06-03 20:08:36,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:08:36,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:08:36,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:08:36,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:08:36,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:08:35" (1/4) ... [2024-06-03 20:08:36,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797df8bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:08:36, skipping insertion in model container [2024-06-03 20:08:36,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:08:35" (2/4) ... [2024-06-03 20:08:36,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797df8bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:08:36, skipping insertion in model container [2024-06-03 20:08:36,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:08:35" (3/4) ... [2024-06-03 20:08:36,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797df8bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:08:36, skipping insertion in model container [2024-06-03 20:08:36,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:08:36" (4/4) ... [2024-06-03 20:08:36,755 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:08:36,771 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:08:36,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:08:36,772 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:08:36,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:08:36,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:08:36,898 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:08:36,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:08:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:08:36,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:08:36,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:08:36,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:08:36,928 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;@49419e9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:08:36,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:08:36,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:08:36,937 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:08:36,937 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:08:36,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:36,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:08:36,939 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)] === [2024-06-03 20:08:36,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1642982905, now seen corresponding path program 1 times [2024-06-03 20:08:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54320088] [2024-06-03 20:08:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:37,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54320088] [2024-06-03 20:08:37,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54320088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:37,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:37,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:08:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904681267] [2024-06-03 20:08:37,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:37,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:08:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:08:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:08:37,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 20:08:37,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:37,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:37,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 20:08:37,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:38,241 INFO L124 PetriNetUnfolderBase]: 1152/1762 cut-off events. [2024-06-03 20:08:38,241 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 20:08:38,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1762 events. 1152/1762 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8442 event pairs, 785 based on Foata normal form. 1/1726 useless extension candidates. Maximal degree in co-relation 3566. Up to 1732 conditions per place. [2024-06-03 20:08:38,255 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:08:38,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-03 20:08:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:08:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:08:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-03 20:08:38,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 20:08:38,266 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-03 20:08:38,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-03 20:08:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:08:38,272 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:08:38,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:08:38,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:08:38,280 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:08:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:38,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:38,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:38,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:08:38,281 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)] === [2024-06-03 20:08:38,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1641423846, now seen corresponding path program 1 times [2024-06-03 20:08:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:38,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831428359] [2024-06-03 20:08:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:38,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:38,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831428359] [2024-06-03 20:08:38,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831428359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:38,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:38,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:08:38,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350663538] [2024-06-03 20:08:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:08:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:08:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:08:38,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 20:08:38,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:38,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:38,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 20:08:38,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:39,163 INFO L124 PetriNetUnfolderBase]: 1168/1796 cut-off events. [2024-06-03 20:08:39,163 INFO L125 PetriNetUnfolderBase]: For 366/374 co-relation queries the response was YES. [2024-06-03 20:08:39,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4131 conditions, 1796 events. 1168/1796 cut-off events. For 366/374 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8652 event pairs, 595 based on Foata normal form. 13/1807 useless extension candidates. Maximal degree in co-relation 4116. Up to 1669 conditions per place. [2024-06-03 20:08:39,171 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-06-03 20:08:39,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 288 flow [2024-06-03 20:08:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:08:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:08:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-03 20:08:39,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-03 20:08:39,173 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 106 transitions. [2024-06-03 20:08:39,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 288 flow [2024-06-03 20:08:39,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:08:39,175 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-03 20:08:39,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-03 20:08:39,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 20:08:39,176 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-03 20:08:39,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:39,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:39,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:39,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:08:39,176 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)] === [2024-06-03 20:08:39,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 928727222, now seen corresponding path program 1 times [2024-06-03 20:08:39,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:39,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807466317] [2024-06-03 20:08:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807466317] [2024-06-03 20:08:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807466317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:39,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:39,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:08:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325869726] [2024-06-03 20:08:39,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:08:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:08:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:08:39,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:08:39,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:39,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:39,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:08:39,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:40,221 INFO L124 PetriNetUnfolderBase]: 1163/1789 cut-off events. [2024-06-03 20:08:40,222 INFO L125 PetriNetUnfolderBase]: For 1184/1202 co-relation queries the response was YES. [2024-06-03 20:08:40,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 1789 events. 1163/1789 cut-off events. For 1184/1202 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8575 event pairs, 690 based on Foata normal form. 8/1795 useless extension candidates. Maximal degree in co-relation 4869. Up to 1738 conditions per place. [2024-06-03 20:08:40,232 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-03 20:08:40,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 320 flow [2024-06-03 20:08:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:08:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:08:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-03 20:08:40,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-03 20:08:40,235 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 5 states and 101 transitions. [2024-06-03 20:08:40,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 320 flow [2024-06-03 20:08:40,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 316 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:08:40,239 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 214 flow [2024-06-03 20:08:40,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-03 20:08:40,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:08:40,240 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 214 flow [2024-06-03 20:08:40,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:40,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:40,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:40,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:08:40,241 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)] === [2024-06-03 20:08:40,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:40,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2104202332, now seen corresponding path program 1 times [2024-06-03 20:08:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:40,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367802744] [2024-06-03 20:08:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:41,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367802744] [2024-06-03 20:08:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367802744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:41,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:41,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:08:41,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502920027] [2024-06-03 20:08:41,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:41,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:08:41,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:08:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:08:41,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 20:08:41,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:41,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:41,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 20:08:41,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:41,714 INFO L124 PetriNetUnfolderBase]: 1203/1853 cut-off events. [2024-06-03 20:08:41,714 INFO L125 PetriNetUnfolderBase]: For 2088/2112 co-relation queries the response was YES. [2024-06-03 20:08:41,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 1853 events. 1203/1853 cut-off events. For 2088/2112 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8960 event pairs, 389 based on Foata normal form. 25/1876 useless extension candidates. Maximal degree in co-relation 5484. Up to 1638 conditions per place. [2024-06-03 20:08:41,724 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-03 20:08:41,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 496 flow [2024-06-03 20:08:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:08:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:08:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:08:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-03 20:08:41,728 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 214 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:08:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 496 flow [2024-06-03 20:08:41,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 476 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:08:41,731 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 274 flow [2024-06-03 20:08:41,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-03 20:08:41,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-03 20:08:41,732 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 274 flow [2024-06-03 20:08:41,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:41,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:41,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:41,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:08:41,733 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)] === [2024-06-03 20:08:41,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1239370335, now seen corresponding path program 1 times [2024-06-03 20:08:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150345815] [2024-06-03 20:08:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:41,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:42,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:42,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150345815] [2024-06-03 20:08:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150345815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:42,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:42,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:08:42,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676251842] [2024-06-03 20:08:42,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:08:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:42,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:08:42,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:08:42,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:42,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:42,794 INFO L124 PetriNetUnfolderBase]: 1388/2115 cut-off events. [2024-06-03 20:08:42,795 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-06-03 20:08:42,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6841 conditions, 2115 events. 1388/2115 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10278 event pairs, 597 based on Foata normal form. 2/2116 useless extension candidates. Maximal degree in co-relation 6818. Up to 2060 conditions per place. [2024-06-03 20:08:42,806 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-03 20:08:42,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 500 flow [2024-06-03 20:08:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:08:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:08:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-03 20:08:42,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-03 20:08:42,808 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 274 flow. Second operand 6 states and 113 transitions. [2024-06-03 20:08:42,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 500 flow [2024-06-03 20:08:42,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 460 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:08:42,814 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 332 flow [2024-06-03 20:08:42,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-03 20:08:42,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-03 20:08:42,816 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 332 flow [2024-06-03 20:08:42,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:42,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:42,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:42,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:08:42,820 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)] === [2024-06-03 20:08:42,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash -852968043, now seen corresponding path program 1 times [2024-06-03 20:08:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:42,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524575722] [2024-06-03 20:08:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524575722] [2024-06-03 20:08:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524575722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:43,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:08:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222003616] [2024-06-03 20:08:43,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:08:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:08:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:08:43,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:08:43,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:43,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:43,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:08:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:43,854 INFO L124 PetriNetUnfolderBase]: 1372/2118 cut-off events. [2024-06-03 20:08:43,854 INFO L125 PetriNetUnfolderBase]: For 5013/5045 co-relation queries the response was YES. [2024-06-03 20:08:43,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7280 conditions, 2118 events. 1372/2118 cut-off events. For 5013/5045 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10479 event pairs, 515 based on Foata normal form. 20/2130 useless extension candidates. Maximal degree in co-relation 7253. Up to 1986 conditions per place. [2024-06-03 20:08:43,866 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 66 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-03 20:08:43,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 621 flow [2024-06-03 20:08:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:08:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:08:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-03 20:08:43,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-03 20:08:43,868 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 332 flow. Second operand 6 states and 128 transitions. [2024-06-03 20:08:43,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 621 flow [2024-06-03 20:08:43,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 613 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-03 20:08:43,873 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 465 flow [2024-06-03 20:08:43,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-03 20:08:43,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-03 20:08:43,875 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 465 flow [2024-06-03 20:08:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:43,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:43,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:43,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:08:43,876 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)] === [2024-06-03 20:08:43,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash -846301803, now seen corresponding path program 2 times [2024-06-03 20:08:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725249451] [2024-06-03 20:08:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:44,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:44,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725249451] [2024-06-03 20:08:44,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725249451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:44,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:44,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:08:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214813088] [2024-06-03 20:08:44,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:44,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:08:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:08:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:08:44,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:08:44,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:44,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:44,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:08:44,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:44,963 INFO L124 PetriNetUnfolderBase]: 1462/2261 cut-off events. [2024-06-03 20:08:44,964 INFO L125 PetriNetUnfolderBase]: For 7415/7442 co-relation queries the response was YES. [2024-06-03 20:08:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8986 conditions, 2261 events. 1462/2261 cut-off events. For 7415/7442 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11369 event pairs, 520 based on Foata normal form. 17/2267 useless extension candidates. Maximal degree in co-relation 8954. Up to 2014 conditions per place. [2024-06-03 20:08:44,986 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 67 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-03 20:08:44,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 797 flow [2024-06-03 20:08:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:08:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:08:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 20:08:44,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-03 20:08:44,989 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 465 flow. Second operand 6 states and 129 transitions. [2024-06-03 20:08:44,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 797 flow [2024-06-03 20:08:44,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 767 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:08:44,996 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 580 flow [2024-06-03 20:08:44,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=580, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-03 20:08:44,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-03 20:08:44,997 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 580 flow [2024-06-03 20:08:44,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:44,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:44,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:44,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:08:44,998 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)] === [2024-06-03 20:08:44,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash 234226695, now seen corresponding path program 1 times [2024-06-03 20:08:44,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:44,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255397691] [2024-06-03 20:08:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:44,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:45,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:45,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255397691] [2024-06-03 20:08:45,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255397691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:45,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:45,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:08:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279661787] [2024-06-03 20:08:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:45,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:08:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:08:45,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:08:45,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:45,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 580 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:45,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:45,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:45,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:46,272 INFO L124 PetriNetUnfolderBase]: 1511/2321 cut-off events. [2024-06-03 20:08:46,272 INFO L125 PetriNetUnfolderBase]: For 9557/9557 co-relation queries the response was YES. [2024-06-03 20:08:46,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9804 conditions, 2321 events. 1511/2321 cut-off events. For 9557/9557 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11525 event pairs, 578 based on Foata normal form. 2/2322 useless extension candidates. Maximal degree in co-relation 9769. Up to 2226 conditions per place. [2024-06-03 20:08:46,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-03 20:08:46,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 840 flow [2024-06-03 20:08:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:08:46,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:08:46,290 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 580 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:08:46,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 840 flow [2024-06-03 20:08:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 102 transitions, 801 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-03 20:08:46,298 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 601 flow [2024-06-03 20:08:46,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-06-03 20:08:46,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-03 20:08:46,299 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 601 flow [2024-06-03 20:08:46,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:46,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:46,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:46,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:08:46,300 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)] === [2024-06-03 20:08:46,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 233987930, now seen corresponding path program 1 times [2024-06-03 20:08:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074854379] [2024-06-03 20:08:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074854379] [2024-06-03 20:08:47,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074854379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:47,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:47,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:08:47,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393457055] [2024-06-03 20:08:47,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:47,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:08:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:47,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:08:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:08:47,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:47,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 601 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:47,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:47,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:47,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:47,613 INFO L124 PetriNetUnfolderBase]: 1533/2361 cut-off events. [2024-06-03 20:08:47,613 INFO L125 PetriNetUnfolderBase]: For 10850/10850 co-relation queries the response was YES. [2024-06-03 20:08:47,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10317 conditions, 2361 events. 1533/2361 cut-off events. For 10850/10850 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11655 event pairs, 540 based on Foata normal form. 4/2364 useless extension candidates. Maximal degree in co-relation 10280. Up to 2229 conditions per place. [2024-06-03 20:08:47,629 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-03 20:08:47,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 955 flow [2024-06-03 20:08:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 20:08:47,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-03 20:08:47,630 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 601 flow. Second operand 7 states and 135 transitions. [2024-06-03 20:08:47,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 955 flow [2024-06-03 20:08:47,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 116 transitions, 919 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:47,639 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 687 flow [2024-06-03 20:08:47,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=687, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-03 20:08:47,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-03 20:08:47,640 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 687 flow [2024-06-03 20:08:47,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:47,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:47,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:47,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:08:47,641 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)] === [2024-06-03 20:08:47,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1328915520, now seen corresponding path program 2 times [2024-06-03 20:08:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:47,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599181089] [2024-06-03 20:08:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:48,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599181089] [2024-06-03 20:08:48,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599181089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:48,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:48,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:08:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685646166] [2024-06-03 20:08:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:08:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:08:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:08:48,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:48,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 687 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:48,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:48,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:48,807 INFO L124 PetriNetUnfolderBase]: 1571/2416 cut-off events. [2024-06-03 20:08:48,807 INFO L125 PetriNetUnfolderBase]: For 13465/13465 co-relation queries the response was YES. [2024-06-03 20:08:48,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11136 conditions, 2416 events. 1571/2416 cut-off events. For 13465/13465 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11985 event pairs, 539 based on Foata normal form. 4/2418 useless extension candidates. Maximal degree in co-relation 11096. Up to 2201 conditions per place. [2024-06-03 20:08:48,823 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 93 selfloop transitions, 29 changer transitions 0/127 dead transitions. [2024-06-03 20:08:48,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 127 transitions, 1133 flow [2024-06-03 20:08:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:08:48,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:08:48,826 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 687 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:08:48,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 127 transitions, 1133 flow [2024-06-03 20:08:48,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 127 transitions, 1106 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:08:48,836 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 831 flow [2024-06-03 20:08:48,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=831, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2024-06-03 20:08:48,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 20:08:48,839 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 831 flow [2024-06-03 20:08:48,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:48,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:48,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:48,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:08:48,840 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)] === [2024-06-03 20:08:48,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -465550732, now seen corresponding path program 3 times [2024-06-03 20:08:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091260844] [2024-06-03 20:08:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:49,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:49,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091260844] [2024-06-03 20:08:49,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091260844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:49,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:49,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:08:49,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553587545] [2024-06-03 20:08:49,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:49,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:08:49,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:08:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:08:49,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:49,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 831 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:49,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:49,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:49,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:49,969 INFO L124 PetriNetUnfolderBase]: 1561/2402 cut-off events. [2024-06-03 20:08:49,969 INFO L125 PetriNetUnfolderBase]: For 16027/16027 co-relation queries the response was YES. [2024-06-03 20:08:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 2402 events. 1561/2402 cut-off events. For 16027/16027 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11936 event pairs, 550 based on Foata normal form. 4/2404 useless extension candidates. Maximal degree in co-relation 11665. Up to 2193 conditions per place. [2024-06-03 20:08:49,984 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 27 changer transitions 0/124 dead transitions. [2024-06-03 20:08:49,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 124 transitions, 1133 flow [2024-06-03 20:08:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 20:08:49,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 20:08:49,986 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 831 flow. Second operand 7 states and 137 transitions. [2024-06-03 20:08:49,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 124 transitions, 1133 flow [2024-06-03 20:08:49,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 1099 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-03 20:08:49,998 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 859 flow [2024-06-03 20:08:49,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=859, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-03 20:08:49,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-03 20:08:49,999 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 859 flow [2024-06-03 20:08:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:49,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:49,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:50,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:08:50,000 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)] === [2024-06-03 20:08:50,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1328905600, now seen corresponding path program 1 times [2024-06-03 20:08:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:50,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123320335] [2024-06-03 20:08:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:50,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123320335] [2024-06-03 20:08:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123320335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:51,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:51,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937889672] [2024-06-03 20:08:51,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:51,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:51,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:51,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:51,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 859 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:51,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:51,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:51,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:51,852 INFO L124 PetriNetUnfolderBase]: 1553/2395 cut-off events. [2024-06-03 20:08:51,853 INFO L125 PetriNetUnfolderBase]: For 17563/17563 co-relation queries the response was YES. [2024-06-03 20:08:51,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11746 conditions, 2395 events. 1553/2395 cut-off events. For 17563/17563 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11925 event pairs, 576 based on Foata normal form. 4/2398 useless extension candidates. Maximal degree in co-relation 11699. Up to 2269 conditions per place. [2024-06-03 20:08:51,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 18 changer transitions 0/130 dead transitions. [2024-06-03 20:08:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1210 flow [2024-06-03 20:08:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:08:51,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:08:51,875 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 859 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:08:51,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1210 flow [2024-06-03 20:08:51,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 1122 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:51,890 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 866 flow [2024-06-03 20:08:51,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=866, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-06-03 20:08:51,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 20:08:51,891 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 866 flow [2024-06-03 20:08:51,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:51,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:51,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:51,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:08:51,891 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:51,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1775255112, now seen corresponding path program 1 times [2024-06-03 20:08:51,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:51,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566595826] [2024-06-03 20:08:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:51,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566595826] [2024-06-03 20:08:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566595826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:52,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:08:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225547033] [2024-06-03 20:08:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:08:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:08:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:08:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:08:52,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 866 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:52,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:52,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:08:52,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:53,458 INFO L124 PetriNetUnfolderBase]: 1496/2330 cut-off events. [2024-06-03 20:08:53,459 INFO L125 PetriNetUnfolderBase]: For 21378/21408 co-relation queries the response was YES. [2024-06-03 20:08:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11718 conditions, 2330 events. 1496/2330 cut-off events. For 21378/21408 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11907 event pairs, 541 based on Foata normal form. 23/2304 useless extension candidates. Maximal degree in co-relation 11671. Up to 2072 conditions per place. [2024-06-03 20:08:53,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 30 changer transitions 0/139 dead transitions. [2024-06-03 20:08:53,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1264 flow [2024-06-03 20:08:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-03 20:08:53,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-03 20:08:53,474 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 866 flow. Second operand 7 states and 153 transitions. [2024-06-03 20:08:53,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1264 flow [2024-06-03 20:08:53,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 139 transitions, 1217 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:53,487 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 938 flow [2024-06-03 20:08:53,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=938, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-03 20:08:53,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 20:08:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 938 flow [2024-06-03 20:08:53,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:53,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:53,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:53,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:08:53,488 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)] === [2024-06-03 20:08:53,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1517117896, now seen corresponding path program 1 times [2024-06-03 20:08:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:53,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955930460] [2024-06-03 20:08:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955930460] [2024-06-03 20:08:54,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955930460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:54,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:54,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:54,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032833697] [2024-06-03 20:08:54,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:54,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:54,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:54,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 938 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:54,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:54,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:54,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:55,085 INFO L124 PetriNetUnfolderBase]: 1576/2423 cut-off events. [2024-06-03 20:08:55,085 INFO L125 PetriNetUnfolderBase]: For 22785/22785 co-relation queries the response was YES. [2024-06-03 20:08:55,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12555 conditions, 2423 events. 1576/2423 cut-off events. For 22785/22785 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11908 event pairs, 465 based on Foata normal form. 6/2428 useless extension candidates. Maximal degree in co-relation 12507. Up to 2264 conditions per place. [2024-06-03 20:08:55,101 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 123 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2024-06-03 20:08:55,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 155 transitions, 1467 flow [2024-06-03 20:08:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:08:55,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:08:55,103 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 938 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:08:55,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 155 transitions, 1467 flow [2024-06-03 20:08:55,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 1361 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:55,118 INFO L231 Difference]: Finished difference. Result has 105 places, 130 transitions, 1112 flow [2024-06-03 20:08:55,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1112, PETRI_PLACES=105, PETRI_TRANSITIONS=130} [2024-06-03 20:08:55,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-03 20:08:55,119 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 130 transitions, 1112 flow [2024-06-03 20:08:55,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:55,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:55,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:08:55,120 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)] === [2024-06-03 20:08:55,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1753293256, now seen corresponding path program 2 times [2024-06-03 20:08:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:55,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889512775] [2024-06-03 20:08:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:56,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889512775] [2024-06-03 20:08:56,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889512775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:56,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:56,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:56,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925936429] [2024-06-03 20:08:56,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:56,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:56,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:56,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:56,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 130 transitions, 1112 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:56,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:56,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:56,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:56,565 INFO L124 PetriNetUnfolderBase]: 1587/2445 cut-off events. [2024-06-03 20:08:56,565 INFO L125 PetriNetUnfolderBase]: For 28536/28536 co-relation queries the response was YES. [2024-06-03 20:08:56,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13468 conditions, 2445 events. 1587/2445 cut-off events. For 28536/28536 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12122 event pairs, 442 based on Foata normal form. 2/2445 useless extension candidates. Maximal degree in co-relation 13416. Up to 2277 conditions per place. [2024-06-03 20:08:56,581 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 31 changer transitions 0/164 dead transitions. [2024-06-03 20:08:56,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 164 transitions, 1572 flow [2024-06-03 20:08:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:08:56,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:08:56,583 INFO L175 Difference]: Start difference. First operand has 105 places, 130 transitions, 1112 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:08:56,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 164 transitions, 1572 flow [2024-06-03 20:08:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 164 transitions, 1511 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-03 20:08:56,604 INFO L231 Difference]: Finished difference. Result has 114 places, 142 transitions, 1251 flow [2024-06-03 20:08:56,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1251, PETRI_PLACES=114, PETRI_TRANSITIONS=142} [2024-06-03 20:08:56,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-03 20:08:56,605 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 142 transitions, 1251 flow [2024-06-03 20:08:56,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:56,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:56,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:56,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:08:56,606 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)] === [2024-06-03 20:08:56,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1538598508, now seen corresponding path program 3 times [2024-06-03 20:08:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:56,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450461000] [2024-06-03 20:08:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:57,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:57,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450461000] [2024-06-03 20:08:57,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450461000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:57,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:57,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297267153] [2024-06-03 20:08:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:57,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:57,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 142 transitions, 1251 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:57,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:57,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:57,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:58,008 INFO L124 PetriNetUnfolderBase]: 1598/2461 cut-off events. [2024-06-03 20:08:58,008 INFO L125 PetriNetUnfolderBase]: For 31855/31855 co-relation queries the response was YES. [2024-06-03 20:08:58,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14112 conditions, 2461 events. 1598/2461 cut-off events. For 31855/31855 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12144 event pairs, 442 based on Foata normal form. 2/2461 useless extension candidates. Maximal degree in co-relation 14055. Up to 2255 conditions per place. [2024-06-03 20:08:58,029 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2024-06-03 20:08:58,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 174 transitions, 1783 flow [2024-06-03 20:08:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:08:58,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 20:08:58,032 INFO L175 Difference]: Start difference. First operand has 114 places, 142 transitions, 1251 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:08:58,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 174 transitions, 1783 flow [2024-06-03 20:08:58,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 174 transitions, 1742 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:08:58,054 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1398 flow [2024-06-03 20:08:58,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1398, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-03 20:08:58,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-03 20:08:58,055 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1398 flow [2024-06-03 20:08:58,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:58,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:58,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:58,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:08:58,055 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:58,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1745019046, now seen corresponding path program 4 times [2024-06-03 20:08:58,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:58,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801418510] [2024-06-03 20:08:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:58,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801418510] [2024-06-03 20:08:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801418510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:58,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360103013] [2024-06-03 20:08:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:58,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:59,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:08:59,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1398 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:59,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:59,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:08:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:59,512 INFO L124 PetriNetUnfolderBase]: 1593/2454 cut-off events. [2024-06-03 20:08:59,513 INFO L125 PetriNetUnfolderBase]: For 35222/35222 co-relation queries the response was YES. [2024-06-03 20:08:59,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14640 conditions, 2454 events. 1593/2454 cut-off events. For 35222/35222 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12095 event pairs, 442 based on Foata normal form. 2/2454 useless extension candidates. Maximal degree in co-relation 14580. Up to 2286 conditions per place. [2024-06-03 20:08:59,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-03 20:08:59,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 172 transitions, 1788 flow [2024-06-03 20:08:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:08:59,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-03 20:08:59,531 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1398 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:08:59,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 172 transitions, 1788 flow [2024-06-03 20:08:59,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 172 transitions, 1721 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:59,555 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1399 flow [2024-06-03 20:08:59,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1399, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-03 20:08:59,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-03 20:08:59,556 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1399 flow [2024-06-03 20:08:59,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:59,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:59,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:59,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:08:59,557 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:59,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1474975351, now seen corresponding path program 1 times [2024-06-03 20:08:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:59,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254144658] [2024-06-03 20:08:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:59,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:00,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:00,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254144658] [2024-06-03 20:09:00,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254144658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:00,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:00,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:09:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241206178] [2024-06-03 20:09:00,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:09:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:09:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:09:00,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:00,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1399 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:00,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:00,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:00,610 INFO L124 PetriNetUnfolderBase]: 1542/2370 cut-off events. [2024-06-03 20:09:00,610 INFO L125 PetriNetUnfolderBase]: For 35921/35921 co-relation queries the response was YES. [2024-06-03 20:09:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14268 conditions, 2370 events. 1542/2370 cut-off events. For 35921/35921 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11680 event pairs, 437 based on Foata normal form. 6/2372 useless extension candidates. Maximal degree in co-relation 14206. Up to 2215 conditions per place. [2024-06-03 20:09:00,626 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 134 selfloop transitions, 22 changer transitions 0/161 dead transitions. [2024-06-03 20:09:00,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 161 transitions, 1755 flow [2024-06-03 20:09:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:09:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:09:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-03 20:09:00,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:09:00,628 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1399 flow. Second operand 5 states and 100 transitions. [2024-06-03 20:09:00,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 161 transitions, 1755 flow [2024-06-03 20:09:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 161 transitions, 1680 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:00,655 INFO L231 Difference]: Finished difference. Result has 126 places, 150 transitions, 1379 flow [2024-06-03 20:09:00,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1379, PETRI_PLACES=126, PETRI_TRANSITIONS=150} [2024-06-03 20:09:00,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-03 20:09:00,656 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 150 transitions, 1379 flow [2024-06-03 20:09:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:00,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:00,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:09:00,656 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)] === [2024-06-03 20:09:00,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:00,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1227077583, now seen corresponding path program 1 times [2024-06-03 20:09:00,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605105064] [2024-06-03 20:09:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:01,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605105064] [2024-06-03 20:09:01,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605105064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:01,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:01,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:01,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732504361] [2024-06-03 20:09:01,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:01,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:01,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:01,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:01,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 150 transitions, 1379 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:01,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:01,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:01,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:02,533 INFO L124 PetriNetUnfolderBase]: 1645/2556 cut-off events. [2024-06-03 20:09:02,534 INFO L125 PetriNetUnfolderBase]: For 42852/42852 co-relation queries the response was YES. [2024-06-03 20:09:02,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15112 conditions, 2556 events. 1645/2556 cut-off events. For 42852/42852 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12942 event pairs, 400 based on Foata normal form. 26/2581 useless extension candidates. Maximal degree in co-relation 15050. Up to 2195 conditions per place. [2024-06-03 20:09:02,552 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 38 changer transitions 0/189 dead transitions. [2024-06-03 20:09:02,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 189 transitions, 1927 flow [2024-06-03 20:09:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 20:09:02,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-03 20:09:02,554 INFO L175 Difference]: Start difference. First operand has 126 places, 150 transitions, 1379 flow. Second operand 9 states and 177 transitions. [2024-06-03 20:09:02,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 189 transitions, 1927 flow [2024-06-03 20:09:02,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 189 transitions, 1870 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:02,585 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1499 flow [2024-06-03 20:09:02,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1499, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2024-06-03 20:09:02,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-03 20:09:02,586 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1499 flow [2024-06-03 20:09:02,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:02,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:02,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:02,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:09:02,587 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)] === [2024-06-03 20:09:02,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1718601321, now seen corresponding path program 2 times [2024-06-03 20:09:02,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937726296] [2024-06-03 20:09:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937726296] [2024-06-03 20:09:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937726296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:03,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:03,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:03,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285856736] [2024-06-03 20:09:03,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:03,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:03,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:03,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:03,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1499 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:03,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:03,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:03,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:04,160 INFO L124 PetriNetUnfolderBase]: 1662/2583 cut-off events. [2024-06-03 20:09:04,160 INFO L125 PetriNetUnfolderBase]: For 47188/47188 co-relation queries the response was YES. [2024-06-03 20:09:04,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16114 conditions, 2583 events. 1662/2583 cut-off events. For 47188/47188 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13072 event pairs, 390 based on Foata normal form. 4/2585 useless extension candidates. Maximal degree in co-relation 16051. Up to 2386 conditions per place. [2024-06-03 20:09:04,180 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 147 selfloop transitions, 32 changer transitions 0/184 dead transitions. [2024-06-03 20:09:04,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 184 transitions, 1953 flow [2024-06-03 20:09:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:09:04,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 20:09:04,182 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1499 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:09:04,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 184 transitions, 1953 flow [2024-06-03 20:09:04,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 184 transitions, 1882 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:04,218 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1531 flow [2024-06-03 20:09:04,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1531, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-03 20:09:04,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 20:09:04,219 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1531 flow [2024-06-03 20:09:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:04,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:04,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:09:04,221 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)] === [2024-06-03 20:09:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1482482465, now seen corresponding path program 3 times [2024-06-03 20:09:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:04,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231549257] [2024-06-03 20:09:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:05,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:05,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231549257] [2024-06-03 20:09:05,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231549257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:05,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:05,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483241225] [2024-06-03 20:09:05,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:05,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:05,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:05,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1531 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:05,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:05,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:05,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:06,154 INFO L124 PetriNetUnfolderBase]: 1679/2620 cut-off events. [2024-06-03 20:09:06,155 INFO L125 PetriNetUnfolderBase]: For 47720/47720 co-relation queries the response was YES. [2024-06-03 20:09:06,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16341 conditions, 2620 events. 1679/2620 cut-off events. For 47720/47720 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13353 event pairs, 464 based on Foata normal form. 4/2622 useless extension candidates. Maximal degree in co-relation 16276. Up to 2372 conditions per place. [2024-06-03 20:09:06,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 136 selfloop transitions, 41 changer transitions 0/182 dead transitions. [2024-06-03 20:09:06,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 182 transitions, 1975 flow [2024-06-03 20:09:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 20:09:06,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:09:06,174 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1531 flow. Second operand 8 states and 152 transitions. [2024-06-03 20:09:06,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 182 transitions, 1975 flow [2024-06-03 20:09:06,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 182 transitions, 1890 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:06,207 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 1572 flow [2024-06-03 20:09:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1572, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2024-06-03 20:09:06,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-03 20:09:06,208 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 1572 flow [2024-06-03 20:09:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:06,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:06,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:09:06,209 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)] === [2024-06-03 20:09:06,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1472959265, now seen corresponding path program 4 times [2024-06-03 20:09:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142866901] [2024-06-03 20:09:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:07,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142866901] [2024-06-03 20:09:07,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142866901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:07,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:07,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851512632] [2024-06-03 20:09:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:07,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:07,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 1572 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:07,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:07,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:07,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:07,814 INFO L124 PetriNetUnfolderBase]: 1671/2610 cut-off events. [2024-06-03 20:09:07,815 INFO L125 PetriNetUnfolderBase]: For 50889/50889 co-relation queries the response was YES. [2024-06-03 20:09:07,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16492 conditions, 2610 events. 1671/2610 cut-off events. For 50889/50889 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13299 event pairs, 349 based on Foata normal form. 4/2612 useless extension candidates. Maximal degree in co-relation 16426. Up to 2283 conditions per place. [2024-06-03 20:09:07,835 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 51 changer transitions 0/190 dead transitions. [2024-06-03 20:09:07,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2063 flow [2024-06-03 20:09:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:09:07,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:09:07,837 INFO L175 Difference]: Start difference. First operand has 137 places, 159 transitions, 1572 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:09:07,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2063 flow [2024-06-03 20:09:07,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 1975 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:07,881 INFO L231 Difference]: Finished difference. Result has 142 places, 162 transitions, 1663 flow [2024-06-03 20:09:07,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1663, PETRI_PLACES=142, PETRI_TRANSITIONS=162} [2024-06-03 20:09:07,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 20:09:07,881 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 162 transitions, 1663 flow [2024-06-03 20:09:07,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:07,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:07,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:09:07,882 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:07,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 608621941, now seen corresponding path program 1 times [2024-06-03 20:09:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:07,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070961210] [2024-06-03 20:09:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:08,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070961210] [2024-06-03 20:09:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070961210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:08,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:08,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618420434] [2024-06-03 20:09:08,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:08,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:09:08,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 162 transitions, 1663 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:08,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:08,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:09:08,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:09,429 INFO L124 PetriNetUnfolderBase]: 1682/2654 cut-off events. [2024-06-03 20:09:09,429 INFO L125 PetriNetUnfolderBase]: For 62989/63048 co-relation queries the response was YES. [2024-06-03 20:09:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17219 conditions, 2654 events. 1682/2654 cut-off events. For 62989/63048 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13888 event pairs, 433 based on Foata normal form. 17/2628 useless extension candidates. Maximal degree in co-relation 17151. Up to 2324 conditions per place. [2024-06-03 20:09:09,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 131 selfloop transitions, 32 changer transitions 0/199 dead transitions. [2024-06-03 20:09:09,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 2165 flow [2024-06-03 20:09:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 20:09:09,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:09:09,451 INFO L175 Difference]: Start difference. First operand has 142 places, 162 transitions, 1663 flow. Second operand 8 states and 168 transitions. [2024-06-03 20:09:09,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 2165 flow [2024-06-03 20:09:09,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 199 transitions, 2033 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:09,499 INFO L231 Difference]: Finished difference. Result has 145 places, 168 transitions, 1682 flow [2024-06-03 20:09:09,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1682, PETRI_PLACES=145, PETRI_TRANSITIONS=168} [2024-06-03 20:09:09,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 20:09:09,500 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 168 transitions, 1682 flow [2024-06-03 20:09:09,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:09,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:09,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:09,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:09:09,501 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)] === [2024-06-03 20:09:09,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash -286559059, now seen corresponding path program 2 times [2024-06-03 20:09:09,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:09,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267221264] [2024-06-03 20:09:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:10,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267221264] [2024-06-03 20:09:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267221264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:10,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691335388] [2024-06-03 20:09:10,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:10,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:10,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:09:10,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 168 transitions, 1682 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:10,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:10,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:09:10,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:11,179 INFO L124 PetriNetUnfolderBase]: 1739/2753 cut-off events. [2024-06-03 20:09:11,179 INFO L125 PetriNetUnfolderBase]: For 67722/67799 co-relation queries the response was YES. [2024-06-03 20:09:11,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17848 conditions, 2753 events. 1739/2753 cut-off events. For 67722/67799 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14508 event pairs, 374 based on Foata normal form. 20/2733 useless extension candidates. Maximal degree in co-relation 17778. Up to 2318 conditions per place. [2024-06-03 20:09:11,216 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 33 changer transitions 0/211 dead transitions. [2024-06-03 20:09:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 211 transitions, 2248 flow [2024-06-03 20:09:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 20:09:11,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:09:11,225 INFO L175 Difference]: Start difference. First operand has 145 places, 168 transitions, 1682 flow. Second operand 8 states and 176 transitions. [2024-06-03 20:09:11,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 211 transitions, 2248 flow [2024-06-03 20:09:11,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 211 transitions, 2171 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:11,278 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 1734 flow [2024-06-03 20:09:11,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1734, PETRI_PLACES=149, PETRI_TRANSITIONS=172} [2024-06-03 20:09:11,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-03 20:09:11,279 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 1734 flow [2024-06-03 20:09:11,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:11,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:11,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:09:11,280 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)] === [2024-06-03 20:09:11,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1509013365, now seen corresponding path program 3 times [2024-06-03 20:09:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244039678] [2024-06-03 20:09:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:12,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:12,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244039678] [2024-06-03 20:09:12,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244039678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:12,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:12,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:12,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682809990] [2024-06-03 20:09:12,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:12,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:12,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:12,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:09:12,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 1734 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:12,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:12,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:09:12,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:13,147 INFO L124 PetriNetUnfolderBase]: 1805/2848 cut-off events. [2024-06-03 20:09:13,147 INFO L125 PetriNetUnfolderBase]: For 75648/75709 co-relation queries the response was YES. [2024-06-03 20:09:13,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18920 conditions, 2848 events. 1805/2848 cut-off events. For 75648/75709 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15045 event pairs, 396 based on Foata normal form. 18/2819 useless extension candidates. Maximal degree in co-relation 18848. Up to 2505 conditions per place. [2024-06-03 20:09:13,179 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 34 changer transitions 0/216 dead transitions. [2024-06-03 20:09:13,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 216 transitions, 2323 flow [2024-06-03 20:09:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 20:09:13,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-03 20:09:13,182 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 1734 flow. Second operand 8 states and 171 transitions. [2024-06-03 20:09:13,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 216 transitions, 2323 flow [2024-06-03 20:09:13,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 216 transitions, 2239 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:13,255 INFO L231 Difference]: Finished difference. Result has 155 places, 183 transitions, 1889 flow [2024-06-03 20:09:13,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1889, PETRI_PLACES=155, PETRI_TRANSITIONS=183} [2024-06-03 20:09:13,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-03 20:09:13,256 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 183 transitions, 1889 flow [2024-06-03 20:09:13,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:13,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:13,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:09:13,256 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)] === [2024-06-03 20:09:13,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash -168226479, now seen corresponding path program 1 times [2024-06-03 20:09:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:13,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029578877] [2024-06-03 20:09:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:13,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:14,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:14,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029578877] [2024-06-03 20:09:14,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029578877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:14,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:14,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297878004] [2024-06-03 20:09:14,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:14,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:14,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:14,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 183 transitions, 1889 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:14,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:14,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:15,406 INFO L124 PetriNetUnfolderBase]: 1901/2981 cut-off events. [2024-06-03 20:09:15,406 INFO L125 PetriNetUnfolderBase]: For 72030/72030 co-relation queries the response was YES. [2024-06-03 20:09:15,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20047 conditions, 2981 events. 1901/2981 cut-off events. For 72030/72030 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15582 event pairs, 428 based on Foata normal form. 2/2982 useless extension candidates. Maximal degree in co-relation 19971. Up to 2770 conditions per place. [2024-06-03 20:09:15,430 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 33 changer transitions 0/221 dead transitions. [2024-06-03 20:09:15,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 221 transitions, 2477 flow [2024-06-03 20:09:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:09:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:09:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 20:09:15,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 20:09:15,432 INFO L175 Difference]: Start difference. First operand has 155 places, 183 transitions, 1889 flow. Second operand 10 states and 187 transitions. [2024-06-03 20:09:15,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 221 transitions, 2477 flow [2024-06-03 20:09:15,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 221 transitions, 2415 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 20:09:15,488 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 1981 flow [2024-06-03 20:09:15,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1981, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2024-06-03 20:09:15,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-03 20:09:15,489 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 1981 flow [2024-06-03 20:09:15,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:15,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:15,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:15,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:09:15,489 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)] === [2024-06-03 20:09:15,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1919423973, now seen corresponding path program 4 times [2024-06-03 20:09:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:15,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466772549] [2024-06-03 20:09:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:15,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:16,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:16,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466772549] [2024-06-03 20:09:16,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466772549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:16,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:16,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:16,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905057422] [2024-06-03 20:09:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:16,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:09:16,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 1981 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:16,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:16,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:09:16,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:17,193 INFO L124 PetriNetUnfolderBase]: 1860/2944 cut-off events. [2024-06-03 20:09:17,194 INFO L125 PetriNetUnfolderBase]: For 85592/85631 co-relation queries the response was YES. [2024-06-03 20:09:17,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20227 conditions, 2944 events. 1860/2944 cut-off events. For 85592/85631 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15721 event pairs, 439 based on Foata normal form. 18/2913 useless extension candidates. Maximal degree in co-relation 20149. Up to 2483 conditions per place. [2024-06-03 20:09:17,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-03 20:09:17,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 227 transitions, 2649 flow [2024-06-03 20:09:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 20:09:17,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-03 20:09:17,220 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 1981 flow. Second operand 8 states and 169 transitions. [2024-06-03 20:09:17,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 227 transitions, 2649 flow [2024-06-03 20:09:17,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 227 transitions, 2543 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:17,284 INFO L231 Difference]: Finished difference. Result has 165 places, 195 transitions, 2061 flow [2024-06-03 20:09:17,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2061, PETRI_PLACES=165, PETRI_TRANSITIONS=195} [2024-06-03 20:09:17,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-03 20:09:17,285 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 195 transitions, 2061 flow [2024-06-03 20:09:17,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:17,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:17,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:09:17,286 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)] === [2024-06-03 20:09:17,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1536552797, now seen corresponding path program 2 times [2024-06-03 20:09:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:17,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185847284] [2024-06-03 20:09:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:18,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:18,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185847284] [2024-06-03 20:09:18,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185847284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:18,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:18,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799959578] [2024-06-03 20:09:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:18,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:18,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:18,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 195 transitions, 2061 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:18,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:18,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:18,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:18,884 INFO L124 PetriNetUnfolderBase]: 1964/3077 cut-off events. [2024-06-03 20:09:18,884 INFO L125 PetriNetUnfolderBase]: For 83878/83878 co-relation queries the response was YES. [2024-06-03 20:09:18,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21419 conditions, 3077 events. 1964/3077 cut-off events. For 83878/83878 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16243 event pairs, 482 based on Foata normal form. 2/3075 useless extension candidates. Maximal degree in co-relation 21339. Up to 2762 conditions per place. [2024-06-03 20:09:18,910 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 54 changer transitions 0/230 dead transitions. [2024-06-03 20:09:18,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 230 transitions, 2807 flow [2024-06-03 20:09:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 20:09:18,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 20:09:18,912 INFO L175 Difference]: Start difference. First operand has 165 places, 195 transitions, 2061 flow. Second operand 9 states and 175 transitions. [2024-06-03 20:09:18,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 230 transitions, 2807 flow [2024-06-03 20:09:18,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2692 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:18,996 INFO L231 Difference]: Finished difference. Result has 169 places, 201 transitions, 2180 flow [2024-06-03 20:09:18,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2180, PETRI_PLACES=169, PETRI_TRANSITIONS=201} [2024-06-03 20:09:18,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:09:18,997 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 201 transitions, 2180 flow [2024-06-03 20:09:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:18,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:18,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:18,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:09:18,998 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)] === [2024-06-03 20:09:18,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1536315647, now seen corresponding path program 3 times [2024-06-03 20:09:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:18,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661529056] [2024-06-03 20:09:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:18,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661529056] [2024-06-03 20:09:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661529056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:20,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:20,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244905240] [2024-06-03 20:09:20,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:20,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:20,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:20,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:20,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 201 transitions, 2180 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:20,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:20,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:20,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:21,037 INFO L124 PetriNetUnfolderBase]: 1986/3113 cut-off events. [2024-06-03 20:09:21,038 INFO L125 PetriNetUnfolderBase]: For 89232/89232 co-relation queries the response was YES. [2024-06-03 20:09:21,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21833 conditions, 3113 events. 1986/3113 cut-off events. For 89232/89232 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16474 event pairs, 432 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 21752. Up to 2843 conditions per place. [2024-06-03 20:09:21,064 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 46 changer transitions 0/233 dead transitions. [2024-06-03 20:09:21,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 233 transitions, 2789 flow [2024-06-03 20:09:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:09:21,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:09:21,066 INFO L175 Difference]: Start difference. First operand has 169 places, 201 transitions, 2180 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:09:21,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 233 transitions, 2789 flow [2024-06-03 20:09:21,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 233 transitions, 2655 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:21,158 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 2239 flow [2024-06-03 20:09:21,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2239, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2024-06-03 20:09:21,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 20:09:21,159 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 2239 flow [2024-06-03 20:09:21,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:21,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:21,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:21,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:09:21,160 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:21,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1529886557, now seen corresponding path program 4 times [2024-06-03 20:09:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:21,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882193711] [2024-06-03 20:09:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:22,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882193711] [2024-06-03 20:09:22,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882193711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:22,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:22,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:22,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002958585] [2024-06-03 20:09:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:22,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:22,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 2239 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:22,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:22,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:22,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:23,098 INFO L124 PetriNetUnfolderBase]: 1981/3106 cut-off events. [2024-06-03 20:09:23,098 INFO L125 PetriNetUnfolderBase]: For 91294/91294 co-relation queries the response was YES. [2024-06-03 20:09:23,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21892 conditions, 3106 events. 1981/3106 cut-off events. For 91294/91294 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16422 event pairs, 440 based on Foata normal form. 2/3106 useless extension candidates. Maximal degree in co-relation 21809. Up to 2836 conditions per place. [2024-06-03 20:09:23,125 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-06-03 20:09:23,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 233 transitions, 2761 flow [2024-06-03 20:09:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:09:23,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:09:23,127 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 2239 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:09:23,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 233 transitions, 2761 flow [2024-06-03 20:09:23,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 233 transitions, 2603 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:23,208 INFO L231 Difference]: Finished difference. Result has 176 places, 207 transitions, 2183 flow [2024-06-03 20:09:23,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2183, PETRI_PLACES=176, PETRI_TRANSITIONS=207} [2024-06-03 20:09:23,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-03 20:09:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 207 transitions, 2183 flow [2024-06-03 20:09:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:23,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:09:23,210 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1287676391, now seen corresponding path program 5 times [2024-06-03 20:09:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273148183] [2024-06-03 20:09:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:24,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:24,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273148183] [2024-06-03 20:09:24,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273148183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:24,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:24,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824016729] [2024-06-03 20:09:24,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:24,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:24,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 207 transitions, 2183 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:24,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:24,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:24,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:25,115 INFO L124 PetriNetUnfolderBase]: 2008/3150 cut-off events. [2024-06-03 20:09:25,116 INFO L125 PetriNetUnfolderBase]: For 98121/98121 co-relation queries the response was YES. [2024-06-03 20:09:25,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22348 conditions, 3150 events. 2008/3150 cut-off events. For 98121/98121 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16710 event pairs, 432 based on Foata normal form. 2/3150 useless extension candidates. Maximal degree in co-relation 22264. Up to 2855 conditions per place. [2024-06-03 20:09:25,142 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 54 changer transitions 0/245 dead transitions. [2024-06-03 20:09:25,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 245 transitions, 2989 flow [2024-06-03 20:09:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:09:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:09:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 20:09:25,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:09:25,144 INFO L175 Difference]: Start difference. First operand has 176 places, 207 transitions, 2183 flow. Second operand 10 states and 189 transitions. [2024-06-03 20:09:25,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 245 transitions, 2989 flow [2024-06-03 20:09:25,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 245 transitions, 2847 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-03 20:09:25,232 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2287 flow [2024-06-03 20:09:25,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2287, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-03 20:09:25,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-03 20:09:25,233 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2287 flow [2024-06-03 20:09:25,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:25,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:25,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:25,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:09:25,233 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:25,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1287439241, now seen corresponding path program 6 times [2024-06-03 20:09:25,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:25,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426132675] [2024-06-03 20:09:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:25,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:26,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426132675] [2024-06-03 20:09:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426132675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:26,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:26,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978893782] [2024-06-03 20:09:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:26,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:26,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2287 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:26,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:26,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:26,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:27,234 INFO L124 PetriNetUnfolderBase]: 2003/3139 cut-off events. [2024-06-03 20:09:27,234 INFO L125 PetriNetUnfolderBase]: For 103868/103868 co-relation queries the response was YES. [2024-06-03 20:09:27,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22595 conditions, 3139 events. 2003/3139 cut-off events. For 103868/103868 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16584 event pairs, 482 based on Foata normal form. 2/3137 useless extension candidates. Maximal degree in co-relation 22513. Up to 2835 conditions per place. [2024-06-03 20:09:27,261 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 55 changer transitions 0/240 dead transitions. [2024-06-03 20:09:27,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 240 transitions, 2827 flow [2024-06-03 20:09:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:09:27,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:09:27,263 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2287 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:09:27,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 240 transitions, 2827 flow [2024-06-03 20:09:27,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 240 transitions, 2666 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:27,371 INFO L231 Difference]: Finished difference. Result has 179 places, 213 transitions, 2244 flow [2024-06-03 20:09:27,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2244, PETRI_PLACES=179, PETRI_TRANSITIONS=213} [2024-06-03 20:09:27,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-03 20:09:27,371 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 213 transitions, 2244 flow [2024-06-03 20:09:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:27,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:09:27,372 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:27,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1572776261, now seen corresponding path program 7 times [2024-06-03 20:09:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817665019] [2024-06-03 20:09:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817665019] [2024-06-03 20:09:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817665019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:28,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293127942] [2024-06-03 20:09:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:28,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:28,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 213 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:28,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:28,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:28,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:29,063 INFO L124 PetriNetUnfolderBase]: 1998/3132 cut-off events. [2024-06-03 20:09:29,063 INFO L125 PetriNetUnfolderBase]: For 107303/107303 co-relation queries the response was YES. [2024-06-03 20:09:29,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22610 conditions, 3132 events. 1998/3132 cut-off events. For 107303/107303 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16622 event pairs, 438 based on Foata normal form. 2/3130 useless extension candidates. Maximal degree in co-relation 22526. Up to 2706 conditions per place. [2024-06-03 20:09:29,091 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 149 selfloop transitions, 89 changer transitions 0/243 dead transitions. [2024-06-03 20:09:29,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 243 transitions, 2858 flow [2024-06-03 20:09:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:09:29,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:09:29,093 INFO L175 Difference]: Start difference. First operand has 179 places, 213 transitions, 2244 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:09:29,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 243 transitions, 2858 flow [2024-06-03 20:09:29,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 243 transitions, 2736 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:09:29,192 INFO L231 Difference]: Finished difference. Result has 180 places, 216 transitions, 2382 flow [2024-06-03 20:09:29,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2382, PETRI_PLACES=180, PETRI_TRANSITIONS=216} [2024-06-03 20:09:29,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 20:09:29,193 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 216 transitions, 2382 flow [2024-06-03 20:09:29,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:29,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:29,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:29,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:09:29,194 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:29,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1729161314, now seen corresponding path program 1 times [2024-06-03 20:09:29,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:29,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402595611] [2024-06-03 20:09:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:29,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402595611] [2024-06-03 20:09:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402595611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827308360] [2024-06-03 20:09:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:29,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:29,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:29,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 216 transitions, 2382 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) [2024-06-03 20:09:29,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:29,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:29,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:30,464 INFO L124 PetriNetUnfolderBase]: 2003/3147 cut-off events. [2024-06-03 20:09:30,465 INFO L125 PetriNetUnfolderBase]: For 113618/113618 co-relation queries the response was YES. [2024-06-03 20:09:30,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23232 conditions, 3147 events. 2003/3147 cut-off events. For 113618/113618 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16622 event pairs, 435 based on Foata normal form. 1/3147 useless extension candidates. Maximal degree in co-relation 23147. Up to 2985 conditions per place. [2024-06-03 20:09:30,498 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2024-06-03 20:09:30,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 238 transitions, 3056 flow [2024-06-03 20:09:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:09:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:09:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:09:30,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:09:30,504 INFO L175 Difference]: Start difference. First operand has 180 places, 216 transitions, 2382 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:09:30,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 238 transitions, 3056 flow [2024-06-03 20:09:30,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 238 transitions, 2820 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:30,637 INFO L231 Difference]: Finished difference. Result has 180 places, 222 transitions, 2302 flow [2024-06-03 20:09:30,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2302, PETRI_PLACES=180, PETRI_TRANSITIONS=222} [2024-06-03 20:09:30,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 20:09:30,637 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 222 transitions, 2302 flow [2024-06-03 20:09:30,638 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) [2024-06-03 20:09:30,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:30,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:30,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:09:30,638 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:30,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -63439840, now seen corresponding path program 2 times [2024-06-03 20:09:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932229350] [2024-06-03 20:09:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:31,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:31,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932229350] [2024-06-03 20:09:31,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932229350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:31,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:31,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:31,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294118677] [2024-06-03 20:09:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:31,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:31,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:31,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:31,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 222 transitions, 2302 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) [2024-06-03 20:09:31,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:31,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:31,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:32,002 INFO L124 PetriNetUnfolderBase]: 2013/3161 cut-off events. [2024-06-03 20:09:32,002 INFO L125 PetriNetUnfolderBase]: For 118810/118810 co-relation queries the response was YES. [2024-06-03 20:09:32,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23326 conditions, 3161 events. 2013/3161 cut-off events. For 118810/118810 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16744 event pairs, 470 based on Foata normal form. 1/3161 useless extension candidates. Maximal degree in co-relation 23240. Up to 3011 conditions per place. [2024-06-03 20:09:32,029 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 20 changer transitions 0/240 dead transitions. [2024-06-03 20:09:32,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 240 transitions, 2888 flow [2024-06-03 20:09:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:09:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:09:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:09:32,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-03 20:09:32,031 INFO L175 Difference]: Start difference. First operand has 180 places, 222 transitions, 2302 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:09:32,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 240 transitions, 2888 flow [2024-06-03 20:09:32,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 240 transitions, 2817 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 20:09:32,151 INFO L231 Difference]: Finished difference. Result has 184 places, 228 transitions, 2369 flow [2024-06-03 20:09:32,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2369, PETRI_PLACES=184, PETRI_TRANSITIONS=228} [2024-06-03 20:09:32,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 20:09:32,152 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 228 transitions, 2369 flow [2024-06-03 20:09:32,152 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) [2024-06-03 20:09:32,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:32,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:09:32,152 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:32,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1729281470, now seen corresponding path program 1 times [2024-06-03 20:09:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:32,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928404287] [2024-06-03 20:09:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:32,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:32,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928404287] [2024-06-03 20:09:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928404287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:32,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:32,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:32,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177209110] [2024-06-03 20:09:32,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:32,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:32,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 228 transitions, 2369 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) [2024-06-03 20:09:32,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:32,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:32,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:33,538 INFO L124 PetriNetUnfolderBase]: 2083/3275 cut-off events. [2024-06-03 20:09:33,539 INFO L125 PetriNetUnfolderBase]: For 127031/127031 co-relation queries the response was YES. [2024-06-03 20:09:33,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24035 conditions, 3275 events. 2083/3275 cut-off events. For 127031/127031 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17561 event pairs, 488 based on Foata normal form. 6/3278 useless extension candidates. Maximal degree in co-relation 23947. Up to 2898 conditions per place. [2024-06-03 20:09:33,568 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 57 changer transitions 0/264 dead transitions. [2024-06-03 20:09:33,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 264 transitions, 3216 flow [2024-06-03 20:09:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:09:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:09:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 20:09:33,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-03 20:09:33,576 INFO L175 Difference]: Start difference. First operand has 184 places, 228 transitions, 2369 flow. Second operand 7 states and 139 transitions. [2024-06-03 20:09:33,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 264 transitions, 3216 flow [2024-06-03 20:09:33,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 264 transitions, 3138 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:33,697 INFO L231 Difference]: Finished difference. Result has 188 places, 244 transitions, 2571 flow [2024-06-03 20:09:33,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2571, PETRI_PLACES=188, PETRI_TRANSITIONS=244} [2024-06-03 20:09:33,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 20:09:33,697 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 244 transitions, 2571 flow [2024-06-03 20:09:33,698 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) [2024-06-03 20:09:33,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:33,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:33,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:09:33,698 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:33,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash 555435158, now seen corresponding path program 2 times [2024-06-03 20:09:33,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:33,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276132626] [2024-06-03 20:09:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:34,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276132626] [2024-06-03 20:09:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276132626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:34,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662141812] [2024-06-03 20:09:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:34,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:34,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:34,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:34,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 244 transitions, 2571 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) [2024-06-03 20:09:34,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:34,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:34,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:34,982 INFO L124 PetriNetUnfolderBase]: 2113/3315 cut-off events. [2024-06-03 20:09:34,982 INFO L125 PetriNetUnfolderBase]: For 133210/133210 co-relation queries the response was YES. [2024-06-03 20:09:35,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24690 conditions, 3315 events. 2113/3315 cut-off events. For 133210/133210 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17782 event pairs, 494 based on Foata normal form. 6/3318 useless extension candidates. Maximal degree in co-relation 24600. Up to 3120 conditions per place. [2024-06-03 20:09:35,019 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 20 changer transitions 0/258 dead transitions. [2024-06-03 20:09:35,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 258 transitions, 3175 flow [2024-06-03 20:09:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-03 20:09:35,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-03 20:09:35,036 INFO L175 Difference]: Start difference. First operand has 188 places, 244 transitions, 2571 flow. Second operand 6 states and 113 transitions. [2024-06-03 20:09:35,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 258 transitions, 3175 flow [2024-06-03 20:09:35,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 258 transitions, 3092 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:09:35,198 INFO L231 Difference]: Finished difference. Result has 191 places, 248 transitions, 2587 flow [2024-06-03 20:09:35,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2587, PETRI_PLACES=191, PETRI_TRANSITIONS=248} [2024-06-03 20:09:35,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 20:09:35,199 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 248 transitions, 2587 flow [2024-06-03 20:09:35,199 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) [2024-06-03 20:09:35,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:35,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:35,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:09:35,200 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)] === [2024-06-03 20:09:35,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash 555197822, now seen corresponding path program 3 times [2024-06-03 20:09:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425833944] [2024-06-03 20:09:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425833944] [2024-06-03 20:09:35,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425833944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:35,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:35,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:35,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792614312] [2024-06-03 20:09:35,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:35,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:35,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 248 transitions, 2587 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) [2024-06-03 20:09:35,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:35,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:36,599 INFO L124 PetriNetUnfolderBase]: 2110/3315 cut-off events. [2024-06-03 20:09:36,600 INFO L125 PetriNetUnfolderBase]: For 135392/135392 co-relation queries the response was YES. [2024-06-03 20:09:36,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24622 conditions, 3315 events. 2110/3315 cut-off events. For 135392/135392 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17778 event pairs, 429 based on Foata normal form. 1/3315 useless extension candidates. Maximal degree in co-relation 24531. Up to 3141 conditions per place. [2024-06-03 20:09:36,637 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 20 changer transitions 0/262 dead transitions. [2024-06-03 20:09:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 262 transitions, 3137 flow [2024-06-03 20:09:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-03 20:09:36,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-03 20:09:36,639 INFO L175 Difference]: Start difference. First operand has 191 places, 248 transitions, 2587 flow. Second operand 6 states and 115 transitions. [2024-06-03 20:09:36,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 262 transitions, 3137 flow [2024-06-03 20:09:36,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 262 transitions, 3047 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:36,815 INFO L231 Difference]: Finished difference. Result has 193 places, 248 transitions, 2547 flow [2024-06-03 20:09:36,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2547, PETRI_PLACES=193, PETRI_TRANSITIONS=248} [2024-06-03 20:09:36,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-03 20:09:36,816 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 248 transitions, 2547 flow [2024-06-03 20:09:36,816 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) [2024-06-03 20:09:36,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:36,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:36,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:09:36,817 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)] === [2024-06-03 20:09:36,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash 563241578, now seen corresponding path program 3 times [2024-06-03 20:09:36,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:36,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504848768] [2024-06-03 20:09:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504848768] [2024-06-03 20:09:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504848768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179693938] [2024-06-03 20:09:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:37,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:37,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:37,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:37,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 248 transitions, 2547 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) [2024-06-03 20:09:37,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:37,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:37,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:38,047 INFO L124 PetriNetUnfolderBase]: 2071/3248 cut-off events. [2024-06-03 20:09:38,048 INFO L125 PetriNetUnfolderBase]: For 136911/136911 co-relation queries the response was YES. [2024-06-03 20:09:38,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24105 conditions, 3248 events. 2071/3248 cut-off events. For 136911/136911 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17289 event pairs, 475 based on Foata normal form. 6/3251 useless extension candidates. Maximal degree in co-relation 24014. Up to 2874 conditions per place. [2024-06-03 20:09:38,077 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 61 changer transitions 0/263 dead transitions. [2024-06-03 20:09:38,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 263 transitions, 3159 flow [2024-06-03 20:09:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 20:09:38,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:09:38,079 INFO L175 Difference]: Start difference. First operand has 193 places, 248 transitions, 2547 flow. Second operand 6 states and 120 transitions. [2024-06-03 20:09:38,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 263 transitions, 3159 flow [2024-06-03 20:09:38,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 263 transitions, 3105 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:38,238 INFO L231 Difference]: Finished difference. Result has 194 places, 248 transitions, 2635 flow [2024-06-03 20:09:38,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2635, PETRI_PLACES=194, PETRI_TRANSITIONS=248} [2024-06-03 20:09:38,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 20:09:38,239 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 248 transitions, 2635 flow [2024-06-03 20:09:38,239 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) [2024-06-03 20:09:38,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:38,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:38,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:09:38,240 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)] === [2024-06-03 20:09:38,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 555444086, now seen corresponding path program 1 times [2024-06-03 20:09:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:38,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672628087] [2024-06-03 20:09:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:39,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:39,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672628087] [2024-06-03 20:09:39,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672628087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:39,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:39,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065368675] [2024-06-03 20:09:39,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:39,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:39,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:39,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 248 transitions, 2635 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) [2024-06-03 20:09:39,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:39,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:39,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:39,863 INFO L124 PetriNetUnfolderBase]: 2110/3303 cut-off events. [2024-06-03 20:09:39,863 INFO L125 PetriNetUnfolderBase]: For 149271/149271 co-relation queries the response was YES. [2024-06-03 20:09:39,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24683 conditions, 3303 events. 2110/3303 cut-off events. For 149271/149271 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17644 event pairs, 447 based on Foata normal form. 14/3313 useless extension candidates. Maximal degree in co-relation 24591. Up to 3031 conditions per place. [2024-06-03 20:09:39,897 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 233 selfloop transitions, 28 changer transitions 0/266 dead transitions. [2024-06-03 20:09:39,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 266 transitions, 3303 flow [2024-06-03 20:09:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 20:09:39,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 20:09:39,898 INFO L175 Difference]: Start difference. First operand has 194 places, 248 transitions, 2635 flow. Second operand 6 states and 119 transitions. [2024-06-03 20:09:39,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 266 transitions, 3303 flow [2024-06-03 20:09:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 266 transitions, 3141 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:40,097 INFO L231 Difference]: Finished difference. Result has 195 places, 250 transitions, 2566 flow [2024-06-03 20:09:40,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2566, PETRI_PLACES=195, PETRI_TRANSITIONS=250} [2024-06-03 20:09:40,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-03 20:09:40,097 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 250 transitions, 2566 flow [2024-06-03 20:09:40,098 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) [2024-06-03 20:09:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:09:40,098 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:40,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash 666038722, now seen corresponding path program 1 times [2024-06-03 20:09:40,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544251114] [2024-06-03 20:09:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:41,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:41,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544251114] [2024-06-03 20:09:41,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544251114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:41,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942974191] [2024-06-03 20:09:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:41,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:41,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:41,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 250 transitions, 2566 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:41,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:41,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:41,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:41,971 INFO L124 PetriNetUnfolderBase]: 2144/3371 cut-off events. [2024-06-03 20:09:41,971 INFO L125 PetriNetUnfolderBase]: For 140637/140637 co-relation queries the response was YES. [2024-06-03 20:09:41,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24930 conditions, 3371 events. 2144/3371 cut-off events. For 140637/140637 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18146 event pairs, 424 based on Foata normal form. 4/3374 useless extension candidates. Maximal degree in co-relation 24837. Up to 3100 conditions per place. [2024-06-03 20:09:42,003 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 29 changer transitions 0/286 dead transitions. [2024-06-03 20:09:42,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 286 transitions, 3315 flow [2024-06-03 20:09:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:09:42,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:09:42,005 INFO L175 Difference]: Start difference. First operand has 195 places, 250 transitions, 2566 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:09:42,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 286 transitions, 3315 flow [2024-06-03 20:09:42,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 286 transitions, 3244 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:42,175 INFO L231 Difference]: Finished difference. Result has 201 places, 256 transitions, 2686 flow [2024-06-03 20:09:42,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2686, PETRI_PLACES=201, PETRI_TRANSITIONS=256} [2024-06-03 20:09:42,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-03 20:09:42,176 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 256 transitions, 2686 flow [2024-06-03 20:09:42,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:42,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:42,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:42,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:09:42,176 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:42,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -467098506, now seen corresponding path program 2 times [2024-06-03 20:09:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:42,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763111303] [2024-06-03 20:09:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:42,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:42,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763111303] [2024-06-03 20:09:42,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763111303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:42,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:42,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:42,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142365935] [2024-06-03 20:09:42,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:42,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:42,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:43,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:43,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 256 transitions, 2686 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:43,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:43,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:43,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:43,806 INFO L124 PetriNetUnfolderBase]: 2161/3398 cut-off events. [2024-06-03 20:09:43,807 INFO L125 PetriNetUnfolderBase]: For 147437/147437 co-relation queries the response was YES. [2024-06-03 20:09:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25420 conditions, 3398 events. 2161/3398 cut-off events. For 147437/147437 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18260 event pairs, 413 based on Foata normal form. 4/3401 useless extension candidates. Maximal degree in co-relation 25325. Up to 3145 conditions per place. [2024-06-03 20:09:43,840 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 19 changer transitions 0/296 dead transitions. [2024-06-03 20:09:43,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 296 transitions, 3486 flow [2024-06-03 20:09:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:09:43,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:09:43,841 INFO L175 Difference]: Start difference. First operand has 201 places, 256 transitions, 2686 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:09:43,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 296 transitions, 3486 flow [2024-06-03 20:09:44,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 296 transitions, 3365 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:44,061 INFO L231 Difference]: Finished difference. Result has 208 places, 262 transitions, 2754 flow [2024-06-03 20:09:44,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2754, PETRI_PLACES=208, PETRI_TRANSITIONS=262} [2024-06-03 20:09:44,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-03 20:09:44,063 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 262 transitions, 2754 flow [2024-06-03 20:09:44,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:44,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:44,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:09:44,068 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:44,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash -378532746, now seen corresponding path program 3 times [2024-06-03 20:09:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:44,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142442008] [2024-06-03 20:09:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142442008] [2024-06-03 20:09:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142442008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:45,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:45,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:45,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188691726] [2024-06-03 20:09:45,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:45,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:45,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:45,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 262 transitions, 2754 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:45,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:45,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:46,138 INFO L124 PetriNetUnfolderBase]: 2178/3425 cut-off events. [2024-06-03 20:09:46,138 INFO L125 PetriNetUnfolderBase]: For 154708/154708 co-relation queries the response was YES. [2024-06-03 20:09:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25789 conditions, 3425 events. 2178/3425 cut-off events. For 154708/154708 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18506 event pairs, 435 based on Foata normal form. 4/3428 useless extension candidates. Maximal degree in co-relation 25690. Up to 3171 conditions per place. [2024-06-03 20:09:46,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 24 changer transitions 0/301 dead transitions. [2024-06-03 20:09:46,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 301 transitions, 3561 flow [2024-06-03 20:09:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:09:46,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:09:46,176 INFO L175 Difference]: Start difference. First operand has 208 places, 262 transitions, 2754 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:09:46,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 301 transitions, 3561 flow [2024-06-03 20:09:46,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 301 transitions, 3429 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:46,373 INFO L231 Difference]: Finished difference. Result has 214 places, 268 transitions, 2820 flow [2024-06-03 20:09:46,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2820, PETRI_PLACES=214, PETRI_TRANSITIONS=268} [2024-06-03 20:09:46,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-03 20:09:46,374 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 268 transitions, 2820 flow [2024-06-03 20:09:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:46,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:46,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:09:46,375 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:46,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:46,375 INFO L85 PathProgramCache]: Analyzing trace with hash -52553742, now seen corresponding path program 1 times [2024-06-03 20:09:46,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:46,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267172574] [2024-06-03 20:09:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267172574] [2024-06-03 20:09:47,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267172574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:47,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:47,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:09:47,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922084660] [2024-06-03 20:09:47,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:09:47,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:47,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:09:47,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:09:47,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:47,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 268 transitions, 2820 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:47,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:47,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:48,585 INFO L124 PetriNetUnfolderBase]: 2363/3736 cut-off events. [2024-06-03 20:09:48,586 INFO L125 PetriNetUnfolderBase]: For 186366/186366 co-relation queries the response was YES. [2024-06-03 20:09:48,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28621 conditions, 3736 events. 2363/3736 cut-off events. For 186366/186366 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20878 event pairs, 454 based on Foata normal form. 12/3747 useless extension candidates. Maximal degree in co-relation 28519. Up to 3157 conditions per place. [2024-06-03 20:09:48,623 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 270 selfloop transitions, 37 changer transitions 0/312 dead transitions. [2024-06-03 20:09:48,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 312 transitions, 3849 flow [2024-06-03 20:09:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:09:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:09:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 20:09:48,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-03 20:09:48,625 INFO L175 Difference]: Start difference. First operand has 214 places, 268 transitions, 2820 flow. Second operand 10 states and 194 transitions. [2024-06-03 20:09:48,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 312 transitions, 3849 flow [2024-06-03 20:09:48,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 312 transitions, 3707 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:48,851 INFO L231 Difference]: Finished difference. Result has 221 places, 271 transitions, 2867 flow [2024-06-03 20:09:48,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2867, PETRI_PLACES=221, PETRI_TRANSITIONS=271} [2024-06-03 20:09:48,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-03 20:09:48,852 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 271 transitions, 2867 flow [2024-06-03 20:09:48,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:48,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:48,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:48,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:09:48,853 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)] === [2024-06-03 20:09:48,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:48,854 INFO L85 PathProgramCache]: Analyzing trace with hash -52820652, now seen corresponding path program 2 times [2024-06-03 20:09:48,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:48,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713762794] [2024-06-03 20:09:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:48,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713762794] [2024-06-03 20:09:49,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713762794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:49,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:49,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:09:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352946445] [2024-06-03 20:09:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:09:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:09:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:09:49,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:49,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 271 transitions, 2867 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:49,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:49,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:50,897 INFO L124 PetriNetUnfolderBase]: 2335/3692 cut-off events. [2024-06-03 20:09:50,898 INFO L125 PetriNetUnfolderBase]: For 183372/183372 co-relation queries the response was YES. [2024-06-03 20:09:50,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27755 conditions, 3692 events. 2335/3692 cut-off events. For 183372/183372 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20541 event pairs, 474 based on Foata normal form. 16/3707 useless extension candidates. Maximal degree in co-relation 27650. Up to 3319 conditions per place. [2024-06-03 20:09:50,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 43 changer transitions 0/308 dead transitions. [2024-06-03 20:09:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 308 transitions, 3607 flow [2024-06-03 20:09:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:09:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:09:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:09:50,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:09:50,942 INFO L175 Difference]: Start difference. First operand has 221 places, 271 transitions, 2867 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:09:50,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 308 transitions, 3607 flow [2024-06-03 20:09:51,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 308 transitions, 3527 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:51,200 INFO L231 Difference]: Finished difference. Result has 225 places, 271 transitions, 2880 flow [2024-06-03 20:09:51,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2880, PETRI_PLACES=225, PETRI_TRANSITIONS=271} [2024-06-03 20:09:51,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-03 20:09:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 271 transitions, 2880 flow [2024-06-03 20:09:51,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:51,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:09:51,203 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)] === [2024-06-03 20:09:51,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1255906302, now seen corresponding path program 4 times [2024-06-03 20:09:51,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:51,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444826636] [2024-06-03 20:09:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444826636] [2024-06-03 20:09:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444826636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:52,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699263228] [2024-06-03 20:09:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:52,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:52,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 271 transitions, 2880 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:52,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:52,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:52,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:53,061 INFO L124 PetriNetUnfolderBase]: 2352/3715 cut-off events. [2024-06-03 20:09:53,061 INFO L125 PetriNetUnfolderBase]: For 179151/179151 co-relation queries the response was YES. [2024-06-03 20:09:53,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28013 conditions, 3715 events. 2352/3715 cut-off events. For 179151/179151 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20697 event pairs, 480 based on Foata normal form. 4/3717 useless extension candidates. Maximal degree in co-relation 27906. Up to 3413 conditions per place. [2024-06-03 20:09:53,101 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-03 20:09:53,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 300 transitions, 3594 flow [2024-06-03 20:09:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:09:53,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:09:53,102 INFO L175 Difference]: Start difference. First operand has 225 places, 271 transitions, 2880 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:09:53,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 300 transitions, 3594 flow [2024-06-03 20:09:53,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 300 transitions, 3507 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:09:53,374 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 2954 flow [2024-06-03 20:09:53,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2954, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-03 20:09:53,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-03 20:09:53,375 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 2954 flow [2024-06-03 20:09:53,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:53,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:53,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:09:53,376 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)] === [2024-06-03 20:09:53,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1859586226, now seen corresponding path program 5 times [2024-06-03 20:09:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:53,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360500600] [2024-06-03 20:09:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360500600] [2024-06-03 20:09:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360500600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:54,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:54,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275055719] [2024-06-03 20:09:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:54,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:54,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:54,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 2954 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:54,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:54,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:54,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:55,292 INFO L124 PetriNetUnfolderBase]: 2369/3742 cut-off events. [2024-06-03 20:09:55,293 INFO L125 PetriNetUnfolderBase]: For 187258/187258 co-relation queries the response was YES. [2024-06-03 20:09:55,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28503 conditions, 3742 events. 2369/3742 cut-off events. For 187258/187258 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20910 event pairs, 480 based on Foata normal form. 4/3744 useless extension candidates. Maximal degree in co-relation 28395. Up to 3440 conditions per place. [2024-06-03 20:09:55,334 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 45 changer transitions 0/302 dead transitions. [2024-06-03 20:09:55,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 302 transitions, 3676 flow [2024-06-03 20:09:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:09:55,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:09:55,337 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 2954 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:09:55,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 302 transitions, 3676 flow [2024-06-03 20:09:55,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 302 transitions, 3533 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:55,631 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 2972 flow [2024-06-03 20:09:55,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2972, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-03 20:09:55,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-03 20:09:55,632 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 2972 flow [2024-06-03 20:09:55,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:55,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:55,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:55,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:09:55,633 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)] === [2024-06-03 20:09:55,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -627249726, now seen corresponding path program 6 times [2024-06-03 20:09:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:55,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497953300] [2024-06-03 20:09:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:55,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:56,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:56,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497953300] [2024-06-03 20:09:56,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497953300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:56,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:56,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:56,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488501118] [2024-06-03 20:09:56,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:56,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:56,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:56,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:56,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:56,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 2972 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:56,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:56,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:56,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:57,431 INFO L124 PetriNetUnfolderBase]: 2386/3779 cut-off events. [2024-06-03 20:09:57,431 INFO L125 PetriNetUnfolderBase]: For 194946/194946 co-relation queries the response was YES. [2024-06-03 20:09:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28878 conditions, 3779 events. 2386/3779 cut-off events. For 194946/194946 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21143 event pairs, 490 based on Foata normal form. 4/3781 useless extension candidates. Maximal degree in co-relation 28769. Up to 3467 conditions per place. [2024-06-03 20:09:57,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 253 selfloop transitions, 46 changer transitions 0/304 dead transitions. [2024-06-03 20:09:57,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 304 transitions, 3702 flow [2024-06-03 20:09:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:09:57,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:09:57,471 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 2972 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:09:57,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 304 transitions, 3702 flow [2024-06-03 20:09:57,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 304 transitions, 3559 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:57,781 INFO L231 Difference]: Finished difference. Result has 230 places, 277 transitions, 2996 flow [2024-06-03 20:09:57,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2996, PETRI_PLACES=230, PETRI_TRANSITIONS=277} [2024-06-03 20:09:57,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-03 20:09:57,782 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 277 transitions, 2996 flow [2024-06-03 20:09:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:57,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:57,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:57,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:09:57,783 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)] === [2024-06-03 20:09:57,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash -627397596, now seen corresponding path program 7 times [2024-06-03 20:09:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110034577] [2024-06-03 20:09:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:57,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110034577] [2024-06-03 20:09:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110034577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:58,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:58,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016759425] [2024-06-03 20:09:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:58,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:58,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:09:58,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 277 transitions, 2996 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:58,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:58,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:09:58,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:59,558 INFO L124 PetriNetUnfolderBase]: 2378/3767 cut-off events. [2024-06-03 20:09:59,558 INFO L125 PetriNetUnfolderBase]: For 198070/198070 co-relation queries the response was YES. [2024-06-03 20:09:59,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28718 conditions, 3767 events. 2378/3767 cut-off events. For 198070/198070 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21086 event pairs, 481 based on Foata normal form. 4/3769 useless extension candidates. Maximal degree in co-relation 28608. Up to 3378 conditions per place. [2024-06-03 20:09:59,605 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 53 changer transitions 0/309 dead transitions. [2024-06-03 20:09:59,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 309 transitions, 3796 flow [2024-06-03 20:09:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:09:59,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:09:59,607 INFO L175 Difference]: Start difference. First operand has 230 places, 277 transitions, 2996 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:09:59,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 309 transitions, 3796 flow [2024-06-03 20:09:59,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 309 transitions, 3647 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:59,911 INFO L231 Difference]: Finished difference. Result has 233 places, 281 transitions, 3100 flow [2024-06-03 20:09:59,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3100, PETRI_PLACES=233, PETRI_TRANSITIONS=281} [2024-06-03 20:09:59,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-03 20:09:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 281 transitions, 3100 flow [2024-06-03 20:09:59,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:59,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:59,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:59,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:09:59,912 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)] === [2024-06-03 20:09:59,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1080822874, now seen corresponding path program 3 times [2024-06-03 20:09:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:59,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825911351] [2024-06-03 20:09:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:59,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:01,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825911351] [2024-06-03 20:10:01,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825911351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:01,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:01,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76170024] [2024-06-03 20:10:01,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:01,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:01,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:01,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 281 transitions, 3100 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:01,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:01,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:01,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:02,222 INFO L124 PetriNetUnfolderBase]: 2505/3990 cut-off events. [2024-06-03 20:10:02,223 INFO L125 PetriNetUnfolderBase]: For 236665/236665 co-relation queries the response was YES. [2024-06-03 20:10:02,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31315 conditions, 3990 events. 2505/3990 cut-off events. For 236665/236665 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22871 event pairs, 514 based on Foata normal form. 12/4000 useless extension candidates. Maximal degree in co-relation 31203. Up to 3296 conditions per place. [2024-06-03 20:10:02,263 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 84 changer transitions 0/326 dead transitions. [2024-06-03 20:10:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 326 transitions, 4184 flow [2024-06-03 20:10:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 20:10:02,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-03 20:10:02,265 INFO L175 Difference]: Start difference. First operand has 233 places, 281 transitions, 3100 flow. Second operand 11 states and 214 transitions. [2024-06-03 20:10:02,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 326 transitions, 4184 flow [2024-06-03 20:10:02,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 326 transitions, 4027 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:02,631 INFO L231 Difference]: Finished difference. Result has 239 places, 283 transitions, 3211 flow [2024-06-03 20:10:02,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3211, PETRI_PLACES=239, PETRI_TRANSITIONS=283} [2024-06-03 20:10:02,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 20:10:02,631 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 283 transitions, 3211 flow [2024-06-03 20:10:02,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:02,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:02,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:02,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:10:02,632 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)] === [2024-06-03 20:10:02,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1263263904, now seen corresponding path program 4 times [2024-06-03 20:10:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679065484] [2024-06-03 20:10:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679065484] [2024-06-03 20:10:03,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679065484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:03,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:03,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595001761] [2024-06-03 20:10:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:03,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:03,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:03,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 283 transitions, 3211 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:03,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:03,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:03,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:05,065 INFO L124 PetriNetUnfolderBase]: 2563/4088 cut-off events. [2024-06-03 20:10:05,066 INFO L125 PetriNetUnfolderBase]: For 252605/252605 co-relation queries the response was YES. [2024-06-03 20:10:05,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32313 conditions, 4088 events. 2563/4088 cut-off events. For 252605/252605 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23573 event pairs, 539 based on Foata normal form. 16/4102 useless extension candidates. Maximal degree in co-relation 32199. Up to 3647 conditions per place. [2024-06-03 20:10:05,113 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 57 changer transitions 0/322 dead transitions. [2024-06-03 20:10:05,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 322 transitions, 4027 flow [2024-06-03 20:10:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-03 20:10:05,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-03 20:10:05,123 INFO L175 Difference]: Start difference. First operand has 239 places, 283 transitions, 3211 flow. Second operand 11 states and 207 transitions. [2024-06-03 20:10:05,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 322 transitions, 4027 flow [2024-06-03 20:10:05,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 322 transitions, 3877 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:05,543 INFO L231 Difference]: Finished difference. Result has 243 places, 284 transitions, 3235 flow [2024-06-03 20:10:05,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3235, PETRI_PLACES=243, PETRI_TRANSITIONS=284} [2024-06-03 20:10:05,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-03 20:10:05,544 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 284 transitions, 3235 flow [2024-06-03 20:10:05,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:05,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:05,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:10:05,545 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:05,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1255912254, now seen corresponding path program 5 times [2024-06-03 20:10:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:05,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797103378] [2024-06-03 20:10:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797103378] [2024-06-03 20:10:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797103378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:07,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:07,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:07,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057849729] [2024-06-03 20:10:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:07,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:07,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:07,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 284 transitions, 3235 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:07,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:07,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:07,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:08,152 INFO L124 PetriNetUnfolderBase]: 2621/4172 cut-off events. [2024-06-03 20:10:08,153 INFO L125 PetriNetUnfolderBase]: For 259432/259432 co-relation queries the response was YES. [2024-06-03 20:10:08,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32981 conditions, 4172 events. 2621/4172 cut-off events. For 259432/259432 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24200 event pairs, 550 based on Foata normal form. 16/4184 useless extension candidates. Maximal degree in co-relation 32865. Up to 3720 conditions per place. [2024-06-03 20:10:08,197 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 258 selfloop transitions, 57 changer transitions 0/320 dead transitions. [2024-06-03 20:10:08,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 320 transitions, 4033 flow [2024-06-03 20:10:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:10:08,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:10:08,199 INFO L175 Difference]: Start difference. First operand has 243 places, 284 transitions, 3235 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:10:08,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 320 transitions, 4033 flow [2024-06-03 20:10:08,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 320 transitions, 3913 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 20:10:08,560 INFO L231 Difference]: Finished difference. Result has 244 places, 285 transitions, 3280 flow [2024-06-03 20:10:08,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3280, PETRI_PLACES=244, PETRI_TRANSITIONS=285} [2024-06-03 20:10:08,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 20:10:08,561 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 285 transitions, 3280 flow [2024-06-03 20:10:08,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:08,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:08,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:10:08,561 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:08,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -427941984, now seen corresponding path program 6 times [2024-06-03 20:10:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434951110] [2024-06-03 20:10:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:09,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434951110] [2024-06-03 20:10:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434951110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:09,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:09,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360339754] [2024-06-03 20:10:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:09,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:09,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 285 transitions, 3280 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:09,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:09,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:09,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:11,070 INFO L124 PetriNetUnfolderBase]: 2679/4270 cut-off events. [2024-06-03 20:10:11,070 INFO L125 PetriNetUnfolderBase]: For 272293/272293 co-relation queries the response was YES. [2024-06-03 20:10:11,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33883 conditions, 4270 events. 2679/4270 cut-off events. For 272293/272293 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24995 event pairs, 560 based on Foata normal form. 16/4282 useless extension candidates. Maximal degree in co-relation 33766. Up to 3818 conditions per place. [2024-06-03 20:10:11,132 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 54 changer transitions 0/321 dead transitions. [2024-06-03 20:10:11,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 321 transitions, 4088 flow [2024-06-03 20:10:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 20:10:11,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-03 20:10:11,134 INFO L175 Difference]: Start difference. First operand has 244 places, 285 transitions, 3280 flow. Second operand 10 states and 192 transitions. [2024-06-03 20:10:11,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 321 transitions, 4088 flow [2024-06-03 20:10:11,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 321 transitions, 3967 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:11,679 INFO L231 Difference]: Finished difference. Result has 246 places, 286 transitions, 3326 flow [2024-06-03 20:10:11,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3326, PETRI_PLACES=246, PETRI_TRANSITIONS=286} [2024-06-03 20:10:11,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-03 20:10:11,680 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 3326 flow [2024-06-03 20:10:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:11,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:11,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:11,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:10:11,681 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)] === [2024-06-03 20:10:11,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash -420590334, now seen corresponding path program 7 times [2024-06-03 20:10:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:11,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812696624] [2024-06-03 20:10:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:12,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812696624] [2024-06-03 20:10:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812696624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:12,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:12,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095968837] [2024-06-03 20:10:12,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:13,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:13,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 286 transitions, 3326 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:13,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:13,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:13,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:14,138 INFO L124 PetriNetUnfolderBase]: 2737/4382 cut-off events. [2024-06-03 20:10:14,139 INFO L125 PetriNetUnfolderBase]: For 285375/285375 co-relation queries the response was YES. [2024-06-03 20:10:14,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34803 conditions, 4382 events. 2737/4382 cut-off events. For 285375/285375 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 25846 event pairs, 564 based on Foata normal form. 16/4396 useless extension candidates. Maximal degree in co-relation 34685. Up to 3932 conditions per place. [2024-06-03 20:10:14,194 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 58 changer transitions 0/325 dead transitions. [2024-06-03 20:10:14,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 325 transitions, 4150 flow [2024-06-03 20:10:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-03 20:10:14,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:10:14,196 INFO L175 Difference]: Start difference. First operand has 246 places, 286 transitions, 3326 flow. Second operand 11 states and 209 transitions. [2024-06-03 20:10:14,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 325 transitions, 4150 flow [2024-06-03 20:10:14,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 325 transitions, 4023 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:14,690 INFO L231 Difference]: Finished difference. Result has 249 places, 287 transitions, 3377 flow [2024-06-03 20:10:14,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3377, PETRI_PLACES=249, PETRI_TRANSITIONS=287} [2024-06-03 20:10:14,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-03 20:10:14,691 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 287 transitions, 3377 flow [2024-06-03 20:10:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:14,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:14,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:10:14,691 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)] === [2024-06-03 20:10:14,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -420323424, now seen corresponding path program 8 times [2024-06-03 20:10:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:14,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960557748] [2024-06-03 20:10:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:15,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:15,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960557748] [2024-06-03 20:10:15,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960557748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:15,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:15,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384358374] [2024-06-03 20:10:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:15,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:15,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 287 transitions, 3377 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:15,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:15,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:15,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:17,140 INFO L124 PetriNetUnfolderBase]: 2905/4672 cut-off events. [2024-06-03 20:10:17,140 INFO L125 PetriNetUnfolderBase]: For 317513/317513 co-relation queries the response was YES. [2024-06-03 20:10:17,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37808 conditions, 4672 events. 2905/4672 cut-off events. For 317513/317513 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28133 event pairs, 616 based on Foata normal form. 12/4680 useless extension candidates. Maximal degree in co-relation 37689. Up to 3894 conditions per place. [2024-06-03 20:10:17,188 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 65 changer transitions 0/330 dead transitions. [2024-06-03 20:10:17,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 330 transitions, 4521 flow [2024-06-03 20:10:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 20:10:17,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 20:10:17,197 INFO L175 Difference]: Start difference. First operand has 249 places, 287 transitions, 3377 flow. Second operand 10 states and 196 transitions. [2024-06-03 20:10:17,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 330 transitions, 4521 flow [2024-06-03 20:10:17,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 330 transitions, 4387 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 20:10:17,608 INFO L231 Difference]: Finished difference. Result has 251 places, 290 transitions, 3525 flow [2024-06-03 20:10:17,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3525, PETRI_PLACES=251, PETRI_TRANSITIONS=290} [2024-06-03 20:10:17,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-03 20:10:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 290 transitions, 3525 flow [2024-06-03 20:10:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:10:17,609 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)] === [2024-06-03 20:10:17,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -496007852, now seen corresponding path program 9 times [2024-06-03 20:10:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633728126] [2024-06-03 20:10:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:19,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633728126] [2024-06-03 20:10:19,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633728126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:19,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448770069] [2024-06-03 20:10:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:19,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:19,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 290 transitions, 3525 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:19,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:19,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:19,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:20,462 INFO L124 PetriNetUnfolderBase]: 2877/4632 cut-off events. [2024-06-03 20:10:20,463 INFO L125 PetriNetUnfolderBase]: For 310500/310500 co-relation queries the response was YES. [2024-06-03 20:10:20,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36848 conditions, 4632 events. 2877/4632 cut-off events. For 310500/310500 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27902 event pairs, 604 based on Foata normal form. 16/4646 useless extension candidates. Maximal degree in co-relation 36727. Up to 3994 conditions per place. [2024-06-03 20:10:20,517 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 241 selfloop transitions, 86 changer transitions 0/332 dead transitions. [2024-06-03 20:10:20,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 332 transitions, 4323 flow [2024-06-03 20:10:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:10:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:10:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-03 20:10:20,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-03 20:10:20,519 INFO L175 Difference]: Start difference. First operand has 251 places, 290 transitions, 3525 flow. Second operand 12 states and 226 transitions. [2024-06-03 20:10:20,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 332 transitions, 4323 flow [2024-06-03 20:10:21,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 332 transitions, 4187 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:21,119 INFO L231 Difference]: Finished difference. Result has 257 places, 290 transitions, 3574 flow [2024-06-03 20:10:21,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3574, PETRI_PLACES=257, PETRI_TRANSITIONS=290} [2024-06-03 20:10:21,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-03 20:10:21,120 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 290 transitions, 3574 flow [2024-06-03 20:10:21,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:21,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:21,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:21,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:10:21,120 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)] === [2024-06-03 20:10:21,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash -627243774, now seen corresponding path program 10 times [2024-06-03 20:10:21,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:21,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882524884] [2024-06-03 20:10:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:21,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882524884] [2024-06-03 20:10:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882524884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:22,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:22,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357878086] [2024-06-03 20:10:22,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:22,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:22,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 290 transitions, 3574 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:22,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:22,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:23,581 INFO L124 PetriNetUnfolderBase]: 2849/4588 cut-off events. [2024-06-03 20:10:23,581 INFO L125 PetriNetUnfolderBase]: For 290555/290555 co-relation queries the response was YES. [2024-06-03 20:10:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35688 conditions, 4588 events. 2849/4588 cut-off events. For 290555/290555 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27584 event pairs, 593 based on Foata normal form. 16/4602 useless extension candidates. Maximal degree in co-relation 35565. Up to 4173 conditions per place. [2024-06-03 20:10:23,633 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 48 changer transitions 0/324 dead transitions. [2024-06-03 20:10:23,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 324 transitions, 4336 flow [2024-06-03 20:10:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 20:10:23,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:10:23,634 INFO L175 Difference]: Start difference. First operand has 257 places, 290 transitions, 3574 flow. Second operand 10 states and 189 transitions. [2024-06-03 20:10:23,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 324 transitions, 4336 flow [2024-06-03 20:10:24,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 324 transitions, 4140 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-03 20:10:24,204 INFO L231 Difference]: Finished difference. Result has 256 places, 290 transitions, 3481 flow [2024-06-03 20:10:24,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3481, PETRI_PLACES=256, PETRI_TRANSITIONS=290} [2024-06-03 20:10:24,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-03 20:10:24,205 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 290 transitions, 3481 flow [2024-06-03 20:10:24,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:24,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:24,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:24,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:10:24,205 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)] === [2024-06-03 20:10:24,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:24,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1825391422, now seen corresponding path program 11 times [2024-06-03 20:10:24,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:24,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098638473] [2024-06-03 20:10:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:24,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098638473] [2024-06-03 20:10:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098638473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:25,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:25,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107268486] [2024-06-03 20:10:25,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:25,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:25,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:25,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:25,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 290 transitions, 3481 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:25,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:25,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:25,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:26,497 INFO L124 PetriNetUnfolderBase]: 2988/4829 cut-off events. [2024-06-03 20:10:26,497 INFO L125 PetriNetUnfolderBase]: For 291457/291457 co-relation queries the response was YES. [2024-06-03 20:10:26,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36613 conditions, 4829 events. 2988/4829 cut-off events. For 291457/291457 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29257 event pairs, 512 based on Foata normal form. 12/4837 useless extension candidates. Maximal degree in co-relation 36489. Up to 3151 conditions per place. [2024-06-03 20:10:26,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 221 selfloop transitions, 107 changer transitions 0/333 dead transitions. [2024-06-03 20:10:26,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 333 transitions, 4425 flow [2024-06-03 20:10:26,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 20:10:26,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-03 20:10:26,552 INFO L175 Difference]: Start difference. First operand has 256 places, 290 transitions, 3481 flow. Second operand 10 states and 194 transitions. [2024-06-03 20:10:26,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 333 transitions, 4425 flow [2024-06-03 20:10:27,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 333 transitions, 4326 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:27,023 INFO L231 Difference]: Finished difference. Result has 259 places, 294 transitions, 3778 flow [2024-06-03 20:10:27,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3778, PETRI_PLACES=259, PETRI_TRANSITIONS=294} [2024-06-03 20:10:27,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-03 20:10:27,024 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 294 transitions, 3778 flow [2024-06-03 20:10:27,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:27,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:27,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:27,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:10:27,024 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:27,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2064304328, now seen corresponding path program 1 times [2024-06-03 20:10:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:27,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241948378] [2024-06-03 20:10:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241948378] [2024-06-03 20:10:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241948378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:27,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418787134] [2024-06-03 20:10:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:27,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:27,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 294 transitions, 3778 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) [2024-06-03 20:10:27,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:27,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:27,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:28,937 INFO L124 PetriNetUnfolderBase]: 2993/4844 cut-off events. [2024-06-03 20:10:28,938 INFO L125 PetriNetUnfolderBase]: For 285643/285643 co-relation queries the response was YES. [2024-06-03 20:10:28,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37443 conditions, 4844 events. 2993/4844 cut-off events. For 285643/285643 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29609 event pairs, 635 based on Foata normal form. 1/4844 useless extension candidates. Maximal degree in co-relation 37317. Up to 4611 conditions per place. [2024-06-03 20:10:28,989 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 36 changer transitions 0/320 dead transitions. [2024-06-03 20:10:28,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 320 transitions, 4702 flow [2024-06-03 20:10:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:10:28,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:10:28,990 INFO L175 Difference]: Start difference. First operand has 259 places, 294 transitions, 3778 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:10:28,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 320 transitions, 4702 flow [2024-06-03 20:10:29,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 320 transitions, 4468 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:29,519 INFO L231 Difference]: Finished difference. Result has 260 places, 300 transitions, 3756 flow [2024-06-03 20:10:29,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3756, PETRI_PLACES=260, PETRI_TRANSITIONS=300} [2024-06-03 20:10:29,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-03 20:10:29,520 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 300 transitions, 3756 flow [2024-06-03 20:10:29,520 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) [2024-06-03 20:10:29,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:29,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:29,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:10:29,521 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:29,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1970352599, now seen corresponding path program 1 times [2024-06-03 20:10:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:29,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608452630] [2024-06-03 20:10:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:29,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:30,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608452630] [2024-06-03 20:10:30,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608452630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:30,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:30,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:30,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188822579] [2024-06-03 20:10:30,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:30,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:30,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:30,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:30,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 300 transitions, 3756 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) [2024-06-03 20:10:30,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:30,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:30,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:31,376 INFO L124 PetriNetUnfolderBase]: 3119/5023 cut-off events. [2024-06-03 20:10:31,377 INFO L125 PetriNetUnfolderBase]: For 321213/321213 co-relation queries the response was YES. [2024-06-03 20:10:31,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39593 conditions, 5023 events. 3119/5023 cut-off events. For 321213/321213 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30782 event pairs, 639 based on Foata normal form. 6/5027 useless extension candidates. Maximal degree in co-relation 39466. Up to 4310 conditions per place. [2024-06-03 20:10:31,432 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 247 selfloop transitions, 87 changer transitions 0/339 dead transitions. [2024-06-03 20:10:31,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 339 transitions, 5126 flow [2024-06-03 20:10:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 20:10:31,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-03 20:10:31,433 INFO L175 Difference]: Start difference. First operand has 260 places, 300 transitions, 3756 flow. Second operand 8 states and 162 transitions. [2024-06-03 20:10:31,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 339 transitions, 5126 flow [2024-06-03 20:10:31,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 339 transitions, 5023 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:31,942 INFO L231 Difference]: Finished difference. Result has 265 places, 311 transitions, 4097 flow [2024-06-03 20:10:31,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=265, PETRI_TRANSITIONS=311} [2024-06-03 20:10:31,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-03 20:10:31,943 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 311 transitions, 4097 flow [2024-06-03 20:10:31,943 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) [2024-06-03 20:10:31,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:31,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:31,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:10:31,943 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)] === [2024-06-03 20:10:31,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1970352754, now seen corresponding path program 2 times [2024-06-03 20:10:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:31,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047226178] [2024-06-03 20:10:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:32,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:32,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047226178] [2024-06-03 20:10:32,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047226178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:32,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:32,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:32,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228893444] [2024-06-03 20:10:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:32,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:32,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:32,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:32,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 311 transitions, 4097 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) [2024-06-03 20:10:32,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:32,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:32,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:33,901 INFO L124 PetriNetUnfolderBase]: 3124/5034 cut-off events. [2024-06-03 20:10:33,901 INFO L125 PetriNetUnfolderBase]: For 328236/328236 co-relation queries the response was YES. [2024-06-03 20:10:33,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40752 conditions, 5034 events. 3124/5034 cut-off events. For 328236/328236 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30876 event pairs, 650 based on Foata normal form. 1/5034 useless extension candidates. Maximal degree in co-relation 40622. Up to 4810 conditions per place. [2024-06-03 20:10:33,965 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 31 changer transitions 0/330 dead transitions. [2024-06-03 20:10:33,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 330 transitions, 4845 flow [2024-06-03 20:10:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:10:33,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 20:10:33,967 INFO L175 Difference]: Start difference. First operand has 265 places, 311 transitions, 4097 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:10:33,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 330 transitions, 4845 flow [2024-06-03 20:10:34,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 330 transitions, 4686 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-03 20:10:34,576 INFO L231 Difference]: Finished difference. Result has 270 places, 314 transitions, 4070 flow [2024-06-03 20:10:34,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4070, PETRI_PLACES=270, PETRI_TRANSITIONS=314} [2024-06-03 20:10:34,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-03 20:10:34,577 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 314 transitions, 4070 flow [2024-06-03 20:10:34,577 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) [2024-06-03 20:10:34,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:34,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:34,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:10:34,578 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)] === [2024-06-03 20:10:34,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1966627949, now seen corresponding path program 2 times [2024-06-03 20:10:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:34,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154651358] [2024-06-03 20:10:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:35,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154651358] [2024-06-03 20:10:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154651358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:35,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:35,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45510158] [2024-06-03 20:10:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:35,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:35,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 314 transitions, 4070 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) [2024-06-03 20:10:35,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:35,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:35,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:36,810 INFO L124 PetriNetUnfolderBase]: 3250/5216 cut-off events. [2024-06-03 20:10:36,812 INFO L125 PetriNetUnfolderBase]: For 366472/366472 co-relation queries the response was YES. [2024-06-03 20:10:36,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42896 conditions, 5216 events. 3250/5216 cut-off events. For 366472/366472 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 32186 event pairs, 655 based on Foata normal form. 6/5219 useless extension candidates. Maximal degree in co-relation 42764. Up to 4667 conditions per place. [2024-06-03 20:10:36,871 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 277 selfloop transitions, 74 changer transitions 0/356 dead transitions. [2024-06-03 20:10:36,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 356 transitions, 5510 flow [2024-06-03 20:10:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:10:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:10:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 20:10:36,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-03 20:10:36,873 INFO L175 Difference]: Start difference. First operand has 270 places, 314 transitions, 4070 flow. Second operand 10 states and 192 transitions. [2024-06-03 20:10:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 356 transitions, 5510 flow [2024-06-03 20:10:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 356 transitions, 5406 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:37,558 INFO L231 Difference]: Finished difference. Result has 275 places, 326 transitions, 4396 flow [2024-06-03 20:10:37,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4396, PETRI_PLACES=275, PETRI_TRANSITIONS=326} [2024-06-03 20:10:37,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 20:10:37,559 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 326 transitions, 4396 flow [2024-06-03 20:10:37,559 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) [2024-06-03 20:10:37,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:37,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:37,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:10:37,559 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)] === [2024-06-03 20:10:37,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1025127573, now seen corresponding path program 3 times [2024-06-03 20:10:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:37,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509307252] [2024-06-03 20:10:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509307252] [2024-06-03 20:10:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509307252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:38,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:38,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667485259] [2024-06-03 20:10:38,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:38,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:38,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:38,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:38,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:38,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 326 transitions, 4396 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) [2024-06-03 20:10:38,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:38,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:38,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:39,519 INFO L124 PetriNetUnfolderBase]: 3240/5200 cut-off events. [2024-06-03 20:10:39,519 INFO L125 PetriNetUnfolderBase]: For 369955/369955 co-relation queries the response was YES. [2024-06-03 20:10:39,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43059 conditions, 5200 events. 3240/5200 cut-off events. For 369955/369955 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31947 event pairs, 651 based on Foata normal form. 6/5204 useless extension candidates. Maximal degree in co-relation 42925. Up to 4664 conditions per place. [2024-06-03 20:10:39,584 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 67 changer transitions 0/350 dead transitions. [2024-06-03 20:10:39,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 350 transitions, 5400 flow [2024-06-03 20:10:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:10:39,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:10:39,586 INFO L175 Difference]: Start difference. First operand has 275 places, 326 transitions, 4396 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:10:39,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 350 transitions, 5400 flow [2024-06-03 20:10:40,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 350 transitions, 5139 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:40,432 INFO L231 Difference]: Finished difference. Result has 277 places, 326 transitions, 4277 flow [2024-06-03 20:10:40,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4277, PETRI_PLACES=277, PETRI_TRANSITIONS=326} [2024-06-03 20:10:40,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-03 20:10:40,433 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 326 transitions, 4277 flow [2024-06-03 20:10:40,433 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) [2024-06-03 20:10:40,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:40,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:40,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:10:40,434 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)] === [2024-06-03 20:10:40,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1966633684, now seen corresponding path program 3 times [2024-06-03 20:10:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:40,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560552262] [2024-06-03 20:10:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:40,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:41,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:41,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560552262] [2024-06-03 20:10:41,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560552262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:41,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:41,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:41,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027594178] [2024-06-03 20:10:41,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:41,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:41,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:41,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 326 transitions, 4277 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) [2024-06-03 20:10:41,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:41,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:41,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:42,458 INFO L124 PetriNetUnfolderBase]: 3245/5215 cut-off events. [2024-06-03 20:10:42,459 INFO L125 PetriNetUnfolderBase]: For 367346/367346 co-relation queries the response was YES. [2024-06-03 20:10:42,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42820 conditions, 5215 events. 3245/5215 cut-off events. For 367346/367346 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32115 event pairs, 670 based on Foata normal form. 1/5215 useless extension candidates. Maximal degree in co-relation 42685. Up to 4994 conditions per place. [2024-06-03 20:10:42,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 314 selfloop transitions, 23 changer transitions 0/342 dead transitions. [2024-06-03 20:10:42,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 342 transitions, 5047 flow [2024-06-03 20:10:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:10:42,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:10:42,532 INFO L175 Difference]: Start difference. First operand has 277 places, 326 transitions, 4277 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:10:42,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 342 transitions, 5047 flow [2024-06-03 20:10:43,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 342 transitions, 4907 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:43,425 INFO L231 Difference]: Finished difference. Result has 277 places, 329 transitions, 4259 flow [2024-06-03 20:10:43,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4259, PETRI_PLACES=277, PETRI_TRANSITIONS=329} [2024-06-03 20:10:43,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-03 20:10:43,427 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 329 transitions, 4259 flow [2024-06-03 20:10:43,427 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) [2024-06-03 20:10:43,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:43,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:43,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:10:43,428 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)] === [2024-06-03 20:10:43,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 38622039, now seen corresponding path program 4 times [2024-06-03 20:10:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114500834] [2024-06-03 20:10:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:44,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:44,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114500834] [2024-06-03 20:10:44,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114500834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:44,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:44,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125887006] [2024-06-03 20:10:44,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:44,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:44,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:44,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 329 transitions, 4259 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) [2024-06-03 20:10:44,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:44,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:44,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:45,219 INFO L124 PetriNetUnfolderBase]: 3275/5241 cut-off events. [2024-06-03 20:10:45,220 INFO L125 PetriNetUnfolderBase]: For 387761/387761 co-relation queries the response was YES. [2024-06-03 20:10:45,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43119 conditions, 5241 events. 3275/5241 cut-off events. For 387761/387761 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32163 event pairs, 668 based on Foata normal form. 6/5245 useless extension candidates. Maximal degree in co-relation 42983. Up to 4980 conditions per place. [2024-06-03 20:10:45,291 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 24 changer transitions 0/346 dead transitions. [2024-06-03 20:10:45,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 346 transitions, 5119 flow [2024-06-03 20:10:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:10:45,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:10:45,292 INFO L175 Difference]: Start difference. First operand has 277 places, 329 transitions, 4259 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:10:45,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 346 transitions, 5119 flow [2024-06-03 20:10:46,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 346 transitions, 5025 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:46,133 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 4316 flow [2024-06-03 20:10:46,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4316, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-03 20:10:46,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-03 20:10:46,144 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 4316 flow [2024-06-03 20:10:46,144 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) [2024-06-03 20:10:46,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:46,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:46,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:10:46,145 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)] === [2024-06-03 20:10:46,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 38889166, now seen corresponding path program 1 times [2024-06-03 20:10:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701003077] [2024-06-03 20:10:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:47,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701003077] [2024-06-03 20:10:47,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701003077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:47,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:47,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:47,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606921742] [2024-06-03 20:10:47,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:47,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:47,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 4316 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) [2024-06-03 20:10:47,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:47,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:48,228 INFO L124 PetriNetUnfolderBase]: 3287/5272 cut-off events. [2024-06-03 20:10:48,228 INFO L125 PetriNetUnfolderBase]: For 394396/394396 co-relation queries the response was YES. [2024-06-03 20:10:48,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43507 conditions, 5272 events. 3287/5272 cut-off events. For 394396/394396 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32549 event pairs, 686 based on Foata normal form. 4/5272 useless extension candidates. Maximal degree in co-relation 43370. Up to 4960 conditions per place. [2024-06-03 20:10:48,297 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 310 selfloop transitions, 34 changer transitions 0/349 dead transitions. [2024-06-03 20:10:48,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 349 transitions, 5168 flow [2024-06-03 20:10:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:10:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:10:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 20:10:48,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:10:48,306 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 4316 flow. Second operand 6 states and 117 transitions. [2024-06-03 20:10:48,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 349 transitions, 5168 flow [2024-06-03 20:10:49,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 349 transitions, 5053 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:49,100 INFO L231 Difference]: Finished difference. Result has 279 places, 337 transitions, 4374 flow [2024-06-03 20:10:49,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4374, PETRI_PLACES=279, PETRI_TRANSITIONS=337} [2024-06-03 20:10:49,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-03 20:10:49,100 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 337 transitions, 4374 flow [2024-06-03 20:10:49,100 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) [2024-06-03 20:10:49,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:49,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:10:49,101 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)] === [2024-06-03 20:10:49,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:49,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1641451281, now seen corresponding path program 5 times [2024-06-03 20:10:49,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156846409] [2024-06-03 20:10:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156846409] [2024-06-03 20:10:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156846409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:49,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:49,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266194154] [2024-06-03 20:10:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:49,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:49,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 337 transitions, 4374 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) [2024-06-03 20:10:49,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:49,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:49,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:50,991 INFO L124 PetriNetUnfolderBase]: 3349/5370 cut-off events. [2024-06-03 20:10:50,992 INFO L125 PetriNetUnfolderBase]: For 420204/420204 co-relation queries the response was YES. [2024-06-03 20:10:51,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45136 conditions, 5370 events. 3349/5370 cut-off events. For 420204/420204 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33200 event pairs, 688 based on Foata normal form. 6/5374 useless extension candidates. Maximal degree in co-relation 44998. Up to 4749 conditions per place. [2024-06-03 20:10:51,059 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 286 selfloop transitions, 77 changer transitions 0/368 dead transitions. [2024-06-03 20:10:51,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 368 transitions, 5748 flow [2024-06-03 20:10:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 20:10:51,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-03 20:10:51,060 INFO L175 Difference]: Start difference. First operand has 279 places, 337 transitions, 4374 flow. Second operand 7 states and 141 transitions. [2024-06-03 20:10:51,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 368 transitions, 5748 flow [2024-06-03 20:10:51,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 368 transitions, 5618 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:51,840 INFO L231 Difference]: Finished difference. Result has 282 places, 346 transitions, 4701 flow [2024-06-03 20:10:51,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4701, PETRI_PLACES=282, PETRI_TRANSITIONS=346} [2024-06-03 20:10:51,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-03 20:10:51,840 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 346 transitions, 4701 flow [2024-06-03 20:10:51,841 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) [2024-06-03 20:10:51,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:51,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:51,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:10:51,841 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)] === [2024-06-03 20:10:51,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1641457016, now seen corresponding path program 4 times [2024-06-03 20:10:51,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:51,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013741486] [2024-06-03 20:10:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:51,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:52,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013741486] [2024-06-03 20:10:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013741486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:52,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:52,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:52,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580038425] [2024-06-03 20:10:52,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:52,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:52,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 346 transitions, 4701 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) [2024-06-03 20:10:52,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:52,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:52,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:53,762 INFO L124 PetriNetUnfolderBase]: 3346/5360 cut-off events. [2024-06-03 20:10:53,762 INFO L125 PetriNetUnfolderBase]: For 410526/410526 co-relation queries the response was YES. [2024-06-03 20:10:53,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45441 conditions, 5360 events. 3346/5360 cut-off events. For 410526/410526 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33108 event pairs, 682 based on Foata normal form. 1/5360 useless extension candidates. Maximal degree in co-relation 45302. Up to 5120 conditions per place. [2024-06-03 20:10:53,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 26 changer transitions 0/364 dead transitions. [2024-06-03 20:10:53,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 364 transitions, 5465 flow [2024-06-03 20:10:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 20:10:53,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:10:53,837 INFO L175 Difference]: Start difference. First operand has 282 places, 346 transitions, 4701 flow. Second operand 7 states and 133 transitions. [2024-06-03 20:10:53,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 364 transitions, 5465 flow [2024-06-03 20:10:54,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 364 transitions, 5268 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:54,668 INFO L231 Difference]: Finished difference. Result has 285 places, 346 transitions, 4566 flow [2024-06-03 20:10:54,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4566, PETRI_PLACES=285, PETRI_TRANSITIONS=346} [2024-06-03 20:10:54,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-03 20:10:54,669 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 346 transitions, 4566 flow [2024-06-03 20:10:54,669 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) [2024-06-03 20:10:54,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:54,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:10:54,669 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)] === [2024-06-03 20:10:54,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1641456861, now seen corresponding path program 6 times [2024-06-03 20:10:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323081398] [2024-06-03 20:10:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323081398] [2024-06-03 20:10:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323081398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:55,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:55,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701733876] [2024-06-03 20:10:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:55,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:55,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:55,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 346 transitions, 4566 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) [2024-06-03 20:10:55,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:55,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:55,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:56,517 INFO L124 PetriNetUnfolderBase]: 3336/5350 cut-off events. [2024-06-03 20:10:56,517 INFO L125 PetriNetUnfolderBase]: For 414424/414424 co-relation queries the response was YES. [2024-06-03 20:10:56,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44709 conditions, 5350 events. 3336/5350 cut-off events. For 414424/414424 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 33016 event pairs, 669 based on Foata normal form. 6/5354 useless extension candidates. Maximal degree in co-relation 44570. Up to 4742 conditions per place. [2024-06-03 20:10:56,585 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 284 selfloop transitions, 81 changer transitions 0/370 dead transitions. [2024-06-03 20:10:56,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 370 transitions, 5592 flow [2024-06-03 20:10:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 20:10:56,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-03 20:10:56,586 INFO L175 Difference]: Start difference. First operand has 285 places, 346 transitions, 4566 flow. Second operand 7 states and 143 transitions. [2024-06-03 20:10:56,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 370 transitions, 5592 flow [2024-06-03 20:10:57,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 370 transitions, 5464 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:57,545 INFO L231 Difference]: Finished difference. Result has 286 places, 346 transitions, 4608 flow [2024-06-03 20:10:57,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4608, PETRI_PLACES=286, PETRI_TRANSITIONS=346} [2024-06-03 20:10:57,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 20:10:57,546 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 346 transitions, 4608 flow [2024-06-03 20:10:57,546 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) [2024-06-03 20:10:57,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:57,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:57,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:10:57,546 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:57,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1242990556, now seen corresponding path program 1 times [2024-06-03 20:10:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671881721] [2024-06-03 20:10:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:58,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671881721] [2024-06-03 20:10:58,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671881721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:58,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:58,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482106996] [2024-06-03 20:10:58,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:58,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:58,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:58,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:10:58,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 346 transitions, 4608 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:58,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:58,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:10:58,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:00,267 INFO L124 PetriNetUnfolderBase]: 3377/5419 cut-off events. [2024-06-03 20:11:00,268 INFO L125 PetriNetUnfolderBase]: For 436188/436188 co-relation queries the response was YES. [2024-06-03 20:11:00,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45507 conditions, 5419 events. 3377/5419 cut-off events. For 436188/436188 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33614 event pairs, 662 based on Foata normal form. 12/5430 useless extension candidates. Maximal degree in co-relation 45367. Up to 5025 conditions per place. [2024-06-03 20:11:00,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 30 changer transitions 0/384 dead transitions. [2024-06-03 20:11:00,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 384 transitions, 5532 flow [2024-06-03 20:11:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:11:00,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:11:00,353 INFO L175 Difference]: Start difference. First operand has 286 places, 346 transitions, 4608 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:11:00,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 384 transitions, 5532 flow [2024-06-03 20:11:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 384 transitions, 5346 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:01,302 INFO L231 Difference]: Finished difference. Result has 291 places, 347 transitions, 4546 flow [2024-06-03 20:11:01,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4422, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4546, PETRI_PLACES=291, PETRI_TRANSITIONS=347} [2024-06-03 20:11:01,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-03 20:11:01,303 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 347 transitions, 4546 flow [2024-06-03 20:11:01,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:01,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:01,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:01,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:11:01,304 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:01,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1595150382, now seen corresponding path program 2 times [2024-06-03 20:11:01,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:01,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568303276] [2024-06-03 20:11:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:01,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:02,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:02,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568303276] [2024-06-03 20:11:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568303276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:02,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:02,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153382824] [2024-06-03 20:11:02,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:02,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:02,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 347 transitions, 4546 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:02,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:03,858 INFO L124 PetriNetUnfolderBase]: 3418/5504 cut-off events. [2024-06-03 20:11:03,859 INFO L125 PetriNetUnfolderBase]: For 450338/450338 co-relation queries the response was YES. [2024-06-03 20:11:03,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45951 conditions, 5504 events. 3418/5504 cut-off events. For 450338/450338 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34250 event pairs, 671 based on Foata normal form. 12/5515 useless extension candidates. Maximal degree in co-relation 45810. Up to 5114 conditions per place. [2024-06-03 20:11:03,933 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 20 changer transitions 0/389 dead transitions. [2024-06-03 20:11:03,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 389 transitions, 5494 flow [2024-06-03 20:11:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:11:03,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:11:03,934 INFO L175 Difference]: Start difference. First operand has 291 places, 347 transitions, 4546 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:11:03,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 389 transitions, 5494 flow [2024-06-03 20:11:04,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 389 transitions, 5396 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:04,960 INFO L231 Difference]: Finished difference. Result has 293 places, 348 transitions, 4554 flow [2024-06-03 20:11:04,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4554, PETRI_PLACES=293, PETRI_TRANSITIONS=348} [2024-06-03 20:11:04,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-03 20:11:04,963 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 348 transitions, 4554 flow [2024-06-03 20:11:04,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:04,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:04,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:04,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:11:04,963 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:04,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1150388178, now seen corresponding path program 3 times [2024-06-03 20:11:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:04,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606766264] [2024-06-03 20:11:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:06,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606766264] [2024-06-03 20:11:06,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606766264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:06,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:06,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:06,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309524531] [2024-06-03 20:11:06,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:06,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:06,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:06,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:06,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 348 transitions, 4554 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:06,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:06,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:06,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:07,762 INFO L124 PetriNetUnfolderBase]: 3459/5575 cut-off events. [2024-06-03 20:11:07,763 INFO L125 PetriNetUnfolderBase]: For 462755/462755 co-relation queries the response was YES. [2024-06-03 20:11:07,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46463 conditions, 5575 events. 3459/5575 cut-off events. For 462755/462755 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34848 event pairs, 700 based on Foata normal form. 12/5586 useless extension candidates. Maximal degree in co-relation 46321. Up to 5184 conditions per place. [2024-06-03 20:11:07,838 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 25 changer transitions 0/389 dead transitions. [2024-06-03 20:11:07,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 389 transitions, 5502 flow [2024-06-03 20:11:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:11:07,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:11:07,840 INFO L175 Difference]: Start difference. First operand has 293 places, 348 transitions, 4554 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:11:07,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 389 transitions, 5502 flow [2024-06-03 20:11:08,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 389 transitions, 5422 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:08,886 INFO L231 Difference]: Finished difference. Result has 295 places, 349 transitions, 4592 flow [2024-06-03 20:11:08,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4592, PETRI_PLACES=295, PETRI_TRANSITIONS=349} [2024-06-03 20:11:08,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:11:08,887 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 349 transitions, 4592 flow [2024-06-03 20:11:08,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:08,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:08,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:08,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:11:08,887 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)] === [2024-06-03 20:11:08,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash 569828157, now seen corresponding path program 1 times [2024-06-03 20:11:08,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:08,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122636748] [2024-06-03 20:11:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:08,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122636748] [2024-06-03 20:11:09,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122636748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:09,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:09,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:09,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687733604] [2024-06-03 20:11:09,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:09,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:09,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:09,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:09,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 349 transitions, 4592 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) [2024-06-03 20:11:09,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:09,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:09,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:11,001 INFO L124 PetriNetUnfolderBase]: 3533/5679 cut-off events. [2024-06-03 20:11:11,001 INFO L125 PetriNetUnfolderBase]: For 476240/476240 co-relation queries the response was YES. [2024-06-03 20:11:11,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48211 conditions, 5679 events. 3533/5679 cut-off events. For 476240/476240 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35550 event pairs, 727 based on Foata normal form. 2/5680 useless extension candidates. Maximal degree in co-relation 48068. Up to 5297 conditions per place. [2024-06-03 20:11:11,065 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 329 selfloop transitions, 51 changer transitions 0/385 dead transitions. [2024-06-03 20:11:11,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 385 transitions, 5875 flow [2024-06-03 20:11:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 20:11:11,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-03 20:11:11,067 INFO L175 Difference]: Start difference. First operand has 295 places, 349 transitions, 4592 flow. Second operand 8 states and 161 transitions. [2024-06-03 20:11:11,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 385 transitions, 5875 flow [2024-06-03 20:11:12,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 385 transitions, 5783 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:12,103 INFO L231 Difference]: Finished difference. Result has 296 places, 359 transitions, 4908 flow [2024-06-03 20:11:12,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4500, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4908, PETRI_PLACES=296, PETRI_TRANSITIONS=359} [2024-06-03 20:11:12,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 20:11:12,104 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 359 transitions, 4908 flow [2024-06-03 20:11:12,104 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) [2024-06-03 20:11:12,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:12,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:12,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:11:12,105 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)] === [2024-06-03 20:11:12,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash 569948127, now seen corresponding path program 2 times [2024-06-03 20:11:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747885868] [2024-06-03 20:11:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:12,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747885868] [2024-06-03 20:11:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747885868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248364725] [2024-06-03 20:11:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:12,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:12,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 359 transitions, 4908 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) [2024-06-03 20:11:12,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:12,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:12,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:14,232 INFO L124 PetriNetUnfolderBase]: 3527/5669 cut-off events. [2024-06-03 20:11:14,233 INFO L125 PetriNetUnfolderBase]: For 479707/479707 co-relation queries the response was YES. [2024-06-03 20:11:14,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48151 conditions, 5669 events. 3527/5669 cut-off events. For 479707/479707 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35502 event pairs, 729 based on Foata normal form. 2/5670 useless extension candidates. Maximal degree in co-relation 48006. Up to 5368 conditions per place. [2024-06-03 20:11:14,310 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 337 selfloop transitions, 38 changer transitions 0/380 dead transitions. [2024-06-03 20:11:14,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 380 transitions, 5749 flow [2024-06-03 20:11:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 20:11:14,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 20:11:14,311 INFO L175 Difference]: Start difference. First operand has 296 places, 359 transitions, 4908 flow. Second operand 8 states and 154 transitions. [2024-06-03 20:11:14,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 380 transitions, 5749 flow [2024-06-03 20:11:15,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 380 transitions, 5606 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:15,379 INFO L231 Difference]: Finished difference. Result has 299 places, 359 transitions, 4848 flow [2024-06-03 20:11:15,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4848, PETRI_PLACES=299, PETRI_TRANSITIONS=359} [2024-06-03 20:11:15,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 20:11:15,380 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 359 transitions, 4848 flow [2024-06-03 20:11:15,380 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) [2024-06-03 20:11:15,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:15,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:15,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:11:15,381 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)] === [2024-06-03 20:11:15,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash 747079647, now seen corresponding path program 3 times [2024-06-03 20:11:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644230536] [2024-06-03 20:11:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644230536] [2024-06-03 20:11:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644230536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:16,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147463201] [2024-06-03 20:11:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:16,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:16,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 359 transitions, 4848 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) [2024-06-03 20:11:16,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:16,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:16,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:17,352 INFO L124 PetriNetUnfolderBase]: 3552/5702 cut-off events. [2024-06-03 20:11:17,352 INFO L125 PetriNetUnfolderBase]: For 490166/490166 co-relation queries the response was YES. [2024-06-03 20:11:17,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48500 conditions, 5702 events. 3552/5702 cut-off events. For 490166/490166 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 35675 event pairs, 729 based on Foata normal form. 2/5703 useless extension candidates. Maximal degree in co-relation 48354. Up to 5440 conditions per place. [2024-06-03 20:11:17,431 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 30 changer transitions 0/387 dead transitions. [2024-06-03 20:11:17,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 387 transitions, 5897 flow [2024-06-03 20:11:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:11:17,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 20:11:17,432 INFO L175 Difference]: Start difference. First operand has 299 places, 359 transitions, 4848 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:11:17,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 387 transitions, 5897 flow [2024-06-03 20:11:18,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 387 transitions, 5787 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:18,664 INFO L231 Difference]: Finished difference. Result has 304 places, 370 transitions, 5041 flow [2024-06-03 20:11:18,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5041, PETRI_PLACES=304, PETRI_TRANSITIONS=370} [2024-06-03 20:11:18,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:11:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 370 transitions, 5041 flow [2024-06-03 20:11:18,664 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) [2024-06-03 20:11:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:18,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:18,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:11:18,665 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -70788620, now seen corresponding path program 4 times [2024-06-03 20:11:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:18,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400294095] [2024-06-03 20:11:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:19,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:19,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400294095] [2024-06-03 20:11:19,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400294095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:19,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:19,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:19,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081913764] [2024-06-03 20:11:19,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:19,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:19,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:19,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 370 transitions, 5041 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:19,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:19,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:19,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:21,236 INFO L124 PetriNetUnfolderBase]: 3593/5779 cut-off events. [2024-06-03 20:11:21,236 INFO L125 PetriNetUnfolderBase]: For 525085/525085 co-relation queries the response was YES. [2024-06-03 20:11:21,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49219 conditions, 5779 events. 3593/5779 cut-off events. For 525085/525085 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36306 event pairs, 738 based on Foata normal form. 12/5789 useless extension candidates. Maximal degree in co-relation 49071. Up to 5332 conditions per place. [2024-06-03 20:11:21,314 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 47 changer transitions 0/405 dead transitions. [2024-06-03 20:11:21,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 405 transitions, 6005 flow [2024-06-03 20:11:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:11:21,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:11:21,316 INFO L175 Difference]: Start difference. First operand has 304 places, 370 transitions, 5041 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:11:21,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 405 transitions, 6005 flow [2024-06-03 20:11:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 405 transitions, 5884 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:22,618 INFO L231 Difference]: Finished difference. Result has 310 places, 371 transitions, 5084 flow [2024-06-03 20:11:22,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4920, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5084, PETRI_PLACES=310, PETRI_TRANSITIONS=371} [2024-06-03 20:11:22,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-03 20:11:22,619 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 371 transitions, 5084 flow [2024-06-03 20:11:22,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:22,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:22,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:22,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:11:22,619 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:22,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -75372590, now seen corresponding path program 5 times [2024-06-03 20:11:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585100578] [2024-06-03 20:11:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:24,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585100578] [2024-06-03 20:11:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585100578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:24,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:24,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265014163] [2024-06-03 20:11:24,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:24,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:24,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:24,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:24,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 371 transitions, 5084 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:24,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:24,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:24,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:25,710 INFO L124 PetriNetUnfolderBase]: 3573/5747 cut-off events. [2024-06-03 20:11:25,710 INFO L125 PetriNetUnfolderBase]: For 512617/512617 co-relation queries the response was YES. [2024-06-03 20:11:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48338 conditions, 5747 events. 3573/5747 cut-off events. For 512617/512617 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36150 event pairs, 704 based on Foata normal form. 12/5757 useless extension candidates. Maximal degree in co-relation 48189. Up to 5223 conditions per place. [2024-06-03 20:11:25,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 54 changer transitions 0/405 dead transitions. [2024-06-03 20:11:25,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 405 transitions, 5876 flow [2024-06-03 20:11:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:11:25,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:11:25,797 INFO L175 Difference]: Start difference. First operand has 310 places, 371 transitions, 5084 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:11:25,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 405 transitions, 5876 flow [2024-06-03 20:11:27,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 405 transitions, 5738 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:27,021 INFO L231 Difference]: Finished difference. Result has 311 places, 370 transitions, 4946 flow [2024-06-03 20:11:27,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4946, PETRI_PLACES=311, PETRI_TRANSITIONS=370} [2024-06-03 20:11:27,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-03 20:11:27,022 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 370 transitions, 4946 flow [2024-06-03 20:11:27,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:27,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:27,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:11:27,023 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)] === [2024-06-03 20:11:27,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash -963781923, now seen corresponding path program 4 times [2024-06-03 20:11:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125876043] [2024-06-03 20:11:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:27,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:27,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125876043] [2024-06-03 20:11:27,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125876043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:27,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:27,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:27,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778481774] [2024-06-03 20:11:27,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:27,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:27,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:27,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:27,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 370 transitions, 4946 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) [2024-06-03 20:11:27,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:27,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:27,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:29,056 INFO L124 PetriNetUnfolderBase]: 3695/5927 cut-off events. [2024-06-03 20:11:29,056 INFO L125 PetriNetUnfolderBase]: For 545714/545714 co-relation queries the response was YES. [2024-06-03 20:11:29,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51342 conditions, 5927 events. 3695/5927 cut-off events. For 545714/545714 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37341 event pairs, 695 based on Foata normal form. 2/5927 useless extension candidates. Maximal degree in co-relation 51192. Up to 4875 conditions per place. [2024-06-03 20:11:29,139 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 274 selfloop transitions, 133 changer transitions 0/412 dead transitions. [2024-06-03 20:11:29,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 412 transitions, 6607 flow [2024-06-03 20:11:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 20:11:29,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-03 20:11:29,140 INFO L175 Difference]: Start difference. First operand has 311 places, 370 transitions, 4946 flow. Second operand 8 states and 162 transitions. [2024-06-03 20:11:29,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 412 transitions, 6607 flow [2024-06-03 20:11:30,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 412 transitions, 6317 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-06-03 20:11:30,337 INFO L231 Difference]: Finished difference. Result has 308 places, 384 transitions, 5329 flow [2024-06-03 20:11:30,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5329, PETRI_PLACES=308, PETRI_TRANSITIONS=384} [2024-06-03 20:11:30,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 20:11:30,338 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 384 transitions, 5329 flow [2024-06-03 20:11:30,338 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) [2024-06-03 20:11:30,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:30,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:11:30,338 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)] === [2024-06-03 20:11:30,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -951401763, now seen corresponding path program 5 times [2024-06-03 20:11:30,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808672306] [2024-06-03 20:11:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:31,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808672306] [2024-06-03 20:11:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808672306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:31,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:31,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866709594] [2024-06-03 20:11:31,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:31,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:31,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 384 transitions, 5329 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) [2024-06-03 20:11:31,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:31,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:31,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:32,395 INFO L124 PetriNetUnfolderBase]: 3677/5899 cut-off events. [2024-06-03 20:11:32,395 INFO L125 PetriNetUnfolderBase]: For 548790/548790 co-relation queries the response was YES. [2024-06-03 20:11:32,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50596 conditions, 5899 events. 3677/5899 cut-off events. For 548790/548790 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37159 event pairs, 704 based on Foata normal form. 6/5903 useless extension candidates. Maximal degree in co-relation 50448. Up to 4864 conditions per place. [2024-06-03 20:11:32,467 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 276 selfloop transitions, 129 changer transitions 0/410 dead transitions. [2024-06-03 20:11:32,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 410 transitions, 6627 flow [2024-06-03 20:11:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 20:11:32,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-03 20:11:32,469 INFO L175 Difference]: Start difference. First operand has 308 places, 384 transitions, 5329 flow. Second operand 8 states and 161 transitions. [2024-06-03 20:11:32,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 410 transitions, 6627 flow [2024-06-03 20:11:33,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 410 transitions, 6380 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:33,644 INFO L231 Difference]: Finished difference. Result has 312 places, 384 transitions, 5348 flow [2024-06-03 20:11:33,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5348, PETRI_PLACES=312, PETRI_TRANSITIONS=384} [2024-06-03 20:11:33,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:11:33,644 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 384 transitions, 5348 flow [2024-06-03 20:11:33,644 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) [2024-06-03 20:11:33,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:33,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:33,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:11:33,645 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)] === [2024-06-03 20:11:33,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1220282433, now seen corresponding path program 6 times [2024-06-03 20:11:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:33,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505805940] [2024-06-03 20:11:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:33,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:34,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:34,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505805940] [2024-06-03 20:11:34,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505805940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:34,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:34,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:34,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383034909] [2024-06-03 20:11:34,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:34,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:34,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:34,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:34,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 384 transitions, 5348 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) [2024-06-03 20:11:34,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:34,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:34,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:35,589 INFO L124 PetriNetUnfolderBase]: 3663/5881 cut-off events. [2024-06-03 20:11:35,589 INFO L125 PetriNetUnfolderBase]: For 542932/542932 co-relation queries the response was YES. [2024-06-03 20:11:35,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 5881 events. 3663/5881 cut-off events. For 542932/542932 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37034 event pairs, 711 based on Foata normal form. 2/5881 useless extension candidates. Maximal degree in co-relation 50156. Up to 4853 conditions per place. [2024-06-03 20:11:35,668 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 275 selfloop transitions, 133 changer transitions 0/413 dead transitions. [2024-06-03 20:11:35,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 413 transitions, 6810 flow [2024-06-03 20:11:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 20:11:35,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-03 20:11:35,669 INFO L175 Difference]: Start difference. First operand has 312 places, 384 transitions, 5348 flow. Second operand 8 states and 164 transitions. [2024-06-03 20:11:35,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 413 transitions, 6810 flow [2024-06-03 20:11:37,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 413 transitions, 6470 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:37,150 INFO L231 Difference]: Finished difference. Result has 315 places, 384 transitions, 5282 flow [2024-06-03 20:11:37,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5282, PETRI_PLACES=315, PETRI_TRANSITIONS=384} [2024-06-03 20:11:37,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-03 20:11:37,150 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 384 transitions, 5282 flow [2024-06-03 20:11:37,150 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) [2024-06-03 20:11:37,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:37,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:37,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:11:37,151 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)] === [2024-06-03 20:11:37,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1220162463, now seen corresponding path program 7 times [2024-06-03 20:11:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:37,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274978817] [2024-06-03 20:11:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:37,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:37,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:37,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274978817] [2024-06-03 20:11:37,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274978817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:37,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:37,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:37,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331411048] [2024-06-03 20:11:37,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:37,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:38,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:38,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 384 transitions, 5282 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) [2024-06-03 20:11:38,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:38,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:38,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:39,309 INFO L124 PetriNetUnfolderBase]: 3683/5923 cut-off events. [2024-06-03 20:11:39,309 INFO L125 PetriNetUnfolderBase]: For 553828/553828 co-relation queries the response was YES. [2024-06-03 20:11:39,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50509 conditions, 5923 events. 3683/5923 cut-off events. For 553828/553828 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37459 event pairs, 700 based on Foata normal form. 2/5923 useless extension candidates. Maximal degree in co-relation 50359. Up to 5416 conditions per place. [2024-06-03 20:11:39,413 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 334 selfloop transitions, 74 changer transitions 0/413 dead transitions. [2024-06-03 20:11:39,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 413 transitions, 6363 flow [2024-06-03 20:11:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:11:39,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 20:11:39,414 INFO L175 Difference]: Start difference. First operand has 315 places, 384 transitions, 5282 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:11:39,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 413 transitions, 6363 flow [2024-06-03 20:11:40,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 413 transitions, 5867 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-03 20:11:40,753 INFO L231 Difference]: Finished difference. Result has 313 places, 392 transitions, 5095 flow [2024-06-03 20:11:40,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5095, PETRI_PLACES=313, PETRI_TRANSITIONS=392} [2024-06-03 20:11:40,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:11:40,754 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 392 transitions, 5095 flow [2024-06-03 20:11:40,754 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) [2024-06-03 20:11:40,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:40,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:11:40,755 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)] === [2024-06-03 20:11:40,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash -836377503, now seen corresponding path program 8 times [2024-06-03 20:11:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:40,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702341960] [2024-06-03 20:11:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:41,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:41,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702341960] [2024-06-03 20:11:41,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702341960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:41,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:41,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:41,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914261568] [2024-06-03 20:11:41,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:41,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:41,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:41,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:41,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 392 transitions, 5095 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) [2024-06-03 20:11:41,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:41,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:41,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:42,907 INFO L124 PetriNetUnfolderBase]: 3665/5909 cut-off events. [2024-06-03 20:11:42,908 INFO L125 PetriNetUnfolderBase]: For 554972/554972 co-relation queries the response was YES. [2024-06-03 20:11:42,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49005 conditions, 5909 events. 3665/5909 cut-off events. For 554972/554972 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37489 event pairs, 696 based on Foata normal form. 6/5913 useless extension candidates. Maximal degree in co-relation 48856. Up to 5248 conditions per place. [2024-06-03 20:11:42,991 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 329 selfloop transitions, 88 changer transitions 0/422 dead transitions. [2024-06-03 20:11:42,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 422 transitions, 6338 flow [2024-06-03 20:11:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:11:42,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:11:42,992 INFO L175 Difference]: Start difference. First operand has 313 places, 392 transitions, 5095 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:11:42,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 422 transitions, 6338 flow [2024-06-03 20:11:44,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 422 transitions, 6177 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:44,326 INFO L231 Difference]: Finished difference. Result has 319 places, 392 transitions, 5118 flow [2024-06-03 20:11:44,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4934, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5118, PETRI_PLACES=319, PETRI_TRANSITIONS=392} [2024-06-03 20:11:44,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-03 20:11:44,327 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 392 transitions, 5118 flow [2024-06-03 20:11:44,327 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) [2024-06-03 20:11:44,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:44,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:11:44,328 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)] === [2024-06-03 20:11:44,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1633274411, now seen corresponding path program 9 times [2024-06-03 20:11:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797344465] [2024-06-03 20:11:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:44,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:45,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797344465] [2024-06-03 20:11:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797344465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:45,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:45,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:45,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847987324] [2024-06-03 20:11:45,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:45,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:45,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:45,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:45,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:45,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 392 transitions, 5118 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) [2024-06-03 20:11:45,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:45,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:45,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:46,407 INFO L124 PetriNetUnfolderBase]: 3639/5865 cut-off events. [2024-06-03 20:11:46,407 INFO L125 PetriNetUnfolderBase]: For 547752/547752 co-relation queries the response was YES. [2024-06-03 20:11:46,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48420 conditions, 5865 events. 3639/5865 cut-off events. For 547752/547752 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 37114 event pairs, 696 based on Foata normal form. 6/5869 useless extension candidates. Maximal degree in co-relation 48270. Up to 5229 conditions per place. [2024-06-03 20:11:46,483 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 327 selfloop transitions, 83 changer transitions 0/415 dead transitions. [2024-06-03 20:11:46,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 415 transitions, 6126 flow [2024-06-03 20:11:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:11:46,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 20:11:46,485 INFO L175 Difference]: Start difference. First operand has 319 places, 392 transitions, 5118 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:11:46,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 415 transitions, 6126 flow [2024-06-03 20:11:47,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 415 transitions, 5808 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:47,991 INFO L231 Difference]: Finished difference. Result has 319 places, 392 transitions, 4975 flow [2024-06-03 20:11:47,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4800, PETRI_DIFFERENCE_MINUEND_PLACES=311, 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=4975, PETRI_PLACES=319, PETRI_TRANSITIONS=392} [2024-06-03 20:11:47,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-03 20:11:47,991 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 392 transitions, 4975 flow [2024-06-03 20:11:47,992 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) [2024-06-03 20:11:47,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:47,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:11:47,992 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)] === [2024-06-03 20:11:47,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash 762275391, now seen corresponding path program 10 times [2024-06-03 20:11:47,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:47,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686347166] [2024-06-03 20:11:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686347166] [2024-06-03 20:11:48,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686347166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:48,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:48,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:48,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428952539] [2024-06-03 20:11:48,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:48,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:48,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:48,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:48,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 392 transitions, 4975 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) [2024-06-03 20:11:48,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:48,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:48,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:50,123 INFO L124 PetriNetUnfolderBase]: 3621/5849 cut-off events. [2024-06-03 20:11:50,123 INFO L125 PetriNetUnfolderBase]: For 537806/537806 co-relation queries the response was YES. [2024-06-03 20:11:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47420 conditions, 5849 events. 3621/5849 cut-off events. For 537806/537806 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37152 event pairs, 741 based on Foata normal form. 6/5854 useless extension candidates. Maximal degree in co-relation 47269. Up to 5454 conditions per place. [2024-06-03 20:11:50,193 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 358 selfloop transitions, 53 changer transitions 0/416 dead transitions. [2024-06-03 20:11:50,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 416 transitions, 5906 flow [2024-06-03 20:11:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 20:11:50,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-03 20:11:50,194 INFO L175 Difference]: Start difference. First operand has 319 places, 392 transitions, 4975 flow. Second operand 7 states and 144 transitions. [2024-06-03 20:11:50,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 416 transitions, 5906 flow [2024-06-03 20:11:51,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 416 transitions, 5686 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:51,582 INFO L231 Difference]: Finished difference. Result has 319 places, 392 transitions, 4884 flow [2024-06-03 20:11:51,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4884, PETRI_PLACES=319, PETRI_TRANSITIONS=392} [2024-06-03 20:11:51,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-03 20:11:51,582 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 392 transitions, 4884 flow [2024-06-03 20:11:51,583 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) [2024-06-03 20:11:51,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:51,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:51,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:11:51,583 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)] === [2024-06-03 20:11:51,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 968928831, now seen corresponding path program 11 times [2024-06-03 20:11:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125296135] [2024-06-03 20:11:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:52,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:52,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125296135] [2024-06-03 20:11:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125296135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:52,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:52,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486723432] [2024-06-03 20:11:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:52,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:52,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:52,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:52,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 392 transitions, 4884 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) [2024-06-03 20:11:52,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:52,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:52,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:53,628 INFO L124 PetriNetUnfolderBase]: 3603/5807 cut-off events. [2024-06-03 20:11:53,628 INFO L125 PetriNetUnfolderBase]: For 526906/526906 co-relation queries the response was YES. [2024-06-03 20:11:53,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46507 conditions, 5807 events. 3603/5807 cut-off events. For 526906/526906 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36722 event pairs, 722 based on Foata normal form. 6/5811 useless extension candidates. Maximal degree in co-relation 46355. Up to 5102 conditions per place. [2024-06-03 20:11:53,721 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 320 selfloop transitions, 94 changer transitions 0/419 dead transitions. [2024-06-03 20:11:53,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 419 transitions, 6048 flow [2024-06-03 20:11:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 20:11:53,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:11:53,723 INFO L175 Difference]: Start difference. First operand has 319 places, 392 transitions, 4884 flow. Second operand 7 states and 147 transitions. [2024-06-03 20:11:53,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 419 transitions, 6048 flow [2024-06-03 20:11:55,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 419 transitions, 5873 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:55,271 INFO L231 Difference]: Finished difference. Result has 320 places, 392 transitions, 4917 flow [2024-06-03 20:11:55,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4917, PETRI_PLACES=320, PETRI_TRANSITIONS=392} [2024-06-03 20:11:55,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 20:11:55,272 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 392 transitions, 4917 flow [2024-06-03 20:11:55,272 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) [2024-06-03 20:11:55,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:55,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:55,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:11:55,273 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)] === [2024-06-03 20:11:55,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:55,274 INFO L85 PathProgramCache]: Analyzing trace with hash -663794547, now seen corresponding path program 12 times [2024-06-03 20:11:55,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:55,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809378068] [2024-06-03 20:11:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:56,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:56,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809378068] [2024-06-03 20:11:56,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809378068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:56,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:56,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525625613] [2024-06-03 20:11:56,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:56,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:11:56,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 392 transitions, 4917 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) [2024-06-03 20:11:56,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:56,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:11:56,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:57,407 INFO L124 PetriNetUnfolderBase]: 3577/5765 cut-off events. [2024-06-03 20:11:57,408 INFO L125 PetriNetUnfolderBase]: For 506177/506177 co-relation queries the response was YES. [2024-06-03 20:11:57,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45743 conditions, 5765 events. 3577/5765 cut-off events. For 506177/506177 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36395 event pairs, 702 based on Foata normal form. 6/5769 useless extension candidates. Maximal degree in co-relation 45590. Up to 5083 conditions per place. [2024-06-03 20:11:57,505 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 316 selfloop transitions, 97 changer transitions 0/418 dead transitions. [2024-06-03 20:11:57,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 418 transitions, 5911 flow [2024-06-03 20:11:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 20:11:57,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-03 20:11:57,507 INFO L175 Difference]: Start difference. First operand has 320 places, 392 transitions, 4917 flow. Second operand 7 states and 145 transitions. [2024-06-03 20:11:57,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 418 transitions, 5911 flow [2024-06-03 20:11:59,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 418 transitions, 5595 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:59,242 INFO L231 Difference]: Finished difference. Result has 320 places, 392 transitions, 4811 flow [2024-06-03 20:11:59,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4811, PETRI_PLACES=320, PETRI_TRANSITIONS=392} [2024-06-03 20:11:59,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 20:11:59,243 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 392 transitions, 4811 flow [2024-06-03 20:11:59,243 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) [2024-06-03 20:11:59,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:59,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:59,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:11:59,243 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)] === [2024-06-03 20:11:59,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1190618325, now seen corresponding path program 1 times [2024-06-03 20:11:59,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:59,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274560343] [2024-06-03 20:11:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:59,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:00,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274560343] [2024-06-03 20:12:00,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274560343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:00,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:00,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771682881] [2024-06-03 20:12:00,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:00,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:00,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:00,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:00,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 392 transitions, 4811 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:00,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:00,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:00,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:01,429 INFO L124 PetriNetUnfolderBase]: 3605/5819 cut-off events. [2024-06-03 20:12:01,430 INFO L125 PetriNetUnfolderBase]: For 510170/510170 co-relation queries the response was YES. [2024-06-03 20:12:01,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45827 conditions, 5819 events. 3605/5819 cut-off events. For 510170/510170 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 36737 event pairs, 684 based on Foata normal form. 8/5826 useless extension candidates. Maximal degree in co-relation 45674. Up to 5362 conditions per place. [2024-06-03 20:12:01,514 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 376 selfloop transitions, 35 changer transitions 0/416 dead transitions. [2024-06-03 20:12:01,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 416 transitions, 5781 flow [2024-06-03 20:12:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:12:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:12:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 20:12:01,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-03 20:12:01,516 INFO L175 Difference]: Start difference. First operand has 320 places, 392 transitions, 4811 flow. Second operand 6 states and 129 transitions. [2024-06-03 20:12:01,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 416 transitions, 5781 flow [2024-06-03 20:12:02,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 416 transitions, 5505 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:12:03,002 INFO L231 Difference]: Finished difference. Result has 318 places, 393 transitions, 4629 flow [2024-06-03 20:12:03,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4629, PETRI_PLACES=318, PETRI_TRANSITIONS=393} [2024-06-03 20:12:03,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 20:12:03,003 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 393 transitions, 4629 flow [2024-06-03 20:12:03,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:03,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:03,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:03,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:12:03,003 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)] === [2024-06-03 20:12:03,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1205855445, now seen corresponding path program 2 times [2024-06-03 20:12:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:03,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533088170] [2024-06-03 20:12:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:03,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:03,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533088170] [2024-06-03 20:12:03,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533088170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:03,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:03,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700891367] [2024-06-03 20:12:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:03,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 393 transitions, 4629 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:05,057 INFO L124 PetriNetUnfolderBase]: 3607/5811 cut-off events. [2024-06-03 20:12:05,057 INFO L125 PetriNetUnfolderBase]: For 496240/496240 co-relation queries the response was YES. [2024-06-03 20:12:05,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45170 conditions, 5811 events. 3607/5811 cut-off events. For 496240/496240 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36681 event pairs, 703 based on Foata normal form. 8/5815 useless extension candidates. Maximal degree in co-relation 45017. Up to 5228 conditions per place. [2024-06-03 20:12:05,132 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 383 selfloop transitions, 30 changer transitions 0/418 dead transitions. [2024-06-03 20:12:05,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 418 transitions, 5827 flow [2024-06-03 20:12:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:12:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:12:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 20:12:05,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 20:12:05,133 INFO L175 Difference]: Start difference. First operand has 318 places, 393 transitions, 4629 flow. Second operand 6 states and 122 transitions. [2024-06-03 20:12:05,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 418 transitions, 5827 flow [2024-06-03 20:12:06,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 418 transitions, 5763 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:06,634 INFO L231 Difference]: Finished difference. Result has 320 places, 394 transitions, 4641 flow [2024-06-03 20:12:06,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4641, PETRI_PLACES=320, PETRI_TRANSITIONS=394} [2024-06-03 20:12:06,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 20:12:06,635 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 394 transitions, 4641 flow [2024-06-03 20:12:06,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:06,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:06,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:06,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:12:06,636 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)] === [2024-06-03 20:12:06,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:06,636 INFO L85 PathProgramCache]: Analyzing trace with hash -954248803, now seen corresponding path program 1 times [2024-06-03 20:12:06,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:06,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072224222] [2024-06-03 20:12:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:06,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:07,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:07,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072224222] [2024-06-03 20:12:07,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072224222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:07,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:07,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:07,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464129547] [2024-06-03 20:12:07,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:07,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:07,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:07,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:07,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 394 transitions, 4641 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:07,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:07,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:07,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:09,033 INFO L124 PetriNetUnfolderBase]: 3615/5849 cut-off events. [2024-06-03 20:12:09,033 INFO L125 PetriNetUnfolderBase]: For 487979/487979 co-relation queries the response was YES. [2024-06-03 20:12:09,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45511 conditions, 5849 events. 3615/5849 cut-off events. For 487979/487979 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 37073 event pairs, 697 based on Foata normal form. 2/5850 useless extension candidates. Maximal degree in co-relation 45357. Up to 5500 conditions per place. [2024-06-03 20:12:09,128 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 47 changer transitions 0/424 dead transitions. [2024-06-03 20:12:09,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 424 transitions, 5839 flow [2024-06-03 20:12:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:12:09,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:12:09,130 INFO L175 Difference]: Start difference. First operand has 320 places, 394 transitions, 4641 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:12:09,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 424 transitions, 5839 flow [2024-06-03 20:12:10,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 424 transitions, 5788 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:10,666 INFO L231 Difference]: Finished difference. Result has 326 places, 398 transitions, 4821 flow [2024-06-03 20:12:10,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4821, PETRI_PLACES=326, PETRI_TRANSITIONS=398} [2024-06-03 20:12:10,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-03 20:12:10,666 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 398 transitions, 4821 flow [2024-06-03 20:12:10,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:10,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:10,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:12:10,667 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)] === [2024-06-03 20:12:10,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:10,667 INFO L85 PathProgramCache]: Analyzing trace with hash -431073885, now seen corresponding path program 2 times [2024-06-03 20:12:10,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:10,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144644397] [2024-06-03 20:12:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:10,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144644397] [2024-06-03 20:12:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144644397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:11,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:11,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33873718] [2024-06-03 20:12:11,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:11,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:11,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:11,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 398 transitions, 4821 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:11,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:11,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:11,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:12,986 INFO L124 PetriNetUnfolderBase]: 3623/5861 cut-off events. [2024-06-03 20:12:12,986 INFO L125 PetriNetUnfolderBase]: For 499745/499745 co-relation queries the response was YES. [2024-06-03 20:12:13,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45788 conditions, 5861 events. 3623/5861 cut-off events. For 499745/499745 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 37144 event pairs, 731 based on Foata normal form. 2/5862 useless extension candidates. Maximal degree in co-relation 45633. Up to 5547 conditions per place. [2024-06-03 20:12:13,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 44 changer transitions 0/421 dead transitions. [2024-06-03 20:12:13,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 421 transitions, 5773 flow [2024-06-03 20:12:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:12:13,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 20:12:13,068 INFO L175 Difference]: Start difference. First operand has 326 places, 398 transitions, 4821 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:12:13,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 421 transitions, 5773 flow [2024-06-03 20:12:14,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 421 transitions, 5622 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 20:12:14,378 INFO L231 Difference]: Finished difference. Result has 330 places, 400 transitions, 4835 flow [2024-06-03 20:12:14,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4835, PETRI_PLACES=330, PETRI_TRANSITIONS=400} [2024-06-03 20:12:14,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-03 20:12:14,379 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 400 transitions, 4835 flow [2024-06-03 20:12:14,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:14,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:14,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:14,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:12:14,379 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)] === [2024-06-03 20:12:14,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash -951507039, now seen corresponding path program 1 times [2024-06-03 20:12:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:14,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864040275] [2024-06-03 20:12:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:15,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864040275] [2024-06-03 20:12:15,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864040275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:15,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:15,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287973037] [2024-06-03 20:12:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:15,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:15,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:15,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 400 transitions, 4835 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:15,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:15,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:15,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:16,597 INFO L124 PetriNetUnfolderBase]: 3671/5922 cut-off events. [2024-06-03 20:12:16,598 INFO L125 PetriNetUnfolderBase]: For 530932/530932 co-relation queries the response was YES. [2024-06-03 20:12:16,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46702 conditions, 5922 events. 3671/5922 cut-off events. For 530932/530932 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 37631 event pairs, 687 based on Foata normal form. 4/5923 useless extension candidates. Maximal degree in co-relation 46545. Up to 5008 conditions per place. [2024-06-03 20:12:16,681 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 376 selfloop transitions, 121 changer transitions 0/502 dead transitions. [2024-06-03 20:12:16,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 502 transitions, 7511 flow [2024-06-03 20:12:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 20:12:16,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-03 20:12:16,682 INFO L175 Difference]: Start difference. First operand has 330 places, 400 transitions, 4835 flow. Second operand 9 states and 181 transitions. [2024-06-03 20:12:16,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 502 transitions, 7511 flow [2024-06-03 20:12:17,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 502 transitions, 7386 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:17,951 INFO L231 Difference]: Finished difference. Result has 336 places, 458 transitions, 5863 flow [2024-06-03 20:12:17,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5863, PETRI_PLACES=336, PETRI_TRANSITIONS=458} [2024-06-03 20:12:17,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-03 20:12:17,951 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 458 transitions, 5863 flow [2024-06-03 20:12:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:17,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:17,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:12:17,952 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)] === [2024-06-03 20:12:17,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -951391843, now seen corresponding path program 3 times [2024-06-03 20:12:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572578574] [2024-06-03 20:12:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:19,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:19,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572578574] [2024-06-03 20:12:19,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572578574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:19,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:19,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112605483] [2024-06-03 20:12:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:19,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:19,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:19,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:19,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 458 transitions, 5863 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:19,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:19,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:19,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:20,448 INFO L124 PetriNetUnfolderBase]: 3679/5936 cut-off events. [2024-06-03 20:12:20,449 INFO L125 PetriNetUnfolderBase]: For 541507/541507 co-relation queries the response was YES. [2024-06-03 20:12:20,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48599 conditions, 5936 events. 3679/5936 cut-off events. For 541507/541507 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37629 event pairs, 732 based on Foata normal form. 2/5937 useless extension candidates. Maximal degree in co-relation 48437. Up to 5644 conditions per place. [2024-06-03 20:12:20,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 33 changer transitions 0/478 dead transitions. [2024-06-03 20:12:20,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 478 transitions, 6905 flow [2024-06-03 20:12:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:12:20,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 20:12:20,535 INFO L175 Difference]: Start difference. First operand has 336 places, 458 transitions, 5863 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:12:20,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 478 transitions, 6905 flow [2024-06-03 20:12:21,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 478 transitions, 6749 flow, removed 77 selfloop flow, removed 1 redundant places. [2024-06-03 20:12:21,888 INFO L231 Difference]: Finished difference. Result has 344 places, 460 transitions, 5834 flow [2024-06-03 20:12:21,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5834, PETRI_PLACES=344, PETRI_TRANSITIONS=460} [2024-06-03 20:12:21,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 20:12:21,889 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 460 transitions, 5834 flow [2024-06-03 20:12:21,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:21,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:21,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:21,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:12:21,890 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)] === [2024-06-03 20:12:21,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash -951387069, now seen corresponding path program 2 times [2024-06-03 20:12:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:21,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418757857] [2024-06-03 20:12:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:21,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418757857] [2024-06-03 20:12:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418757857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:22,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:22,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017854829] [2024-06-03 20:12:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:22,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:22,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:22,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 460 transitions, 5834 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:22,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:22,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:22,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:24,341 INFO L124 PetriNetUnfolderBase]: 3709/5972 cut-off events. [2024-06-03 20:12:24,341 INFO L125 PetriNetUnfolderBase]: For 565121/565121 co-relation queries the response was YES. [2024-06-03 20:12:24,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48413 conditions, 5972 events. 3709/5972 cut-off events. For 565121/565121 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 37855 event pairs, 690 based on Foata normal form. 6/5976 useless extension candidates. Maximal degree in co-relation 48248. Up to 4961 conditions per place. [2024-06-03 20:12:24,427 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 308 selfloop transitions, 180 changer transitions 0/493 dead transitions. [2024-06-03 20:12:24,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 493 transitions, 7144 flow [2024-06-03 20:12:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 20:12:24,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-03 20:12:24,428 INFO L175 Difference]: Start difference. First operand has 344 places, 460 transitions, 5834 flow. Second operand 9 states and 176 transitions. [2024-06-03 20:12:24,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 493 transitions, 7144 flow [2024-06-03 20:12:26,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 493 transitions, 7037 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:26,200 INFO L231 Difference]: Finished difference. Result has 346 places, 467 transitions, 6264 flow [2024-06-03 20:12:26,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6264, PETRI_PLACES=346, PETRI_TRANSITIONS=467} [2024-06-03 20:12:26,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-03 20:12:26,201 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 467 transitions, 6264 flow [2024-06-03 20:12:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:26,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:26,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:26,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:12:26,202 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)] === [2024-06-03 20:12:26,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -951391719, now seen corresponding path program 3 times [2024-06-03 20:12:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:26,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626150638] [2024-06-03 20:12:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:27,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626150638] [2024-06-03 20:12:27,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626150638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:27,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:27,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:27,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937397725] [2024-06-03 20:12:27,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:27,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:27,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 467 transitions, 6264 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:28,586 INFO L124 PetriNetUnfolderBase]: 3757/6045 cut-off events. [2024-06-03 20:12:28,586 INFO L125 PetriNetUnfolderBase]: For 586705/586705 co-relation queries the response was YES. [2024-06-03 20:12:28,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50671 conditions, 6045 events. 3757/6045 cut-off events. For 586705/586705 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38360 event pairs, 688 based on Foata normal form. 4/6047 useless extension candidates. Maximal degree in co-relation 50505. Up to 5298 conditions per place. [2024-06-03 20:12:28,672 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 400 selfloop transitions, 109 changer transitions 0/514 dead transitions. [2024-06-03 20:12:28,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 514 transitions, 8266 flow [2024-06-03 20:12:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 20:12:28,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-03 20:12:28,681 INFO L175 Difference]: Start difference. First operand has 346 places, 467 transitions, 6264 flow. Second operand 9 states and 176 transitions. [2024-06-03 20:12:28,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 514 transitions, 8266 flow [2024-06-03 20:12:30,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 514 transitions, 7781 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:30,326 INFO L231 Difference]: Finished difference. Result has 349 places, 476 transitions, 6244 flow [2024-06-03 20:12:30,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6244, PETRI_PLACES=349, PETRI_TRANSITIONS=476} [2024-06-03 20:12:30,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-03 20:12:30,326 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 476 transitions, 6244 flow [2024-06-03 20:12:30,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:30,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:30,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:12:30,327 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)] === [2024-06-03 20:12:30,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -835915975, now seen corresponding path program 1 times [2024-06-03 20:12:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:30,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215833270] [2024-06-03 20:12:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215833270] [2024-06-03 20:12:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215833270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:31,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:31,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:31,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024756805] [2024-06-03 20:12:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:31,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:31,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 476 transitions, 6244 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:31,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:31,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:31,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:32,723 INFO L124 PetriNetUnfolderBase]: 3809/6127 cut-off events. [2024-06-03 20:12:32,723 INFO L125 PetriNetUnfolderBase]: For 643038/643038 co-relation queries the response was YES. [2024-06-03 20:12:32,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51250 conditions, 6127 events. 3809/6127 cut-off events. For 643038/643038 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38986 event pairs, 701 based on Foata normal form. 14/6139 useless extension candidates. Maximal degree in co-relation 51082. Up to 5564 conditions per place. [2024-06-03 20:12:32,812 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 421 selfloop transitions, 78 changer transitions 0/504 dead transitions. [2024-06-03 20:12:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 504 transitions, 7534 flow [2024-06-03 20:12:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:12:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:12:32,814 INFO L175 Difference]: Start difference. First operand has 349 places, 476 transitions, 6244 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:12:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 504 transitions, 7534 flow [2024-06-03 20:12:34,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 504 transitions, 7305 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:34,667 INFO L231 Difference]: Finished difference. Result has 353 places, 478 transitions, 6246 flow [2024-06-03 20:12:34,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=353, PETRI_TRANSITIONS=478} [2024-06-03 20:12:34,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 20:12:34,668 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 478 transitions, 6246 flow [2024-06-03 20:12:34,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:34,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:34,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:34,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:12:34,669 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)] === [2024-06-03 20:12:34,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash -312808451, now seen corresponding path program 4 times [2024-06-03 20:12:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508460537] [2024-06-03 20:12:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:34,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508460537] [2024-06-03 20:12:35,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508460537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:35,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:35,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939931608] [2024-06-03 20:12:35,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:35,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:35,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 478 transitions, 6246 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:35,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:35,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:37,451 INFO L124 PetriNetUnfolderBase]: 3829/6155 cut-off events. [2024-06-03 20:12:37,451 INFO L125 PetriNetUnfolderBase]: For 614169/614169 co-relation queries the response was YES. [2024-06-03 20:12:37,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51626 conditions, 6155 events. 3829/6155 cut-off events. For 614169/614169 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39197 event pairs, 712 based on Foata normal form. 4/6157 useless extension candidates. Maximal degree in co-relation 51456. Up to 5642 conditions per place. [2024-06-03 20:12:37,554 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 84 changer transitions 0/516 dead transitions. [2024-06-03 20:12:37,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 516 transitions, 7816 flow [2024-06-03 20:12:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:12:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:12:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-03 20:12:37,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-03 20:12:37,556 INFO L175 Difference]: Start difference. First operand has 353 places, 478 transitions, 6246 flow. Second operand 11 states and 201 transitions. [2024-06-03 20:12:37,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 516 transitions, 7816 flow [2024-06-03 20:12:39,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 516 transitions, 7611 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:39,358 INFO L231 Difference]: Finished difference. Result has 359 places, 492 transitions, 6495 flow [2024-06-03 20:12:39,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6041, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6495, PETRI_PLACES=359, PETRI_TRANSITIONS=492} [2024-06-03 20:12:39,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-03 20:12:39,359 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 492 transitions, 6495 flow [2024-06-03 20:12:39,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:39,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:39,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:39,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:12:39,360 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)] === [2024-06-03 20:12:39,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -836095899, now seen corresponding path program 5 times [2024-06-03 20:12:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:39,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026979491] [2024-06-03 20:12:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:39,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026979491] [2024-06-03 20:12:40,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026979491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:40,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:40,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:40,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796597404] [2024-06-03 20:12:40,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:40,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:40,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:40,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:40,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 492 transitions, 6495 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:40,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:40,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:40,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:41,829 INFO L124 PetriNetUnfolderBase]: 3849/6183 cut-off events. [2024-06-03 20:12:41,830 INFO L125 PetriNetUnfolderBase]: For 625708/625708 co-relation queries the response was YES. [2024-06-03 20:12:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52077 conditions, 6183 events. 3849/6183 cut-off events. For 625708/625708 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39349 event pairs, 713 based on Foata normal form. 4/6185 useless extension candidates. Maximal degree in co-relation 51905. Up to 5670 conditions per place. [2024-06-03 20:12:41,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 78 changer transitions 0/516 dead transitions. [2024-06-03 20:12:41,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 516 transitions, 7907 flow [2024-06-03 20:12:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:12:41,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:12:41,918 INFO L175 Difference]: Start difference. First operand has 359 places, 492 transitions, 6495 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:12:41,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 516 transitions, 7907 flow [2024-06-03 20:12:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 516 transitions, 7703 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:43,957 INFO L231 Difference]: Finished difference. Result has 365 places, 496 transitions, 6572 flow [2024-06-03 20:12:43,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6291, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6572, PETRI_PLACES=365, PETRI_TRANSITIONS=496} [2024-06-03 20:12:43,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-03 20:12:43,958 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 496 transitions, 6572 flow [2024-06-03 20:12:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:12:43,958 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)] === [2024-06-03 20:12:43,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -312986081, now seen corresponding path program 6 times [2024-06-03 20:12:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90069607] [2024-06-03 20:12:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:44,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:44,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90069607] [2024-06-03 20:12:44,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90069607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:44,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:44,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759622683] [2024-06-03 20:12:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:45,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:45,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 496 transitions, 6572 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:45,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:45,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:45,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:46,749 INFO L124 PetriNetUnfolderBase]: 3935/6307 cut-off events. [2024-06-03 20:12:46,749 INFO L125 PetriNetUnfolderBase]: For 673362/673362 co-relation queries the response was YES. [2024-06-03 20:12:46,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54206 conditions, 6307 events. 3935/6307 cut-off events. For 673362/673362 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 40105 event pairs, 705 based on Foata normal form. 6/6311 useless extension candidates. Maximal degree in co-relation 54032. Up to 5534 conditions per place. [2024-06-03 20:12:46,845 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 400 selfloop transitions, 128 changer transitions 0/533 dead transitions. [2024-06-03 20:12:46,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 533 transitions, 8331 flow [2024-06-03 20:12:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 20:12:46,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-03 20:12:46,846 INFO L175 Difference]: Start difference. First operand has 365 places, 496 transitions, 6572 flow. Second operand 10 states and 191 transitions. [2024-06-03 20:12:46,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 533 transitions, 8331 flow [2024-06-03 20:12:48,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 533 transitions, 8072 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:48,740 INFO L231 Difference]: Finished difference. Result has 369 places, 510 transitions, 7009 flow [2024-06-03 20:12:48,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7009, PETRI_PLACES=369, PETRI_TRANSITIONS=510} [2024-06-03 20:12:48,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-03 20:12:48,741 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 510 transitions, 7009 flow [2024-06-03 20:12:48,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:48,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:48,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:12:48,742 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)] === [2024-06-03 20:12:48,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -836100673, now seen corresponding path program 4 times [2024-06-03 20:12:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168306824] [2024-06-03 20:12:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:48,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:49,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:49,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168306824] [2024-06-03 20:12:49,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168306824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:49,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:49,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:49,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550821957] [2024-06-03 20:12:49,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:49,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:49,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:49,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 510 transitions, 7009 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:49,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:49,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:49,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:51,541 INFO L124 PetriNetUnfolderBase]: 3943/6329 cut-off events. [2024-06-03 20:12:51,541 INFO L125 PetriNetUnfolderBase]: For 678112/678112 co-relation queries the response was YES. [2024-06-03 20:12:51,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55231 conditions, 6329 events. 3943/6329 cut-off events. For 678112/678112 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40271 event pairs, 770 based on Foata normal form. 2/6330 useless extension candidates. Maximal degree in co-relation 55055. Up to 6036 conditions per place. [2024-06-03 20:12:51,631 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 25 changer transitions 0/527 dead transitions. [2024-06-03 20:12:51,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 527 transitions, 8145 flow [2024-06-03 20:12:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:12:51,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 20:12:51,633 INFO L175 Difference]: Start difference. First operand has 369 places, 510 transitions, 7009 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:12:51,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 527 transitions, 8145 flow [2024-06-03 20:12:53,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 527 transitions, 7797 flow, removed 106 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:53,808 INFO L231 Difference]: Finished difference. Result has 372 places, 512 transitions, 6776 flow [2024-06-03 20:12:53,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6661, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6776, PETRI_PLACES=372, PETRI_TRANSITIONS=512} [2024-06-03 20:12:53,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-03 20:12:53,816 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 512 transitions, 6776 flow [2024-06-03 20:12:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:53,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:53,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:12:53,817 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)] === [2024-06-03 20:12:53,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1197291509, now seen corresponding path program 2 times [2024-06-03 20:12:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:53,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774999446] [2024-06-03 20:12:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:54,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:54,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774999446] [2024-06-03 20:12:54,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774999446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:54,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:54,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:54,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644507227] [2024-06-03 20:12:54,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:54,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:54,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:54,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:54,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:54,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 512 transitions, 6776 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:54,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:54,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:56,388 INFO L124 PetriNetUnfolderBase]: 4000/6408 cut-off events. [2024-06-03 20:12:56,389 INFO L125 PetriNetUnfolderBase]: For 744152/744152 co-relation queries the response was YES. [2024-06-03 20:12:56,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55440 conditions, 6408 events. 4000/6408 cut-off events. For 744152/744152 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40885 event pairs, 787 based on Foata normal form. 14/6418 useless extension candidates. Maximal degree in co-relation 55262. Up to 5998 conditions per place. [2024-06-03 20:12:56,490 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 496 selfloop transitions, 34 changer transitions 0/535 dead transitions. [2024-06-03 20:12:56,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 535 transitions, 8085 flow [2024-06-03 20:12:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:12:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:12:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 20:12:56,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:12:56,491 INFO L175 Difference]: Start difference. First operand has 372 places, 512 transitions, 6776 flow. Second operand 7 states and 133 transitions. [2024-06-03 20:12:56,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 535 transitions, 8085 flow [2024-06-03 20:12:58,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 535 transitions, 7990 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:58,527 INFO L231 Difference]: Finished difference. Result has 373 places, 517 transitions, 6877 flow [2024-06-03 20:12:58,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6877, PETRI_PLACES=373, PETRI_TRANSITIONS=517} [2024-06-03 20:12:58,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-03 20:12:58,527 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 517 transitions, 6877 flow [2024-06-03 20:12:58,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:58,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:58,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:58,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:12:58,528 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)] === [2024-06-03 20:12:58,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash 969205661, now seen corresponding path program 5 times [2024-06-03 20:12:58,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:58,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634595541] [2024-06-03 20:12:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:58,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:59,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634595541] [2024-06-03 20:12:59,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634595541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:59,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:59,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:59,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578672252] [2024-06-03 20:12:59,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:59,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:12:59,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 517 transitions, 6877 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:59,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:59,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:12:59,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:01,208 INFO L124 PetriNetUnfolderBase]: 3995/6409 cut-off events. [2024-06-03 20:13:01,208 INFO L125 PetriNetUnfolderBase]: For 694140/694140 co-relation queries the response was YES. [2024-06-03 20:13:01,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55471 conditions, 6409 events. 3995/6409 cut-off events. For 694140/694140 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40842 event pairs, 743 based on Foata normal form. 2/6410 useless extension candidates. Maximal degree in co-relation 55291. Up to 6083 conditions per place. [2024-06-03 20:13:01,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 30 changer transitions 0/540 dead transitions. [2024-06-03 20:13:01,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 540 transitions, 8005 flow [2024-06-03 20:13:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:13:01,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:13:01,315 INFO L175 Difference]: Start difference. First operand has 373 places, 517 transitions, 6877 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:13:01,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 540 transitions, 8005 flow [2024-06-03 20:13:03,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 540 transitions, 7858 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:03,606 INFO L231 Difference]: Finished difference. Result has 377 places, 517 transitions, 6798 flow [2024-06-03 20:13:03,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6730, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6798, PETRI_PLACES=377, PETRI_TRANSITIONS=517} [2024-06-03 20:13:03,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-03 20:13:03,609 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 517 transitions, 6798 flow [2024-06-03 20:13:03,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:03,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:03,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:03,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:13:03,610 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)] === [2024-06-03 20:13:03,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 654626141, now seen corresponding path program 3 times [2024-06-03 20:13:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:03,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363873906] [2024-06-03 20:13:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:04,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:04,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363873906] [2024-06-03 20:13:04,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363873906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:04,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:04,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736898689] [2024-06-03 20:13:04,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:04,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:04,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:04,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:04,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 517 transitions, 6798 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:04,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:04,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:04,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:06,175 INFO L124 PetriNetUnfolderBase]: 4049/6486 cut-off events. [2024-06-03 20:13:06,175 INFO L125 PetriNetUnfolderBase]: For 765367/765367 co-relation queries the response was YES. [2024-06-03 20:13:06,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55939 conditions, 6486 events. 4049/6486 cut-off events. For 765367/765367 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41484 event pairs, 730 based on Foata normal form. 16/6498 useless extension candidates. Maximal degree in co-relation 55759. Up to 5789 conditions per place. [2024-06-03 20:13:06,271 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 442 selfloop transitions, 98 changer transitions 0/545 dead transitions. [2024-06-03 20:13:06,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 545 transitions, 8228 flow [2024-06-03 20:13:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-03 20:13:06,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:13:06,272 INFO L175 Difference]: Start difference. First operand has 377 places, 517 transitions, 6798 flow. Second operand 7 states and 140 transitions. [2024-06-03 20:13:06,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 545 transitions, 8228 flow [2024-06-03 20:13:08,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 545 transitions, 8147 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:13:08,725 INFO L231 Difference]: Finished difference. Result has 378 places, 522 transitions, 7121 flow [2024-06-03 20:13:08,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6717, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7121, PETRI_PLACES=378, PETRI_TRANSITIONS=522} [2024-06-03 20:13:08,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:13:08,726 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 522 transitions, 7121 flow [2024-06-03 20:13:08,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:08,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:08,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:13:08,727 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)] === [2024-06-03 20:13:08,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1205862389, now seen corresponding path program 4 times [2024-06-03 20:13:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:08,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067725792] [2024-06-03 20:13:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067725792] [2024-06-03 20:13:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067725792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:09,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946636344] [2024-06-03 20:13:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:09,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:09,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 522 transitions, 7121 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:09,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:09,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:09,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:11,360 INFO L124 PetriNetUnfolderBase]: 4129/6598 cut-off events. [2024-06-03 20:13:11,360 INFO L125 PetriNetUnfolderBase]: For 795481/795481 co-relation queries the response was YES. [2024-06-03 20:13:11,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58030 conditions, 6598 events. 4129/6598 cut-off events. For 795481/795481 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42254 event pairs, 789 based on Foata normal form. 14/6608 useless extension candidates. Maximal degree in co-relation 57848. Up to 6141 conditions per place. [2024-06-03 20:13:11,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 506 selfloop transitions, 36 changer transitions 0/547 dead transitions. [2024-06-03 20:13:11,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 547 transitions, 8500 flow [2024-06-03 20:13:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 20:13:11,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 20:13:11,463 INFO L175 Difference]: Start difference. First operand has 378 places, 522 transitions, 7121 flow. Second operand 7 states and 137 transitions. [2024-06-03 20:13:11,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 547 transitions, 8500 flow [2024-06-03 20:13:13,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 547 transitions, 8273 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:13,911 INFO L231 Difference]: Finished difference. Result has 382 places, 527 transitions, 7104 flow [2024-06-03 20:13:13,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6894, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7104, PETRI_PLACES=382, PETRI_TRANSITIONS=527} [2024-06-03 20:13:13,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-03 20:13:13,911 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 527 transitions, 7104 flow [2024-06-03 20:13:13,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:13,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:13,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:13,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:13:13,912 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)] === [2024-06-03 20:13:13,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1205565471, now seen corresponding path program 1 times [2024-06-03 20:13:13,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:13,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573826308] [2024-06-03 20:13:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573826308] [2024-06-03 20:13:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573826308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:14,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:14,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135908702] [2024-06-03 20:13:14,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:14,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:14,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:14,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 527 transitions, 7104 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:14,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:14,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:14,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:16,522 INFO L124 PetriNetUnfolderBase]: 4141/6613 cut-off events. [2024-06-03 20:13:16,523 INFO L125 PetriNetUnfolderBase]: For 742386/742386 co-relation queries the response was YES. [2024-06-03 20:13:16,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58322 conditions, 6613 events. 4141/6613 cut-off events. For 742386/742386 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42328 event pairs, 810 based on Foata normal form. 4/6613 useless extension candidates. Maximal degree in co-relation 58138. Up to 6201 conditions per place. [2024-06-03 20:13:16,621 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 57 changer transitions 0/547 dead transitions. [2024-06-03 20:13:16,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 547 transitions, 8473 flow [2024-06-03 20:13:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 20:13:16,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:13:16,623 INFO L175 Difference]: Start difference. First operand has 382 places, 527 transitions, 7104 flow. Second operand 7 states and 133 transitions. [2024-06-03 20:13:16,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 547 transitions, 8473 flow [2024-06-03 20:13:18,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 547 transitions, 8328 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:18,795 INFO L231 Difference]: Finished difference. Result has 385 places, 533 transitions, 7288 flow [2024-06-03 20:13:18,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7288, PETRI_PLACES=385, PETRI_TRANSITIONS=533} [2024-06-03 20:13:18,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-03 20:13:18,796 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 533 transitions, 7288 flow [2024-06-03 20:13:18,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:18,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:18,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:13:18,797 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)] === [2024-06-03 20:13:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1205565719, now seen corresponding path program 5 times [2024-06-03 20:13:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638413727] [2024-06-03 20:13:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:19,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:19,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638413727] [2024-06-03 20:13:19,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638413727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:19,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:19,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239754600] [2024-06-03 20:13:19,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:19,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:19,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 533 transitions, 7288 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:19,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:19,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:19,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:21,445 INFO L124 PetriNetUnfolderBase]: 4172/6660 cut-off events. [2024-06-03 20:13:21,446 INFO L125 PetriNetUnfolderBase]: For 787972/787972 co-relation queries the response was YES. [2024-06-03 20:13:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58898 conditions, 6660 events. 4172/6660 cut-off events. For 787972/787972 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 42630 event pairs, 813 based on Foata normal form. 12/6668 useless extension candidates. Maximal degree in co-relation 58713. Up to 6184 conditions per place. [2024-06-03 20:13:21,544 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 499 selfloop transitions, 49 changer transitions 0/553 dead transitions. [2024-06-03 20:13:21,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 553 transitions, 8633 flow [2024-06-03 20:13:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 20:13:21,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-03 20:13:21,546 INFO L175 Difference]: Start difference. First operand has 385 places, 533 transitions, 7288 flow. Second operand 7 states and 135 transitions. [2024-06-03 20:13:21,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 553 transitions, 8633 flow [2024-06-03 20:13:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 553 transitions, 8386 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:23,732 INFO L231 Difference]: Finished difference. Result has 387 places, 535 transitions, 7241 flow [2024-06-03 20:13:23,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7241, PETRI_PLACES=387, PETRI_TRANSITIONS=535} [2024-06-03 20:13:23,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-03 20:13:23,732 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 535 transitions, 7241 flow [2024-06-03 20:13:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:23,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:23,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:23,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:13:23,733 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)] === [2024-06-03 20:13:23,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1197284565, now seen corresponding path program 7 times [2024-06-03 20:13:23,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:23,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188777386] [2024-06-03 20:13:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:24,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:24,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188777386] [2024-06-03 20:13:24,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188777386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:24,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:24,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:24,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831845198] [2024-06-03 20:13:24,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:24,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:24,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 535 transitions, 7241 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:24,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:24,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:24,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:26,430 INFO L124 PetriNetUnfolderBase]: 4207/6717 cut-off events. [2024-06-03 20:13:26,430 INFO L125 PetriNetUnfolderBase]: For 763344/763344 co-relation queries the response was YES. [2024-06-03 20:13:26,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59418 conditions, 6717 events. 4207/6717 cut-off events. For 763344/763344 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 43013 event pairs, 817 based on Foata normal form. 6/6719 useless extension candidates. Maximal degree in co-relation 59232. Up to 6337 conditions per place. [2024-06-03 20:13:26,533 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 512 selfloop transitions, 44 changer transitions 0/561 dead transitions. [2024-06-03 20:13:26,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 561 transitions, 8716 flow [2024-06-03 20:13:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:13:26,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:13:26,534 INFO L175 Difference]: Start difference. First operand has 387 places, 535 transitions, 7241 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:13:26,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 561 transitions, 8716 flow [2024-06-03 20:13:28,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 561 transitions, 8552 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:28,480 INFO L231 Difference]: Finished difference. Result has 391 places, 547 transitions, 7511 flow [2024-06-03 20:13:28,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7079, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7511, PETRI_PLACES=391, PETRI_TRANSITIONS=547} [2024-06-03 20:13:28,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-03 20:13:28,480 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 547 transitions, 7511 flow [2024-06-03 20:13:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:28,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:28,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:28,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:13:28,481 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)] === [2024-06-03 20:13:28,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash 969383415, now seen corresponding path program 8 times [2024-06-03 20:13:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519438586] [2024-06-03 20:13:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:29,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:29,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519438586] [2024-06-03 20:13:29,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519438586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:29,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:29,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:29,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709645548] [2024-06-03 20:13:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:29,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:29,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:29,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:29,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:29,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 547 transitions, 7511 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:29,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:29,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:31,220 INFO L124 PetriNetUnfolderBase]: 4237/6765 cut-off events. [2024-06-03 20:13:31,220 INFO L125 PetriNetUnfolderBase]: For 769715/769715 co-relation queries the response was YES. [2024-06-03 20:13:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60416 conditions, 6765 events. 4237/6765 cut-off events. For 769715/769715 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 43353 event pairs, 800 based on Foata normal form. 6/6769 useless extension candidates. Maximal degree in co-relation 60228. Up to 6033 conditions per place. [2024-06-03 20:13:31,333 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 454 selfloop transitions, 116 changer transitions 0/575 dead transitions. [2024-06-03 20:13:31,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 575 transitions, 9072 flow [2024-06-03 20:13:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:13:31,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 20:13:31,334 INFO L175 Difference]: Start difference. First operand has 391 places, 547 transitions, 7511 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:13:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 575 transitions, 9072 flow [2024-06-03 20:13:33,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 575 transitions, 8772 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:33,900 INFO L231 Difference]: Finished difference. Result has 394 places, 554 transitions, 7702 flow [2024-06-03 20:13:33,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7211, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7702, PETRI_PLACES=394, PETRI_TRANSITIONS=554} [2024-06-03 20:13:33,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-03 20:13:33,900 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 554 transitions, 7702 flow [2024-06-03 20:13:33,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:33,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:33,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:33,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:13:33,901 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)] === [2024-06-03 20:13:33,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash 969205785, now seen corresponding path program 9 times [2024-06-03 20:13:33,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:33,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107215818] [2024-06-03 20:13:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:33,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:34,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107215818] [2024-06-03 20:13:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107215818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:34,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:34,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113575293] [2024-06-03 20:13:34,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:34,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:34,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:34,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:34,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 554 transitions, 7702 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:34,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:34,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:34,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:36,566 INFO L124 PetriNetUnfolderBase]: 4261/6779 cut-off events. [2024-06-03 20:13:36,567 INFO L125 PetriNetUnfolderBase]: For 780518/780518 co-relation queries the response was YES. [2024-06-03 20:13:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61548 conditions, 6779 events. 4261/6779 cut-off events. For 780518/780518 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 43328 event pairs, 788 based on Foata normal form. 4/6781 useless extension candidates. Maximal degree in co-relation 61359. Up to 6090 conditions per place. [2024-06-03 20:13:36,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 479 selfloop transitions, 106 changer transitions 0/590 dead transitions. [2024-06-03 20:13:36,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 590 transitions, 9879 flow [2024-06-03 20:13:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 20:13:36,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-03 20:13:36,681 INFO L175 Difference]: Start difference. First operand has 394 places, 554 transitions, 7702 flow. Second operand 8 states and 163 transitions. [2024-06-03 20:13:36,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 590 transitions, 9879 flow [2024-06-03 20:13:38,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 590 transitions, 9438 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:38,992 INFO L231 Difference]: Finished difference. Result has 397 places, 559 transitions, 7724 flow [2024-06-03 20:13:38,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7269, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7724, PETRI_PLACES=397, PETRI_TRANSITIONS=559} [2024-06-03 20:13:38,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-03 20:13:38,993 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 559 transitions, 7724 flow [2024-06-03 20:13:38,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:38,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:38,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:38,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:13:38,993 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)] === [2024-06-03 20:13:38,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 969210435, now seen corresponding path program 10 times [2024-06-03 20:13:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:38,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620220938] [2024-06-03 20:13:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:39,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:39,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620220938] [2024-06-03 20:13:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620220938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:39,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:39,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923160716] [2024-06-03 20:13:39,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:39,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:39,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:40,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:40,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 559 transitions, 7724 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:40,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:40,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:40,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:41,736 INFO L124 PetriNetUnfolderBase]: 4283/6820 cut-off events. [2024-06-03 20:13:41,736 INFO L125 PetriNetUnfolderBase]: For 800473/800473 co-relation queries the response was YES. [2024-06-03 20:13:41,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61913 conditions, 6820 events. 4283/6820 cut-off events. For 800473/800473 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43645 event pairs, 789 based on Foata normal form. 6/6824 useless extension candidates. Maximal degree in co-relation 61722. Up to 6098 conditions per place. [2024-06-03 20:13:41,844 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 463 selfloop transitions, 121 changer transitions 0/589 dead transitions. [2024-06-03 20:13:41,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 589 transitions, 9328 flow [2024-06-03 20:13:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 20:13:41,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-03 20:13:41,845 INFO L175 Difference]: Start difference. First operand has 397 places, 559 transitions, 7724 flow. Second operand 8 states and 158 transitions. [2024-06-03 20:13:41,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 589 transitions, 9328 flow [2024-06-03 20:13:44,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 589 transitions, 8856 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:44,621 INFO L231 Difference]: Finished difference. Result has 399 places, 566 transitions, 7791 flow [2024-06-03 20:13:44,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7280, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=399, PETRI_TRANSITIONS=566} [2024-06-03 20:13:44,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-03 20:13:44,622 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 566 transitions, 7791 flow [2024-06-03 20:13:44,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:44,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:44,622 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] [2024-06-03 20:13:44,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:13:44,623 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)] === [2024-06-03 20:13:44,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2100260401, now seen corresponding path program 1 times [2024-06-03 20:13:44,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:44,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004526215] [2024-06-03 20:13:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:45,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004526215] [2024-06-03 20:13:45,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004526215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:45,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:45,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:45,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998132589] [2024-06-03 20:13:45,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:45,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:45,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:45,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 566 transitions, 7791 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:45,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:45,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:47,358 INFO L124 PetriNetUnfolderBase]: 4362/6933 cut-off events. [2024-06-03 20:13:47,358 INFO L125 PetriNetUnfolderBase]: For 849469/849469 co-relation queries the response was YES. [2024-06-03 20:13:47,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63967 conditions, 6933 events. 4362/6933 cut-off events. For 849469/849469 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44270 event pairs, 814 based on Foata normal form. 3/6935 useless extension candidates. Maximal degree in co-relation 63777. Up to 6440 conditions per place. [2024-06-03 20:13:47,470 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 520 selfloop transitions, 96 changer transitions 0/621 dead transitions. [2024-06-03 20:13:47,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 621 transitions, 10027 flow [2024-06-03 20:13:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:13:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:13:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 20:13:47,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 20:13:47,472 INFO L175 Difference]: Start difference. First operand has 399 places, 566 transitions, 7791 flow. Second operand 10 states and 196 transitions. [2024-06-03 20:13:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 621 transitions, 10027 flow [2024-06-03 20:13:50,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 621 transitions, 9582 flow, removed 106 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:50,076 INFO L231 Difference]: Finished difference. Result has 404 places, 588 transitions, 8271 flow [2024-06-03 20:13:50,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8271, PETRI_PLACES=404, PETRI_TRANSITIONS=588} [2024-06-03 20:13:50,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-03 20:13:50,077 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 588 transitions, 8271 flow [2024-06-03 20:13:50,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:50,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:50,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:50,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:13:50,077 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)] === [2024-06-03 20:13:50,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash 376540879, now seen corresponding path program 2 times [2024-06-03 20:13:50,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:50,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75405543] [2024-06-03 20:13:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:50,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:50,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75405543] [2024-06-03 20:13:50,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75405543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:50,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:50,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768233468] [2024-06-03 20:13:50,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:51,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:51,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 588 transitions, 8271 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:51,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:51,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:51,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:52,994 INFO L124 PetriNetUnfolderBase]: 4367/6944 cut-off events. [2024-06-03 20:13:52,994 INFO L125 PetriNetUnfolderBase]: For 858024/858024 co-relation queries the response was YES. [2024-06-03 20:13:53,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64444 conditions, 6944 events. 4367/6944 cut-off events. For 858024/858024 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44321 event pairs, 828 based on Foata normal form. 1/6944 useless extension candidates. Maximal degree in co-relation 64252. Up to 6611 conditions per place. [2024-06-03 20:13:53,118 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 562 selfloop transitions, 47 changer transitions 0/614 dead transitions. [2024-06-03 20:13:53,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 614 transitions, 9871 flow [2024-06-03 20:13:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:13:53,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:13:53,144 INFO L175 Difference]: Start difference. First operand has 404 places, 588 transitions, 8271 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:13:53,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 614 transitions, 9871 flow [2024-06-03 20:13:56,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 614 transitions, 9510 flow, removed 136 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:56,368 INFO L231 Difference]: Finished difference. Result has 409 places, 593 transitions, 8150 flow [2024-06-03 20:13:56,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7914, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8150, PETRI_PLACES=409, PETRI_TRANSITIONS=593} [2024-06-03 20:13:56,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-03 20:13:56,369 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 593 transitions, 8150 flow [2024-06-03 20:13:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:56,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:56,369 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] [2024-06-03 20:13:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:13:56,370 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)] === [2024-06-03 20:13:56,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1684633933, now seen corresponding path program 3 times [2024-06-03 20:13:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:56,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269467853] [2024-06-03 20:13:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:57,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269467853] [2024-06-03 20:13:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269467853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683428890] [2024-06-03 20:13:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:57,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:13:57,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 593 transitions, 8150 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:57,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:57,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:13:57,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:59,037 INFO L124 PetriNetUnfolderBase]: 4372/6959 cut-off events. [2024-06-03 20:13:59,037 INFO L125 PetriNetUnfolderBase]: For 871875/871875 co-relation queries the response was YES. [2024-06-03 20:13:59,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64483 conditions, 6959 events. 4372/6959 cut-off events. For 871875/871875 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 44469 event pairs, 833 based on Foata normal form. 1/6959 useless extension candidates. Maximal degree in co-relation 64287. Up to 6643 conditions per place. [2024-06-03 20:13:59,152 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 36 changer transitions 0/615 dead transitions. [2024-06-03 20:13:59,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 615 transitions, 9559 flow [2024-06-03 20:13:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:13:59,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 20:13:59,153 INFO L175 Difference]: Start difference. First operand has 409 places, 593 transitions, 8150 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:13:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 615 transitions, 9559 flow [2024-06-03 20:14:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 615 transitions, 9408 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:02,426 INFO L231 Difference]: Finished difference. Result has 415 places, 599 transitions, 8246 flow [2024-06-03 20:14:02,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8246, PETRI_PLACES=415, PETRI_TRANSITIONS=599} [2024-06-03 20:14:02,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-03 20:14:02,427 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 599 transitions, 8246 flow [2024-06-03 20:14:02,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:02,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:02,427 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] [2024-06-03 20:14:02,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:14:02,427 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)] === [2024-06-03 20:14:02,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash -137459289, now seen corresponding path program 4 times [2024-06-03 20:14:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517215402] [2024-06-03 20:14:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:03,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517215402] [2024-06-03 20:14:03,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517215402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:03,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:03,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:03,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441003996] [2024-06-03 20:14:03,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:03,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:03,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:03,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 599 transitions, 8246 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:03,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:03,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:03,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:05,268 INFO L124 PetriNetUnfolderBase]: 4449/7059 cut-off events. [2024-06-03 20:14:05,268 INFO L125 PetriNetUnfolderBase]: For 938034/938034 co-relation queries the response was YES. [2024-06-03 20:14:05,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66841 conditions, 7059 events. 4449/7059 cut-off events. For 938034/938034 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 45055 event pairs, 759 based on Foata normal form. 1/7058 useless extension candidates. Maximal degree in co-relation 66643. Up to 6309 conditions per place. [2024-06-03 20:14:05,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 504 selfloop transitions, 152 changer transitions 0/661 dead transitions. [2024-06-03 20:14:05,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 661 transitions, 11164 flow [2024-06-03 20:14:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 20:14:05,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 20:14:05,398 INFO L175 Difference]: Start difference. First operand has 415 places, 599 transitions, 8246 flow. Second operand 9 states and 182 transitions. [2024-06-03 20:14:05,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 661 transitions, 11164 flow [2024-06-03 20:14:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 661 transitions, 11008 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:09,047 INFO L231 Difference]: Finished difference. Result has 422 places, 628 transitions, 9148 flow [2024-06-03 20:14:09,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9148, PETRI_PLACES=422, PETRI_TRANSITIONS=628} [2024-06-03 20:14:09,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-03 20:14:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 628 transitions, 9148 flow [2024-06-03 20:14:09,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:09,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:09,048 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] [2024-06-03 20:14:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:14:09,048 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)] === [2024-06-03 20:14:09,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash 825951597, now seen corresponding path program 5 times [2024-06-03 20:14:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:09,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447630947] [2024-06-03 20:14:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447630947] [2024-06-03 20:14:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447630947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:10,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32101225] [2024-06-03 20:14:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:10,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:10,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 628 transitions, 9148 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:10,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:10,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:10,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:12,241 INFO L124 PetriNetUnfolderBase]: 4451/7064 cut-off events. [2024-06-03 20:14:12,242 INFO L125 PetriNetUnfolderBase]: For 953527/953527 co-relation queries the response was YES. [2024-06-03 20:14:12,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67761 conditions, 7064 events. 4451/7064 cut-off events. For 953527/953527 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45087 event pairs, 762 based on Foata normal form. 2/7064 useless extension candidates. Maximal degree in co-relation 67559. Up to 6055 conditions per place. [2024-06-03 20:14:12,346 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 465 selfloop transitions, 188 changer transitions 0/658 dead transitions. [2024-06-03 20:14:12,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 658 transitions, 10779 flow [2024-06-03 20:14:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 20:14:12,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-03 20:14:12,348 INFO L175 Difference]: Start difference. First operand has 422 places, 628 transitions, 9148 flow. Second operand 9 states and 176 transitions. [2024-06-03 20:14:12,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 658 transitions, 10779 flow [2024-06-03 20:14:15,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 658 transitions, 10503 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:15,548 INFO L231 Difference]: Finished difference. Result has 427 places, 631 transitions, 9408 flow [2024-06-03 20:14:15,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8890, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9408, PETRI_PLACES=427, PETRI_TRANSITIONS=631} [2024-06-03 20:14:15,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-03 20:14:15,549 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 631 transitions, 9408 flow [2024-06-03 20:14:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:15,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:15,549 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] [2024-06-03 20:14:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:14:15,549 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)] === [2024-06-03 20:14:15,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 829670667, now seen corresponding path program 6 times [2024-06-03 20:14:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:15,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945351805] [2024-06-03 20:14:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:16,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:16,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945351805] [2024-06-03 20:14:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945351805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:16,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:16,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852424147] [2024-06-03 20:14:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:16,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:16,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:16,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:16,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 631 transitions, 9408 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:16,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:16,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:18,607 INFO L124 PetriNetUnfolderBase]: 4461/7080 cut-off events. [2024-06-03 20:14:18,607 INFO L125 PetriNetUnfolderBase]: For 980244/980244 co-relation queries the response was YES. [2024-06-03 20:14:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68580 conditions, 7080 events. 4461/7080 cut-off events. For 980244/980244 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 45223 event pairs, 764 based on Foata normal form. 2/7080 useless extension candidates. Maximal degree in co-relation 68378. Up to 6551 conditions per place. [2024-06-03 20:14:18,731 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 566 selfloop transitions, 88 changer transitions 0/659 dead transitions. [2024-06-03 20:14:18,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 659 transitions, 10997 flow [2024-06-03 20:14:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:14:18,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 20:14:18,732 INFO L175 Difference]: Start difference. First operand has 427 places, 631 transitions, 9408 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:14:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 659 transitions, 10997 flow [2024-06-03 20:14:22,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 659 transitions, 10457 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:22,062 INFO L231 Difference]: Finished difference. Result has 429 places, 637 transitions, 9228 flow [2024-06-03 20:14:22,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8868, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9228, PETRI_PLACES=429, PETRI_TRANSITIONS=637} [2024-06-03 20:14:22,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-03 20:14:22,062 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 637 transitions, 9228 flow [2024-06-03 20:14:22,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:22,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:22,063 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] [2024-06-03 20:14:22,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:14:22,063 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)] === [2024-06-03 20:14:22,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash 472542475, now seen corresponding path program 7 times [2024-06-03 20:14:22,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:22,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804024661] [2024-06-03 20:14:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:22,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:22,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:22,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804024661] [2024-06-03 20:14:22,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804024661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:22,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:22,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383082734] [2024-06-03 20:14:22,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:22,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:22,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:23,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:23,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 637 transitions, 9228 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:23,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:23,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:23,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:24,969 INFO L124 PetriNetUnfolderBase]: 4546/7216 cut-off events. [2024-06-03 20:14:24,970 INFO L125 PetriNetUnfolderBase]: For 1048992/1048992 co-relation queries the response was YES. [2024-06-03 20:14:25,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70822 conditions, 7216 events. 4546/7216 cut-off events. For 1048992/1048992 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46267 event pairs, 748 based on Foata normal form. 1/7215 useless extension candidates. Maximal degree in co-relation 70619. Up to 6026 conditions per place. [2024-06-03 20:14:25,094 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 231 changer transitions 0/690 dead transitions. [2024-06-03 20:14:25,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 690 transitions, 12214 flow [2024-06-03 20:14:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 20:14:25,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 20:14:25,096 INFO L175 Difference]: Start difference. First operand has 429 places, 637 transitions, 9228 flow. Second operand 9 states and 182 transitions. [2024-06-03 20:14:25,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 690 transitions, 12214 flow [2024-06-03 20:14:28,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 690 transitions, 11930 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:28,620 INFO L231 Difference]: Finished difference. Result has 433 places, 656 transitions, 10147 flow [2024-06-03 20:14:28,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10147, PETRI_PLACES=433, PETRI_TRANSITIONS=656} [2024-06-03 20:14:28,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-03 20:14:28,620 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 656 transitions, 10147 flow [2024-06-03 20:14:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:28,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:28,621 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] [2024-06-03 20:14:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:14:28,621 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)] === [2024-06-03 20:14:28,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1751917871, now seen corresponding path program 8 times [2024-06-03 20:14:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:28,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436472542] [2024-06-03 20:14:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:29,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436472542] [2024-06-03 20:14:29,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436472542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:29,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:29,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092693235] [2024-06-03 20:14:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:29,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:29,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 656 transitions, 10147 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:29,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:29,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:31,781 INFO L124 PetriNetUnfolderBase]: 4609/7292 cut-off events. [2024-06-03 20:14:31,781 INFO L125 PetriNetUnfolderBase]: For 1126010/1126010 co-relation queries the response was YES. [2024-06-03 20:14:31,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74199 conditions, 7292 events. 4609/7292 cut-off events. For 1126010/1126010 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 46543 event pairs, 746 based on Foata normal form. 3/7293 useless extension candidates. Maximal degree in co-relation 73993. Up to 6169 conditions per place. [2024-06-03 20:14:31,911 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 490 selfloop transitions, 212 changer transitions 0/707 dead transitions. [2024-06-03 20:14:31,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 707 transitions, 12601 flow [2024-06-03 20:14:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:14:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:14:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 20:14:31,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-03 20:14:31,913 INFO L175 Difference]: Start difference. First operand has 433 places, 656 transitions, 10147 flow. Second operand 10 states and 197 transitions. [2024-06-03 20:14:31,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 707 transitions, 12601 flow [2024-06-03 20:14:36,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 707 transitions, 12154 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:36,709 INFO L231 Difference]: Finished difference. Result has 439 places, 673 transitions, 10808 flow [2024-06-03 20:14:36,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9715, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10808, PETRI_PLACES=439, PETRI_TRANSITIONS=673} [2024-06-03 20:14:36,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 20:14:36,709 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 673 transitions, 10808 flow [2024-06-03 20:14:36,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:36,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:36,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:36,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:14:36,710 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)] === [2024-06-03 20:14:36,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash -478398041, now seen corresponding path program 9 times [2024-06-03 20:14:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:36,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841688520] [2024-06-03 20:14:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841688520] [2024-06-03 20:14:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841688520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496680268] [2024-06-03 20:14:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:37,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:37,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:37,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 673 transitions, 10808 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:37,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:37,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:37,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:39,943 INFO L124 PetriNetUnfolderBase]: 4596/7277 cut-off events. [2024-06-03 20:14:39,944 INFO L125 PetriNetUnfolderBase]: For 1135621/1135621 co-relation queries the response was YES. [2024-06-03 20:14:40,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74425 conditions, 7277 events. 4596/7277 cut-off events. For 1135621/1135621 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 46547 event pairs, 747 based on Foata normal form. 3/7278 useless extension candidates. Maximal degree in co-relation 74217. Up to 6098 conditions per place. [2024-06-03 20:14:40,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 222 changer transitions 0/704 dead transitions. [2024-06-03 20:14:40,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 704 transitions, 13060 flow [2024-06-03 20:14:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 20:14:40,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:14:40,063 INFO L175 Difference]: Start difference. First operand has 439 places, 673 transitions, 10808 flow. Second operand 9 states and 180 transitions. [2024-06-03 20:14:40,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 704 transitions, 13060 flow [2024-06-03 20:14:44,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 704 transitions, 12248 flow, removed 212 selfloop flow, removed 9 redundant places. [2024-06-03 20:14:44,387 INFO L231 Difference]: Finished difference. Result has 439 places, 673 transitions, 10460 flow [2024-06-03 20:14:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10008, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10460, PETRI_PLACES=439, PETRI_TRANSITIONS=673} [2024-06-03 20:14:44,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 20:14:44,388 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 673 transitions, 10460 flow [2024-06-03 20:14:44,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:44,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:44,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:14:44,389 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)] === [2024-06-03 20:14:44,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash -500276157, now seen corresponding path program 10 times [2024-06-03 20:14:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:44,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266699118] [2024-06-03 20:14:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:45,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:45,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266699118] [2024-06-03 20:14:45,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266699118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:45,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:45,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193199914] [2024-06-03 20:14:45,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:45,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:45,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:45,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 673 transitions, 10460 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:45,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:45,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:45,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:47,563 INFO L124 PetriNetUnfolderBase]: 4602/7281 cut-off events. [2024-06-03 20:14:47,563 INFO L125 PetriNetUnfolderBase]: For 1142740/1142740 co-relation queries the response was YES. [2024-06-03 20:14:47,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74031 conditions, 7281 events. 4602/7281 cut-off events. For 1142740/1142740 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 46512 event pairs, 752 based on Foata normal form. 6/7285 useless extension candidates. Maximal degree in co-relation 73824. Up to 6248 conditions per place. [2024-06-03 20:14:47,694 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 520 selfloop transitions, 179 changer transitions 0/704 dead transitions. [2024-06-03 20:14:47,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 704 transitions, 12210 flow [2024-06-03 20:14:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 20:14:47,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-03 20:14:47,695 INFO L175 Difference]: Start difference. First operand has 439 places, 673 transitions, 10460 flow. Second operand 9 states and 176 transitions. [2024-06-03 20:14:47,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 704 transitions, 12210 flow [2024-06-03 20:14:51,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 704 transitions, 11768 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:51,098 INFO L231 Difference]: Finished difference. Result has 442 places, 677 transitions, 10538 flow [2024-06-03 20:14:51,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10028, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10538, PETRI_PLACES=442, PETRI_TRANSITIONS=677} [2024-06-03 20:14:51,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 20:14:51,099 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 677 transitions, 10538 flow [2024-06-03 20:14:51,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:51,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:51,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:51,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:14:51,100 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)] === [2024-06-03 20:14:51,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash -500267787, now seen corresponding path program 11 times [2024-06-03 20:14:51,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:51,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050215542] [2024-06-03 20:14:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:52,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050215542] [2024-06-03 20:14:52,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050215542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:52,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:52,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468884366] [2024-06-03 20:14:52,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:52,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:52,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:52,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 677 transitions, 10538 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:52,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:52,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:54,367 INFO L124 PetriNetUnfolderBase]: 4615/7305 cut-off events. [2024-06-03 20:14:54,367 INFO L125 PetriNetUnfolderBase]: For 1136587/1136587 co-relation queries the response was YES. [2024-06-03 20:14:54,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74074 conditions, 7305 events. 4615/7305 cut-off events. For 1136587/1136587 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 46654 event pairs, 746 based on Foata normal form. 3/7306 useless extension candidates. Maximal degree in co-relation 73866. Up to 6171 conditions per place. [2024-06-03 20:14:54,498 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 500 selfloop transitions, 211 changer transitions 0/716 dead transitions. [2024-06-03 20:14:54,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 716 transitions, 12578 flow [2024-06-03 20:14:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:14:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:14:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 20:14:54,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:14:54,500 INFO L175 Difference]: Start difference. First operand has 442 places, 677 transitions, 10538 flow. Second operand 10 states and 195 transitions. [2024-06-03 20:14:54,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 716 transitions, 12578 flow [2024-06-03 20:14:58,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 716 transitions, 12020 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:58,904 INFO L231 Difference]: Finished difference. Result has 446 places, 684 transitions, 10621 flow [2024-06-03 20:14:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9980, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10621, PETRI_PLACES=446, PETRI_TRANSITIONS=684} [2024-06-03 20:14:58,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-03 20:14:58,905 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 684 transitions, 10621 flow [2024-06-03 20:14:58,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:58,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:58,905 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] [2024-06-03 20:14:58,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:14:58,905 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)] === [2024-06-03 20:14:58,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1121218137, now seen corresponding path program 12 times [2024-06-03 20:14:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507444972] [2024-06-03 20:14:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:00,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:00,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507444972] [2024-06-03 20:15:00,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507444972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:00,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:00,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109633580] [2024-06-03 20:15:00,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:00,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:00,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:00,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 684 transitions, 10621 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:00,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:00,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:00,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:02,202 INFO L124 PetriNetUnfolderBase]: 4613/7311 cut-off events. [2024-06-03 20:15:02,202 INFO L125 PetriNetUnfolderBase]: For 1159095/1159095 co-relation queries the response was YES. [2024-06-03 20:15:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74207 conditions, 7311 events. 4613/7311 cut-off events. For 1159095/1159095 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 46771 event pairs, 765 based on Foata normal form. 6/7315 useless extension candidates. Maximal degree in co-relation 73997. Up to 6619 conditions per place. [2024-06-03 20:15:02,328 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 594 selfloop transitions, 114 changer transitions 0/713 dead transitions. [2024-06-03 20:15:02,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 713 transitions, 12293 flow [2024-06-03 20:15:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-03 20:15:02,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-03 20:15:02,330 INFO L175 Difference]: Start difference. First operand has 446 places, 684 transitions, 10621 flow. Second operand 11 states and 206 transitions. [2024-06-03 20:15:02,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 713 transitions, 12293 flow [2024-06-03 20:15:06,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 713 transitions, 11880 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:06,761 INFO L231 Difference]: Finished difference. Result has 450 places, 687 transitions, 10525 flow [2024-06-03 20:15:06,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10208, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10525, PETRI_PLACES=450, PETRI_TRANSITIONS=687} [2024-06-03 20:15:06,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-03 20:15:06,762 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 687 transitions, 10525 flow [2024-06-03 20:15:06,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:06,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:06,763 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] [2024-06-03 20:15:06,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:15:06,763 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)] === [2024-06-03 20:15:06,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1112943927, now seen corresponding path program 13 times [2024-06-03 20:15:06,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:06,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444366784] [2024-06-03 20:15:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:07,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444366784] [2024-06-03 20:15:07,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444366784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:07,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:07,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311202826] [2024-06-03 20:15:07,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:07,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:07,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:07,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:07,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 687 transitions, 10525 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:07,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:07,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:07,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:10,122 INFO L124 PetriNetUnfolderBase]: 4595/7277 cut-off events. [2024-06-03 20:15:10,122 INFO L125 PetriNetUnfolderBase]: For 1132283/1132283 co-relation queries the response was YES. [2024-06-03 20:15:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72992 conditions, 7277 events. 4595/7277 cut-off events. For 1132283/1132283 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46490 event pairs, 770 based on Foata normal form. 6/7281 useless extension candidates. Maximal degree in co-relation 72781. Up to 6595 conditions per place. [2024-06-03 20:15:10,249 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 595 selfloop transitions, 107 changer transitions 0/707 dead transitions. [2024-06-03 20:15:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 707 transitions, 12060 flow [2024-06-03 20:15:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:15:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:15:10,251 INFO L175 Difference]: Start difference. First operand has 450 places, 687 transitions, 10525 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:15:10,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 707 transitions, 12060 flow [2024-06-03 20:15:15,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 707 transitions, 11651 flow, removed 78 selfloop flow, removed 10 redundant places. [2024-06-03 20:15:15,245 INFO L231 Difference]: Finished difference. Result has 449 places, 687 transitions, 10341 flow [2024-06-03 20:15:15,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10116, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10341, PETRI_PLACES=449, PETRI_TRANSITIONS=687} [2024-06-03 20:15:15,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-03 20:15:15,245 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 687 transitions, 10341 flow [2024-06-03 20:15:15,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:15,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:15,246 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] [2024-06-03 20:15:15,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:15:15,246 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)] === [2024-06-03 20:15:15,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1112647257, now seen corresponding path program 14 times [2024-06-03 20:15:15,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:15,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908563946] [2024-06-03 20:15:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:15,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:16,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908563946] [2024-06-03 20:15:16,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908563946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:16,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:16,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356128197] [2024-06-03 20:15:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:16,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:16,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 687 transitions, 10341 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:16,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:16,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:16,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:18,374 INFO L124 PetriNetUnfolderBase]: 4582/7259 cut-off events. [2024-06-03 20:15:18,375 INFO L125 PetriNetUnfolderBase]: For 1108741/1108741 co-relation queries the response was YES. [2024-06-03 20:15:18,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72249 conditions, 7259 events. 4582/7259 cut-off events. For 1108741/1108741 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46417 event pairs, 769 based on Foata normal form. 3/7260 useless extension candidates. Maximal degree in co-relation 72038. Up to 6439 conditions per place. [2024-06-03 20:15:18,496 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 560 selfloop transitions, 145 changer transitions 0/710 dead transitions. [2024-06-03 20:15:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 710 transitions, 12132 flow [2024-06-03 20:15:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 20:15:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-03 20:15:18,498 INFO L175 Difference]: Start difference. First operand has 449 places, 687 transitions, 10341 flow. Second operand 10 states and 191 transitions. [2024-06-03 20:15:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 710 transitions, 12132 flow [2024-06-03 20:15:23,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 710 transitions, 11863 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:23,023 INFO L231 Difference]: Finished difference. Result has 453 places, 687 transitions, 10381 flow [2024-06-03 20:15:23,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10072, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10381, PETRI_PLACES=453, PETRI_TRANSITIONS=687} [2024-06-03 20:15:23,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-03 20:15:23,023 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 687 transitions, 10381 flow [2024-06-03 20:15:23,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:23,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:23,024 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] [2024-06-03 20:15:23,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:15:23,024 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)] === [2024-06-03 20:15:23,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1187161241, now seen corresponding path program 15 times [2024-06-03 20:15:23,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:23,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007530597] [2024-06-03 20:15:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:23,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:24,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:24,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007530597] [2024-06-03 20:15:24,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007530597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980042563] [2024-06-03 20:15:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:24,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:24,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:24,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 687 transitions, 10381 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:24,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:24,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:24,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:26,312 INFO L124 PetriNetUnfolderBase]: 4634/7334 cut-off events. [2024-06-03 20:15:26,313 INFO L125 PetriNetUnfolderBase]: For 1158351/1158351 co-relation queries the response was YES. [2024-06-03 20:15:26,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73364 conditions, 7334 events. 4634/7334 cut-off events. For 1158351/1158351 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46944 event pairs, 808 based on Foata normal form. 9/7339 useless extension candidates. Maximal degree in co-relation 73152. Up to 6187 conditions per place. [2024-06-03 20:15:26,444 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 518 selfloop transitions, 222 changer transitions 0/745 dead transitions. [2024-06-03 20:15:26,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 745 transitions, 13148 flow [2024-06-03 20:15:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 20:15:26,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-03 20:15:26,445 INFO L175 Difference]: Start difference. First operand has 453 places, 687 transitions, 10381 flow. Second operand 9 states and 191 transitions. [2024-06-03 20:15:26,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 745 transitions, 13148 flow [2024-06-03 20:15:31,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 745 transitions, 12667 flow, removed 123 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:31,310 INFO L231 Difference]: Finished difference. Result has 457 places, 704 transitions, 11129 flow [2024-06-03 20:15:31,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9904, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11129, PETRI_PLACES=457, PETRI_TRANSITIONS=704} [2024-06-03 20:15:31,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-03 20:15:31,311 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 704 transitions, 11129 flow [2024-06-03 20:15:31,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:31,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:31,311 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] [2024-06-03 20:15:31,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:15:31,311 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)] === [2024-06-03 20:15:31,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash -27975955, now seen corresponding path program 16 times [2024-06-03 20:15:31,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:31,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503045585] [2024-06-03 20:15:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:31,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:32,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:32,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503045585] [2024-06-03 20:15:32,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503045585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:32,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:32,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:32,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213497368] [2024-06-03 20:15:32,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:32,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:32,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:32,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:32,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 704 transitions, 11129 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:32,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:32,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:32,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:34,232 INFO L124 PetriNetUnfolderBase]: 4624/7304 cut-off events. [2024-06-03 20:15:34,232 INFO L125 PetriNetUnfolderBase]: For 1111931/1111931 co-relation queries the response was YES. [2024-06-03 20:15:34,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74148 conditions, 7304 events. 4624/7304 cut-off events. For 1111931/1111931 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46647 event pairs, 825 based on Foata normal form. 4/7306 useless extension candidates. Maximal degree in co-relation 73933. Up to 6728 conditions per place. [2024-06-03 20:15:34,360 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 626 selfloop transitions, 103 changer transitions 0/734 dead transitions. [2024-06-03 20:15:34,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 734 transitions, 13417 flow [2024-06-03 20:15:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 20:15:34,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-03 20:15:34,361 INFO L175 Difference]: Start difference. First operand has 457 places, 704 transitions, 11129 flow. Second operand 8 states and 167 transitions. [2024-06-03 20:15:34,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 734 transitions, 13417 flow [2024-06-03 20:15:39,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 734 transitions, 13059 flow, removed 157 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:39,011 INFO L231 Difference]: Finished difference. Result has 460 places, 704 transitions, 11004 flow [2024-06-03 20:15:39,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10783, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11004, PETRI_PLACES=460, PETRI_TRANSITIONS=704} [2024-06-03 20:15:39,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-03 20:15:39,012 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 704 transitions, 11004 flow [2024-06-03 20:15:39,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:39,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:39,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:39,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:15:39,013 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)] === [2024-06-03 20:15:39,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1745545905, now seen corresponding path program 1 times [2024-06-03 20:15:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:39,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980055404] [2024-06-03 20:15:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:39,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:39,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980055404] [2024-06-03 20:15:39,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980055404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:39,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:39,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:39,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052823194] [2024-06-03 20:15:39,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:39,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:39,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:39,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 704 transitions, 11004 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:39,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:39,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:41,842 INFO L124 PetriNetUnfolderBase]: 4626/7332 cut-off events. [2024-06-03 20:15:41,843 INFO L125 PetriNetUnfolderBase]: For 1071574/1071574 co-relation queries the response was YES. [2024-06-03 20:15:41,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73768 conditions, 7332 events. 4626/7332 cut-off events. For 1071574/1071574 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46899 event pairs, 858 based on Foata normal form. 2/7333 useless extension candidates. Maximal degree in co-relation 73553. Up to 6885 conditions per place. [2024-06-03 20:15:41,975 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 652 selfloop transitions, 68 changer transitions 0/725 dead transitions. [2024-06-03 20:15:41,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 725 transitions, 12626 flow [2024-06-03 20:15:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:15:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:15:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 20:15:41,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-03 20:15:41,976 INFO L175 Difference]: Start difference. First operand has 460 places, 704 transitions, 11004 flow. Second operand 6 states and 127 transitions. [2024-06-03 20:15:41,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 725 transitions, 12626 flow [2024-06-03 20:15:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 725 transitions, 12488 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:46,026 INFO L231 Difference]: Finished difference. Result has 461 places, 707 transitions, 11175 flow [2024-06-03 20:15:46,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10866, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11175, PETRI_PLACES=461, PETRI_TRANSITIONS=707} [2024-06-03 20:15:46,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-03 20:15:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 707 transitions, 11175 flow [2024-06-03 20:15:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:46,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:46,027 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] [2024-06-03 20:15:46,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:15:46,028 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)] === [2024-06-03 20:15:46,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1282183635, now seen corresponding path program 2 times [2024-06-03 20:15:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:46,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440677213] [2024-06-03 20:15:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:46,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440677213] [2024-06-03 20:15:46,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440677213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:46,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:46,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863408662] [2024-06-03 20:15:46,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:46,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:46,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:46,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 707 transitions, 11175 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:46,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:46,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:46,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:48,818 INFO L124 PetriNetUnfolderBase]: 4620/7308 cut-off events. [2024-06-03 20:15:48,818 INFO L125 PetriNetUnfolderBase]: For 1050431/1050431 co-relation queries the response was YES. [2024-06-03 20:15:48,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73638 conditions, 7308 events. 4620/7308 cut-off events. For 1050431/1050431 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 46696 event pairs, 762 based on Foata normal form. 2/7306 useless extension candidates. Maximal degree in co-relation 73424. Up to 6673 conditions per place. [2024-06-03 20:15:48,948 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 603 selfloop transitions, 119 changer transitions 0/727 dead transitions. [2024-06-03 20:15:48,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 727 transitions, 12815 flow [2024-06-03 20:15:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:15:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:15:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-03 20:15:48,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-06-03 20:15:48,950 INFO L175 Difference]: Start difference. First operand has 461 places, 707 transitions, 11175 flow. Second operand 6 states and 125 transitions. [2024-06-03 20:15:48,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 727 transitions, 12815 flow [2024-06-03 20:15:53,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 727 transitions, 12626 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 20:15:53,497 INFO L231 Difference]: Finished difference. Result has 463 places, 710 transitions, 11394 flow [2024-06-03 20:15:53,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10986, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11394, PETRI_PLACES=463, PETRI_TRANSITIONS=710} [2024-06-03 20:15:53,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-03 20:15:53,498 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 710 transitions, 11394 flow [2024-06-03 20:15:53,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:53,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:53,498 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] [2024-06-03 20:15:53,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:15:53,498 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)] === [2024-06-03 20:15:53,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2139265299, now seen corresponding path program 17 times [2024-06-03 20:15:53,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:53,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009391294] [2024-06-03 20:15:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:53,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:54,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:54,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009391294] [2024-06-03 20:15:54,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009391294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:54,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:54,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584483302] [2024-06-03 20:15:54,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:54,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:54,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 710 transitions, 11394 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:54,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:54,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:54,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:56,485 INFO L124 PetriNetUnfolderBase]: 4614/7316 cut-off events. [2024-06-03 20:15:56,486 INFO L125 PetriNetUnfolderBase]: For 1065802/1065802 co-relation queries the response was YES. [2024-06-03 20:15:56,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73983 conditions, 7316 events. 4614/7316 cut-off events. For 1065802/1065802 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46856 event pairs, 851 based on Foata normal form. 4/7319 useless extension candidates. Maximal degree in co-relation 73768. Up to 6913 conditions per place. [2024-06-03 20:15:56,617 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 674 selfloop transitions, 64 changer transitions 0/743 dead transitions. [2024-06-03 20:15:56,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 743 transitions, 13359 flow [2024-06-03 20:15:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 20:15:56,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-03 20:15:56,618 INFO L175 Difference]: Start difference. First operand has 463 places, 710 transitions, 11394 flow. Second operand 8 states and 165 transitions. [2024-06-03 20:15:56,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 743 transitions, 13359 flow [2024-06-03 20:16:01,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 743 transitions, 13055 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:01,568 INFO L231 Difference]: Finished difference. Result has 468 places, 715 transitions, 11414 flow [2024-06-03 20:16:01,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11090, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11414, PETRI_PLACES=468, PETRI_TRANSITIONS=715} [2024-06-03 20:16:01,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-03 20:16:01,569 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 715 transitions, 11414 flow [2024-06-03 20:16:01,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:01,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:01,570 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] [2024-06-03 20:16:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:16:01,570 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)] === [2024-06-03 20:16:01,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 483059690, now seen corresponding path program 1 times [2024-06-03 20:16:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774606259] [2024-06-03 20:16:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:02,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:02,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774606259] [2024-06-03 20:16:02,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774606259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:02,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:02,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:02,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760517354] [2024-06-03 20:16:02,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:02,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:02,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:02,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:02,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:02,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 715 transitions, 11414 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:02,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:02,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:02,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:04,903 INFO L124 PetriNetUnfolderBase]: 4805/7626 cut-off events. [2024-06-03 20:16:04,903 INFO L125 PetriNetUnfolderBase]: For 1301808/1301808 co-relation queries the response was YES. [2024-06-03 20:16:05,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79583 conditions, 7626 events. 4805/7626 cut-off events. For 1301808/1301808 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49218 event pairs, 720 based on Foata normal form. 16/7640 useless extension candidates. Maximal degree in co-relation 79366. Up to 5733 conditions per place. [2024-06-03 20:16:05,263 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 524 selfloop transitions, 239 changer transitions 0/768 dead transitions. [2024-06-03 20:16:05,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 768 transitions, 14500 flow [2024-06-03 20:16:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-03 20:16:05,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-03 20:16:05,264 INFO L175 Difference]: Start difference. First operand has 468 places, 715 transitions, 11414 flow. Second operand 10 states and 206 transitions. [2024-06-03 20:16:05,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 768 transitions, 14500 flow [2024-06-03 20:16:10,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 768 transitions, 14252 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:10,251 INFO L231 Difference]: Finished difference. Result has 475 places, 720 transitions, 11839 flow [2024-06-03 20:16:10,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11174, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11839, PETRI_PLACES=475, PETRI_TRANSITIONS=720} [2024-06-03 20:16:10,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:16:10,252 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 720 transitions, 11839 flow [2024-06-03 20:16:10,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:10,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:10,252 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] [2024-06-03 20:16:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:16:10,252 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)] === [2024-06-03 20:16:10,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash -478387036, now seen corresponding path program 2 times [2024-06-03 20:16:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020035138] [2024-06-03 20:16:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:11,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020035138] [2024-06-03 20:16:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020035138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:11,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:11,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:11,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059701515] [2024-06-03 20:16:11,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:11,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:11,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:11,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 720 transitions, 11839 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:11,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:11,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:11,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:13,709 INFO L124 PetriNetUnfolderBase]: 5002/7918 cut-off events. [2024-06-03 20:16:13,710 INFO L125 PetriNetUnfolderBase]: For 1482613/1482613 co-relation queries the response was YES. [2024-06-03 20:16:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86624 conditions, 7918 events. 5002/7918 cut-off events. For 1482613/1482613 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 51356 event pairs, 860 based on Foata normal form. 16/7931 useless extension candidates. Maximal degree in co-relation 86405. Up to 6491 conditions per place. [2024-06-03 20:16:13,864 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 234 changer transitions 0/764 dead transitions. [2024-06-03 20:16:13,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 764 transitions, 14573 flow [2024-06-03 20:16:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-03 20:16:13,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:16:13,866 INFO L175 Difference]: Start difference. First operand has 475 places, 720 transitions, 11839 flow. Second operand 10 states and 200 transitions. [2024-06-03 20:16:13,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 764 transitions, 14573 flow [2024-06-03 20:16:19,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 764 transitions, 14208 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:19,139 INFO L231 Difference]: Finished difference. Result has 481 places, 724 transitions, 12121 flow [2024-06-03 20:16:19,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11478, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12121, PETRI_PLACES=481, PETRI_TRANSITIONS=724} [2024-06-03 20:16:19,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-03 20:16:19,139 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 724 transitions, 12121 flow [2024-06-03 20:16:19,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:19,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:19,140 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] [2024-06-03 20:16:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:16:19,140 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)] === [2024-06-03 20:16:19,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash 484937360, now seen corresponding path program 3 times [2024-06-03 20:16:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:19,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992758338] [2024-06-03 20:16:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:19,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992758338] [2024-06-03 20:16:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992758338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:20,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312916412] [2024-06-03 20:16:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:20,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:20,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 724 transitions, 12121 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:20,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:20,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:22,591 INFO L124 PetriNetUnfolderBase]: 5015/7945 cut-off events. [2024-06-03 20:16:22,592 INFO L125 PetriNetUnfolderBase]: For 1462460/1462460 co-relation queries the response was YES. [2024-06-03 20:16:22,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85963 conditions, 7945 events. 5015/7945 cut-off events. For 1462460/1462460 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 51556 event pairs, 869 based on Foata normal form. 20/7962 useless extension candidates. Maximal degree in co-relation 85741. Up to 6715 conditions per place. [2024-06-03 20:16:22,751 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 518 selfloop transitions, 238 changer transitions 0/761 dead transitions. [2024-06-03 20:16:22,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 761 transitions, 14442 flow [2024-06-03 20:16:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 20:16:22,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-03 20:16:22,753 INFO L175 Difference]: Start difference. First operand has 481 places, 724 transitions, 12121 flow. Second operand 10 states and 197 transitions. [2024-06-03 20:16:22,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 761 transitions, 14442 flow [2024-06-03 20:16:28,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 761 transitions, 14083 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:28,815 INFO L231 Difference]: Finished difference. Result has 485 places, 726 transitions, 12337 flow [2024-06-03 20:16:28,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11762, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12337, PETRI_PLACES=485, PETRI_TRANSITIONS=726} [2024-06-03 20:16:28,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-03 20:16:28,815 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 726 transitions, 12337 flow [2024-06-03 20:16:28,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:28,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:28,816 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] [2024-06-03 20:16:28,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:16:28,816 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)] === [2024-06-03 20:16:28,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash 571779272, now seen corresponding path program 1 times [2024-06-03 20:16:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:28,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907739826] [2024-06-03 20:16:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:29,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907739826] [2024-06-03 20:16:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907739826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:29,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:29,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328156890] [2024-06-03 20:16:29,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:29,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:29,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 726 transitions, 12337 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:29,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:29,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:29,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:32,703 INFO L124 PetriNetUnfolderBase]: 5110/8096 cut-off events. [2024-06-03 20:16:32,703 INFO L125 PetriNetUnfolderBase]: For 1474273/1474273 co-relation queries the response was YES. [2024-06-03 20:16:32,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88820 conditions, 8096 events. 5110/8096 cut-off events. For 1474273/1474273 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 52707 event pairs, 871 based on Foata normal form. 16/8107 useless extension candidates. Maximal degree in co-relation 88596. Up to 6841 conditions per place. [2024-06-03 20:16:32,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 554 selfloop transitions, 215 changer transitions 0/774 dead transitions. [2024-06-03 20:16:32,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 774 transitions, 15299 flow [2024-06-03 20:16:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 20:16:32,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 20:16:32,854 INFO L175 Difference]: Start difference. First operand has 485 places, 726 transitions, 12337 flow. Second operand 9 states and 182 transitions. [2024-06-03 20:16:32,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 774 transitions, 15299 flow [2024-06-03 20:16:39,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 774 transitions, 14759 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:39,928 INFO L231 Difference]: Finished difference. Result has 489 places, 738 transitions, 13014 flow [2024-06-03 20:16:39,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11809, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13014, PETRI_PLACES=489, PETRI_TRANSITIONS=738} [2024-06-03 20:16:39,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-03 20:16:39,929 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 738 transitions, 13014 flow [2024-06-03 20:16:39,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:39,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:39,929 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] [2024-06-03 20:16:39,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:16:39,929 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)] === [2024-06-03 20:16:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash -391547356, now seen corresponding path program 4 times [2024-06-03 20:16:39,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:39,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900534838] [2024-06-03 20:16:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:40,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900534838] [2024-06-03 20:16:40,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900534838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:40,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:40,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:40,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543970419] [2024-06-03 20:16:40,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:40,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:40,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:41,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:41,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 738 transitions, 13014 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:41,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:41,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:41,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:43,674 INFO L124 PetriNetUnfolderBase]: 5182/8220 cut-off events. [2024-06-03 20:16:43,674 INFO L125 PetriNetUnfolderBase]: For 1565273/1565273 co-relation queries the response was YES. [2024-06-03 20:16:43,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91227 conditions, 8220 events. 5182/8220 cut-off events. For 1565273/1565273 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 53670 event pairs, 925 based on Foata normal form. 20/8237 useless extension candidates. Maximal degree in co-relation 90999. Up to 7377 conditions per place. [2024-06-03 20:16:44,103 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 630 selfloop transitions, 136 changer transitions 0/771 dead transitions. [2024-06-03 20:16:44,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 771 transitions, 15123 flow [2024-06-03 20:16:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 20:16:44,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-03 20:16:44,125 INFO L175 Difference]: Start difference. First operand has 489 places, 738 transitions, 13014 flow. Second operand 10 states and 191 transitions. [2024-06-03 20:16:44,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 771 transitions, 15123 flow [2024-06-03 20:16:50,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 771 transitions, 14755 flow, removed 138 selfloop flow, removed 3 redundant places. [2024-06-03 20:16:50,347 INFO L231 Difference]: Finished difference. Result has 497 places, 742 transitions, 13062 flow [2024-06-03 20:16:50,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12646, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13062, PETRI_PLACES=497, PETRI_TRANSITIONS=742} [2024-06-03 20:16:50,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-03 20:16:50,348 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 742 transitions, 13062 flow [2024-06-03 20:16:50,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:50,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:50,348 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] [2024-06-03 20:16:50,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:16:50,348 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)] === [2024-06-03 20:16:50,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:50,349 INFO L85 PathProgramCache]: Analyzing trace with hash -391695226, now seen corresponding path program 5 times [2024-06-03 20:16:50,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:50,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911229492] [2024-06-03 20:16:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:50,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:51,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:51,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911229492] [2024-06-03 20:16:51,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911229492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:51,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:51,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334470613] [2024-06-03 20:16:51,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:51,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:51,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:51,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:51,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 742 transitions, 13062 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:51,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:51,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:51,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:55,306 INFO L124 PetriNetUnfolderBase]: 5951/9427 cut-off events. [2024-06-03 20:16:55,306 INFO L125 PetriNetUnfolderBase]: For 2572181/2572181 co-relation queries the response was YES. [2024-06-03 20:16:55,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115574 conditions, 9427 events. 5951/9427 cut-off events. For 2572181/2572181 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 62282 event pairs, 1108 based on Foata normal form. 56/9480 useless extension candidates. Maximal degree in co-relation 115343. Up to 6889 conditions per place. [2024-06-03 20:16:55,495 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 584 selfloop transitions, 208 changer transitions 0/797 dead transitions. [2024-06-03 20:16:55,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 797 transitions, 16105 flow [2024-06-03 20:16:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-03 20:16:55,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-03 20:16:55,497 INFO L175 Difference]: Start difference. First operand has 497 places, 742 transitions, 13062 flow. Second operand 10 states and 205 transitions. [2024-06-03 20:16:55,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 797 transitions, 16105 flow [2024-06-03 20:17:02,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 797 transitions, 15782 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:02,781 INFO L231 Difference]: Finished difference. Result has 502 places, 747 transitions, 13413 flow [2024-06-03 20:17:02,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12749, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13413, PETRI_PLACES=502, PETRI_TRANSITIONS=747} [2024-06-03 20:17:02,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-03 20:17:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 747 transitions, 13413 flow [2024-06-03 20:17:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:02,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:02,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:17:02,783 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)] === [2024-06-03 20:17:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash 571629170, now seen corresponding path program 6 times [2024-06-03 20:17:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:02,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891230759] [2024-06-03 20:17:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891230759] [2024-06-03 20:17:03,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891230759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:03,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:03,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:03,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39455498] [2024-06-03 20:17:03,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:03,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:04,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:04,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 747 transitions, 13413 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:04,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:04,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:08,072 INFO L124 PetriNetUnfolderBase]: 6069/9625 cut-off events. [2024-06-03 20:17:08,073 INFO L125 PetriNetUnfolderBase]: For 2565956/2565956 co-relation queries the response was YES. [2024-06-03 20:17:08,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115485 conditions, 9625 events. 6069/9625 cut-off events. For 2565956/2565956 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 63533 event pairs, 1314 based on Foata normal form. 68/9690 useless extension candidates. Maximal degree in co-relation 115252. Up to 7994 conditions per place. [2024-06-03 20:17:08,415 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 553 selfloop transitions, 212 changer transitions 21/791 dead transitions. [2024-06-03 20:17:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 791 transitions, 15598 flow [2024-06-03 20:17:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:17:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:17:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-03 20:17:08,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-03 20:17:08,417 INFO L175 Difference]: Start difference. First operand has 502 places, 747 transitions, 13413 flow. Second operand 11 states and 216 transitions. [2024-06-03 20:17:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 791 transitions, 15598 flow [2024-06-03 20:17:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 791 transitions, 15209 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:16,717 INFO L231 Difference]: Finished difference. Result has 509 places, 734 transitions, 13465 flow [2024-06-03 20:17:16,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13026, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13465, PETRI_PLACES=509, PETRI_TRANSITIONS=734} [2024-06-03 20:17:16,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-03 20:17:16,718 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 734 transitions, 13465 flow [2024-06-03 20:17:16,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:16,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:16,718 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] [2024-06-03 20:17:16,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:17:16,718 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)] === [2024-06-03 20:17:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash -143597564, now seen corresponding path program 2 times [2024-06-03 20:17:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:16,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168537439] [2024-06-03 20:17:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168537439] [2024-06-03 20:17:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168537439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:17,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909416582] [2024-06-03 20:17:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:17,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:17,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 734 transitions, 13465 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:17,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:17,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:17,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:21,858 INFO L124 PetriNetUnfolderBase]: 5941/9437 cut-off events. [2024-06-03 20:17:21,858 INFO L125 PetriNetUnfolderBase]: For 2219044/2219044 co-relation queries the response was YES. [2024-06-03 20:17:22,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114747 conditions, 9437 events. 5941/9437 cut-off events. For 2219044/2219044 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 62512 event pairs, 1312 based on Foata normal form. 16/9448 useless extension candidates. Maximal degree in co-relation 114510. Up to 8594 conditions per place. [2024-06-03 20:17:22,109 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 624 selfloop transitions, 146 changer transitions 0/775 dead transitions. [2024-06-03 20:17:22,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 775 transitions, 16196 flow [2024-06-03 20:17:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:17:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:17:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-03 20:17:22,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-03 20:17:22,110 INFO L175 Difference]: Start difference. First operand has 509 places, 734 transitions, 13465 flow. Second operand 11 states and 212 transitions. [2024-06-03 20:17:22,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 775 transitions, 16196 flow [2024-06-03 20:17:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 775 transitions, 15720 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-03 20:17:29,741 INFO L231 Difference]: Finished difference. Result has 512 places, 743 transitions, 13771 flow [2024-06-03 20:17:29,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12989, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13771, PETRI_PLACES=512, PETRI_TRANSITIONS=743} [2024-06-03 20:17:29,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-03 20:17:29,742 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 743 transitions, 13771 flow [2024-06-03 20:17:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:29,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:29,742 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] [2024-06-03 20:17:29,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:17:29,742 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)] === [2024-06-03 20:17:29,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash -143590124, now seen corresponding path program 3 times [2024-06-03 20:17:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:29,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657198200] [2024-06-03 20:17:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:29,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:30,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:30,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657198200] [2024-06-03 20:17:30,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657198200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:30,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:30,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109654345] [2024-06-03 20:17:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:30,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:30,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:30,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 743 transitions, 13771 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:30,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:30,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:30,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:34,853 INFO L124 PetriNetUnfolderBase]: 6114/9704 cut-off events. [2024-06-03 20:17:34,853 INFO L125 PetriNetUnfolderBase]: For 2384866/2384866 co-relation queries the response was YES. [2024-06-03 20:17:34,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119472 conditions, 9704 events. 6114/9704 cut-off events. For 2384866/2384866 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 64482 event pairs, 1352 based on Foata normal form. 14/9715 useless extension candidates. Maximal degree in co-relation 119232. Up to 8731 conditions per place. [2024-06-03 20:17:35,028 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 656 selfloop transitions, 122 changer transitions 0/783 dead transitions. [2024-06-03 20:17:35,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 783 transitions, 16274 flow [2024-06-03 20:17:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:17:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:17:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-03 20:17:35,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-03 20:17:35,029 INFO L175 Difference]: Start difference. First operand has 512 places, 743 transitions, 13771 flow. Second operand 11 states and 212 transitions. [2024-06-03 20:17:35,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 783 transitions, 16274 flow [2024-06-03 20:17:43,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 783 transitions, 15542 flow, removed 141 selfloop flow, removed 8 redundant places. [2024-06-03 20:17:43,296 INFO L231 Difference]: Finished difference. Result has 516 places, 748 transitions, 13576 flow [2024-06-03 20:17:43,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13064, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13576, PETRI_PLACES=516, PETRI_TRANSITIONS=748} [2024-06-03 20:17:43,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 473 predicate places. [2024-06-03 20:17:43,297 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 748 transitions, 13576 flow [2024-06-03 20:17:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:43,298 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] [2024-06-03 20:17:43,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:17:43,298 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)] === [2024-06-03 20:17:43,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash -149161754, now seen corresponding path program 4 times [2024-06-03 20:17:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646620297] [2024-06-03 20:17:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:43,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:44,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:44,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646620297] [2024-06-03 20:17:44,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646620297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:44,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:44,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:44,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779967667] [2024-06-03 20:17:44,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:44,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:44,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:44,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:44,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 748 transitions, 13576 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:44,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:44,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:44,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:48,204 INFO L124 PetriNetUnfolderBase]: 6128/9732 cut-off events. [2024-06-03 20:17:48,204 INFO L125 PetriNetUnfolderBase]: For 2344442/2344442 co-relation queries the response was YES. [2024-06-03 20:17:48,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116764 conditions, 9732 events. 6128/9732 cut-off events. For 2344442/2344442 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 64781 event pairs, 1364 based on Foata normal form. 26/9753 useless extension candidates. Maximal degree in co-relation 116525. Up to 8837 conditions per place. [2024-06-03 20:17:48,589 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 631 selfloop transitions, 141 changer transitions 0/777 dead transitions. [2024-06-03 20:17:48,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 777 transitions, 15703 flow [2024-06-03 20:17:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:17:48,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:17:48,591 INFO L175 Difference]: Start difference. First operand has 516 places, 748 transitions, 13576 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:17:48,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 777 transitions, 15703 flow [2024-06-03 20:17:55,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 777 transitions, 15309 flow, removed 120 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:55,701 INFO L231 Difference]: Finished difference. Result has 521 places, 751 transitions, 13571 flow [2024-06-03 20:17:55,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13182, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13571, PETRI_PLACES=521, PETRI_TRANSITIONS=751} [2024-06-03 20:17:55,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-03 20:17:55,702 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 751 transitions, 13571 flow [2024-06-03 20:17:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:55,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:55,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:17:55,702 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)] === [2024-06-03 20:17:55,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash -149167706, now seen corresponding path program 7 times [2024-06-03 20:17:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123296581] [2024-06-03 20:17:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123296581] [2024-06-03 20:17:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123296581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:56,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:56,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:56,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540278559] [2024-06-03 20:17:56,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:56,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:56,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:56,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:56,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:57,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:57,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 751 transitions, 13571 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:57,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:57,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:57,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:01,253 INFO L124 PetriNetUnfolderBase]: 6374/10124 cut-off events. [2024-06-03 20:18:01,254 INFO L125 PetriNetUnfolderBase]: For 2768419/2768419 co-relation queries the response was YES. [2024-06-03 20:18:01,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121469 conditions, 10124 events. 6374/10124 cut-off events. For 2768419/2768419 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 67689 event pairs, 1456 based on Foata normal form. 66/10187 useless extension candidates. Maximal degree in co-relation 121226. Up to 9024 conditions per place. [2024-06-03 20:18:01,454 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 662 selfloop transitions, 106 changer transitions 13/786 dead transitions. [2024-06-03 20:18:01,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 786 transitions, 15601 flow [2024-06-03 20:18:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:18:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:18:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 20:18:01,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-03 20:18:01,456 INFO L175 Difference]: Start difference. First operand has 521 places, 751 transitions, 13571 flow. Second operand 10 states and 193 transitions. [2024-06-03 20:18:01,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 786 transitions, 15601 flow [2024-06-03 20:18:10,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 786 transitions, 15297 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:10,356 INFO L231 Difference]: Finished difference. Result has 525 places, 746 transitions, 13532 flow [2024-06-03 20:18:10,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13270, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13532, PETRI_PLACES=525, PETRI_TRANSITIONS=746} [2024-06-03 20:18:10,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-03 20:18:10,357 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 746 transitions, 13532 flow [2024-06-03 20:18:10,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:10,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:10,357 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] [2024-06-03 20:18:10,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:18:10,357 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)] === [2024-06-03 20:18:10,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1107126002, now seen corresponding path program 8 times [2024-06-03 20:18:10,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956568512] [2024-06-03 20:18:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:10,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956568512] [2024-06-03 20:18:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956568512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:11,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:11,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:18:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144551064] [2024-06-03 20:18:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:11,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:18:11,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:18:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:18:11,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:11,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 746 transitions, 13532 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:11,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:11,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:11,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:15,764 INFO L124 PetriNetUnfolderBase]: 6274/9980 cut-off events. [2024-06-03 20:18:15,764 INFO L125 PetriNetUnfolderBase]: For 2402993/2402993 co-relation queries the response was YES. [2024-06-03 20:18:15,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120316 conditions, 9980 events. 6274/9980 cut-off events. For 2402993/2402993 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66818 event pairs, 1442 based on Foata normal form. 20/9997 useless extension candidates. Maximal degree in co-relation 120071. Up to 9323 conditions per place. [2024-06-03 20:18:15,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 679 selfloop transitions, 93 changer transitions 0/777 dead transitions. [2024-06-03 20:18:15,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 777 transitions, 15430 flow [2024-06-03 20:18:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:18:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:18:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-03 20:18:15,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-03 20:18:15,984 INFO L175 Difference]: Start difference. First operand has 525 places, 746 transitions, 13532 flow. Second operand 12 states and 217 transitions. [2024-06-03 20:18:15,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 777 transitions, 15430 flow