./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:44:57,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:44:57,567 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:44:57,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:44:57,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:44:57,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:44:57,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:44:57,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:44:57,594 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:44:57,597 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:44:57,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:44:57,598 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:44:57,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:44:57,600 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:44:57,600 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:44:57,600 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:44:57,600 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:44:57,601 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:44:57,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:44:57,601 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:44:57,601 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:44:57,602 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:44:57,602 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:44:57,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:44:57,602 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:44:57,603 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:44:57,603 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:44:57,603 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:44:57,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:44:57,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:44:57,605 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:44:57,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:44:57,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:44:57,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:44:57,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:44:57,606 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:44:57,606 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:44:57,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:44:57,606 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:44:57,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:44:57,607 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:44:57,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:44:57,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:44:57,607 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:44:57,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:44:57,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:44:57,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:44:57,798 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:44:57,799 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:44:57,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-20 16:44:58,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:44:58,977 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:44:58,978 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-20 16:44:58,989 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab47ddfac/16b9c930734c435e8be4f6be957ce5ee/FLAGbde9061b2 [2024-06-20 16:44:59,006 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab47ddfac/16b9c930734c435e8be4f6be957ce5ee [2024-06-20 16:44:59,008 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:44:59,008 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:44:59,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:44:59,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:44:59,175 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:44:59,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:44:59,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:44:59,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:44:59,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:44:59" (1/2) ... [2024-06-20 16:44:59,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679244ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:44:59, skipping insertion in model container [2024-06-20 16:44:59,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:44:59" (1/2) ... [2024-06-20 16:44:59,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@137790ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:44:59, skipping insertion in model container [2024-06-20 16:44:59,183 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:44:59" (2/2) ... [2024-06-20 16:44:59,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679244ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59, skipping insertion in model container [2024-06-20 16:44:59,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:44:59" (2/2) ... [2024-06-20 16:44:59,183 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:44:59,243 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:44:59,247 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:44:59,248 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:44:59,248 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:44:59,248 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:44:59,248 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-20 16:44:59,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:44:59,555 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:44:59,566 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:44:59,692 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:44:59,726 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:44:59,726 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59 WrapperNode [2024-06-20 16:44:59,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:44:59,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:44:59,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:44:59,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:44:59,732 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 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,743 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 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,775 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-20 16:44:59,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:44:59,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:44:59,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:44:59,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:44:59,789 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,792 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,804 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:44:59,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,828 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:44:59,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:44:59,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:44:59,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:44:59,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (1/1) ... [2024-06-20 16:44:59,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:44:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:44:59,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:44:59,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:44:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:44:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:44:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:44:59,924 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:44:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:44:59,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:44:59,925 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:44:59,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:44:59,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:44:59,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:44:59,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:44:59,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:44:59,926 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:45:00,066 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:45:00,068 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:45:00,339 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:45:00,339 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:45:00,470 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:45:00,470 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:45:00,470 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:45:00 BoogieIcfgContainer [2024-06-20 16:45:00,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:45:00,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:45:00,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:45:00,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:45:00,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:44:59" (1/4) ... [2024-06-20 16:45:00,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a50fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:45:00, skipping insertion in model container [2024-06-20 16:45:00,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:44:59" (2/4) ... [2024-06-20 16:45:00,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a50fa0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:45:00, skipping insertion in model container [2024-06-20 16:45:00,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:44:59" (3/4) ... [2024-06-20 16:45:00,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a50fa0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:45:00, skipping insertion in model container [2024-06-20 16:45:00,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:45:00" (4/4) ... [2024-06-20 16:45:00,476 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-20 16:45:00,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:45:00,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:45:00,489 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:45:00,519 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:45:00,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:45:00,576 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 16:45:00,577 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:45:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:45:00,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:45:00,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 16:45:00,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:45:00,638 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;@4e70aee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:45:00,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:45:00,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:45:00,644 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:45:00,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:45:00,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:00,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:45:00,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:00,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-20 16:45:00,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:00,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704631041] [2024-06-20 16:45:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:01,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:01,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704631041] [2024-06-20 16:45:01,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704631041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:01,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:01,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:45:01,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232293139] [2024-06-20 16:45:01,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:01,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:45:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:45:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:45:01,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:45:01,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:01,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:01,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:45:01,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:02,015 INFO L124 PetriNetUnfolderBase]: 1152/1746 cut-off events. [2024-06-20 16:45:02,015 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 16:45:02,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 1746 events. 1152/1746 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8021 event pairs, 785 based on Foata normal form. 1/1711 useless extension candidates. Maximal degree in co-relation 3551. Up to 1732 conditions per place. [2024-06-20 16:45:02,028 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 16:45:02,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 167 flow [2024-06-20 16:45:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:45:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:45:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-20 16:45:02,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-20 16:45:02,039 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2024-06-20 16:45:02,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 167 flow [2024-06-20 16:45:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:02,044 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 16:45:02,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 16:45:02,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 16:45:02,048 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 16:45:02,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:02,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:02,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:02,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:45:02,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:02,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash -554505855, now seen corresponding path program 1 times [2024-06-20 16:45:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:02,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412359980] [2024-06-20 16:45:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412359980] [2024-06-20 16:45:02,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412359980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:02,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:02,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:45:02,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873458521] [2024-06-20 16:45:02,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:45:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:45:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:45:02,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:45:02,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:02,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:02,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:45:02,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:03,044 INFO L124 PetriNetUnfolderBase]: 1389/2094 cut-off events. [2024-06-20 16:45:03,045 INFO L125 PetriNetUnfolderBase]: For 402/426 co-relation queries the response was YES. [2024-06-20 16:45:03,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 2094 events. 1389/2094 cut-off events. For 402/426 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9522 event pairs, 621 based on Foata normal form. 13/2101 useless extension candidates. Maximal degree in co-relation 4816. Up to 2033 conditions per place. [2024-06-20 16:45:03,053 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 16:45:03,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 244 flow [2024-06-20 16:45:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:45:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:45:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-20 16:45:03,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 16:45:03,055 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 91 transitions. [2024-06-20 16:45:03,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 244 flow [2024-06-20 16:45:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:45:03,057 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-20 16:45:03,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 16:45:03,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-20 16:45:03,058 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-20 16:45:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:03,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:03,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:03,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:45:03,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:03,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1773745506, now seen corresponding path program 1 times [2024-06-20 16:45:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115126897] [2024-06-20 16:45:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:04,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:04,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115126897] [2024-06-20 16:45:04,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115126897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:04,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:04,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:45:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72988902] [2024-06-20 16:45:04,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:04,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:45:04,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:45:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:45:04,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:45:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:45:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:04,386 INFO L124 PetriNetUnfolderBase]: 1380/2079 cut-off events. [2024-06-20 16:45:04,387 INFO L125 PetriNetUnfolderBase]: For 1135/1178 co-relation queries the response was YES. [2024-06-20 16:45:04,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5319 conditions, 2079 events. 1380/2079 cut-off events. For 1135/1178 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9386 event pairs, 481 based on Foata normal form. 18/2091 useless extension candidates. Maximal degree in co-relation 5305. Up to 1988 conditions per place. [2024-06-20 16:45:04,396 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2024-06-20 16:45:04,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 300 flow [2024-06-20 16:45:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:45:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:45:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-20 16:45:04,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-06-20 16:45:04,398 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 107 transitions. [2024-06-20 16:45:04,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 300 flow [2024-06-20 16:45:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:45:04,400 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 155 flow [2024-06-20 16:45:04,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-20 16:45:04,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-20 16:45:04,401 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 155 flow [2024-06-20 16:45:04,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:04,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:04,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:04,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:45:04,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:04,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-20 16:45:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:04,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774558891] [2024-06-20 16:45:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:04,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:05,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:05,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774558891] [2024-06-20 16:45:05,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774558891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:05,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:05,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:45:05,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116883134] [2024-06-20 16:45:05,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:05,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:45:05,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:45:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:45:05,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:45:05,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:05,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:05,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:45:05,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:05,379 INFO L124 PetriNetUnfolderBase]: 1126/1706 cut-off events. [2024-06-20 16:45:05,379 INFO L125 PetriNetUnfolderBase]: For 1636/1639 co-relation queries the response was YES. [2024-06-20 16:45:05,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4743 conditions, 1706 events. 1126/1706 cut-off events. For 1636/1639 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7635 event pairs, 594 based on Foata normal form. 4/1707 useless extension candidates. Maximal degree in co-relation 4727. Up to 1683 conditions per place. [2024-06-20 16:45:05,386 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-20 16:45:05,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 291 flow [2024-06-20 16:45:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:45:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:45:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 16:45:05,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-20 16:45:05,388 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 155 flow. Second operand 5 states and 89 transitions. [2024-06-20 16:45:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 291 flow [2024-06-20 16:45:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 268 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:05,390 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 176 flow [2024-06-20 16:45:05,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-20 16:45:05,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-06-20 16:45:05,391 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 176 flow [2024-06-20 16:45:05,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:05,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:05,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:05,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:45:05,392 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:05,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash 243767570, now seen corresponding path program 1 times [2024-06-20 16:45:05,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:05,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362109706] [2024-06-20 16:45:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:05,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:06,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362109706] [2024-06-20 16:45:06,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362109706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:06,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:06,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:45:06,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961375155] [2024-06-20 16:45:06,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:45:06,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:45:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:45:06,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:06,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:06,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:06,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:06,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:06,462 INFO L124 PetriNetUnfolderBase]: 1594/2383 cut-off events. [2024-06-20 16:45:06,463 INFO L125 PetriNetUnfolderBase]: For 3233/3233 co-relation queries the response was YES. [2024-06-20 16:45:06,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 2383 events. 1594/2383 cut-off events. For 3233/3233 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10764 event pairs, 784 based on Foata normal form. 2/2383 useless extension candidates. Maximal degree in co-relation 6946. Up to 2353 conditions per place. [2024-06-20 16:45:06,475 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-20 16:45:06,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 364 flow [2024-06-20 16:45:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:45:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:45:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-20 16:45:06,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:45:06,477 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 176 flow. Second operand 6 states and 95 transitions. [2024-06-20 16:45:06,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 364 flow [2024-06-20 16:45:06,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 342 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:06,482 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 228 flow [2024-06-20 16:45:06,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-20 16:45:06,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-20 16:45:06,483 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 228 flow [2024-06-20 16:45:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:06,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:06,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:45:06,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:06,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-20 16:45:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:06,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874733353] [2024-06-20 16:45:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:06,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874733353] [2024-06-20 16:45:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874733353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:07,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:07,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:45:07,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480268704] [2024-06-20 16:45:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:07,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:45:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:45:07,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:45:07,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:07,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:07,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:07,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:07,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:07,903 INFO L124 PetriNetUnfolderBase]: 1589/2376 cut-off events. [2024-06-20 16:45:07,903 INFO L125 PetriNetUnfolderBase]: For 4362/4362 co-relation queries the response was YES. [2024-06-20 16:45:07,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7531 conditions, 2376 events. 1589/2376 cut-off events. For 4362/4362 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10753 event pairs, 766 based on Foata normal form. 2/2376 useless extension candidates. Maximal degree in co-relation 7510. Up to 2337 conditions per place. [2024-06-20 16:45:07,915 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 55 selfloop transitions, 14 changer transitions 0/72 dead transitions. [2024-06-20 16:45:07,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 424 flow [2024-06-20 16:45:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 16:45:07,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-20 16:45:07,916 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 228 flow. Second operand 7 states and 109 transitions. [2024-06-20 16:45:07,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 424 flow [2024-06-20 16:45:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:45:07,920 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 278 flow [2024-06-20 16:45:07,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-20 16:45:07,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 16:45:07,920 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 278 flow [2024-06-20 16:45:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:07,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:07,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:07,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:45:07,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:07,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2053725543, now seen corresponding path program 1 times [2024-06-20 16:45:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:07,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521338484] [2024-06-20 16:45:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521338484] [2024-06-20 16:45:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521338484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:08,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:08,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:45:08,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414422249] [2024-06-20 16:45:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:45:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:45:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:45:08,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:45:08,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 278 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:08,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:08,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:45:08,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:08,984 INFO L124 PetriNetUnfolderBase]: 1575/2372 cut-off events. [2024-06-20 16:45:08,984 INFO L125 PetriNetUnfolderBase]: For 6837/6924 co-relation queries the response was YES. [2024-06-20 16:45:08,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8269 conditions, 2372 events. 1575/2372 cut-off events. For 6837/6924 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10901 event pairs, 573 based on Foata normal form. 27/2344 useless extension candidates. Maximal degree in co-relation 8245. Up to 2240 conditions per place. [2024-06-20 16:45:08,996 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 56 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-20 16:45:08,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 502 flow [2024-06-20 16:45:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:45:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:45:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:45:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:45:08,998 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 278 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:45:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 502 flow [2024-06-20 16:45:09,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 474 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:09,002 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 328 flow [2024-06-20 16:45:09,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-20 16:45:09,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-20 16:45:09,003 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 328 flow [2024-06-20 16:45:09,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:09,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:09,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:09,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:45:09,003 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:09,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1420365991, now seen corresponding path program 2 times [2024-06-20 16:45:09,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:09,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407461973] [2024-06-20 16:45:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:09,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:09,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407461973] [2024-06-20 16:45:09,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407461973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:09,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:09,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:45:09,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926321902] [2024-06-20 16:45:09,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:09,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:45:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:09,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:45:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:45:09,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:45:09,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 328 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:09,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:09,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:45:09,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:10,072 INFO L124 PetriNetUnfolderBase]: 1581/2383 cut-off events. [2024-06-20 16:45:10,072 INFO L125 PetriNetUnfolderBase]: For 9305/9374 co-relation queries the response was YES. [2024-06-20 16:45:10,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 2383 events. 1581/2383 cut-off events. For 9305/9374 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10981 event pairs, 564 based on Foata normal form. 27/2356 useless extension candidates. Maximal degree in co-relation 9056. Up to 2183 conditions per place. [2024-06-20 16:45:10,087 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-20 16:45:10,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 622 flow [2024-06-20 16:45:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:45:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:45:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 16:45:10,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-20 16:45:10,089 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 328 flow. Second operand 6 states and 109 transitions. [2024-06-20 16:45:10,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 622 flow [2024-06-20 16:45:10,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 597 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 16:45:10,095 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 411 flow [2024-06-20 16:45:10,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-20 16:45:10,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-20 16:45:10,097 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 411 flow [2024-06-20 16:45:10,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:10,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:10,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:10,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:45:10,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:10,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1420365805, now seen corresponding path program 1 times [2024-06-20 16:45:10,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:10,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481317114] [2024-06-20 16:45:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:10,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481317114] [2024-06-20 16:45:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481317114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:10,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:10,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:45:10,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162117583] [2024-06-20 16:45:10,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:10,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:45:10,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:45:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:45:10,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:10,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 411 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:10,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:10,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:10,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:11,257 INFO L124 PetriNetUnfolderBase]: 1771/2635 cut-off events. [2024-06-20 16:45:11,257 INFO L125 PetriNetUnfolderBase]: For 10761/10770 co-relation queries the response was YES. [2024-06-20 16:45:11,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10373 conditions, 2635 events. 1771/2635 cut-off events. For 10761/10770 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12036 event pairs, 524 based on Foata normal form. 14/2645 useless extension candidates. Maximal degree in co-relation 10345. Up to 2478 conditions per place. [2024-06-20 16:45:11,270 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 73 selfloop transitions, 30 changer transitions 0/106 dead transitions. [2024-06-20 16:45:11,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 822 flow [2024-06-20 16:45:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:45:11,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:45:11,271 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 411 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:45:11,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 822 flow [2024-06-20 16:45:11,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 793 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 16:45:11,280 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 617 flow [2024-06-20 16:45:11,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=617, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2024-06-20 16:45:11,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 16:45:11,281 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 617 flow [2024-06-20 16:45:11,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:11,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:11,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:11,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:45:11,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:11,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1962521359, now seen corresponding path program 2 times [2024-06-20 16:45:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:11,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678661680] [2024-06-20 16:45:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:11,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:12,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:12,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678661680] [2024-06-20 16:45:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678661680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:12,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:12,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:45:12,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878939188] [2024-06-20 16:45:12,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:45:12,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:45:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:45:12,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:12,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:12,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:12,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:12,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:12,486 INFO L124 PetriNetUnfolderBase]: 1782/2651 cut-off events. [2024-06-20 16:45:12,486 INFO L125 PetriNetUnfolderBase]: For 14398/14407 co-relation queries the response was YES. [2024-06-20 16:45:12,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12004 conditions, 2651 events. 1782/2651 cut-off events. For 14398/14407 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12010 event pairs, 613 based on Foata normal form. 8/2655 useless extension candidates. Maximal degree in co-relation 11972. Up to 2557 conditions per place. [2024-06-20 16:45:12,500 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 27 changer transitions 0/121 dead transitions. [2024-06-20 16:45:12,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 121 transitions, 1090 flow [2024-06-20 16:45:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:45:12,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 16:45:12,501 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 617 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:45:12,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 121 transitions, 1090 flow [2024-06-20 16:45:12,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 121 transitions, 1051 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 16:45:12,512 INFO L231 Difference]: Finished difference. Result has 80 places, 100 transitions, 839 flow [2024-06-20 16:45:12,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=839, PETRI_PLACES=80, PETRI_TRANSITIONS=100} [2024-06-20 16:45:12,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 16:45:12,513 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 100 transitions, 839 flow [2024-06-20 16:45:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:12,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:12,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:12,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:45:12,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:12,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758509, now seen corresponding path program 3 times [2024-06-20 16:45:12,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:12,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100361393] [2024-06-20 16:45:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:12,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:13,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:13,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100361393] [2024-06-20 16:45:13,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100361393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:13,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:13,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:45:13,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480995397] [2024-06-20 16:45:13,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:45:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:45:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:45:13,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:13,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 100 transitions, 839 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:13,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:13,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:13,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:13,712 INFO L124 PetriNetUnfolderBase]: 1833/2722 cut-off events. [2024-06-20 16:45:13,712 INFO L125 PetriNetUnfolderBase]: For 18031/18046 co-relation queries the response was YES. [2024-06-20 16:45:13,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13068 conditions, 2722 events. 1833/2722 cut-off events. For 18031/18046 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12329 event pairs, 617 based on Foata normal form. 15/2733 useless extension candidates. Maximal degree in co-relation 13031. Up to 2598 conditions per place. [2024-06-20 16:45:13,729 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 98 selfloop transitions, 35 changer transitions 0/136 dead transitions. [2024-06-20 16:45:13,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1299 flow [2024-06-20 16:45:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:45:13,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-20 16:45:13,731 INFO L175 Difference]: Start difference. First operand has 80 places, 100 transitions, 839 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:45:13,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1299 flow [2024-06-20 16:45:13,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 1255 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 16:45:13,746 INFO L231 Difference]: Finished difference. Result has 89 places, 113 transitions, 1027 flow [2024-06-20 16:45:13,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=89, PETRI_TRANSITIONS=113} [2024-06-20 16:45:13,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-20 16:45:13,747 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 113 transitions, 1027 flow [2024-06-20 16:45:13,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:13,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:13,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:45:13,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:13,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1962512431, now seen corresponding path program 1 times [2024-06-20 16:45:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:13,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742295462] [2024-06-20 16:45:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:14,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:14,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742295462] [2024-06-20 16:45:14,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742295462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:14,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:14,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:14,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970017652] [2024-06-20 16:45:14,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:14,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:14,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:14,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:14,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:14,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:14,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 113 transitions, 1027 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:14,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:14,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:14,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:15,236 INFO L124 PetriNetUnfolderBase]: 1825/2708 cut-off events. [2024-06-20 16:45:15,237 INFO L125 PetriNetUnfolderBase]: For 22222/22222 co-relation queries the response was YES. [2024-06-20 16:45:15,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14008 conditions, 2708 events. 1825/2708 cut-off events. For 22222/22222 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12197 event pairs, 592 based on Foata normal form. 4/2710 useless extension candidates. Maximal degree in co-relation 13966. Up to 2651 conditions per place. [2024-06-20 16:45:15,252 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-06-20 16:45:15,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1381 flow [2024-06-20 16:45:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 16:45:15,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-20 16:45:15,253 INFO L175 Difference]: Start difference. First operand has 89 places, 113 transitions, 1027 flow. Second operand 8 states and 123 transitions. [2024-06-20 16:45:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1381 flow [2024-06-20 16:45:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1300 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:15,273 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 1011 flow [2024-06-20 16:45:15,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-20 16:45:15,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-20 16:45:15,274 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 1011 flow [2024-06-20 16:45:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:15,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:15,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:15,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:45:15,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:15,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1915895002, now seen corresponding path program 1 times [2024-06-20 16:45:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352302499] [2024-06-20 16:45:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:16,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:16,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352302499] [2024-06-20 16:45:16,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352302499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:16,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:16,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272765511] [2024-06-20 16:45:16,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:16,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:16,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:16,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:45:16,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:16,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:16,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:45:16,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:16,633 INFO L124 PetriNetUnfolderBase]: 1738/2599 cut-off events. [2024-06-20 16:45:16,634 INFO L125 PetriNetUnfolderBase]: For 25073/25185 co-relation queries the response was YES. [2024-06-20 16:45:16,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13770 conditions, 2599 events. 1738/2599 cut-off events. For 25073/25185 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11779 event pairs, 570 based on Foata normal form. 47/2619 useless extension candidates. Maximal degree in co-relation 13726. Up to 2439 conditions per place. [2024-06-20 16:45:16,648 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2024-06-20 16:45:16,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 134 transitions, 1299 flow [2024-06-20 16:45:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:45:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:45:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:45:16,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:45:16,649 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 1011 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:45:16,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 134 transitions, 1299 flow [2024-06-20 16:45:16,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 134 transitions, 1244 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:45:16,665 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 1006 flow [2024-06-20 16:45:16,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1006, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-20 16:45:16,666 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-20 16:45:16,666 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 1006 flow [2024-06-20 16:45:16,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:16,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:16,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:16,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:45:16,667 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)] === [2024-06-20 16:45:16,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash 81821207, now seen corresponding path program 1 times [2024-06-20 16:45:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822738931] [2024-06-20 16:45:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822738931] [2024-06-20 16:45:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822738931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:17,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:17,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:17,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428006565] [2024-06-20 16:45:17,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:17,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:17,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:17,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:17,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:17,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:17,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:18,073 INFO L124 PetriNetUnfolderBase]: 1999/2955 cut-off events. [2024-06-20 16:45:18,073 INFO L125 PetriNetUnfolderBase]: For 29600/29615 co-relation queries the response was YES. [2024-06-20 16:45:18,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15779 conditions, 2955 events. 1999/2955 cut-off events. For 29600/29615 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13549 event pairs, 546 based on Foata normal form. 20/2969 useless extension candidates. Maximal degree in co-relation 15734. Up to 2686 conditions per place. [2024-06-20 16:45:18,091 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 131 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-20 16:45:18,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 172 transitions, 1745 flow [2024-06-20 16:45:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:45:18,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-20 16:45:18,092 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 1006 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:45:18,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 172 transitions, 1745 flow [2024-06-20 16:45:18,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 172 transitions, 1681 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:18,118 INFO L231 Difference]: Finished difference. Result has 101 places, 136 transitions, 1284 flow [2024-06-20 16:45:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1284, PETRI_PLACES=101, PETRI_TRANSITIONS=136} [2024-06-20 16:45:18,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-20 16:45:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 136 transitions, 1284 flow [2024-06-20 16:45:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:18,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:45:18,120 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)] === [2024-06-20 16:45:18,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1081665306, now seen corresponding path program 1 times [2024-06-20 16:45:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758926147] [2024-06-20 16:45:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:18,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:18,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758926147] [2024-06-20 16:45:18,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758926147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:18,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:18,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74027570] [2024-06-20 16:45:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:19,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:19,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 136 transitions, 1284 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:19,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:19,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:19,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:19,619 INFO L124 PetriNetUnfolderBase]: 2048/3023 cut-off events. [2024-06-20 16:45:19,620 INFO L125 PetriNetUnfolderBase]: For 37374/37386 co-relation queries the response was YES. [2024-06-20 16:45:19,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17940 conditions, 3023 events. 2048/3023 cut-off events. For 37374/37386 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13801 event pairs, 601 based on Foata normal form. 16/3035 useless extension candidates. Maximal degree in co-relation 17891. Up to 2820 conditions per place. [2024-06-20 16:45:19,641 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 119 selfloop transitions, 46 changer transitions 0/168 dead transitions. [2024-06-20 16:45:19,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 168 transitions, 1827 flow [2024-06-20 16:45:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:45:19,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:45:19,661 INFO L175 Difference]: Start difference. First operand has 101 places, 136 transitions, 1284 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:45:19,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 168 transitions, 1827 flow [2024-06-20 16:45:19,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 1721 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:19,700 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1376 flow [2024-06-20 16:45:19,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-20 16:45:19,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-20 16:45:19,701 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1376 flow [2024-06-20 16:45:19,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:19,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:19,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:19,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:45:19,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:19,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1081671103, now seen corresponding path program 2 times [2024-06-20 16:45:19,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:19,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242667272] [2024-06-20 16:45:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242667272] [2024-06-20 16:45:20,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242667272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:20,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:20,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758363561] [2024-06-20 16:45:20,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:20,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:20,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1376 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:20,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:20,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:20,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:21,132 INFO L124 PetriNetUnfolderBase]: 2553/3733 cut-off events. [2024-06-20 16:45:21,132 INFO L125 PetriNetUnfolderBase]: For 50824/50827 co-relation queries the response was YES. [2024-06-20 16:45:21,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23227 conditions, 3733 events. 2553/3733 cut-off events. For 50824/50827 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17539 event pairs, 579 based on Foata normal form. 10/3736 useless extension candidates. Maximal degree in co-relation 23176. Up to 2743 conditions per place. [2024-06-20 16:45:21,154 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 132 selfloop transitions, 70 changer transitions 0/205 dead transitions. [2024-06-20 16:45:21,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 205 transitions, 2402 flow [2024-06-20 16:45:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:45:21,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:45:21,156 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1376 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:45:21,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 205 transitions, 2402 flow [2024-06-20 16:45:21,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 205 transitions, 2262 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:45:21,202 INFO L231 Difference]: Finished difference. Result has 110 places, 163 transitions, 1740 flow [2024-06-20 16:45:21,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1740, PETRI_PLACES=110, PETRI_TRANSITIONS=163} [2024-06-20 16:45:21,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-20 16:45:21,203 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 163 transitions, 1740 flow [2024-06-20 16:45:21,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:21,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:21,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:21,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:45:21,204 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:21,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1081665523, now seen corresponding path program 3 times [2024-06-20 16:45:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634245733] [2024-06-20 16:45:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634245733] [2024-06-20 16:45:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634245733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:21,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:21,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923231543] [2024-06-20 16:45:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:21,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:21,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 163 transitions, 1740 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:21,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:21,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:21,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:22,691 INFO L124 PetriNetUnfolderBase]: 2641/3857 cut-off events. [2024-06-20 16:45:22,691 INFO L125 PetriNetUnfolderBase]: For 63480/63486 co-relation queries the response was YES. [2024-06-20 16:45:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26155 conditions, 3857 events. 2641/3857 cut-off events. For 63480/63486 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18180 event pairs, 551 based on Foata normal form. 22/3872 useless extension candidates. Maximal degree in co-relation 26101. Up to 2811 conditions per place. [2024-06-20 16:45:22,719 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 125 selfloop transitions, 88 changer transitions 0/216 dead transitions. [2024-06-20 16:45:22,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 216 transitions, 2700 flow [2024-06-20 16:45:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:45:22,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:45:22,720 INFO L175 Difference]: Start difference. First operand has 110 places, 163 transitions, 1740 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:45:22,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 216 transitions, 2700 flow [2024-06-20 16:45:22,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 216 transitions, 2547 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-20 16:45:22,778 INFO L231 Difference]: Finished difference. Result has 118 places, 178 transitions, 2117 flow [2024-06-20 16:45:22,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2117, PETRI_PLACES=118, PETRI_TRANSITIONS=178} [2024-06-20 16:45:22,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-20 16:45:22,778 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 178 transitions, 2117 flow [2024-06-20 16:45:22,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:22,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:22,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:22,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:45:22,779 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:22,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash -708618296, now seen corresponding path program 2 times [2024-06-20 16:45:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:22,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350769527] [2024-06-20 16:45:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:22,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:23,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:23,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350769527] [2024-06-20 16:45:23,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350769527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:23,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:23,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842960672] [2024-06-20 16:45:23,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:23,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:23,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:23,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 178 transitions, 2117 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:23,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:23,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:23,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:24,315 INFO L124 PetriNetUnfolderBase]: 2712/3961 cut-off events. [2024-06-20 16:45:24,315 INFO L125 PetriNetUnfolderBase]: For 70652/70658 co-relation queries the response was YES. [2024-06-20 16:45:24,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28152 conditions, 3961 events. 2712/3961 cut-off events. For 70652/70658 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18610 event pairs, 699 based on Foata normal form. 8/3962 useless extension candidates. Maximal degree in co-relation 28093. Up to 3602 conditions per place. [2024-06-20 16:45:24,342 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 180 selfloop transitions, 58 changer transitions 0/241 dead transitions. [2024-06-20 16:45:24,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 241 transitions, 3260 flow [2024-06-20 16:45:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:45:24,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:45:24,344 INFO L175 Difference]: Start difference. First operand has 118 places, 178 transitions, 2117 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:45:24,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 241 transitions, 3260 flow [2024-06-20 16:45:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3152 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:24,426 INFO L231 Difference]: Finished difference. Result has 126 places, 209 transitions, 2680 flow [2024-06-20 16:45:24,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2680, PETRI_PLACES=126, PETRI_TRANSITIONS=209} [2024-06-20 16:45:24,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 16:45:24,427 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 209 transitions, 2680 flow [2024-06-20 16:45:24,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:24,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:24,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:45:24,427 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:24,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash -708618513, now seen corresponding path program 4 times [2024-06-20 16:45:24,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:24,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885184172] [2024-06-20 16:45:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885184172] [2024-06-20 16:45:25,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885184172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:25,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:25,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:25,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232860177] [2024-06-20 16:45:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:25,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:25,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:25,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 209 transitions, 2680 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:25,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:25,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:25,859 INFO L124 PetriNetUnfolderBase]: 2740/4002 cut-off events. [2024-06-20 16:45:25,859 INFO L125 PetriNetUnfolderBase]: For 77830/77836 co-relation queries the response was YES. [2024-06-20 16:45:25,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29575 conditions, 4002 events. 2740/4002 cut-off events. For 77830/77836 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18783 event pairs, 650 based on Foata normal form. 10/4005 useless extension candidates. Maximal degree in co-relation 29511. Up to 3474 conditions per place. [2024-06-20 16:45:25,889 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 183 selfloop transitions, 71 changer transitions 0/257 dead transitions. [2024-06-20 16:45:25,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 257 transitions, 3667 flow [2024-06-20 16:45:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:45:25,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:45:25,891 INFO L175 Difference]: Start difference. First operand has 126 places, 209 transitions, 2680 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:45:25,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 257 transitions, 3667 flow [2024-06-20 16:45:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 257 transitions, 3529 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-06-20 16:45:25,990 INFO L231 Difference]: Finished difference. Result has 135 places, 223 transitions, 2970 flow [2024-06-20 16:45:25,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2970, PETRI_PLACES=135, PETRI_TRANSITIONS=223} [2024-06-20 16:45:25,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-20 16:45:25,991 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 223 transitions, 2970 flow [2024-06-20 16:45:25,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:25,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:45:25,992 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:25,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -708610856, now seen corresponding path program 3 times [2024-06-20 16:45:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890718555] [2024-06-20 16:45:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:26,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890718555] [2024-06-20 16:45:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890718555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:26,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:26,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627197280] [2024-06-20 16:45:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:26,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:26,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:26,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 223 transitions, 2970 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:26,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:26,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:26,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:27,678 INFO L124 PetriNetUnfolderBase]: 2729/3982 cut-off events. [2024-06-20 16:45:27,678 INFO L125 PetriNetUnfolderBase]: For 83787/83799 co-relation queries the response was YES. [2024-06-20 16:45:27,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30403 conditions, 3982 events. 2729/3982 cut-off events. For 83787/83799 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18692 event pairs, 680 based on Foata normal form. 10/3988 useless extension candidates. Maximal degree in co-relation 30334. Up to 3843 conditions per place. [2024-06-20 16:45:27,709 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 42 changer transitions 0/258 dead transitions. [2024-06-20 16:45:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 258 transitions, 3718 flow [2024-06-20 16:45:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:45:27,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-20 16:45:27,711 INFO L175 Difference]: Start difference. First operand has 135 places, 223 transitions, 2970 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:45:27,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 258 transitions, 3718 flow [2024-06-20 16:45:27,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 258 transitions, 3582 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 16:45:27,819 INFO L231 Difference]: Finished difference. Result has 141 places, 229 transitions, 3044 flow [2024-06-20 16:45:27,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3044, PETRI_PLACES=141, PETRI_TRANSITIONS=229} [2024-06-20 16:45:27,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-20 16:45:27,820 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 229 transitions, 3044 flow [2024-06-20 16:45:27,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:27,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:27,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:27,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:45:27,820 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:27,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash -715975743, now seen corresponding path program 5 times [2024-06-20 16:45:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092451255] [2024-06-20 16:45:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:28,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:28,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092451255] [2024-06-20 16:45:28,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092451255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:28,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:28,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:28,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576224143] [2024-06-20 16:45:28,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:28,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:28,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:28,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 229 transitions, 3044 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:28,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:28,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:29,438 INFO L124 PetriNetUnfolderBase]: 3031/4406 cut-off events. [2024-06-20 16:45:29,438 INFO L125 PetriNetUnfolderBase]: For 101257/101263 co-relation queries the response was YES. [2024-06-20 16:45:29,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34312 conditions, 4406 events. 3031/4406 cut-off events. For 101257/101263 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20901 event pairs, 673 based on Foata normal form. 12/4411 useless extension candidates. Maximal degree in co-relation 34241. Up to 3751 conditions per place. [2024-06-20 16:45:29,475 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 207 selfloop transitions, 87 changer transitions 0/297 dead transitions. [2024-06-20 16:45:29,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 297 transitions, 4346 flow [2024-06-20 16:45:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 16:45:29,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-20 16:45:29,478 INFO L175 Difference]: Start difference. First operand has 141 places, 229 transitions, 3044 flow. Second operand 10 states and 183 transitions. [2024-06-20 16:45:29,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 297 transitions, 4346 flow [2024-06-20 16:45:29,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 297 transitions, 4258 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:45:29,603 INFO L231 Difference]: Finished difference. Result has 147 places, 252 transitions, 3569 flow [2024-06-20 16:45:29,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3569, PETRI_PLACES=147, PETRI_TRANSITIONS=252} [2024-06-20 16:45:29,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-20 16:45:29,603 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 252 transitions, 3569 flow [2024-06-20 16:45:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:29,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:29,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:29,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:45:29,604 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:29,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash -715969946, now seen corresponding path program 4 times [2024-06-20 16:45:29,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:29,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005944127] [2024-06-20 16:45:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:29,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:30,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:30,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005944127] [2024-06-20 16:45:30,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005944127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:30,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:30,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219385307] [2024-06-20 16:45:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:30,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:30,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:30,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 252 transitions, 3569 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:30,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:30,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:30,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:31,354 INFO L124 PetriNetUnfolderBase]: 3091/4493 cut-off events. [2024-06-20 16:45:31,354 INFO L125 PetriNetUnfolderBase]: For 115197/115203 co-relation queries the response was YES. [2024-06-20 16:45:31,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36617 conditions, 4493 events. 3091/4493 cut-off events. For 115197/115203 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21417 event pairs, 665 based on Foata normal form. 17/4503 useless extension candidates. Maximal degree in co-relation 36543. Up to 3916 conditions per place. [2024-06-20 16:45:31,389 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 207 selfloop transitions, 88 changer transitions 0/298 dead transitions. [2024-06-20 16:45:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 298 transitions, 4622 flow [2024-06-20 16:45:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:45:31,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:45:31,391 INFO L175 Difference]: Start difference. First operand has 147 places, 252 transitions, 3569 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:45:31,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 298 transitions, 4622 flow [2024-06-20 16:45:31,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 298 transitions, 4321 flow, removed 139 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:31,534 INFO L231 Difference]: Finished difference. Result has 153 places, 263 transitions, 3702 flow [2024-06-20 16:45:31,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3702, PETRI_PLACES=153, PETRI_TRANSITIONS=263} [2024-06-20 16:45:31,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-20 16:45:31,534 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 263 transitions, 3702 flow [2024-06-20 16:45:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:31,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:31,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:31,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:45:31,535 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)] === [2024-06-20 16:45:31,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash -715970163, now seen corresponding path program 6 times [2024-06-20 16:45:31,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:31,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939547347] [2024-06-20 16:45:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:32,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939547347] [2024-06-20 16:45:32,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939547347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:32,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:32,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:32,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331376465] [2024-06-20 16:45:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:32,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:32,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:32,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 263 transitions, 3702 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:32,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:32,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:32,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:33,189 INFO L124 PetriNetUnfolderBase]: 3073/4469 cut-off events. [2024-06-20 16:45:33,189 INFO L125 PetriNetUnfolderBase]: For 116060/116066 co-relation queries the response was YES. [2024-06-20 16:45:33,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35862 conditions, 4469 events. 3073/4469 cut-off events. For 116060/116066 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21269 event pairs, 673 based on Foata normal form. 22/4484 useless extension candidates. Maximal degree in co-relation 35786. Up to 3789 conditions per place. [2024-06-20 16:45:33,232 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 200 selfloop transitions, 97 changer transitions 0/300 dead transitions. [2024-06-20 16:45:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 300 transitions, 4519 flow [2024-06-20 16:45:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:45:33,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:45:33,234 INFO L175 Difference]: Start difference. First operand has 153 places, 263 transitions, 3702 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:45:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 300 transitions, 4519 flow [2024-06-20 16:45:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 300 transitions, 4303 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-20 16:45:33,403 INFO L231 Difference]: Finished difference. Result has 158 places, 267 transitions, 3773 flow [2024-06-20 16:45:33,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3773, PETRI_PLACES=158, PETRI_TRANSITIONS=267} [2024-06-20 16:45:33,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-20 16:45:33,404 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 267 transitions, 3773 flow [2024-06-20 16:45:33,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:33,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:33,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:33,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:45:33,404 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:33,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1386909949, now seen corresponding path program 1 times [2024-06-20 16:45:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:33,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734632409] [2024-06-20 16:45:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:33,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:34,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:34,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734632409] [2024-06-20 16:45:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734632409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:34,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:34,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:45:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774711866] [2024-06-20 16:45:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:34,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:45:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:45:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:45:34,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:34,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 267 transitions, 3773 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:34,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:34,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:34,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:34,886 INFO L124 PetriNetUnfolderBase]: 3061/4450 cut-off events. [2024-06-20 16:45:34,886 INFO L125 PetriNetUnfolderBase]: For 114625/114637 co-relation queries the response was YES. [2024-06-20 16:45:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36100 conditions, 4450 events. 3061/4450 cut-off events. For 114625/114637 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21270 event pairs, 751 based on Foata normal form. 12/4458 useless extension candidates. Maximal degree in co-relation 36022. Up to 4401 conditions per place. [2024-06-20 16:45:34,924 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 259 selfloop transitions, 15 changer transitions 0/277 dead transitions. [2024-06-20 16:45:34,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 277 transitions, 4367 flow [2024-06-20 16:45:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:45:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:45:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-20 16:45:34,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-20 16:45:34,925 INFO L175 Difference]: Start difference. First operand has 158 places, 267 transitions, 3773 flow. Second operand 5 states and 81 transitions. [2024-06-20 16:45:34,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 277 transitions, 4367 flow [2024-06-20 16:45:35,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 277 transitions, 4117 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 16:45:35,086 INFO L231 Difference]: Finished difference. Result has 157 places, 269 transitions, 3593 flow [2024-06-20 16:45:35,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3593, PETRI_PLACES=157, PETRI_TRANSITIONS=269} [2024-06-20 16:45:35,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-20 16:45:35,087 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 269 transitions, 3593 flow [2024-06-20 16:45:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:35,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:35,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:35,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:45:35,087 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:35,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash 709782774, now seen corresponding path program 1 times [2024-06-20 16:45:35,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:35,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123016627] [2024-06-20 16:45:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:35,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:35,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:35,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123016627] [2024-06-20 16:45:35,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123016627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:35,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619394842] [2024-06-20 16:45:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:35,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:35,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:36,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:45:36,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 269 transitions, 3593 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:36,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:36,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:45:36,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:36,748 INFO L124 PetriNetUnfolderBase]: 3013/4397 cut-off events. [2024-06-20 16:45:36,749 INFO L125 PetriNetUnfolderBase]: For 124268/124329 co-relation queries the response was YES. [2024-06-20 16:45:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35590 conditions, 4397 events. 3013/4397 cut-off events. For 124268/124329 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21208 event pairs, 589 based on Foata normal form. 18/4363 useless extension candidates. Maximal degree in co-relation 35511. Up to 4163 conditions per place. [2024-06-20 16:45:36,788 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 238 selfloop transitions, 20 changer transitions 0/295 dead transitions. [2024-06-20 16:45:36,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 295 transitions, 4221 flow [2024-06-20 16:45:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:45:36,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:45:36,790 INFO L175 Difference]: Start difference. First operand has 157 places, 269 transitions, 3593 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:45:36,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 295 transitions, 4221 flow [2024-06-20 16:45:36,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 295 transitions, 4185 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:36,954 INFO L231 Difference]: Finished difference. Result has 161 places, 271 transitions, 3660 flow [2024-06-20 16:45:36,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3660, PETRI_PLACES=161, PETRI_TRANSITIONS=271} [2024-06-20 16:45:36,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-20 16:45:36,955 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 271 transitions, 3660 flow [2024-06-20 16:45:36,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:36,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:36,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:45:36,956 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:36,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash 709843348, now seen corresponding path program 1 times [2024-06-20 16:45:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369000099] [2024-06-20 16:45:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:37,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:37,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369000099] [2024-06-20 16:45:37,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369000099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:37,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:37,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:37,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967732807] [2024-06-20 16:45:37,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:37,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:37,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:38,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:38,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 271 transitions, 3660 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:38,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:38,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:38,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:39,072 INFO L124 PetriNetUnfolderBase]: 3075/4475 cut-off events. [2024-06-20 16:45:39,072 INFO L125 PetriNetUnfolderBase]: For 125990/126002 co-relation queries the response was YES. [2024-06-20 16:45:39,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36233 conditions, 4475 events. 3075/4475 cut-off events. For 125990/126002 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21433 event pairs, 680 based on Foata normal form. 14/4485 useless extension candidates. Maximal degree in co-relation 36153. Up to 4142 conditions per place. [2024-06-20 16:45:39,107 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 250 selfloop transitions, 60 changer transitions 0/313 dead transitions. [2024-06-20 16:45:39,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 313 transitions, 4650 flow [2024-06-20 16:45:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:45:39,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:45:39,108 INFO L175 Difference]: Start difference. First operand has 161 places, 271 transitions, 3660 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:45:39,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 313 transitions, 4650 flow [2024-06-20 16:45:39,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 313 transitions, 4565 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:39,243 INFO L231 Difference]: Finished difference. Result has 166 places, 279 transitions, 3909 flow [2024-06-20 16:45:39,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3909, PETRI_PLACES=166, PETRI_TRANSITIONS=279} [2024-06-20 16:45:39,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 16:45:39,245 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 279 transitions, 3909 flow [2024-06-20 16:45:39,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:39,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:39,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:45:39,245 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:39,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 709843224, now seen corresponding path program 2 times [2024-06-20 16:45:39,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:39,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033104187] [2024-06-20 16:45:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:39,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033104187] [2024-06-20 16:45:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033104187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:40,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302941493] [2024-06-20 16:45:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:40,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:40,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:45:40,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 279 transitions, 3909 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:40,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:40,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:45:40,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:41,105 INFO L124 PetriNetUnfolderBase]: 3016/4409 cut-off events. [2024-06-20 16:45:41,105 INFO L125 PetriNetUnfolderBase]: For 140723/140787 co-relation queries the response was YES. [2024-06-20 16:45:41,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36796 conditions, 4409 events. 3016/4409 cut-off events. For 140723/140787 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21341 event pairs, 665 based on Foata normal form. 16/4374 useless extension candidates. Maximal degree in co-relation 36714. Up to 4162 conditions per place. [2024-06-20 16:45:41,145 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 236 selfloop transitions, 32 changer transitions 0/305 dead transitions. [2024-06-20 16:45:41,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 305 transitions, 4565 flow [2024-06-20 16:45:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:45:41,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-20 16:45:41,147 INFO L175 Difference]: Start difference. First operand has 166 places, 279 transitions, 3909 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:45:41,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 305 transitions, 4565 flow [2024-06-20 16:45:41,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 305 transitions, 4452 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 16:45:41,318 INFO L231 Difference]: Finished difference. Result has 169 places, 281 transitions, 3932 flow [2024-06-20 16:45:41,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3932, PETRI_PLACES=169, PETRI_TRANSITIONS=281} [2024-06-20 16:45:41,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-20 16:45:41,318 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 281 transitions, 3932 flow [2024-06-20 16:45:41,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:41,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:41,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:41,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:45:41,319 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:41,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1758508190, now seen corresponding path program 1 times [2024-06-20 16:45:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:41,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304412042] [2024-06-20 16:45:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:42,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304412042] [2024-06-20 16:45:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304412042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:42,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:42,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295101996] [2024-06-20 16:45:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:42,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:42,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:42,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 281 transitions, 3932 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:43,111 INFO L124 PetriNetUnfolderBase]: 3160/4602 cut-off events. [2024-06-20 16:45:43,111 INFO L125 PetriNetUnfolderBase]: For 146792/146807 co-relation queries the response was YES. [2024-06-20 16:45:43,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38375 conditions, 4602 events. 3160/4602 cut-off events. For 146792/146807 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22192 event pairs, 697 based on Foata normal form. 20/4616 useless extension candidates. Maximal degree in co-relation 38291. Up to 4282 conditions per place. [2024-06-20 16:45:43,153 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 272 selfloop transitions, 54 changer transitions 0/329 dead transitions. [2024-06-20 16:45:43,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 329 transitions, 5033 flow [2024-06-20 16:45:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:45:43,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 16:45:43,155 INFO L175 Difference]: Start difference. First operand has 169 places, 281 transitions, 3932 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:45:43,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 329 transitions, 5033 flow [2024-06-20 16:45:43,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 329 transitions, 4933 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:43,329 INFO L231 Difference]: Finished difference. Result has 174 places, 288 transitions, 4110 flow [2024-06-20 16:45:43,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4110, PETRI_PLACES=174, PETRI_TRANSITIONS=288} [2024-06-20 16:45:43,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-20 16:45:43,334 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 288 transitions, 4110 flow [2024-06-20 16:45:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:43,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:43,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:43,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:45:43,335 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)] === [2024-06-20 16:45:43,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash 827935864, now seen corresponding path program 2 times [2024-06-20 16:45:43,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:43,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480963522] [2024-06-20 16:45:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:43,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:44,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:44,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480963522] [2024-06-20 16:45:44,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480963522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:44,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:44,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780019953] [2024-06-20 16:45:44,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:44,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:44,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:44,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 288 transitions, 4110 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:45,620 INFO L124 PetriNetUnfolderBase]: 3138/4575 cut-off events. [2024-06-20 16:45:45,621 INFO L125 PetriNetUnfolderBase]: For 150416/150422 co-relation queries the response was YES. [2024-06-20 16:45:45,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38286 conditions, 4575 events. 3138/4575 cut-off events. For 150416/150422 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22102 event pairs, 629 based on Foata normal form. 14/4582 useless extension candidates. Maximal degree in co-relation 38201. Up to 3649 conditions per place. [2024-06-20 16:45:45,669 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 199 selfloop transitions, 139 changer transitions 0/341 dead transitions. [2024-06-20 16:45:45,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 341 transitions, 5308 flow [2024-06-20 16:45:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:45:45,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-20 16:45:45,670 INFO L175 Difference]: Start difference. First operand has 174 places, 288 transitions, 4110 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:45:45,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 341 transitions, 5308 flow [2024-06-20 16:45:45,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 341 transitions, 5129 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 16:45:45,939 INFO L231 Difference]: Finished difference. Result has 177 places, 299 transitions, 4545 flow [2024-06-20 16:45:45,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4545, PETRI_PLACES=177, PETRI_TRANSITIONS=299} [2024-06-20 16:45:45,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-20 16:45:45,941 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 299 transitions, 4545 flow [2024-06-20 16:45:45,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:45,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:45,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:45,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:45:45,942 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)] === [2024-06-20 16:45:45,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash 827930904, now seen corresponding path program 3 times [2024-06-20 16:45:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:45,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160116596] [2024-06-20 16:45:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:46,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160116596] [2024-06-20 16:45:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160116596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:46,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937517654] [2024-06-20 16:45:46,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:46,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:45:46,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 299 transitions, 4545 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:46,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:46,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:45:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:47,828 INFO L124 PetriNetUnfolderBase]: 3048/4460 cut-off events. [2024-06-20 16:45:47,828 INFO L125 PetriNetUnfolderBase]: For 161385/161433 co-relation queries the response was YES. [2024-06-20 16:45:47,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39036 conditions, 4460 events. 3048/4460 cut-off events. For 161385/161433 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21571 event pairs, 611 based on Foata normal form. 10/4414 useless extension candidates. Maximal degree in co-relation 38948. Up to 4123 conditions per place. [2024-06-20 16:45:47,869 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 230 selfloop transitions, 55 changer transitions 0/323 dead transitions. [2024-06-20 16:45:47,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 323 transitions, 5237 flow [2024-06-20 16:45:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:45:47,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 16:45:47,878 INFO L175 Difference]: Start difference. First operand has 177 places, 299 transitions, 4545 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:45:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 323 transitions, 5237 flow [2024-06-20 16:45:48,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 323 transitions, 5057 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 16:45:48,115 INFO L231 Difference]: Finished difference. Result has 180 places, 301 transitions, 4550 flow [2024-06-20 16:45:48,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4550, PETRI_PLACES=180, PETRI_TRANSITIONS=301} [2024-06-20 16:45:48,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-20 16:45:48,116 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 301 transitions, 4550 flow [2024-06-20 16:45:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:48,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:48,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:48,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:45:48,116 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)] === [2024-06-20 16:45:48,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash 828115602, now seen corresponding path program 1 times [2024-06-20 16:45:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572056057] [2024-06-20 16:45:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572056057] [2024-06-20 16:45:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572056057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:49,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:49,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296829543] [2024-06-20 16:45:49,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:49,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:49,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 301 transitions, 4550 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:49,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:50,513 INFO L124 PetriNetUnfolderBase]: 3256/4762 cut-off events. [2024-06-20 16:45:50,514 INFO L125 PetriNetUnfolderBase]: For 180431/180443 co-relation queries the response was YES. [2024-06-20 16:45:50,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40975 conditions, 4762 events. 3256/4762 cut-off events. For 180431/180443 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23323 event pairs, 659 based on Foata normal form. 36/4794 useless extension candidates. Maximal degree in co-relation 40886. Up to 4399 conditions per place. [2024-06-20 16:45:50,560 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 282 selfloop transitions, 54 changer transitions 0/339 dead transitions. [2024-06-20 16:45:50,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 339 transitions, 5520 flow [2024-06-20 16:45:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:45:50,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-20 16:45:50,562 INFO L175 Difference]: Start difference. First operand has 180 places, 301 transitions, 4550 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:45:50,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 339 transitions, 5520 flow [2024-06-20 16:45:50,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 339 transitions, 5382 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 16:45:50,786 INFO L231 Difference]: Finished difference. Result has 185 places, 305 transitions, 4652 flow [2024-06-20 16:45:50,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4652, PETRI_PLACES=185, PETRI_TRANSITIONS=305} [2024-06-20 16:45:50,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-20 16:45:50,787 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 305 transitions, 4652 flow [2024-06-20 16:45:50,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:50,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:50,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:50,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:45:50,788 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)] === [2024-06-20 16:45:50,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash -720230126, now seen corresponding path program 2 times [2024-06-20 16:45:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:50,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86084571] [2024-06-20 16:45:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:51,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86084571] [2024-06-20 16:45:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86084571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:51,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:51,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487562523] [2024-06-20 16:45:51,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:51,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:51,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:51,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:51,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 305 transitions, 4652 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:51,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:51,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:51,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:52,731 INFO L124 PetriNetUnfolderBase]: 3341/4897 cut-off events. [2024-06-20 16:45:52,731 INFO L125 PetriNetUnfolderBase]: For 190942/190954 co-relation queries the response was YES. [2024-06-20 16:45:52,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42825 conditions, 4897 events. 3341/4897 cut-off events. For 190942/190954 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24178 event pairs, 751 based on Foata normal form. 26/4919 useless extension candidates. Maximal degree in co-relation 42735. Up to 4654 conditions per place. [2024-06-20 16:45:52,781 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 301 selfloop transitions, 45 changer transitions 0/349 dead transitions. [2024-06-20 16:45:52,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 349 transitions, 5678 flow [2024-06-20 16:45:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 16:45:52,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 16:45:52,797 INFO L175 Difference]: Start difference. First operand has 185 places, 305 transitions, 4652 flow. Second operand 10 states and 168 transitions. [2024-06-20 16:45:52,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 349 transitions, 5678 flow [2024-06-20 16:45:53,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 349 transitions, 5508 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 16:45:53,084 INFO L231 Difference]: Finished difference. Result has 189 places, 311 transitions, 4724 flow [2024-06-20 16:45:53,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4724, PETRI_PLACES=189, PETRI_TRANSITIONS=311} [2024-06-20 16:45:53,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-20 16:45:53,085 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 311 transitions, 4724 flow [2024-06-20 16:45:53,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:53,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:53,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:53,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:45:53,086 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)] === [2024-06-20 16:45:53,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -483758096, now seen corresponding path program 3 times [2024-06-20 16:45:53,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:53,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66954825] [2024-06-20 16:45:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:53,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:53,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66954825] [2024-06-20 16:45:53,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66954825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:53,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:53,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450050876] [2024-06-20 16:45:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:53,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:54,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:54,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 311 transitions, 4724 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:54,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:54,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:54,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:55,008 INFO L124 PetriNetUnfolderBase]: 3469/5108 cut-off events. [2024-06-20 16:45:55,009 INFO L125 PetriNetUnfolderBase]: For 202777/202783 co-relation queries the response was YES. [2024-06-20 16:45:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44605 conditions, 5108 events. 3469/5108 cut-off events. For 202777/202783 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25622 event pairs, 656 based on Foata normal form. 6/5107 useless extension candidates. Maximal degree in co-relation 44513. Up to 4309 conditions per place. [2024-06-20 16:45:55,062 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 260 selfloop transitions, 93 changer transitions 0/356 dead transitions. [2024-06-20 16:45:55,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 356 transitions, 5858 flow [2024-06-20 16:45:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:45:55,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:45:55,064 INFO L175 Difference]: Start difference. First operand has 189 places, 311 transitions, 4724 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:45:55,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 356 transitions, 5858 flow [2024-06-20 16:45:55,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 356 transitions, 5717 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:45:55,376 INFO L231 Difference]: Finished difference. Result has 193 places, 317 transitions, 4968 flow [2024-06-20 16:45:55,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4968, PETRI_PLACES=193, PETRI_TRANSITIONS=317} [2024-06-20 16:45:55,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-20 16:45:55,377 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 317 transitions, 4968 flow [2024-06-20 16:45:55,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:55,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:55,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:45:55,377 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:55,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -484054766, now seen corresponding path program 4 times [2024-06-20 16:45:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:55,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351969980] [2024-06-20 16:45:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:56,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351969980] [2024-06-20 16:45:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351969980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:56,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:56,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914035760] [2024-06-20 16:45:56,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:56,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:56,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:56,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 317 transitions, 4968 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:56,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:56,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:56,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:57,227 INFO L124 PetriNetUnfolderBase]: 3486/5135 cut-off events. [2024-06-20 16:45:57,227 INFO L125 PetriNetUnfolderBase]: For 212185/212191 co-relation queries the response was YES. [2024-06-20 16:45:57,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45316 conditions, 5135 events. 3486/5135 cut-off events. For 212185/212191 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25792 event pairs, 715 based on Foata normal form. 6/5134 useless extension candidates. Maximal degree in co-relation 45222. Up to 4635 conditions per place. [2024-06-20 16:45:57,283 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 262 selfloop transitions, 86 changer transitions 0/351 dead transitions. [2024-06-20 16:45:57,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 351 transitions, 5823 flow [2024-06-20 16:45:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:45:57,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 16:45:57,285 INFO L175 Difference]: Start difference. First operand has 193 places, 317 transitions, 4968 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:45:57,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 351 transitions, 5823 flow [2024-06-20 16:45:57,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 351 transitions, 5620 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:57,649 INFO L231 Difference]: Finished difference. Result has 197 places, 319 transitions, 5014 flow [2024-06-20 16:45:57,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4789, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5014, PETRI_PLACES=197, PETRI_TRANSITIONS=319} [2024-06-20 16:45:57,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-20 16:45:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 319 transitions, 5014 flow [2024-06-20 16:45:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:57,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:57,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:45:57,650 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:57,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash -492328976, now seen corresponding path program 5 times [2024-06-20 16:45:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895668397] [2024-06-20 16:45:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:58,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:58,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895668397] [2024-06-20 16:45:58,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895668397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:58,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:58,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50801653] [2024-06-20 16:45:58,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:58,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:58,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:45:58,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 319 transitions, 5014 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:58,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:58,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:45:58,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:59,604 INFO L124 PetriNetUnfolderBase]: 3478/5120 cut-off events. [2024-06-20 16:45:59,605 INFO L125 PetriNetUnfolderBase]: For 213412/213424 co-relation queries the response was YES. [2024-06-20 16:45:59,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45064 conditions, 5120 events. 3478/5120 cut-off events. For 213412/213424 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25766 event pairs, 771 based on Foata normal form. 12/5128 useless extension candidates. Maximal degree in co-relation 44969. Up to 5001 conditions per place. [2024-06-20 16:45:59,659 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 32 changer transitions 0/348 dead transitions. [2024-06-20 16:45:59,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 348 transitions, 5801 flow [2024-06-20 16:45:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:45:59,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:45:59,661 INFO L175 Difference]: Start difference. First operand has 197 places, 319 transitions, 5014 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:45:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 348 transitions, 5801 flow [2024-06-20 16:46:00,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 348 transitions, 5618 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:00,021 INFO L231 Difference]: Finished difference. Result has 201 places, 320 transitions, 4931 flow [2024-06-20 16:46:00,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4931, PETRI_PLACES=201, PETRI_TRANSITIONS=320} [2024-06-20 16:46:00,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-20 16:46:00,022 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 320 transitions, 4931 flow [2024-06-20 16:46:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:00,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:00,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:46:00,022 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:00,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1317007446, now seen corresponding path program 1 times [2024-06-20 16:46:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:00,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974730401] [2024-06-20 16:46:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:01,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974730401] [2024-06-20 16:46:01,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974730401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37441752] [2024-06-20 16:46:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:01,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:01,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 320 transitions, 4931 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:01,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:01,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:01,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:02,427 INFO L124 PetriNetUnfolderBase]: 3769/5565 cut-off events. [2024-06-20 16:46:02,427 INFO L125 PetriNetUnfolderBase]: For 252690/252702 co-relation queries the response was YES. [2024-06-20 16:46:02,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48998 conditions, 5565 events. 3769/5565 cut-off events. For 252690/252702 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28660 event pairs, 636 based on Foata normal form. 26/5587 useless extension candidates. Maximal degree in co-relation 48902. Up to 5008 conditions per place. [2024-06-20 16:46:02,488 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 340 selfloop transitions, 40 changer transitions 0/383 dead transitions. [2024-06-20 16:46:02,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 383 transitions, 6385 flow [2024-06-20 16:46:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 16:46:02,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-20 16:46:02,490 INFO L175 Difference]: Start difference. First operand has 201 places, 320 transitions, 4931 flow. Second operand 10 states and 178 transitions. [2024-06-20 16:46:02,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 383 transitions, 6385 flow [2024-06-20 16:46:02,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 383 transitions, 6284 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:46:02,923 INFO L231 Difference]: Finished difference. Result has 206 places, 332 transitions, 5204 flow [2024-06-20 16:46:02,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5204, PETRI_PLACES=206, PETRI_TRANSITIONS=332} [2024-06-20 16:46:02,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 16:46:02,924 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 332 transitions, 5204 flow [2024-06-20 16:46:02,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:02,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:02,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:02,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:46:02,925 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:02,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 530305122, now seen corresponding path program 2 times [2024-06-20 16:46:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369049731] [2024-06-20 16:46:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:03,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369049731] [2024-06-20 16:46:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369049731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:03,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:03,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55909892] [2024-06-20 16:46:03,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:03,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:04,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:04,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 332 transitions, 5204 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:04,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:04,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:04,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:05,335 INFO L124 PetriNetUnfolderBase]: 4044/5986 cut-off events. [2024-06-20 16:46:05,336 INFO L125 PetriNetUnfolderBase]: For 300755/300767 co-relation queries the response was YES. [2024-06-20 16:46:05,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55063 conditions, 5986 events. 4044/5986 cut-off events. For 300755/300767 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31361 event pairs, 850 based on Foata normal form. 26/6008 useless extension candidates. Maximal degree in co-relation 54964. Up to 5228 conditions per place. [2024-06-20 16:46:05,402 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 329 selfloop transitions, 59 changer transitions 0/391 dead transitions. [2024-06-20 16:46:05,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 391 transitions, 6754 flow [2024-06-20 16:46:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 16:46:05,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-20 16:46:05,403 INFO L175 Difference]: Start difference. First operand has 206 places, 332 transitions, 5204 flow. Second operand 10 states and 178 transitions. [2024-06-20 16:46:05,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 391 transitions, 6754 flow [2024-06-20 16:46:05,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 391 transitions, 6598 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:05,917 INFO L231 Difference]: Finished difference. Result has 212 places, 339 transitions, 5404 flow [2024-06-20 16:46:05,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5404, PETRI_PLACES=212, PETRI_TRANSITIONS=339} [2024-06-20 16:46:05,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 16:46:05,918 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 339 transitions, 5404 flow [2024-06-20 16:46:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:05,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:05,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:46:05,919 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 613425732, now seen corresponding path program 3 times [2024-06-20 16:46:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:05,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139665656] [2024-06-20 16:46:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:06,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:06,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139665656] [2024-06-20 16:46:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139665656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:06,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:06,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:06,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50657771] [2024-06-20 16:46:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:06,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:06,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:06,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:06,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:06,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 339 transitions, 5404 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:06,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:06,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:06,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:08,302 INFO L124 PetriNetUnfolderBase]: 4091/6063 cut-off events. [2024-06-20 16:46:08,302 INFO L125 PetriNetUnfolderBase]: For 314004/314016 co-relation queries the response was YES. [2024-06-20 16:46:08,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55861 conditions, 6063 events. 4091/6063 cut-off events. For 314004/314016 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31869 event pairs, 891 based on Foata normal form. 26/6085 useless extension candidates. Maximal degree in co-relation 55759. Up to 5615 conditions per place. [2024-06-20 16:46:08,484 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 320 selfloop transitions, 63 changer transitions 0/386 dead transitions. [2024-06-20 16:46:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 386 transitions, 6624 flow [2024-06-20 16:46:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:46:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 16:46:08,485 INFO L175 Difference]: Start difference. First operand has 212 places, 339 transitions, 5404 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:46:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 386 transitions, 6624 flow [2024-06-20 16:46:08,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 386 transitions, 6420 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:08,918 INFO L231 Difference]: Finished difference. Result has 216 places, 342 transitions, 5457 flow [2024-06-20 16:46:08,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5457, PETRI_PLACES=216, PETRI_TRANSITIONS=342} [2024-06-20 16:46:08,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 16:46:08,919 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 342 transitions, 5457 flow [2024-06-20 16:46:08,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:08,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:08,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:08,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:46:08,920 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:08,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash 617150754, now seen corresponding path program 1 times [2024-06-20 16:46:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883567704] [2024-06-20 16:46:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:09,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883567704] [2024-06-20 16:46:09,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883567704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:09,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:09,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724154024] [2024-06-20 16:46:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:09,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:09,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 342 transitions, 5457 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:09,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:09,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:09,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:11,476 INFO L124 PetriNetUnfolderBase]: 4466/6691 cut-off events. [2024-06-20 16:46:11,476 INFO L125 PetriNetUnfolderBase]: For 381745/381751 co-relation queries the response was YES. [2024-06-20 16:46:11,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59232 conditions, 6691 events. 4466/6691 cut-off events. For 381745/381751 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36297 event pairs, 888 based on Foata normal form. 92/6776 useless extension candidates. Maximal degree in co-relation 59128. Up to 5011 conditions per place. [2024-06-20 16:46:11,542 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 248 selfloop transitions, 143 changer transitions 0/394 dead transitions. [2024-06-20 16:46:11,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 394 transitions, 6852 flow [2024-06-20 16:46:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:46:11,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-20 16:46:11,544 INFO L175 Difference]: Start difference. First operand has 216 places, 342 transitions, 5457 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:46:11,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 394 transitions, 6852 flow [2024-06-20 16:46:12,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 394 transitions, 6714 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:12,062 INFO L231 Difference]: Finished difference. Result has 219 places, 346 transitions, 5769 flow [2024-06-20 16:46:12,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5769, PETRI_PLACES=219, PETRI_TRANSITIONS=346} [2024-06-20 16:46:12,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-20 16:46:12,064 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 346 transitions, 5769 flow [2024-06-20 16:46:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:12,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:12,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:12,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:46:12,065 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:12,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:12,065 INFO L85 PathProgramCache]: Analyzing trace with hash -103940374, now seen corresponding path program 4 times [2024-06-20 16:46:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:12,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840215489] [2024-06-20 16:46:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:12,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:13,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:13,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840215489] [2024-06-20 16:46:13,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840215489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:13,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:13,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422406984] [2024-06-20 16:46:13,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:13,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:13,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 346 transitions, 5769 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:13,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:13,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:13,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:14,647 INFO L124 PetriNetUnfolderBase]: 4551/6826 cut-off events. [2024-06-20 16:46:14,648 INFO L125 PetriNetUnfolderBase]: For 354512/354518 co-relation queries the response was YES. [2024-06-20 16:46:14,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61757 conditions, 6826 events. 4551/6826 cut-off events. For 354512/354518 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 37212 event pairs, 1021 based on Foata normal form. 20/6839 useless extension candidates. Maximal degree in co-relation 61652. Up to 5686 conditions per place. [2024-06-20 16:46:14,724 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 265 selfloop transitions, 126 changer transitions 0/394 dead transitions. [2024-06-20 16:46:14,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 394 transitions, 7121 flow [2024-06-20 16:46:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:46:14,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-20 16:46:14,725 INFO L175 Difference]: Start difference. First operand has 219 places, 346 transitions, 5769 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:46:14,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 394 transitions, 7121 flow [2024-06-20 16:46:15,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 394 transitions, 6742 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 16:46:15,354 INFO L231 Difference]: Finished difference. Result has 221 places, 349 transitions, 5772 flow [2024-06-20 16:46:15,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5772, PETRI_PLACES=221, PETRI_TRANSITIONS=349} [2024-06-20 16:46:15,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 16:46:15,355 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 349 transitions, 5772 flow [2024-06-20 16:46:15,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:15,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:15,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:15,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:46:15,357 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:15,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash -98218642, now seen corresponding path program 2 times [2024-06-20 16:46:15,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:15,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895534129] [2024-06-20 16:46:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:16,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:16,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895534129] [2024-06-20 16:46:16,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895534129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:16,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:16,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955823748] [2024-06-20 16:46:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:16,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:16,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:16,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:16,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 349 transitions, 5772 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:16,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:16,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:16,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:17,854 INFO L124 PetriNetUnfolderBase]: 5445/8256 cut-off events. [2024-06-20 16:46:17,854 INFO L125 PetriNetUnfolderBase]: For 523527/523533 co-relation queries the response was YES. [2024-06-20 16:46:17,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75141 conditions, 8256 events. 5445/8256 cut-off events. For 523527/523533 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47347 event pairs, 1083 based on Foata normal form. 74/8323 useless extension candidates. Maximal degree in co-relation 75035. Up to 4652 conditions per place. [2024-06-20 16:46:17,955 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 260 selfloop transitions, 149 changer transitions 0/412 dead transitions. [2024-06-20 16:46:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 412 transitions, 7576 flow [2024-06-20 16:46:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:46:17,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:46:17,957 INFO L175 Difference]: Start difference. First operand has 221 places, 349 transitions, 5772 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:46:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 412 transitions, 7576 flow [2024-06-20 16:46:18,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 412 transitions, 7248 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:46:18,793 INFO L231 Difference]: Finished difference. Result has 224 places, 356 transitions, 6080 flow [2024-06-20 16:46:18,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6080, PETRI_PLACES=224, PETRI_TRANSITIONS=356} [2024-06-20 16:46:18,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 16:46:18,794 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 356 transitions, 6080 flow [2024-06-20 16:46:18,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:18,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:18,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:18,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:46:18,795 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)] === [2024-06-20 16:46:18,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -103944094, now seen corresponding path program 5 times [2024-06-20 16:46:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:18,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826023450] [2024-06-20 16:46:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826023450] [2024-06-20 16:46:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826023450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:19,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802549088] [2024-06-20 16:46:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:19,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:19,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 356 transitions, 6080 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:19,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:19,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:21,962 INFO L124 PetriNetUnfolderBase]: 6205/9452 cut-off events. [2024-06-20 16:46:21,962 INFO L125 PetriNetUnfolderBase]: For 628676/628682 co-relation queries the response was YES. [2024-06-20 16:46:22,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88452 conditions, 9452 events. 6205/9452 cut-off events. For 628676/628682 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 55983 event pairs, 1620 based on Foata normal form. 20/9465 useless extension candidates. Maximal degree in co-relation 88344. Up to 6821 conditions per place. [2024-06-20 16:46:22,078 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 287 selfloop transitions, 129 changer transitions 0/419 dead transitions. [2024-06-20 16:46:22,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 419 transitions, 7940 flow [2024-06-20 16:46:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:46:22,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-20 16:46:22,080 INFO L175 Difference]: Start difference. First operand has 224 places, 356 transitions, 6080 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:46:22,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 419 transitions, 7940 flow [2024-06-20 16:46:23,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 419 transitions, 7560 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:23,117 INFO L231 Difference]: Finished difference. Result has 228 places, 364 transitions, 6286 flow [2024-06-20 16:46:23,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6286, PETRI_PLACES=228, PETRI_TRANSITIONS=364} [2024-06-20 16:46:23,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-20 16:46:23,119 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 364 transitions, 6286 flow [2024-06-20 16:46:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:23,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:23,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:23,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:46:23,122 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)] === [2024-06-20 16:46:23,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash -98226082, now seen corresponding path program 3 times [2024-06-20 16:46:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:23,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929619801] [2024-06-20 16:46:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:24,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:24,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929619801] [2024-06-20 16:46:24,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929619801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:24,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:24,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:24,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102584213] [2024-06-20 16:46:24,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:24,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:24,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:24,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:24,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 364 transitions, 6286 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:24,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:24,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:24,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:26,045 INFO L124 PetriNetUnfolderBase]: 6077/9288 cut-off events. [2024-06-20 16:46:26,046 INFO L125 PetriNetUnfolderBase]: For 626931/626937 co-relation queries the response was YES. [2024-06-20 16:46:26,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83728 conditions, 9288 events. 6077/9288 cut-off events. For 626931/626937 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 55072 event pairs, 1684 based on Foata normal form. 94/9375 useless extension candidates. Maximal degree in co-relation 83618. Up to 7642 conditions per place. [2024-06-20 16:46:26,164 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 272 selfloop transitions, 138 changer transitions 0/413 dead transitions. [2024-06-20 16:46:26,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 413 transitions, 7682 flow [2024-06-20 16:46:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:46:26,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-20 16:46:26,165 INFO L175 Difference]: Start difference. First operand has 228 places, 364 transitions, 6286 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:46:26,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 413 transitions, 7682 flow [2024-06-20 16:46:27,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 413 transitions, 7321 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:27,428 INFO L231 Difference]: Finished difference. Result has 231 places, 366 transitions, 6306 flow [2024-06-20 16:46:27,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6306, PETRI_PLACES=231, PETRI_TRANSITIONS=366} [2024-06-20 16:46:27,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-20 16:46:27,428 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 366 transitions, 6306 flow [2024-06-20 16:46:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:27,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:27,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:46:27,429 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:27,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -858017686, now seen corresponding path program 6 times [2024-06-20 16:46:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:27,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410138822] [2024-06-20 16:46:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:28,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:28,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410138822] [2024-06-20 16:46:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410138822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601046901] [2024-06-20 16:46:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:28,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:28,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:28,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:28,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 366 transitions, 6306 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:28,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:28,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:28,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:30,686 INFO L124 PetriNetUnfolderBase]: 6162/9423 cut-off events. [2024-06-20 16:46:30,687 INFO L125 PetriNetUnfolderBase]: For 572404/572410 co-relation queries the response was YES. [2024-06-20 16:46:30,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84310 conditions, 9423 events. 6162/9423 cut-off events. For 572404/572410 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 56594 event pairs, 1830 based on Foata normal form. 20/9436 useless extension candidates. Maximal degree in co-relation 84199. Up to 8647 conditions per place. [2024-06-20 16:46:30,788 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 313 selfloop transitions, 104 changer transitions 0/420 dead transitions. [2024-06-20 16:46:30,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 420 transitions, 7646 flow [2024-06-20 16:46:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:46:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:46:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-20 16:46:30,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-20 16:46:30,790 INFO L175 Difference]: Start difference. First operand has 231 places, 366 transitions, 6306 flow. Second operand 11 states and 201 transitions. [2024-06-20 16:46:30,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 420 transitions, 7646 flow [2024-06-20 16:46:31,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 420 transitions, 7323 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 16:46:31,737 INFO L231 Difference]: Finished difference. Result has 235 places, 369 transitions, 6333 flow [2024-06-20 16:46:31,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6333, PETRI_PLACES=235, PETRI_TRANSITIONS=369} [2024-06-20 16:46:31,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 16:46:31,738 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 369 transitions, 6333 flow [2024-06-20 16:46:31,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:31,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:31,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:31,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:46:31,739 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:31,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2120801826, now seen corresponding path program 4 times [2024-06-20 16:46:31,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:31,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357683943] [2024-06-20 16:46:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:31,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:32,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:32,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357683943] [2024-06-20 16:46:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357683943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:32,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215369607] [2024-06-20 16:46:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:32,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:32,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:32,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 369 transitions, 6333 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:32,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:32,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:32,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:34,509 INFO L124 PetriNetUnfolderBase]: 6254/9575 cut-off events. [2024-06-20 16:46:34,509 INFO L125 PetriNetUnfolderBase]: For 594765/594771 co-relation queries the response was YES. [2024-06-20 16:46:34,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85214 conditions, 9575 events. 6254/9575 cut-off events. For 594765/594771 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 57776 event pairs, 1817 based on Foata normal form. 26/9594 useless extension candidates. Maximal degree in co-relation 85102. Up to 8896 conditions per place. [2024-06-20 16:46:34,632 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 320 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-20 16:46:34,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 408 transitions, 7368 flow [2024-06-20 16:46:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:46:34,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:46:34,633 INFO L175 Difference]: Start difference. First operand has 235 places, 369 transitions, 6333 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:46:34,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 408 transitions, 7368 flow [2024-06-20 16:46:35,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 408 transitions, 7072 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-20 16:46:35,841 INFO L231 Difference]: Finished difference. Result has 235 places, 371 transitions, 6296 flow [2024-06-20 16:46:35,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6037, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6296, PETRI_PLACES=235, PETRI_TRANSITIONS=371} [2024-06-20 16:46:35,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 16:46:35,842 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 371 transitions, 6296 flow [2024-06-20 16:46:35,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:35,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:35,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:35,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:46:35,843 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:35,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1055733122, now seen corresponding path program 5 times [2024-06-20 16:46:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000194105] [2024-06-20 16:46:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:35,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:36,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:36,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000194105] [2024-06-20 16:46:36,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000194105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:36,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:36,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:36,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082378022] [2024-06-20 16:46:36,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:36,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:36,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:36,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 371 transitions, 6296 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:36,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:36,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:36,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:38,588 INFO L124 PetriNetUnfolderBase]: 6484/9957 cut-off events. [2024-06-20 16:46:38,588 INFO L125 PetriNetUnfolderBase]: For 644506/644512 co-relation queries the response was YES. [2024-06-20 16:46:38,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88952 conditions, 9957 events. 6484/9957 cut-off events. For 644506/644512 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 60824 event pairs, 1857 based on Foata normal form. 18/9968 useless extension candidates. Maximal degree in co-relation 88839. Up to 8879 conditions per place. [2024-06-20 16:46:38,719 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 326 selfloop transitions, 87 changer transitions 0/416 dead transitions. [2024-06-20 16:46:38,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 416 transitions, 7598 flow [2024-06-20 16:46:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:46:38,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:46:38,720 INFO L175 Difference]: Start difference. First operand has 235 places, 371 transitions, 6296 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:46:38,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 416 transitions, 7598 flow [2024-06-20 16:46:39,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 416 transitions, 7377 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:46:39,900 INFO L231 Difference]: Finished difference. Result has 238 places, 374 transitions, 6397 flow [2024-06-20 16:46:39,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6397, PETRI_PLACES=238, PETRI_TRANSITIONS=374} [2024-06-20 16:46:39,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-20 16:46:39,901 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 374 transitions, 6397 flow [2024-06-20 16:46:39,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:39,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:39,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:46:39,902 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:39,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash 854636432, now seen corresponding path program 6 times [2024-06-20 16:46:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:39,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675818765] [2024-06-20 16:46:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:40,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:40,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675818765] [2024-06-20 16:46:40,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675818765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:40,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:40,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819807361] [2024-06-20 16:46:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:40,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:40,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:40,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:40,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 374 transitions, 6397 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:40,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:40,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:40,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:42,774 INFO L124 PetriNetUnfolderBase]: 6868/10593 cut-off events. [2024-06-20 16:46:42,774 INFO L125 PetriNetUnfolderBase]: For 766365/766371 co-relation queries the response was YES. [2024-06-20 16:46:42,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93691 conditions, 10593 events. 6868/10593 cut-off events. For 766365/766371 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 65858 event pairs, 1941 based on Foata normal form. 94/10680 useless extension candidates. Maximal degree in co-relation 93576. Up to 9311 conditions per place. [2024-06-20 16:46:42,910 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 316 selfloop transitions, 103 changer transitions 0/422 dead transitions. [2024-06-20 16:46:42,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 422 transitions, 7669 flow [2024-06-20 16:46:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-20 16:46:42,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-20 16:46:42,912 INFO L175 Difference]: Start difference. First operand has 238 places, 374 transitions, 6397 flow. Second operand 10 states and 184 transitions. [2024-06-20 16:46:42,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 422 transitions, 7669 flow [2024-06-20 16:46:44,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 422 transitions, 7522 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:44,213 INFO L231 Difference]: Finished difference. Result has 243 places, 377 transitions, 6615 flow [2024-06-20 16:46:44,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6250, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6615, PETRI_PLACES=243, PETRI_TRANSITIONS=377} [2024-06-20 16:46:44,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-20 16:46:44,214 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 377 transitions, 6615 flow [2024-06-20 16:46:44,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:44,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:44,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:46:44,215 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash -857867584, now seen corresponding path program 7 times [2024-06-20 16:46:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462334744] [2024-06-20 16:46:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:45,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:45,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462334744] [2024-06-20 16:46:45,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462334744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:45,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:45,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:45,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234797049] [2024-06-20 16:46:45,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:45,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:45,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:45,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:45,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 377 transitions, 6615 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:45,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:45,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:45,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:47,519 INFO L124 PetriNetUnfolderBase]: 7083/10958 cut-off events. [2024-06-20 16:46:47,520 INFO L125 PetriNetUnfolderBase]: For 761956/761962 co-relation queries the response was YES. [2024-06-20 16:46:47,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95832 conditions, 10958 events. 7083/10958 cut-off events. For 761956/761962 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 68893 event pairs, 2150 based on Foata normal form. 76/11027 useless extension candidates. Maximal degree in co-relation 95715. Up to 9817 conditions per place. [2024-06-20 16:46:47,651 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 324 selfloop transitions, 97 changer transitions 0/424 dead transitions. [2024-06-20 16:46:47,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 424 transitions, 7829 flow [2024-06-20 16:46:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 16:46:47,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-20 16:46:47,652 INFO L175 Difference]: Start difference. First operand has 243 places, 377 transitions, 6615 flow. Second operand 10 states and 182 transitions. [2024-06-20 16:46:47,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 424 transitions, 7829 flow [2024-06-20 16:46:49,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 424 transitions, 7530 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-20 16:46:49,085 INFO L231 Difference]: Finished difference. Result has 245 places, 379 transitions, 6606 flow [2024-06-20 16:46:49,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6316, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6606, PETRI_PLACES=245, PETRI_TRANSITIONS=379} [2024-06-20 16:46:49,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-20 16:46:49,086 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 379 transitions, 6606 flow [2024-06-20 16:46:49,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:49,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:49,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:49,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:46:49,087 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)] === [2024-06-20 16:46:49,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:49,087 INFO L85 PathProgramCache]: Analyzing trace with hash -858021406, now seen corresponding path program 7 times [2024-06-20 16:46:49,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:49,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079713817] [2024-06-20 16:46:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:49,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:50,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:50,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079713817] [2024-06-20 16:46:50,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079713817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:50,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:50,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:46:50,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008116745] [2024-06-20 16:46:50,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:50,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:46:50,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:46:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:46:50,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:50,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 379 transitions, 6606 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:50,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:50,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:50,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:52,997 INFO L124 PetriNetUnfolderBase]: 7527/11646 cut-off events. [2024-06-20 16:46:52,997 INFO L125 PetriNetUnfolderBase]: For 790627/790633 co-relation queries the response was YES. [2024-06-20 16:46:53,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102457 conditions, 11646 events. 7527/11646 cut-off events. For 790627/790633 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 73849 event pairs, 2197 based on Foata normal form. 20/11659 useless extension candidates. Maximal degree in co-relation 102339. Up to 9525 conditions per place. [2024-06-20 16:46:53,149 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 332 selfloop transitions, 110 changer transitions 0/445 dead transitions. [2024-06-20 16:46:53,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 445 transitions, 8324 flow [2024-06-20 16:46:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:46:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:46:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-20 16:46:53,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-20 16:46:53,151 INFO L175 Difference]: Start difference. First operand has 245 places, 379 transitions, 6606 flow. Second operand 11 states and 207 transitions. [2024-06-20 16:46:53,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 445 transitions, 8324 flow [2024-06-20 16:46:54,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 445 transitions, 8064 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-20 16:46:54,833 INFO L231 Difference]: Finished difference. Result has 248 places, 386 transitions, 6886 flow [2024-06-20 16:46:54,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6886, PETRI_PLACES=248, PETRI_TRANSITIONS=386} [2024-06-20 16:46:54,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-20 16:46:54,834 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 386 transitions, 6886 flow [2024-06-20 16:46:54,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:54,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:54,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:54,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:46:54,835 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)] === [2024-06-20 16:46:54,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2111597616, now seen corresponding path program 8 times [2024-06-20 16:46:54,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:54,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338770328] [2024-06-20 16:46:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:55,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338770328] [2024-06-20 16:46:55,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338770328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:55,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:55,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:55,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764165869] [2024-06-20 16:46:55,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:55,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:55,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:55,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:46:55,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 386 transitions, 6886 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:55,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:55,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:46:55,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:58,062 INFO L124 PetriNetUnfolderBase]: 7646/11847 cut-off events. [2024-06-20 16:46:58,062 INFO L125 PetriNetUnfolderBase]: For 838149/838155 co-relation queries the response was YES. [2024-06-20 16:46:58,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105206 conditions, 11847 events. 7646/11847 cut-off events. For 838149/838155 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 74516 event pairs, 2468 based on Foata normal form. 18/11858 useless extension candidates. Maximal degree in co-relation 105087. Up to 9622 conditions per place. [2024-06-20 16:46:58,221 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 100 changer transitions 0/435 dead transitions. [2024-06-20 16:46:58,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 435 transitions, 8302 flow [2024-06-20 16:46:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:46:58,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-20 16:46:58,223 INFO L175 Difference]: Start difference. First operand has 248 places, 386 transitions, 6886 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:46:58,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 435 transitions, 8302 flow [2024-06-20 16:47:00,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 435 transitions, 8005 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-20 16:47:00,053 INFO L231 Difference]: Finished difference. Result has 250 places, 388 transitions, 6901 flow [2024-06-20 16:47:00,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6589, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6901, PETRI_PLACES=250, PETRI_TRANSITIONS=388} [2024-06-20 16:47:00,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 16:47:00,054 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 388 transitions, 6901 flow [2024-06-20 16:47:00,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:00,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:00,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:00,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:47:00,054 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)] === [2024-06-20 16:47:00,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -852295954, now seen corresponding path program 9 times [2024-06-20 16:47:00,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:00,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382071823] [2024-06-20 16:47:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:00,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:01,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:01,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382071823] [2024-06-20 16:47:01,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382071823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:01,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:01,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971237189] [2024-06-20 16:47:01,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:01,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:01,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:01,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:01,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:01,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:01,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 388 transitions, 6901 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:01,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:01,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:01,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:04,229 INFO L124 PetriNetUnfolderBase]: 8099/12598 cut-off events. [2024-06-20 16:47:04,229 INFO L125 PetriNetUnfolderBase]: For 984033/984039 co-relation queries the response was YES. [2024-06-20 16:47:04,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111074 conditions, 12598 events. 8099/12598 cut-off events. For 984033/984039 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 81487 event pairs, 2354 based on Foata normal form. 74/12665 useless extension candidates. Maximal degree in co-relation 110953. Up to 9559 conditions per place. [2024-06-20 16:47:04,375 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 333 selfloop transitions, 110 changer transitions 0/446 dead transitions. [2024-06-20 16:47:04,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 446 transitions, 8599 flow [2024-06-20 16:47:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:47:04,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:47:04,377 INFO L175 Difference]: Start difference. First operand has 250 places, 388 transitions, 6901 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:47:04,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 446 transitions, 8599 flow [2024-06-20 16:47:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 446 transitions, 8433 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:47:06,443 INFO L231 Difference]: Finished difference. Result has 255 places, 392 transitions, 7185 flow [2024-06-20 16:47:06,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6745, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7185, PETRI_PLACES=255, PETRI_TRANSITIONS=392} [2024-06-20 16:47:06,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-20 16:47:06,444 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 392 transitions, 7185 flow [2024-06-20 16:47:06,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:06,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:06,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:06,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:47:06,445 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)] === [2024-06-20 16:47:06,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:06,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1917463150, now seen corresponding path program 10 times [2024-06-20 16:47:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:06,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117907764] [2024-06-20 16:47:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:07,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117907764] [2024-06-20 16:47:07,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117907764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:07,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:07,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:07,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891279983] [2024-06-20 16:47:07,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:07,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:07,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:07,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:07,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 392 transitions, 7185 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:07,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:07,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:07,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:10,567 INFO L124 PetriNetUnfolderBase]: 8063/12542 cut-off events. [2024-06-20 16:47:10,567 INFO L125 PetriNetUnfolderBase]: For 921303/921309 co-relation queries the response was YES. [2024-06-20 16:47:10,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110649 conditions, 12542 events. 8063/12542 cut-off events. For 921303/921309 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 81547 event pairs, 2764 based on Foata normal form. 22/12557 useless extension candidates. Maximal degree in co-relation 110526. Up to 12052 conditions per place. [2024-06-20 16:47:10,718 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 359 selfloop transitions, 67 changer transitions 0/429 dead transitions. [2024-06-20 16:47:10,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 429 transitions, 8186 flow [2024-06-20 16:47:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:47:10,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:47:10,727 INFO L175 Difference]: Start difference. First operand has 255 places, 392 transitions, 7185 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:47:10,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 429 transitions, 8186 flow [2024-06-20 16:47:12,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 429 transitions, 7881 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-20 16:47:12,924 INFO L231 Difference]: Finished difference. Result has 257 places, 392 transitions, 7024 flow [2024-06-20 16:47:12,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6880, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7024, PETRI_PLACES=257, PETRI_TRANSITIONS=392} [2024-06-20 16:47:12,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-20 16:47:12,926 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 392 transitions, 7024 flow [2024-06-20 16:47:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:12,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:12,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:12,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:47:12,927 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:12,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash -876532604, now seen corresponding path program 1 times [2024-06-20 16:47:12,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:12,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776666075] [2024-06-20 16:47:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:12,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:13,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776666075] [2024-06-20 16:47:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776666075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:13,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942599162] [2024-06-20 16:47:13,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:13,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:13,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:13,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:13,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 392 transitions, 7024 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:13,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:13,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:13,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:16,585 INFO L124 PetriNetUnfolderBase]: 8057/12531 cut-off events. [2024-06-20 16:47:16,588 INFO L125 PetriNetUnfolderBase]: For 906475/906487 co-relation queries the response was YES. [2024-06-20 16:47:16,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109848 conditions, 12531 events. 8057/12531 cut-off events. For 906475/906487 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 81514 event pairs, 2914 based on Foata normal form. 10/12537 useless extension candidates. Maximal degree in co-relation 109724. Up to 12474 conditions per place. [2024-06-20 16:47:16,733 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 384 selfloop transitions, 18 changer transitions 0/405 dead transitions. [2024-06-20 16:47:16,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 405 transitions, 7920 flow [2024-06-20 16:47:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:47:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:47:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-20 16:47:16,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 16:47:16,735 INFO L175 Difference]: Start difference. First operand has 257 places, 392 transitions, 7024 flow. Second operand 6 states and 93 transitions. [2024-06-20 16:47:16,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 405 transitions, 7920 flow [2024-06-20 16:47:18,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 405 transitions, 7778 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:47:18,447 INFO L231 Difference]: Finished difference. Result has 256 places, 395 transitions, 6993 flow [2024-06-20 16:47:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6882, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6993, PETRI_PLACES=256, PETRI_TRANSITIONS=395} [2024-06-20 16:47:18,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 16:47:18,448 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 395 transitions, 6993 flow [2024-06-20 16:47:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:18,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:18,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:18,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:47:18,449 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:18,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1054015478, now seen corresponding path program 1 times [2024-06-20 16:47:18,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766434042] [2024-06-20 16:47:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:19,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766434042] [2024-06-20 16:47:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766434042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:19,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:19,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:19,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723724316] [2024-06-20 16:47:19,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:19,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:19,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:19,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:19,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 395 transitions, 6993 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:19,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:19,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:19,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:22,156 INFO L124 PetriNetUnfolderBase]: 8078/12558 cut-off events. [2024-06-20 16:47:22,156 INFO L125 PetriNetUnfolderBase]: For 906783/906783 co-relation queries the response was YES. [2024-06-20 16:47:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110595 conditions, 12558 events. 8078/12558 cut-off events. For 906783/906783 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 81636 event pairs, 2887 based on Foata normal form. 1/12557 useless extension candidates. Maximal degree in co-relation 110470. Up to 12441 conditions per place. [2024-06-20 16:47:22,303 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 399 selfloop transitions, 37 changer transitions 0/439 dead transitions. [2024-06-20 16:47:22,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 439 transitions, 8723 flow [2024-06-20 16:47:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:47:22,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:47:22,304 INFO L175 Difference]: Start difference. First operand has 256 places, 395 transitions, 6993 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:47:22,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 439 transitions, 8723 flow [2024-06-20 16:47:24,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 439 transitions, 8634 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:24,074 INFO L231 Difference]: Finished difference. Result has 262 places, 417 transitions, 7620 flow [2024-06-20 16:47:24,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6910, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7620, PETRI_PLACES=262, PETRI_TRANSITIONS=417} [2024-06-20 16:47:24,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-20 16:47:24,083 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 417 transitions, 7620 flow [2024-06-20 16:47:24,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:24,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:24,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:47:24,084 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:24,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1053895508, now seen corresponding path program 2 times [2024-06-20 16:47:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:24,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731079357] [2024-06-20 16:47:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:24,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731079357] [2024-06-20 16:47:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731079357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:24,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083903898] [2024-06-20 16:47:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:24,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:24,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:24,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 417 transitions, 7620 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:24,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:24,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:24,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:27,964 INFO L124 PetriNetUnfolderBase]: 8196/12725 cut-off events. [2024-06-20 16:47:27,964 INFO L125 PetriNetUnfolderBase]: For 965956/965968 co-relation queries the response was YES. [2024-06-20 16:47:28,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114286 conditions, 12725 events. 8196/12725 cut-off events. For 965956/965968 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 82704 event pairs, 2854 based on Foata normal form. 14/12735 useless extension candidates. Maximal degree in co-relation 114157. Up to 12545 conditions per place. [2024-06-20 16:47:28,098 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 399 selfloop transitions, 55 changer transitions 0/457 dead transitions. [2024-06-20 16:47:28,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 457 transitions, 9214 flow [2024-06-20 16:47:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:47:28,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-20 16:47:28,100 INFO L175 Difference]: Start difference. First operand has 262 places, 417 transitions, 7620 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:47:28,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 457 transitions, 9214 flow [2024-06-20 16:47:29,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 457 transitions, 8938 flow, removed 137 selfloop flow, removed 1 redundant places. [2024-06-20 16:47:29,912 INFO L231 Difference]: Finished difference. Result has 270 places, 440 transitions, 8051 flow [2024-06-20 16:47:29,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7358, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8051, PETRI_PLACES=270, PETRI_TRANSITIONS=440} [2024-06-20 16:47:29,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-20 16:47:29,913 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 440 transitions, 8051 flow [2024-06-20 16:47:29,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:29,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:29,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:29,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:47:29,913 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:29,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1962719630, now seen corresponding path program 1 times [2024-06-20 16:47:29,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:29,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300820308] [2024-06-20 16:47:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:30,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300820308] [2024-06-20 16:47:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300820308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:30,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:30,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:30,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627654201] [2024-06-20 16:47:30,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:30,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:30,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:30,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 440 transitions, 8051 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:30,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:30,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:30,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:33,689 INFO L124 PetriNetUnfolderBase]: 8148/12659 cut-off events. [2024-06-20 16:47:33,689 INFO L125 PetriNetUnfolderBase]: For 991506/991518 co-relation queries the response was YES. [2024-06-20 16:47:33,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114251 conditions, 12659 events. 8148/12659 cut-off events. For 991506/991518 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 82255 event pairs, 2902 based on Foata normal form. 20/12675 useless extension candidates. Maximal degree in co-relation 114118. Up to 12506 conditions per place. [2024-06-20 16:47:33,827 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 398 selfloop transitions, 55 changer transitions 0/456 dead transitions. [2024-06-20 16:47:33,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 456 transitions, 9007 flow [2024-06-20 16:47:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:47:33,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 16:47:33,829 INFO L175 Difference]: Start difference. First operand has 270 places, 440 transitions, 8051 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:47:33,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 456 transitions, 9007 flow [2024-06-20 16:47:35,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 456 transitions, 8643 flow, removed 177 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:35,671 INFO L231 Difference]: Finished difference. Result has 276 places, 440 transitions, 7816 flow [2024-06-20 16:47:35,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7687, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7816, PETRI_PLACES=276, PETRI_TRANSITIONS=440} [2024-06-20 16:47:35,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-20 16:47:35,672 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 440 transitions, 7816 flow [2024-06-20 16:47:35,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:35,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:35,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:35,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:47:35,673 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:35,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:35,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1096939826, now seen corresponding path program 2 times [2024-06-20 16:47:35,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:35,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246112745] [2024-06-20 16:47:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:35,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246112745] [2024-06-20 16:47:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246112745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387563011] [2024-06-20 16:47:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:36,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:47:36,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 440 transitions, 7816 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:36,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:36,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:47:36,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:39,342 INFO L124 PetriNetUnfolderBase]: 8156/12671 cut-off events. [2024-06-20 16:47:39,343 INFO L125 PetriNetUnfolderBase]: For 1004684/1004696 co-relation queries the response was YES. [2024-06-20 16:47:39,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114182 conditions, 12671 events. 8156/12671 cut-off events. For 1004684/1004696 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 82251 event pairs, 2901 based on Foata normal form. 16/12683 useless extension candidates. Maximal degree in co-relation 114047. Up to 12508 conditions per place. [2024-06-20 16:47:39,479 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 411 selfloop transitions, 48 changer transitions 0/462 dead transitions. [2024-06-20 16:47:39,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 462 transitions, 9005 flow [2024-06-20 16:47:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:47:39,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 16:47:39,481 INFO L175 Difference]: Start difference. First operand has 276 places, 440 transitions, 7816 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:47:39,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 462 transitions, 9005 flow [2024-06-20 16:47:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 462 transitions, 8914 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:41,430 INFO L231 Difference]: Finished difference. Result has 277 places, 446 transitions, 7949 flow [2024-06-20 16:47:41,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7725, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7949, PETRI_PLACES=277, PETRI_TRANSITIONS=446} [2024-06-20 16:47:41,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 16:47:41,431 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 446 transitions, 7949 flow [2024-06-20 16:47:41,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:41,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:41,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:41,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:47:41,431 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:41,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1380579806, now seen corresponding path program 3 times [2024-06-20 16:47:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:41,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463715950] [2024-06-20 16:47:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:41,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat