./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:36:36,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:36:36,465 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:36:36,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:36:36,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:36:36,495 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:36:36,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:36:36,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:36:36,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:36:36,501 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:36:36,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:36:36,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:36:36,503 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:36:36,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:36:36,504 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:36:36,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:36:36,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:36:36,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:36:36,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:36:36,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:36:36,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:36:36,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:36:36,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:36:36,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:36:36,507 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:36:36,508 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:36:36,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:36:36,508 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:36:36,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:36:36,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:36:36,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:36:36,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:36:36,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:36:36,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:36:36,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:36:36,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:36:36,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:36:36,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:36:36,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:36:36,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:36:36,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:36:36,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:36:36,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:36:36,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:36:36,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:36:36,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:36:36,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:36:36,766 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:36:36,767 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:36:36,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-14 13:36:36,957 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:36:36,957 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:36:36,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:36:37,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:36:38,155 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:36:38,156 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:36:38,171 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b81bea67/53879fe120f249138740909ca5a565f9/FLAG45eaa487f [2024-06-14 13:36:38,187 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b81bea67/53879fe120f249138740909ca5a565f9 [2024-06-14 13:36:38,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:36:38,189 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:36:38,189 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:36:38,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:36:38,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:36:38,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:36:36" (1/2) ... [2024-06-14 13:36:38,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3defb878 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:36:38, skipping insertion in model container [2024-06-14 13:36:38,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:36:36" (1/2) ... [2024-06-14 13:36:38,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35f94cd2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:36:38, skipping insertion in model container [2024-06-14 13:36:38,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:36:38" (2/2) ... [2024-06-14 13:36:38,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3defb878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38, skipping insertion in model container [2024-06-14 13:36:38,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:36:38" (2/2) ... [2024-06-14 13:36:38,202 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:36:38,265 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:36:38,266 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! 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 || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-14 13:36:38,266 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! 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$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$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$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_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 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-14 13:36:38,266 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! 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 || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-14 13:36:38,267 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:36:38,267 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-14 13:36:38,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:36:38,524 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:36:38,532 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:36:38,644 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:36:38,684 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:36:38,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38 WrapperNode [2024-06-14 13:36:38,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:36:38,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:36:38,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:36:38,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:36:38,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,753 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 13:36:38,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:36:38,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:36:38,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:36:38,754 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:36:38,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,795 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]. [2024-06-14 13:36:38,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:36:38,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:36:38,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:36:38,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:36:38,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (1/1) ... [2024-06-14 13:36:38,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:36:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:36:38,852 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) [2024-06-14 13:36:38,860 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 [2024-06-14 13:36:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:36:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:36:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:36:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:36:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:36:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:36:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:36:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:36:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:36:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:36:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:36:38,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:36:38,892 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:36:39,030 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:36:39,032 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:36:39,396 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:36:39,397 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:36:39,594 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:36:39,594 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:36:39,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:36:39 BoogieIcfgContainer [2024-06-14 13:36:39,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:36:39,595 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:36:39,595 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:36:39,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:36:39,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:36:36" (1/4) ... [2024-06-14 13:36:39,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe733c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:36:39, skipping insertion in model container [2024-06-14 13:36:39,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:36:38" (2/4) ... [2024-06-14 13:36:39,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe733c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:36:39, skipping insertion in model container [2024-06-14 13:36:39,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:36:38" (3/4) ... [2024-06-14 13:36:39,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe733c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:36:39, skipping insertion in model container [2024-06-14 13:36:39,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:36:39" (4/4) ... [2024-06-14 13:36:39,599 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:36:39,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:36:39,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:36:39,611 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:36:39,646 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:36:39,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:36:39,696 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:36:39,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:36:39,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:36:39,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:36:39,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:36:39,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:36:39,716 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;@337761b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:36:39,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:36:39,721 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:36:39,721 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:36:39,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:36:39,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:39,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:36:39,722 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)] === [2024-06-14 13:36:39,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 828948054, now seen corresponding path program 1 times [2024-06-14 13:36:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:39,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194528424] [2024-06-14 13:36:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194528424] [2024-06-14 13:36:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194528424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:40,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:40,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:36:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106073969] [2024-06-14 13:36:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:40,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:36:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:36:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:36:40,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:36:40,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:40,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:40,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:36:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:41,104 INFO L124 PetriNetUnfolderBase]: 1602/2411 cut-off events. [2024-06-14 13:36:41,104 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-06-14 13:36:41,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4890 conditions, 2411 events. 1602/2411 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11657 event pairs, 1117 based on Foata normal form. 1/2370 useless extension candidates. Maximal degree in co-relation 4875. Up to 2382 conditions per place. [2024-06-14 13:36:41,122 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 13:36:41,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-14 13:36:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:36:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:36:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 13:36:41,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 13:36:41,133 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-14 13:36:41,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-14 13:36:41,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:41,139 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:36:41,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:36:41,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:36:41,143 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:36:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:41,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:41,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:36:41,144 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)] === [2024-06-14 13:36:41,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2050174005, now seen corresponding path program 1 times [2024-06-14 13:36:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317346690] [2024-06-14 13:36:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:41,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:41,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317346690] [2024-06-14 13:36:41,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317346690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:41,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:41,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:36:41,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212253948] [2024-06-14 13:36:41,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:41,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:36:41,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:36:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:36:41,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:36:41,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:41,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:41,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:36:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:42,068 INFO L124 PetriNetUnfolderBase]: 1590/2393 cut-off events. [2024-06-14 13:36:42,068 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-06-14 13:36:42,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5471 conditions, 2393 events. 1590/2393 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11570 event pairs, 869 based on Foata normal form. 6/2396 useless extension candidates. Maximal degree in co-relation 5456. Up to 2334 conditions per place. [2024-06-14 13:36:42,079 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 13:36:42,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 252 flow [2024-06-14 13:36:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:36:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:36:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-14 13:36:42,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-06-14 13:36:42,081 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 93 transitions. [2024-06-14 13:36:42,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 252 flow [2024-06-14 13:36:42,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:36:42,082 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 13:36:42,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 13:36:42,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 13:36:42,083 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 13:36:42,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:42,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:42,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:42,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:36:42,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:42,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1463683409, now seen corresponding path program 1 times [2024-06-14 13:36:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650128716] [2024-06-14 13:36:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:42,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:42,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650128716] [2024-06-14 13:36:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650128716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:42,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:42,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:36:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676175370] [2024-06-14 13:36:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:36:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:36:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:36:42,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:42,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:42,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:43,444 INFO L124 PetriNetUnfolderBase]: 1580/2379 cut-off events. [2024-06-14 13:36:43,444 INFO L125 PetriNetUnfolderBase]: For 1257/1257 co-relation queries the response was YES. [2024-06-14 13:36:43,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 2379 events. 1580/2379 cut-off events. For 1257/1257 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11547 event pairs, 980 based on Foata normal form. 4/2380 useless extension candidates. Maximal degree in co-relation 6029. Up to 2332 conditions per place. [2024-06-14 13:36:43,456 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-06-14 13:36:43,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 282 flow [2024-06-14 13:36:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:36:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:36:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-14 13:36:43,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 13:36:43,461 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 94 transitions. [2024-06-14 13:36:43,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 282 flow [2024-06-14 13:36:43,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 268 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:36:43,464 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 168 flow [2024-06-14 13:36:43,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-14 13:36:43,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-14 13:36:43,465 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 168 flow [2024-06-14 13:36:43,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:43,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:43,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:36:43,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:43,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1706480653, now seen corresponding path program 1 times [2024-06-14 13:36:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:43,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993925000] [2024-06-14 13:36:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:43,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:44,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:44,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993925000] [2024-06-14 13:36:44,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993925000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:44,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:44,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:36:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408018095] [2024-06-14 13:36:44,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:36:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:36:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:36:44,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:36:44,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:44,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:44,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:36:44,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:44,899 INFO L124 PetriNetUnfolderBase]: 1571/2364 cut-off events. [2024-06-14 13:36:44,900 INFO L125 PetriNetUnfolderBase]: For 2316/2316 co-relation queries the response was YES. [2024-06-14 13:36:44,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 2364 events. 1571/2364 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11468 event pairs, 568 based on Foata normal form. 6/2367 useless extension candidates. Maximal degree in co-relation 6540. Up to 2275 conditions per place. [2024-06-14 13:36:44,910 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-14 13:36:44,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 388 flow [2024-06-14 13:36:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:36:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:36:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:36:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 13:36:44,914 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 168 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:36:44,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 388 flow [2024-06-14 13:36:44,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 370 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:44,917 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 209 flow [2024-06-14 13:36:44,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 13:36:44,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 13:36:44,919 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 209 flow [2024-06-14 13:36:44,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:44,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:44,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:44,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:36:44,919 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)] === [2024-06-14 13:36:44,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -795071456, now seen corresponding path program 1 times [2024-06-14 13:36:44,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:44,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769412612] [2024-06-14 13:36:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:44,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:45,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:45,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769412612] [2024-06-14 13:36:45,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769412612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:45,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:45,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:36:45,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915516477] [2024-06-14 13:36:45,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:45,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:36:45,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:36:45,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:36:45,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:45,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:45,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:45,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:45,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:46,155 INFO L124 PetriNetUnfolderBase]: 1593/2407 cut-off events. [2024-06-14 13:36:46,156 INFO L125 PetriNetUnfolderBase]: For 3849/3849 co-relation queries the response was YES. [2024-06-14 13:36:46,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7248 conditions, 2407 events. 1593/2407 cut-off events. For 3849/3849 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11797 event pairs, 672 based on Foata normal form. 4/2406 useless extension candidates. Maximal degree in co-relation 7228. Up to 2287 conditions per place. [2024-06-14 13:36:46,168 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 13:36:46,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 459 flow [2024-06-14 13:36:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:36:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:36:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 13:36:46,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 13:36:46,170 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 209 flow. Second operand 6 states and 118 transitions. [2024-06-14 13:36:46,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 459 flow [2024-06-14 13:36:46,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 430 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:46,173 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 262 flow [2024-06-14 13:36:46,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-14 13:36:46,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-14 13:36:46,174 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 262 flow [2024-06-14 13:36:46,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:46,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:46,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:46,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:36:46,175 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)] === [2024-06-14 13:36:46,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2133112128, now seen corresponding path program 2 times [2024-06-14 13:36:46,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:46,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940492713] [2024-06-14 13:36:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:46,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:46,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:46,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940492713] [2024-06-14 13:36:46,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940492713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:46,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:46,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:36:46,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458555304] [2024-06-14 13:36:46,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:46,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:36:46,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:46,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:36:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:36:46,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:46,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:46,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:46,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:46,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:47,330 INFO L124 PetriNetUnfolderBase]: 1583/2387 cut-off events. [2024-06-14 13:36:47,331 INFO L125 PetriNetUnfolderBase]: For 5567/5567 co-relation queries the response was YES. [2024-06-14 13:36:47,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 2387 events. 1583/2387 cut-off events. For 5567/5567 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11708 event pairs, 671 based on Foata normal form. 4/2385 useless extension candidates. Maximal degree in co-relation 7724. Up to 2279 conditions per place. [2024-06-14 13:36:47,345 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-14 13:36:47,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 434 flow [2024-06-14 13:36:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:36:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:36:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:36:47,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:36:47,346 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 262 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:36:47,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 434 flow [2024-06-14 13:36:47,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 404 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:36:47,352 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 272 flow [2024-06-14 13:36:47,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-14 13:36:47,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 13:36:47,353 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 272 flow [2024-06-14 13:36:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:47,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:47,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:36:47,354 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)] === [2024-06-14 13:36:47,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1674492946, now seen corresponding path program 1 times [2024-06-14 13:36:47,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:47,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243908624] [2024-06-14 13:36:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:48,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243908624] [2024-06-14 13:36:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243908624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:48,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:48,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:36:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593224076] [2024-06-14 13:36:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:48,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:36:48,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:36:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:36:48,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:48,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2024-06-14 13:36:48,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:48,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:48,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:48,854 INFO L124 PetriNetUnfolderBase]: 1573/2378 cut-off events. [2024-06-14 13:36:48,854 INFO L125 PetriNetUnfolderBase]: For 6575/6575 co-relation queries the response was YES. [2024-06-14 13:36:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7827 conditions, 2378 events. 1573/2378 cut-off events. For 6575/6575 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11652 event pairs, 643 based on Foata normal form. 4/2379 useless extension candidates. Maximal degree in co-relation 7803. Up to 2303 conditions per place. [2024-06-14 13:36:48,872 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-14 13:36:48,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 470 flow [2024-06-14 13:36:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:36:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:36:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:36:48,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:36:48,874 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 272 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:36:48,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 470 flow [2024-06-14 13:36:48,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:48,879 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 284 flow [2024-06-14 13:36:48,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-14 13:36:48,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 13:36:48,881 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 284 flow [2024-06-14 13:36:48,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2024-06-14 13:36:48,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:48,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:48,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:36:48,882 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:48,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -247679903, now seen corresponding path program 1 times [2024-06-14 13:36:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:48,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631903852] [2024-06-14 13:36:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631903852] [2024-06-14 13:36:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631903852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:49,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:49,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:36:49,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006132014] [2024-06-14 13:36:49,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:36:49,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:36:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:36:49,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:49,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-14 13:36:49,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:49,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:49,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:49,934 INFO L124 PetriNetUnfolderBase]: 1570/2374 cut-off events. [2024-06-14 13:36:49,934 INFO L125 PetriNetUnfolderBase]: For 7824/7824 co-relation queries the response was YES. [2024-06-14 13:36:49,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8279 conditions, 2374 events. 1570/2374 cut-off events. For 7824/7824 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11584 event pairs, 683 based on Foata normal form. 1/2372 useless extension candidates. Maximal degree in co-relation 8255. Up to 2332 conditions per place. [2024-06-14 13:36:49,945 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 54 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-14 13:36:49,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 446 flow [2024-06-14 13:36:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:36:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:36:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 13:36:49,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 13:36:49,947 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 284 flow. Second operand 5 states and 88 transitions. [2024-06-14 13:36:49,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 446 flow [2024-06-14 13:36:49,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 414 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:49,954 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 298 flow [2024-06-14 13:36:49,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-14 13:36:49,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-14 13:36:49,956 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 298 flow [2024-06-14 13:36:49,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-14 13:36:49,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:49,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:49,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:36:49,957 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)] === [2024-06-14 13:36:49,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash 435779327, now seen corresponding path program 1 times [2024-06-14 13:36:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442939248] [2024-06-14 13:36:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:49,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:50,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442939248] [2024-06-14 13:36:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442939248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:50,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:50,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:50,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425658797] [2024-06-14 13:36:50,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:50,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:50,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:50,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:50,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:50,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:50,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:36:50,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:50,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:50,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:51,297 INFO L124 PetriNetUnfolderBase]: 1592/2416 cut-off events. [2024-06-14 13:36:51,297 INFO L125 PetriNetUnfolderBase]: For 9701/9701 co-relation queries the response was YES. [2024-06-14 13:36:51,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8829 conditions, 2416 events. 1592/2416 cut-off events. For 9701/9701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11836 event pairs, 670 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 8804. Up to 2319 conditions per place. [2024-06-14 13:36:51,308 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-14 13:36:51,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 554 flow [2024-06-14 13:36:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:36:51,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:36:51,310 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 298 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:36:51,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 554 flow [2024-06-14 13:36:51,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 530 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:51,314 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 340 flow [2024-06-14 13:36:51,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 13:36:51,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 13:36:51,314 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 340 flow [2024-06-14 13:36:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:36:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:51,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:36:51,315 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)] === [2024-06-14 13:36:51,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash 750114705, now seen corresponding path program 2 times [2024-06-14 13:36:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:51,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717780143] [2024-06-14 13:36:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:52,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:52,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717780143] [2024-06-14 13:36:52,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717780143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:52,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:52,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459598916] [2024-06-14 13:36:52,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:52,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:52,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:52,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:36:52,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:52,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:52,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:52,625 INFO L124 PetriNetUnfolderBase]: 1614/2459 cut-off events. [2024-06-14 13:36:52,626 INFO L125 PetriNetUnfolderBase]: For 12274/12274 co-relation queries the response was YES. [2024-06-14 13:36:52,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9561 conditions, 2459 events. 1614/2459 cut-off events. For 12274/12274 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12203 event pairs, 620 based on Foata normal form. 4/2458 useless extension candidates. Maximal degree in co-relation 9535. Up to 2240 conditions per place. [2024-06-14 13:36:52,638 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-14 13:36:52,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 684 flow [2024-06-14 13:36:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:36:52,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-14 13:36:52,639 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 340 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:36:52,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 684 flow [2024-06-14 13:36:52,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:52,645 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 424 flow [2024-06-14 13:36:52,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-14 13:36:52,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 13:36:52,645 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 424 flow [2024-06-14 13:36:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:36:52,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:52,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:36:52,646 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)] === [2024-06-14 13:36:52,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:52,646 INFO L85 PathProgramCache]: Analyzing trace with hash 750121649, now seen corresponding path program 1 times [2024-06-14 13:36:52,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:52,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818609676] [2024-06-14 13:36:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:53,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:53,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818609676] [2024-06-14 13:36:53,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818609676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:53,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:53,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:53,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715563934] [2024-06-14 13:36:53,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:53,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:53,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:53,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:53,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:53,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:54,248 INFO L124 PetriNetUnfolderBase]: 1636/2491 cut-off events. [2024-06-14 13:36:54,248 INFO L125 PetriNetUnfolderBase]: For 15660/15660 co-relation queries the response was YES. [2024-06-14 13:36:54,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10247 conditions, 2491 events. 1636/2491 cut-off events. For 15660/15660 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12378 event pairs, 594 based on Foata normal form. 4/2490 useless extension candidates. Maximal degree in co-relation 10220. Up to 2287 conditions per place. [2024-06-14 13:36:54,262 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 76 selfloop transitions, 23 changer transitions 0/104 dead transitions. [2024-06-14 13:36:54,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 784 flow [2024-06-14 13:36:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 13:36:54,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-14 13:36:54,264 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 424 flow. Second operand 7 states and 139 transitions. [2024-06-14 13:36:54,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 784 flow [2024-06-14 13:36:54,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 744 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:54,271 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 496 flow [2024-06-14 13:36:54,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-14 13:36:54,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 13:36:54,272 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 496 flow [2024-06-14 13:36:54,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:54,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:54,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:54,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:36:54,273 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)] === [2024-06-14 13:36:54,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1498379661, now seen corresponding path program 3 times [2024-06-14 13:36:54,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325206003] [2024-06-14 13:36:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:54,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:55,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:55,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325206003] [2024-06-14 13:36:55,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325206003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:55,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:55,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:55,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3471634] [2024-06-14 13:36:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:55,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:55,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 496 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:36:55,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:55,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:55,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:55,648 INFO L124 PetriNetUnfolderBase]: 1626/2466 cut-off events. [2024-06-14 13:36:55,648 INFO L125 PetriNetUnfolderBase]: For 18268/18268 co-relation queries the response was YES. [2024-06-14 13:36:55,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10712 conditions, 2466 events. 1626/2466 cut-off events. For 18268/18268 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12279 event pairs, 573 based on Foata normal form. 4/2461 useless extension candidates. Maximal degree in co-relation 10683. Up to 2264 conditions per place. [2024-06-14 13:36:55,660 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-14 13:36:55,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 732 flow [2024-06-14 13:36:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:36:55,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:36:55,662 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 496 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:36:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 732 flow [2024-06-14 13:36:55,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 682 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:55,673 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 506 flow [2024-06-14 13:36:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-06-14 13:36:55,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 13:36:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 506 flow [2024-06-14 13:36:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:36:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:36:55,675 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)] === [2024-06-14 13:36:55,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1425282093, now seen corresponding path program 2 times [2024-06-14 13:36:55,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603390403] [2024-06-14 13:36:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:56,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:56,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603390403] [2024-06-14 13:36:56,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603390403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:56,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:56,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658148586] [2024-06-14 13:36:56,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:56,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:56,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:56,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:56,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:56,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:56,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:57,238 INFO L124 PetriNetUnfolderBase]: 1648/2513 cut-off events. [2024-06-14 13:36:57,238 INFO L125 PetriNetUnfolderBase]: For 20942/20942 co-relation queries the response was YES. [2024-06-14 13:36:57,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11141 conditions, 2513 events. 1648/2513 cut-off events. For 20942/20942 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12532 event pairs, 583 based on Foata normal form. 4/2511 useless extension candidates. Maximal degree in co-relation 11110. Up to 2292 conditions per place. [2024-06-14 13:36:57,250 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-14 13:36:57,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 842 flow [2024-06-14 13:36:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 13:36:57,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 13:36:57,251 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 506 flow. Second operand 7 states and 135 transitions. [2024-06-14 13:36:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 842 flow [2024-06-14 13:36:57,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 774 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:57,261 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 530 flow [2024-06-14 13:36:57,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-14 13:36:57,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 13:36:57,261 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 530 flow [2024-06-14 13:36:57,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:36:57,262 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)] === [2024-06-14 13:36:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1424985423, now seen corresponding path program 3 times [2024-06-14 13:36:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831393733] [2024-06-14 13:36:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:58,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:58,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831393733] [2024-06-14 13:36:58,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831393733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:58,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:58,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:58,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807756044] [2024-06-14 13:36:58,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:58,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:58,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:58,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:58,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:36:58,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 530 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:58,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:58,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:36:58,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:58,873 INFO L124 PetriNetUnfolderBase]: 1638/2494 cut-off events. [2024-06-14 13:36:58,873 INFO L125 PetriNetUnfolderBase]: For 23204/23204 co-relation queries the response was YES. [2024-06-14 13:36:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11247 conditions, 2494 events. 1638/2494 cut-off events. For 23204/23204 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12441 event pairs, 588 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 11215. Up to 2284 conditions per place. [2024-06-14 13:36:58,885 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 27 changer transitions 0/99 dead transitions. [2024-06-14 13:36:58,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 772 flow [2024-06-14 13:36:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:36:58,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:36:58,887 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 530 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:36:58,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 772 flow [2024-06-14 13:36:58,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 684 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:58,900 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 504 flow [2024-06-14 13:36:58,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-14 13:36:58,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 13:36:58,901 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 504 flow [2024-06-14 13:36:58,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:58,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:58,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:58,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:36:58,901 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)] === [2024-06-14 13:36:58,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1424974511, now seen corresponding path program 1 times [2024-06-14 13:36:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:58,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146159852] [2024-06-14 13:36:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:00,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:00,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146159852] [2024-06-14 13:37:00,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146159852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:00,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:00,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:00,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261714479] [2024-06-14 13:37:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:00,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:00,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:00,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:00,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:00,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:00,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:00,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:00,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:00,975 INFO L124 PetriNetUnfolderBase]: 1630/2492 cut-off events. [2024-06-14 13:37:00,975 INFO L125 PetriNetUnfolderBase]: For 25285/25285 co-relation queries the response was YES. [2024-06-14 13:37:00,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2492 events. 1630/2492 cut-off events. For 25285/25285 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12376 event pairs, 592 based on Foata normal form. 4/2493 useless extension candidates. Maximal degree in co-relation 11267. Up to 2369 conditions per place. [2024-06-14 13:37:00,989 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 83 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-14 13:37:00,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 101 transitions, 780 flow [2024-06-14 13:37:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:37:00,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:37:00,991 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 504 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:37:00,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 101 transitions, 780 flow [2024-06-14 13:37:01,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 716 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:01,003 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 507 flow [2024-06-14 13:37:01,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=507, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-14 13:37:01,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 13:37:01,003 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 507 flow [2024-06-14 13:37:01,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:01,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:01,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:01,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:37:01,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:01,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 911859405, now seen corresponding path program 1 times [2024-06-14 13:37:01,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:01,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17611162] [2024-06-14 13:37:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:01,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:01,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17611162] [2024-06-14 13:37:01,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17611162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:01,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:01,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:01,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483916581] [2024-06-14 13:37:01,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:01,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:01,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:01,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:01,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:01,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:01,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 507 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:01,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:01,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:01,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:02,071 INFO L124 PetriNetUnfolderBase]: 1657/2531 cut-off events. [2024-06-14 13:37:02,071 INFO L125 PetriNetUnfolderBase]: For 28825/28825 co-relation queries the response was YES. [2024-06-14 13:37:02,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11742 conditions, 2531 events. 1657/2531 cut-off events. For 28825/28825 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12548 event pairs, 656 based on Foata normal form. 3/2528 useless extension candidates. Maximal degree in co-relation 11708. Up to 2409 conditions per place. [2024-06-14 13:37:02,081 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 77 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 13:37:02,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 99 transitions, 817 flow [2024-06-14 13:37:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:37:02,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:37:02,083 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 507 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:37:02,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 99 transitions, 817 flow [2024-06-14 13:37:02,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 768 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:02,095 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 575 flow [2024-06-14 13:37:02,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-14 13:37:02,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 13:37:02,096 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 575 flow [2024-06-14 13:37:02,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:02,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:02,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:02,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:37:02,096 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:02,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:02,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1455666914, now seen corresponding path program 1 times [2024-06-14 13:37:02,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:02,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573143513] [2024-06-14 13:37:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:02,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:02,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573143513] [2024-06-14 13:37:02,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573143513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:02,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:02,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:02,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720839709] [2024-06-14 13:37:02,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:02,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:02,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:02,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:02,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 575 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:02,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:02,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:02,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:03,103 INFO L124 PetriNetUnfolderBase]: 1679/2574 cut-off events. [2024-06-14 13:37:03,103 INFO L125 PetriNetUnfolderBase]: For 32966/32966 co-relation queries the response was YES. [2024-06-14 13:37:03,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12602 conditions, 2574 events. 1679/2574 cut-off events. For 32966/32966 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12736 event pairs, 655 based on Foata normal form. 2/2573 useless extension candidates. Maximal degree in co-relation 12566. Up to 2467 conditions per place. [2024-06-14 13:37:03,115 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-14 13:37:03,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 909 flow [2024-06-14 13:37:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:37:03,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:37:03,116 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 575 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:37:03,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 909 flow [2024-06-14 13:37:03,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 114 transitions, 870 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:03,132 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 652 flow [2024-06-14 13:37:03,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=652, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-14 13:37:03,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 13:37:03,132 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 652 flow [2024-06-14 13:37:03,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:03,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:03,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:03,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:37:03,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:03,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1810476032, now seen corresponding path program 2 times [2024-06-14 13:37:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:03,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622396665] [2024-06-14 13:37:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622396665] [2024-06-14 13:37:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622396665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:03,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:03,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048042698] [2024-06-14 13:37:03,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:03,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:03,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:03,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 652 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:03,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:03,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:03,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:04,172 INFO L124 PetriNetUnfolderBase]: 1689/2590 cut-off events. [2024-06-14 13:37:04,172 INFO L125 PetriNetUnfolderBase]: For 36334/36334 co-relation queries the response was YES. [2024-06-14 13:37:04,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 2590 events. 1689/2590 cut-off events. For 36334/36334 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12809 event pairs, 652 based on Foata normal form. 2/2589 useless extension candidates. Maximal degree in co-relation 12943. Up to 2475 conditions per place. [2024-06-14 13:37:04,186 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 91 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-14 13:37:04,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 113 transitions, 952 flow [2024-06-14 13:37:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:37:04,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:37:04,187 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 652 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:37:04,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 113 transitions, 952 flow [2024-06-14 13:37:04,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 914 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:04,202 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 700 flow [2024-06-14 13:37:04,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-14 13:37:04,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-14 13:37:04,203 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 700 flow [2024-06-14 13:37:04,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:04,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:04,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:04,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:37:04,203 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:04,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:04,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1797143552, now seen corresponding path program 3 times [2024-06-14 13:37:04,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:04,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733937974] [2024-06-14 13:37:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:04,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:04,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733937974] [2024-06-14 13:37:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733937974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:04,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:04,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253006878] [2024-06-14 13:37:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:04,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:04,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:04,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:04,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:04,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:04,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:05,256 INFO L124 PetriNetUnfolderBase]: 1673/2567 cut-off events. [2024-06-14 13:37:05,256 INFO L125 PetriNetUnfolderBase]: For 39309/39309 co-relation queries the response was YES. [2024-06-14 13:37:05,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13017 conditions, 2567 events. 1673/2567 cut-off events. For 39309/39309 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12703 event pairs, 656 based on Foata normal form. 4/2562 useless extension candidates. Maximal degree in co-relation 12977. Up to 2419 conditions per place. [2024-06-14 13:37:05,267 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 24 changer transitions 0/109 dead transitions. [2024-06-14 13:37:05,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 109 transitions, 946 flow [2024-06-14 13:37:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:37:05,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:37:05,269 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 700 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:37:05,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 109 transitions, 946 flow [2024-06-14 13:37:05,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 109 transitions, 888 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:05,283 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 698 flow [2024-06-14 13:37:05,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-14 13:37:05,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 13:37:05,284 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 698 flow [2024-06-14 13:37:05,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:05,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:05,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:05,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:37:05,284 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:05,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1803802848, now seen corresponding path program 1 times [2024-06-14 13:37:05,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:05,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549905133] [2024-06-14 13:37:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:05,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:05,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549905133] [2024-06-14 13:37:05,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549905133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:05,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:05,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:05,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371126291] [2024-06-14 13:37:05,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:05,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:05,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:05,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:05,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:05,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:05,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:05,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:05,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:05,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:06,313 INFO L124 PetriNetUnfolderBase]: 1683/2583 cut-off events. [2024-06-14 13:37:06,313 INFO L125 PetriNetUnfolderBase]: For 38420/38420 co-relation queries the response was YES. [2024-06-14 13:37:06,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13064 conditions, 2583 events. 1683/2583 cut-off events. For 38420/38420 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12828 event pairs, 631 based on Foata normal form. 2/2581 useless extension candidates. Maximal degree in co-relation 13023. Up to 2475 conditions per place. [2024-06-14 13:37:06,325 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 98 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-14 13:37:06,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 1005 flow [2024-06-14 13:37:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:37:06,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:37:06,327 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 698 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:37:06,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 1005 flow [2024-06-14 13:37:06,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 937 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:06,348 INFO L231 Difference]: Finished difference. Result has 93 places, 104 transitions, 721 flow [2024-06-14 13:37:06,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=721, PETRI_PLACES=93, PETRI_TRANSITIONS=104} [2024-06-14 13:37:06,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 13:37:06,348 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 104 transitions, 721 flow [2024-06-14 13:37:06,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:06,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:06,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:37:06,349 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:06,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1797136608, now seen corresponding path program 2 times [2024-06-14 13:37:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785778831] [2024-06-14 13:37:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:06,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:06,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785778831] [2024-06-14 13:37:06,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785778831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:06,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:06,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:06,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676528795] [2024-06-14 13:37:06,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:06,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:07,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:07,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 104 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:07,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:07,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:07,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:07,447 INFO L124 PetriNetUnfolderBase]: 1685/2578 cut-off events. [2024-06-14 13:37:07,447 INFO L125 PetriNetUnfolderBase]: For 42558/42561 co-relation queries the response was YES. [2024-06-14 13:37:07,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13608 conditions, 2578 events. 1685/2578 cut-off events. For 42558/42561 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12847 event pairs, 639 based on Foata normal form. 2/2576 useless extension candidates. Maximal degree in co-relation 13565. Up to 2465 conditions per place. [2024-06-14 13:37:07,461 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-14 13:37:07,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 1101 flow [2024-06-14 13:37:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:37:07,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:37:07,462 INFO L175 Difference]: Start difference. First operand has 93 places, 104 transitions, 721 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:37:07,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 1101 flow [2024-06-14 13:37:07,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 122 transitions, 1065 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:07,488 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 811 flow [2024-06-14 13:37:07,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2024-06-14 13:37:07,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 13:37:07,489 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 811 flow [2024-06-14 13:37:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:07,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:07,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:37:07,489 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:07,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1797127680, now seen corresponding path program 1 times [2024-06-14 13:37:07,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:07,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89092705] [2024-06-14 13:37:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:07,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:08,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:08,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89092705] [2024-06-14 13:37:08,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89092705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:08,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:08,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:08,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057991664] [2024-06-14 13:37:08,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:08,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:08,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:08,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 811 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:08,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:08,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:08,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:08,750 INFO L124 PetriNetUnfolderBase]: 1731/2651 cut-off events. [2024-06-14 13:37:08,750 INFO L125 PetriNetUnfolderBase]: For 47858/47861 co-relation queries the response was YES. [2024-06-14 13:37:08,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14367 conditions, 2651 events. 1731/2651 cut-off events. For 47858/47861 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13256 event pairs, 618 based on Foata normal form. 6/2646 useless extension candidates. Maximal degree in co-relation 14322. Up to 2332 conditions per place. [2024-06-14 13:37:08,765 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 42 changer transitions 0/148 dead transitions. [2024-06-14 13:37:08,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1416 flow [2024-06-14 13:37:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:37:08,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:37:08,766 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 811 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:37:08,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1416 flow [2024-06-14 13:37:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 148 transitions, 1372 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:08,792 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1086 flow [2024-06-14 13:37:08,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-14 13:37:08,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 13:37:08,793 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1086 flow [2024-06-14 13:37:08,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:08,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:08,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:08,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:37:08,793 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)] === [2024-06-14 13:37:08,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash 627125578, now seen corresponding path program 1 times [2024-06-14 13:37:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:08,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206076805] [2024-06-14 13:37:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206076805] [2024-06-14 13:37:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206076805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:09,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:09,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034879795] [2024-06-14 13:37:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:09,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:09,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1086 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:09,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:09,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:09,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:10,290 INFO L124 PetriNetUnfolderBase]: 1815/2775 cut-off events. [2024-06-14 13:37:10,291 INFO L125 PetriNetUnfolderBase]: For 56975/56975 co-relation queries the response was YES. [2024-06-14 13:37:10,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16283 conditions, 2775 events. 1815/2775 cut-off events. For 56975/56975 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14001 event pairs, 462 based on Foata normal form. 8/2780 useless extension candidates. Maximal degree in co-relation 16234. Up to 2502 conditions per place. [2024-06-14 13:37:10,306 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-14 13:37:10,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 171 transitions, 1682 flow [2024-06-14 13:37:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:37:10,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:37:10,308 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1086 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:37:10,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 171 transitions, 1682 flow [2024-06-14 13:37:10,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 171 transitions, 1603 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:10,345 INFO L231 Difference]: Finished difference. Result has 111 places, 132 transitions, 1140 flow [2024-06-14 13:37:10,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1140, PETRI_PLACES=111, PETRI_TRANSITIONS=132} [2024-06-14 13:37:10,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 13:37:10,346 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 132 transitions, 1140 flow [2024-06-14 13:37:10,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:10,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:10,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:10,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:37:10,347 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:10,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash -977967598, now seen corresponding path program 2 times [2024-06-14 13:37:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:10,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403529556] [2024-06-14 13:37:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:10,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:11,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:11,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403529556] [2024-06-14 13:37:11,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403529556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:11,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:11,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330437437] [2024-06-14 13:37:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:11,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:11,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 1140 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:11,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:11,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:11,896 INFO L124 PetriNetUnfolderBase]: 1799/2751 cut-off events. [2024-06-14 13:37:11,896 INFO L125 PetriNetUnfolderBase]: For 59199/59199 co-relation queries the response was YES. [2024-06-14 13:37:11,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16280 conditions, 2751 events. 1799/2751 cut-off events. For 59199/59199 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13789 event pairs, 599 based on Foata normal form. 8/2756 useless extension candidates. Maximal degree in co-relation 16229. Up to 2570 conditions per place. [2024-06-14 13:37:11,913 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 19 changer transitions 0/163 dead transitions. [2024-06-14 13:37:11,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 163 transitions, 1552 flow [2024-06-14 13:37:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:37:11,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:37:11,915 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 1140 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:37:11,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 163 transitions, 1552 flow [2024-06-14 13:37:11,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 163 transitions, 1464 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:11,958 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1097 flow [2024-06-14 13:37:11,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1097, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-14 13:37:11,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 13:37:11,959 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1097 flow [2024-06-14 13:37:11,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:11,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:11,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:11,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:37:11,959 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)] === [2024-06-14 13:37:11,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2122823362, now seen corresponding path program 1 times [2024-06-14 13:37:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:11,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014182479] [2024-06-14 13:37:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:11,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:13,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014182479] [2024-06-14 13:37:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014182479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:13,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:13,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169194860] [2024-06-14 13:37:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:13,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:13,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:13,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:13,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:13,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:13,977 INFO L124 PetriNetUnfolderBase]: 1821/2783 cut-off events. [2024-06-14 13:37:13,977 INFO L125 PetriNetUnfolderBase]: For 62883/62883 co-relation queries the response was YES. [2024-06-14 13:37:13,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16447 conditions, 2783 events. 1821/2783 cut-off events. For 62883/62883 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13975 event pairs, 602 based on Foata normal form. 4/2784 useless extension candidates. Maximal degree in co-relation 16394. Up to 2630 conditions per place. [2024-06-14 13:37:13,994 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 140 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2024-06-14 13:37:13,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 165 transitions, 1549 flow [2024-06-14 13:37:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:37:13,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:37:13,995 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1097 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:37:13,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 165 transitions, 1549 flow [2024-06-14 13:37:14,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 165 transitions, 1506 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:14,033 INFO L231 Difference]: Finished difference. Result has 115 places, 135 transitions, 1148 flow [2024-06-14 13:37:14,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1148, PETRI_PLACES=115, PETRI_TRANSITIONS=135} [2024-06-14 13:37:14,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 13:37:14,034 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 135 transitions, 1148 flow [2024-06-14 13:37:14,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:14,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:14,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:14,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:37:14,034 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)] === [2024-06-14 13:37:14,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:14,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1618192752, now seen corresponding path program 3 times [2024-06-14 13:37:14,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:14,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509366668] [2024-06-14 13:37:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:14,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509366668] [2024-06-14 13:37:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509366668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:14,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:14,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955285677] [2024-06-14 13:37:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:14,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 135 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:14,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:14,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:15,568 INFO L124 PetriNetUnfolderBase]: 1855/2843 cut-off events. [2024-06-14 13:37:15,568 INFO L125 PetriNetUnfolderBase]: For 69333/69336 co-relation queries the response was YES. [2024-06-14 13:37:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17254 conditions, 2843 events. 1855/2843 cut-off events. For 69333/69336 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14324 event pairs, 538 based on Foata normal form. 8/2847 useless extension candidates. Maximal degree in co-relation 17200. Up to 2546 conditions per place. [2024-06-14 13:37:15,584 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 131 selfloop transitions, 32 changer transitions 0/168 dead transitions. [2024-06-14 13:37:15,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 168 transitions, 1616 flow [2024-06-14 13:37:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:37:15,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:37:15,586 INFO L175 Difference]: Start difference. First operand has 115 places, 135 transitions, 1148 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:37:15,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 168 transitions, 1616 flow [2024-06-14 13:37:15,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 168 transitions, 1546 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:15,623 INFO L231 Difference]: Finished difference. Result has 117 places, 137 transitions, 1197 flow [2024-06-14 13:37:15,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1197, PETRI_PLACES=117, PETRI_TRANSITIONS=137} [2024-06-14 13:37:15,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 13:37:15,623 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 137 transitions, 1197 flow [2024-06-14 13:37:15,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:15,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:15,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:15,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:37:15,624 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)] === [2024-06-14 13:37:15,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1611758702, now seen corresponding path program 2 times [2024-06-14 13:37:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:15,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758566150] [2024-06-14 13:37:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:15,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:16,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758566150] [2024-06-14 13:37:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758566150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701526822] [2024-06-14 13:37:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:16,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:16,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 137 transitions, 1197 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:16,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:16,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:17,586 INFO L124 PetriNetUnfolderBase]: 1909/2931 cut-off events. [2024-06-14 13:37:17,586 INFO L125 PetriNetUnfolderBase]: For 76737/76740 co-relation queries the response was YES. [2024-06-14 13:37:17,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 2931 events. 1909/2931 cut-off events. For 76737/76740 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14947 event pairs, 496 based on Foata normal form. 4/2931 useless extension candidates. Maximal degree in co-relation 18082. Up to 2484 conditions per place. [2024-06-14 13:37:17,603 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 132 selfloop transitions, 47 changer transitions 0/184 dead transitions. [2024-06-14 13:37:17,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 184 transitions, 1981 flow [2024-06-14 13:37:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 13:37:17,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 13:37:17,604 INFO L175 Difference]: Start difference. First operand has 117 places, 137 transitions, 1197 flow. Second operand 8 states and 164 transitions. [2024-06-14 13:37:17,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 184 transitions, 1981 flow [2024-06-14 13:37:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 1880 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:17,647 INFO L231 Difference]: Finished difference. Result has 119 places, 146 transitions, 1348 flow [2024-06-14 13:37:17,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1348, PETRI_PLACES=119, PETRI_TRANSITIONS=146} [2024-06-14 13:37:17,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 13:37:17,647 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 146 transitions, 1348 flow [2024-06-14 13:37:17,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:17,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:17,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:17,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:37:17,648 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)] === [2024-06-14 13:37:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1835226818, now seen corresponding path program 3 times [2024-06-14 13:37:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809407801] [2024-06-14 13:37:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:18,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:18,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809407801] [2024-06-14 13:37:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809407801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:18,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342518818] [2024-06-14 13:37:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:18,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:18,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:18,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:18,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:18,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:19,696 INFO L124 PetriNetUnfolderBase]: 1899/2917 cut-off events. [2024-06-14 13:37:19,696 INFO L125 PetriNetUnfolderBase]: For 81379/81382 co-relation queries the response was YES. [2024-06-14 13:37:19,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18385 conditions, 2917 events. 1899/2917 cut-off events. For 81379/81382 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14844 event pairs, 501 based on Foata normal form. 4/2917 useless extension candidates. Maximal degree in co-relation 18329. Up to 2476 conditions per place. [2024-06-14 13:37:19,715 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 48 changer transitions 0/180 dead transitions. [2024-06-14 13:37:19,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 180 transitions, 1888 flow [2024-06-14 13:37:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 13:37:19,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 13:37:19,716 INFO L175 Difference]: Start difference. First operand has 119 places, 146 transitions, 1348 flow. Second operand 8 states and 159 transitions. [2024-06-14 13:37:19,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 180 transitions, 1888 flow [2024-06-14 13:37:19,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1783 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-14 13:37:19,772 INFO L231 Difference]: Finished difference. Result has 124 places, 146 transitions, 1347 flow [2024-06-14 13:37:19,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1347, PETRI_PLACES=124, PETRI_TRANSITIONS=146} [2024-06-14 13:37:19,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 13:37:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 146 transitions, 1347 flow [2024-06-14 13:37:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:19,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:19,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:37:19,774 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)] === [2024-06-14 13:37:19,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash -687560656, now seen corresponding path program 1 times [2024-06-14 13:37:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:19,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900283786] [2024-06-14 13:37:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:21,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900283786] [2024-06-14 13:37:21,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900283786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:21,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020136473] [2024-06-14 13:37:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:21,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:21,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 146 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:21,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:21,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:21,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:21,954 INFO L124 PetriNetUnfolderBase]: 1916/2949 cut-off events. [2024-06-14 13:37:21,954 INFO L125 PetriNetUnfolderBase]: For 86553/86556 co-relation queries the response was YES. [2024-06-14 13:37:21,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18787 conditions, 2949 events. 1916/2949 cut-off events. For 86553/86556 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15052 event pairs, 527 based on Foata normal form. 4/2949 useless extension candidates. Maximal degree in co-relation 18729. Up to 2673 conditions per place. [2024-06-14 13:37:21,973 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 141 selfloop transitions, 33 changer transitions 0/179 dead transitions. [2024-06-14 13:37:21,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 179 transitions, 1825 flow [2024-06-14 13:37:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:37:21,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:37:21,974 INFO L175 Difference]: Start difference. First operand has 124 places, 146 transitions, 1347 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:37:21,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 179 transitions, 1825 flow [2024-06-14 13:37:22,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 179 transitions, 1742 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:22,030 INFO L231 Difference]: Finished difference. Result has 126 places, 148 transitions, 1379 flow [2024-06-14 13:37:22,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1379, PETRI_PLACES=126, PETRI_TRANSITIONS=148} [2024-06-14 13:37:22,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 13:37:22,030 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 148 transitions, 1379 flow [2024-06-14 13:37:22,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:22,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:22,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:22,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:37:22,031 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)] === [2024-06-14 13:37:22,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1128776622, now seen corresponding path program 4 times [2024-06-14 13:37:22,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:22,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974670307] [2024-06-14 13:37:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:22,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:22,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974670307] [2024-06-14 13:37:22,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974670307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:22,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:22,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019335942] [2024-06-14 13:37:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:22,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:22,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 148 transitions, 1379 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:22,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:22,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:22,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:23,508 INFO L124 PetriNetUnfolderBase]: 1900/2916 cut-off events. [2024-06-14 13:37:23,508 INFO L125 PetriNetUnfolderBase]: For 91110/91110 co-relation queries the response was YES. [2024-06-14 13:37:23,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18726 conditions, 2916 events. 1900/2916 cut-off events. For 91110/91110 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14818 event pairs, 541 based on Foata normal form. 8/2912 useless extension candidates. Maximal degree in co-relation 18667. Up to 2613 conditions per place. [2024-06-14 13:37:23,529 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 141 selfloop transitions, 32 changer transitions 0/178 dead transitions. [2024-06-14 13:37:23,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 178 transitions, 1865 flow [2024-06-14 13:37:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:37:23,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:37:23,531 INFO L175 Difference]: Start difference. First operand has 126 places, 148 transitions, 1379 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:37:23,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 178 transitions, 1865 flow [2024-06-14 13:37:23,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 1768 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:23,577 INFO L231 Difference]: Finished difference. Result has 128 places, 150 transitions, 1409 flow [2024-06-14 13:37:23,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1409, PETRI_PLACES=128, PETRI_TRANSITIONS=150} [2024-06-14 13:37:23,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 13:37:23,578 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 150 transitions, 1409 flow [2024-06-14 13:37:23,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:23,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:23,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:37:23,578 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)] === [2024-06-14 13:37:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1036689138, now seen corresponding path program 4 times [2024-06-14 13:37:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286096738] [2024-06-14 13:37:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:24,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286096738] [2024-06-14 13:37:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286096738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:24,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:24,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500809015] [2024-06-14 13:37:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:24,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:24,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:24,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:24,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 150 transitions, 1409 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:24,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:24,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:24,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:25,509 INFO L124 PetriNetUnfolderBase]: 1922/2958 cut-off events. [2024-06-14 13:37:25,510 INFO L125 PetriNetUnfolderBase]: For 97197/97197 co-relation queries the response was YES. [2024-06-14 13:37:25,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19161 conditions, 2958 events. 1922/2958 cut-off events. For 97197/97197 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15159 event pairs, 489 based on Foata normal form. 4/2950 useless extension candidates. Maximal degree in co-relation 19101. Up to 2498 conditions per place. [2024-06-14 13:37:25,527 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 51 changer transitions 0/185 dead transitions. [2024-06-14 13:37:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 185 transitions, 2022 flow [2024-06-14 13:37:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:37:25,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:37:25,528 INFO L175 Difference]: Start difference. First operand has 128 places, 150 transitions, 1409 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:37:25,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 185 transitions, 2022 flow [2024-06-14 13:37:25,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 185 transitions, 1913 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:25,581 INFO L231 Difference]: Finished difference. Result has 130 places, 153 transitions, 1467 flow [2024-06-14 13:37:25,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1467, PETRI_PLACES=130, PETRI_TRANSITIONS=153} [2024-06-14 13:37:25,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:37:25,582 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 153 transitions, 1467 flow [2024-06-14 13:37:25,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:25,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:25,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:37:25,582 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)] === [2024-06-14 13:37:25,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1030439538, now seen corresponding path program 5 times [2024-06-14 13:37:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922493637] [2024-06-14 13:37:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:25,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922493637] [2024-06-14 13:37:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922493637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:26,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332498583] [2024-06-14 13:37:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:26,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:26,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 153 transitions, 1467 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:26,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:26,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:27,474 INFO L124 PetriNetUnfolderBase]: 1944/2995 cut-off events. [2024-06-14 13:37:27,475 INFO L125 PetriNetUnfolderBase]: For 102729/102729 co-relation queries the response was YES. [2024-06-14 13:37:27,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19536 conditions, 2995 events. 1944/2995 cut-off events. For 102729/102729 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15423 event pairs, 494 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 19475. Up to 2517 conditions per place. [2024-06-14 13:37:27,497 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 53 changer transitions 0/187 dead transitions. [2024-06-14 13:37:27,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 187 transitions, 2090 flow [2024-06-14 13:37:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:37:27,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:37:27,499 INFO L175 Difference]: Start difference. First operand has 130 places, 153 transitions, 1467 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:37:27,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 187 transitions, 2090 flow [2024-06-14 13:37:27,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 1882 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:27,560 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1436 flow [2024-06-14 13:37:27,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1436, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-14 13:37:27,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 13:37:27,561 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1436 flow [2024-06-14 13:37:27,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:27,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:27,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:27,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:37:27,562 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)] === [2024-06-14 13:37:27,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash 683607376, now seen corresponding path program 6 times [2024-06-14 13:37:27,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:27,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275054831] [2024-06-14 13:37:27,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:27,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:28,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:28,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275054831] [2024-06-14 13:37:28,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275054831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:28,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:28,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:28,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305099794] [2024-06-14 13:37:28,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:28,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:28,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1436 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:28,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:28,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:28,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:29,467 INFO L124 PetriNetUnfolderBase]: 1934/2981 cut-off events. [2024-06-14 13:37:29,467 INFO L125 PetriNetUnfolderBase]: For 105085/105085 co-relation queries the response was YES. [2024-06-14 13:37:29,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19342 conditions, 2981 events. 1934/2981 cut-off events. For 105085/105085 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15318 event pairs, 499 based on Foata normal form. 4/2973 useless extension candidates. Maximal degree in co-relation 19280. Up to 2509 conditions per place. [2024-06-14 13:37:29,488 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 123 selfloop transitions, 55 changer transitions 0/183 dead transitions. [2024-06-14 13:37:29,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1872 flow [2024-06-14 13:37:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:37:29,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:37:29,490 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1436 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:37:29,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1872 flow [2024-06-14 13:37:29,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 183 transitions, 1723 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:29,556 INFO L231 Difference]: Finished difference. Result has 134 places, 156 transitions, 1405 flow [2024-06-14 13:37:29,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1405, PETRI_PLACES=134, PETRI_TRANSITIONS=156} [2024-06-14 13:37:29,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 13:37:29,557 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 156 transitions, 1405 flow [2024-06-14 13:37:29,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:29,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:29,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:29,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:37:29,557 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)] === [2024-06-14 13:37:29,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash 493849730, now seen corresponding path program 2 times [2024-06-14 13:37:29,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:29,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435155532] [2024-06-14 13:37:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435155532] [2024-06-14 13:37:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435155532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236401524] [2024-06-14 13:37:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:30,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:30,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 156 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:30,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:30,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:30,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:31,672 INFO L124 PetriNetUnfolderBase]: 1951/3018 cut-off events. [2024-06-14 13:37:31,672 INFO L125 PetriNetUnfolderBase]: For 110778/110778 co-relation queries the response was YES. [2024-06-14 13:37:31,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19605 conditions, 3018 events. 1951/3018 cut-off events. For 110778/110778 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15509 event pairs, 512 based on Foata normal form. 4/3013 useless extension candidates. Maximal degree in co-relation 19542. Up to 2726 conditions per place. [2024-06-14 13:37:31,693 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 33 changer transitions 0/187 dead transitions. [2024-06-14 13:37:31,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 1899 flow [2024-06-14 13:37:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:37:31,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:37:31,694 INFO L175 Difference]: Start difference. First operand has 134 places, 156 transitions, 1405 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:37:31,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 1899 flow [2024-06-14 13:37:31,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 187 transitions, 1764 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:37:31,761 INFO L231 Difference]: Finished difference. Result has 134 places, 158 transitions, 1391 flow [2024-06-14 13:37:31,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=134, PETRI_TRANSITIONS=158} [2024-06-14 13:37:31,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 13:37:31,762 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 158 transitions, 1391 flow [2024-06-14 13:37:31,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:31,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:31,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:31,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:37:31,762 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)] === [2024-06-14 13:37:31,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash 693735634, now seen corresponding path program 3 times [2024-06-14 13:37:31,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:31,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481527839] [2024-06-14 13:37:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:31,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:33,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:33,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481527839] [2024-06-14 13:37:33,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481527839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:33,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:33,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360378678] [2024-06-14 13:37:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:33,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:33,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:33,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:33,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 158 transitions, 1391 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:33,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:33,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:33,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:33,898 INFO L124 PetriNetUnfolderBase]: 1968/3055 cut-off events. [2024-06-14 13:37:33,898 INFO L125 PetriNetUnfolderBase]: For 117845/117845 co-relation queries the response was YES. [2024-06-14 13:37:33,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19968 conditions, 3055 events. 1968/3055 cut-off events. For 117845/117845 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15861 event pairs, 517 based on Foata normal form. 4/3050 useless extension candidates. Maximal degree in co-relation 19904. Up to 2753 conditions per place. [2024-06-14 13:37:33,920 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 33 changer transitions 0/187 dead transitions. [2024-06-14 13:37:33,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 1883 flow [2024-06-14 13:37:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:37:33,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:37:33,921 INFO L175 Difference]: Start difference. First operand has 134 places, 158 transitions, 1391 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:37:33,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 1883 flow [2024-06-14 13:37:33,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 187 transitions, 1780 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:33,996 INFO L231 Difference]: Finished difference. Result has 136 places, 160 transitions, 1413 flow [2024-06-14 13:37:33,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1413, PETRI_PLACES=136, PETRI_TRANSITIONS=160} [2024-06-14 13:37:33,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 13:37:33,997 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 160 transitions, 1413 flow [2024-06-14 13:37:33,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:33,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:33,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:33,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:37:33,997 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)] === [2024-06-14 13:37:33,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash 694091824, now seen corresponding path program 4 times [2024-06-14 13:37:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:33,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493476308] [2024-06-14 13:37:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:35,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:35,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493476308] [2024-06-14 13:37:35,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493476308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:35,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:35,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275245420] [2024-06-14 13:37:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:35,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:35,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:35,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 160 transitions, 1413 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:35,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:35,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:35,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:36,081 INFO L124 PetriNetUnfolderBase]: 1960/3043 cut-off events. [2024-06-14 13:37:36,081 INFO L125 PetriNetUnfolderBase]: For 122608/122608 co-relation queries the response was YES. [2024-06-14 13:37:36,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20010 conditions, 3043 events. 1960/3043 cut-off events. For 122608/122608 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15818 event pairs, 485 based on Foata normal form. 4/3038 useless extension candidates. Maximal degree in co-relation 19945. Up to 2664 conditions per place. [2024-06-14 13:37:36,103 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 40 changer transitions 0/189 dead transitions. [2024-06-14 13:37:36,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 1913 flow [2024-06-14 13:37:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:37:36,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:37:36,105 INFO L175 Difference]: Start difference. First operand has 136 places, 160 transitions, 1413 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:37:36,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 1913 flow [2024-06-14 13:37:36,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 1806 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:36,196 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1449 flow [2024-06-14 13:37:36,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-14 13:37:36,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 13:37:36,197 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1449 flow [2024-06-14 13:37:36,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:36,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:36,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:37:36,198 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:36,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash -927914219, now seen corresponding path program 1 times [2024-06-14 13:37:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528199812] [2024-06-14 13:37:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:36,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:36,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528199812] [2024-06-14 13:37:36,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528199812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:36,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:36,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:36,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191738925] [2024-06-14 13:37:36,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:36,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:36,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:36,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:37,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:37,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:37,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:37,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:37,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:37,634 INFO L124 PetriNetUnfolderBase]: 1957/3037 cut-off events. [2024-06-14 13:37:37,634 INFO L125 PetriNetUnfolderBase]: For 127010/127010 co-relation queries the response was YES. [2024-06-14 13:37:37,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20201 conditions, 3037 events. 1957/3037 cut-off events. For 127010/127010 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15736 event pairs, 606 based on Foata normal form. 1/3035 useless extension candidates. Maximal degree in co-relation 20135. Up to 2889 conditions per place. [2024-06-14 13:37:37,656 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 154 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2024-06-14 13:37:37,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 1829 flow [2024-06-14 13:37:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:37:37,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:37:37,657 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1449 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:37:37,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 1829 flow [2024-06-14 13:37:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 175 transitions, 1690 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:37,737 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1352 flow [2024-06-14 13:37:37,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-14 13:37:37,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 13:37:37,738 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1352 flow [2024-06-14 13:37:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:37,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:37,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:37:37,738 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:37,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2107001350, now seen corresponding path program 1 times [2024-06-14 13:37:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220760183] [2024-06-14 13:37:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:38,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:38,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220760183] [2024-06-14 13:37:38,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220760183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:38,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:38,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:38,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861834812] [2024-06-14 13:37:38,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:38,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:38,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:38,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:38,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1352 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:38,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:38,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:38,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:38,972 INFO L124 PetriNetUnfolderBase]: 2013/3124 cut-off events. [2024-06-14 13:37:38,972 INFO L125 PetriNetUnfolderBase]: For 136341/136341 co-relation queries the response was YES. [2024-06-14 13:37:38,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20631 conditions, 3124 events. 2013/3124 cut-off events. For 136341/136341 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16312 event pairs, 577 based on Foata normal form. 4/3116 useless extension candidates. Maximal degree in co-relation 20564. Up to 2859 conditions per place. [2024-06-14 13:37:38,995 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-14 13:37:38,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 1969 flow [2024-06-14 13:37:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:37:38,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:37:38,997 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1352 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:37:38,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 1969 flow [2024-06-14 13:37:39,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 191 transitions, 1927 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:39,088 INFO L231 Difference]: Finished difference. Result has 142 places, 175 transitions, 1551 flow [2024-06-14 13:37:39,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1551, PETRI_PLACES=142, PETRI_TRANSITIONS=175} [2024-06-14 13:37:39,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 13:37:39,089 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 175 transitions, 1551 flow [2024-06-14 13:37:39,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:39,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:37:39,089 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:39,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash 123341806, now seen corresponding path program 2 times [2024-06-14 13:37:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:39,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179100000] [2024-06-14 13:37:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:39,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179100000] [2024-06-14 13:37:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179100000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:39,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:39,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941056593] [2024-06-14 13:37:39,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:39,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:39,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:39,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 175 transitions, 1551 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:39,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:39,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:39,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:40,399 INFO L124 PetriNetUnfolderBase]: 2085/3228 cut-off events. [2024-06-14 13:37:40,400 INFO L125 PetriNetUnfolderBase]: For 148425/148428 co-relation queries the response was YES. [2024-06-14 13:37:40,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 3228 events. 2085/3228 cut-off events. For 148425/148428 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16827 event pairs, 600 based on Foata normal form. 4/3221 useless extension candidates. Maximal degree in co-relation 22001. Up to 2715 conditions per place. [2024-06-14 13:37:40,422 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 59 changer transitions 0/214 dead transitions. [2024-06-14 13:37:40,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 214 transitions, 2463 flow [2024-06-14 13:37:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:37:40,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:37:40,427 INFO L175 Difference]: Start difference. First operand has 142 places, 175 transitions, 1551 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:37:40,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 214 transitions, 2463 flow [2024-06-14 13:37:40,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 214 transitions, 2404 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:40,521 INFO L231 Difference]: Finished difference. Result has 149 places, 197 transitions, 1957 flow [2024-06-14 13:37:40,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=149, PETRI_TRANSITIONS=197} [2024-06-14 13:37:40,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-14 13:37:40,521 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 197 transitions, 1957 flow [2024-06-14 13:37:40,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:40,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:40,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:37:40,522 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:40,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 123608716, now seen corresponding path program 3 times [2024-06-14 13:37:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:40,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776597662] [2024-06-14 13:37:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:40,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:41,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:41,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776597662] [2024-06-14 13:37:41,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776597662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:41,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:41,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656596770] [2024-06-14 13:37:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:41,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:41,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 197 transitions, 1957 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:41,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:41,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:41,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:41,853 INFO L124 PetriNetUnfolderBase]: 2075/3210 cut-off events. [2024-06-14 13:37:41,853 INFO L125 PetriNetUnfolderBase]: For 156851/156854 co-relation queries the response was YES. [2024-06-14 13:37:41,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22497 conditions, 3210 events. 2075/3210 cut-off events. For 156851/156854 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16693 event pairs, 595 based on Foata normal form. 8/3207 useless extension candidates. Maximal degree in co-relation 22423. Up to 2717 conditions per place. [2024-06-14 13:37:41,881 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-14 13:37:41,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 217 transitions, 2672 flow [2024-06-14 13:37:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:37:41,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:37:41,882 INFO L175 Difference]: Start difference. First operand has 149 places, 197 transitions, 1957 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:37:41,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 217 transitions, 2672 flow [2024-06-14 13:37:41,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 217 transitions, 2577 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:41,993 INFO L231 Difference]: Finished difference. Result has 154 places, 202 transitions, 2109 flow [2024-06-14 13:37:41,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2109, PETRI_PLACES=154, PETRI_TRANSITIONS=202} [2024-06-14 13:37:41,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 13:37:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 202 transitions, 2109 flow [2024-06-14 13:37:41,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:41,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:41,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:41,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:37:41,994 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:41,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash 123618636, now seen corresponding path program 1 times [2024-06-14 13:37:41,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:41,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72419013] [2024-06-14 13:37:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:41,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:42,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:42,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72419013] [2024-06-14 13:37:42,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72419013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:42,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:42,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870420403] [2024-06-14 13:37:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:42,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:42,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 202 transitions, 2109 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:42,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:42,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:42,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:43,683 INFO L124 PetriNetUnfolderBase]: 2133/3307 cut-off events. [2024-06-14 13:37:43,683 INFO L125 PetriNetUnfolderBase]: For 167481/167481 co-relation queries the response was YES. [2024-06-14 13:37:43,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23347 conditions, 3307 events. 2133/3307 cut-off events. For 167481/167481 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17174 event pairs, 599 based on Foata normal form. 16/3311 useless extension candidates. Maximal degree in co-relation 23271. Up to 2995 conditions per place. [2024-06-14 13:37:43,708 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 179 selfloop transitions, 52 changer transitions 0/236 dead transitions. [2024-06-14 13:37:43,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 236 transitions, 2932 flow [2024-06-14 13:37:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:37:43,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:37:43,709 INFO L175 Difference]: Start difference. First operand has 154 places, 202 transitions, 2109 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:37:43,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 236 transitions, 2932 flow [2024-06-14 13:37:43,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 236 transitions, 2800 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 13:37:43,813 INFO L231 Difference]: Finished difference. Result has 162 places, 218 transitions, 2384 flow [2024-06-14 13:37:43,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=162, PETRI_TRANSITIONS=218} [2024-06-14 13:37:43,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 13:37:43,814 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 218 transitions, 2384 flow [2024-06-14 13:37:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:43,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:43,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:37:43,814 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1346319005, now seen corresponding path program 1 times [2024-06-14 13:37:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423147911] [2024-06-14 13:37:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423147911] [2024-06-14 13:37:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423147911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:44,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:44,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:44,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780278052] [2024-06-14 13:37:44,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:44,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:44,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 218 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:44,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:44,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:44,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:45,332 INFO L124 PetriNetUnfolderBase]: 2150/3337 cut-off events. [2024-06-14 13:37:45,332 INFO L125 PetriNetUnfolderBase]: For 179350/179350 co-relation queries the response was YES. [2024-06-14 13:37:45,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24609 conditions, 3337 events. 2150/3337 cut-off events. For 179350/179350 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17382 event pairs, 584 based on Foata normal form. 1/3335 useless extension candidates. Maximal degree in co-relation 24529. Up to 3150 conditions per place. [2024-06-14 13:37:45,358 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 223 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-14 13:37:45,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 250 transitions, 3034 flow [2024-06-14 13:37:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:37:45,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:37:45,359 INFO L175 Difference]: Start difference. First operand has 162 places, 218 transitions, 2384 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:37:45,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 250 transitions, 3034 flow [2024-06-14 13:37:45,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 250 transitions, 2919 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:45,498 INFO L231 Difference]: Finished difference. Result has 169 places, 226 transitions, 2424 flow [2024-06-14 13:37:45,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=169, PETRI_TRANSITIONS=226} [2024-06-14 13:37:45,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 13:37:45,499 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 226 transitions, 2424 flow [2024-06-14 13:37:45,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:45,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:45,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:37:45,501 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:45,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1607134213, now seen corresponding path program 2 times [2024-06-14 13:37:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:45,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538104070] [2024-06-14 13:37:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:46,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538104070] [2024-06-14 13:37:46,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538104070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:46,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:46,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:46,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46040300] [2024-06-14 13:37:46,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:46,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:46,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 226 transitions, 2424 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:46,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:46,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:46,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:47,000 INFO L124 PetriNetUnfolderBase]: 2130/3304 cut-off events. [2024-06-14 13:37:47,001 INFO L125 PetriNetUnfolderBase]: For 184750/184750 co-relation queries the response was YES. [2024-06-14 13:37:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24416 conditions, 3304 events. 2130/3304 cut-off events. For 184750/184750 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17184 event pairs, 581 based on Foata normal form. 1/3302 useless extension candidates. Maximal degree in co-relation 24333. Up to 3114 conditions per place. [2024-06-14 13:37:47,025 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 218 selfloop transitions, 23 changer transitions 0/246 dead transitions. [2024-06-14 13:37:47,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 246 transitions, 2974 flow [2024-06-14 13:37:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:37:47,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:37:47,026 INFO L175 Difference]: Start difference. First operand has 169 places, 226 transitions, 2424 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:37:47,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 246 transitions, 2974 flow [2024-06-14 13:37:47,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 246 transitions, 2886 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:47,155 INFO L231 Difference]: Finished difference. Result has 171 places, 226 transitions, 2392 flow [2024-06-14 13:37:47,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=171, PETRI_TRANSITIONS=226} [2024-06-14 13:37:47,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 13:37:47,155 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 226 transitions, 2392 flow [2024-06-14 13:37:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:47,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:47,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:47,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:37:47,156 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:47,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1794376929, now seen corresponding path program 1 times [2024-06-14 13:37:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:47,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582954735] [2024-06-14 13:37:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582954735] [2024-06-14 13:37:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582954735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450958174] [2024-06-14 13:37:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:47,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:47,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:47,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 226 transitions, 2392 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:47,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:47,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:48,459 INFO L124 PetriNetUnfolderBase]: 2140/3319 cut-off events. [2024-06-14 13:37:48,459 INFO L125 PetriNetUnfolderBase]: For 193433/193436 co-relation queries the response was YES. [2024-06-14 13:37:48,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24668 conditions, 3319 events. 2140/3319 cut-off events. For 193433/193436 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17248 event pairs, 587 based on Foata normal form. 2/3317 useless extension candidates. Maximal degree in co-relation 24584. Up to 3090 conditions per place. [2024-06-14 13:37:48,488 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 215 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-14 13:37:48,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 249 transitions, 3001 flow [2024-06-14 13:37:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:37:48,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:37:48,489 INFO L175 Difference]: Start difference. First operand has 171 places, 226 transitions, 2392 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:37:48,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 249 transitions, 3001 flow [2024-06-14 13:37:48,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 249 transitions, 2914 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:48,614 INFO L231 Difference]: Finished difference. Result has 173 places, 230 transitions, 2437 flow [2024-06-14 13:37:48,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2437, PETRI_PLACES=173, PETRI_TRANSITIONS=230} [2024-06-14 13:37:48,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 13:37:48,615 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 230 transitions, 2437 flow [2024-06-14 13:37:48,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:48,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:48,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:48,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:37:48,615 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:48,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:48,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1595701413, now seen corresponding path program 2 times [2024-06-14 13:37:48,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:48,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67092314] [2024-06-14 13:37:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:48,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:49,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67092314] [2024-06-14 13:37:49,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67092314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:49,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:49,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773747155] [2024-06-14 13:37:49,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:49,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:49,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:49,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 230 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:49,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:49,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:49,979 INFO L124 PetriNetUnfolderBase]: 2174/3363 cut-off events. [2024-06-14 13:37:49,979 INFO L125 PetriNetUnfolderBase]: For 197130/197133 co-relation queries the response was YES. [2024-06-14 13:37:49,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25205 conditions, 3363 events. 2174/3363 cut-off events. For 197130/197133 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17502 event pairs, 592 based on Foata normal form. 2/3361 useless extension candidates. Maximal degree in co-relation 25119. Up to 3108 conditions per place. [2024-06-14 13:37:50,010 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 213 selfloop transitions, 39 changer transitions 0/257 dead transitions. [2024-06-14 13:37:50,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 257 transitions, 3237 flow [2024-06-14 13:37:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:37:50,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:37:50,013 INFO L175 Difference]: Start difference. First operand has 173 places, 230 transitions, 2437 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:37:50,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 257 transitions, 3237 flow [2024-06-14 13:37:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 257 transitions, 3190 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:37:50,185 INFO L231 Difference]: Finished difference. Result has 178 places, 239 transitions, 2660 flow [2024-06-14 13:37:50,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2660, PETRI_PLACES=178, PETRI_TRANSITIONS=239} [2024-06-14 13:37:50,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-14 13:37:50,186 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 239 transitions, 2660 flow [2024-06-14 13:37:50,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:50,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:50,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:37:50,186 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:50,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1768755741, now seen corresponding path program 3 times [2024-06-14 13:37:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:50,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711687624] [2024-06-14 13:37:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:50,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711687624] [2024-06-14 13:37:50,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711687624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:50,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:50,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:50,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083793332] [2024-06-14 13:37:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:50,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:50,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 239 transitions, 2660 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:50,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:50,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:50,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:51,544 INFO L124 PetriNetUnfolderBase]: 2168/3354 cut-off events. [2024-06-14 13:37:51,544 INFO L125 PetriNetUnfolderBase]: For 203709/203709 co-relation queries the response was YES. [2024-06-14 13:37:51,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25396 conditions, 3354 events. 2168/3354 cut-off events. For 203709/203709 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17445 event pairs, 608 based on Foata normal form. 2/3344 useless extension candidates. Maximal degree in co-relation 25308. Up to 3129 conditions per place. [2024-06-14 13:37:51,576 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 221 selfloop transitions, 30 changer transitions 0/256 dead transitions. [2024-06-14 13:37:51,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 256 transitions, 3222 flow [2024-06-14 13:37:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:37:51,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:37:51,577 INFO L175 Difference]: Start difference. First operand has 178 places, 239 transitions, 2660 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:37:51,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 256 transitions, 3222 flow [2024-06-14 13:37:51,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 3144 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:51,756 INFO L231 Difference]: Finished difference. Result has 181 places, 239 transitions, 2648 flow [2024-06-14 13:37:51,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2648, PETRI_PLACES=181, PETRI_TRANSITIONS=239} [2024-06-14 13:37:51,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 13:37:51,756 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 239 transitions, 2648 flow [2024-06-14 13:37:51,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:51,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:51,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:51,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:37:51,757 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:51,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1304064605, now seen corresponding path program 4 times [2024-06-14 13:37:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:51,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012878582] [2024-06-14 13:37:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012878582] [2024-06-14 13:37:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012878582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:52,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823368150] [2024-06-14 13:37:52,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:52,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:52,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:52,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:52,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 239 transitions, 2648 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:52,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:52,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:52,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:53,128 INFO L124 PetriNetUnfolderBase]: 2152/3332 cut-off events. [2024-06-14 13:37:53,128 INFO L125 PetriNetUnfolderBase]: For 209306/209306 co-relation queries the response was YES. [2024-06-14 13:37:53,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25217 conditions, 3332 events. 2152/3332 cut-off events. For 209306/209306 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17403 event pairs, 600 based on Foata normal form. 4/3324 useless extension candidates. Maximal degree in co-relation 25128. Up to 3055 conditions per place. [2024-06-14 13:37:53,153 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 40 changer transitions 0/254 dead transitions. [2024-06-14 13:37:53,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 3198 flow [2024-06-14 13:37:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:37:53,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:37:53,155 INFO L175 Difference]: Start difference. First operand has 181 places, 239 transitions, 2648 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:37:53,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 3198 flow [2024-06-14 13:37:53,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 3100 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:53,313 INFO L231 Difference]: Finished difference. Result has 181 places, 239 transitions, 2638 flow [2024-06-14 13:37:53,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2638, PETRI_PLACES=181, PETRI_TRANSITIONS=239} [2024-06-14 13:37:53,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 13:37:53,313 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 239 transitions, 2638 flow [2024-06-14 13:37:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:53,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:53,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:53,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:37:53,314 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:53,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -478051585, now seen corresponding path program 5 times [2024-06-14 13:37:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:53,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987123289] [2024-06-14 13:37:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:53,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987123289] [2024-06-14 13:37:53,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987123289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:53,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:53,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232432986] [2024-06-14 13:37:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:54,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:54,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 239 transitions, 2638 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:54,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:54,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:54,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:54,629 INFO L124 PetriNetUnfolderBase]: 2186/3397 cut-off events. [2024-06-14 13:37:54,630 INFO L125 PetriNetUnfolderBase]: For 220070/220073 co-relation queries the response was YES. [2024-06-14 13:37:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25713 conditions, 3397 events. 2186/3397 cut-off events. For 220070/220073 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17852 event pairs, 592 based on Foata normal form. 6/3392 useless extension candidates. Maximal degree in co-relation 25625. Up to 2844 conditions per place. [2024-06-14 13:37:54,660 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 172 selfloop transitions, 84 changer transitions 0/261 dead transitions. [2024-06-14 13:37:54,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 261 transitions, 3489 flow [2024-06-14 13:37:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:37:54,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:37:54,661 INFO L175 Difference]: Start difference. First operand has 181 places, 239 transitions, 2638 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:37:54,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 261 transitions, 3489 flow [2024-06-14 13:37:54,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 261 transitions, 3379 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:54,871 INFO L231 Difference]: Finished difference. Result has 182 places, 246 transitions, 2812 flow [2024-06-14 13:37:54,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2812, PETRI_PLACES=182, PETRI_TRANSITIONS=246} [2024-06-14 13:37:54,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 13:37:54,871 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 246 transitions, 2812 flow [2024-06-14 13:37:54,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:54,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:54,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:37:54,871 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:54,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -471385345, now seen corresponding path program 6 times [2024-06-14 13:37:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:54,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015709205] [2024-06-14 13:37:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:55,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015709205] [2024-06-14 13:37:55,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015709205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:55,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:55,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:55,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937341401] [2024-06-14 13:37:55,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:55,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:55,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:55,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:55,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 246 transitions, 2812 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:55,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:55,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:55,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:56,220 INFO L124 PetriNetUnfolderBase]: 2162/3357 cut-off events. [2024-06-14 13:37:56,220 INFO L125 PetriNetUnfolderBase]: For 222516/222519 co-relation queries the response was YES. [2024-06-14 13:37:56,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25581 conditions, 3357 events. 2162/3357 cut-off events. For 222516/222519 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17577 event pairs, 605 based on Foata normal form. 6/3352 useless extension candidates. Maximal degree in co-relation 25492. Up to 2828 conditions per place. [2024-06-14 13:37:56,251 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 175 selfloop transitions, 80 changer transitions 0/260 dead transitions. [2024-06-14 13:37:56,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 260 transitions, 3464 flow [2024-06-14 13:37:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:37:56,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:37:56,252 INFO L175 Difference]: Start difference. First operand has 182 places, 246 transitions, 2812 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:37:56,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 260 transitions, 3464 flow [2024-06-14 13:37:56,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 260 transitions, 3167 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:56,448 INFO L231 Difference]: Finished difference. Result has 183 places, 246 transitions, 2688 flow [2024-06-14 13:37:56,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2688, PETRI_PLACES=183, PETRI_TRANSITIONS=246} [2024-06-14 13:37:56,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 13:37:56,449 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 246 transitions, 2688 flow [2024-06-14 13:37:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:56,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:56,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:56,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:37:56,449 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:56,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash 207655867, now seen corresponding path program 1 times [2024-06-14 13:37:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:56,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861437759] [2024-06-14 13:37:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861437759] [2024-06-14 13:37:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861437759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:57,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559049957] [2024-06-14 13:37:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:57,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:57,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:57,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:57,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:57,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 246 transitions, 2688 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:57,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:57,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:57,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:57,887 INFO L124 PetriNetUnfolderBase]: 2172/3372 cut-off events. [2024-06-14 13:37:57,887 INFO L125 PetriNetUnfolderBase]: For 224316/224316 co-relation queries the response was YES. [2024-06-14 13:37:57,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25669 conditions, 3372 events. 2172/3372 cut-off events. For 224316/224316 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17643 event pairs, 592 based on Foata normal form. 2/3365 useless extension candidates. Maximal degree in co-relation 25580. Up to 3154 conditions per place. [2024-06-14 13:37:57,917 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 223 selfloop transitions, 37 changer transitions 0/265 dead transitions. [2024-06-14 13:37:57,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 265 transitions, 3372 flow [2024-06-14 13:37:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:37:57,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:37:57,918 INFO L175 Difference]: Start difference. First operand has 183 places, 246 transitions, 2688 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:37:57,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 265 transitions, 3372 flow [2024-06-14 13:37:58,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 3169 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:58,078 INFO L231 Difference]: Finished difference. Result has 184 places, 252 transitions, 2680 flow [2024-06-14 13:37:58,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2680, PETRI_PLACES=184, PETRI_TRANSITIONS=252} [2024-06-14 13:37:58,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 13:37:58,079 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 252 transitions, 2680 flow [2024-06-14 13:37:58,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:58,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:58,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:58,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:37:58,079 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:58,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 208160857, now seen corresponding path program 2 times [2024-06-14 13:37:58,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:58,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655494531] [2024-06-14 13:37:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:58,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655494531] [2024-06-14 13:37:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655494531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:58,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:58,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461554231] [2024-06-14 13:37:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:58,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:58,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:58,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:37:58,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 252 transitions, 2680 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:58,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:58,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:37:58,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:59,556 INFO L124 PetriNetUnfolderBase]: 2170/3371 cut-off events. [2024-06-14 13:37:59,557 INFO L125 PetriNetUnfolderBase]: For 228923/228923 co-relation queries the response was YES. [2024-06-14 13:37:59,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25769 conditions, 3371 events. 2170/3371 cut-off events. For 228923/228923 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17684 event pairs, 592 based on Foata normal form. 1/3363 useless extension candidates. Maximal degree in co-relation 25679. Up to 3139 conditions per place. [2024-06-14 13:37:59,584 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-14 13:37:59,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 270 transitions, 3328 flow [2024-06-14 13:37:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:37:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:37:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:37:59,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:37:59,585 INFO L175 Difference]: Start difference. First operand has 184 places, 252 transitions, 2680 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:37:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 270 transitions, 3328 flow [2024-06-14 13:37:59,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 270 transitions, 3206 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:59,775 INFO L231 Difference]: Finished difference. Result has 187 places, 257 transitions, 2730 flow [2024-06-14 13:37:59,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2730, PETRI_PLACES=187, PETRI_TRANSITIONS=257} [2024-06-14 13:37:59,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 13:37:59,775 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 257 transitions, 2730 flow [2024-06-14 13:37:59,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:59,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:59,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:37:59,776 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:59,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1299311933, now seen corresponding path program 1 times [2024-06-14 13:37:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:59,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96641039] [2024-06-14 13:37:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96641039] [2024-06-14 13:38:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96641039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:00,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:00,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:00,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196059087] [2024-06-14 13:38:00,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:00,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:00,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:00,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:00,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 257 transitions, 2730 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:00,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:00,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:00,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:01,506 INFO L124 PetriNetUnfolderBase]: 2180/3392 cut-off events. [2024-06-14 13:38:01,506 INFO L125 PetriNetUnfolderBase]: For 238826/238826 co-relation queries the response was YES. [2024-06-14 13:38:01,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26070 conditions, 3392 events. 2180/3392 cut-off events. For 238826/238826 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17869 event pairs, 565 based on Foata normal form. 2/3391 useless extension candidates. Maximal degree in co-relation 25978. Up to 3193 conditions per place. [2024-06-14 13:38:01,532 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 16 changer transitions 0/278 dead transitions. [2024-06-14 13:38:01,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 278 transitions, 3384 flow [2024-06-14 13:38:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:38:01,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:38:01,533 INFO L175 Difference]: Start difference. First operand has 187 places, 257 transitions, 2730 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:38:01,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 278 transitions, 3384 flow [2024-06-14 13:38:01,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 278 transitions, 3289 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:38:01,672 INFO L231 Difference]: Finished difference. Result has 190 places, 260 transitions, 2727 flow [2024-06-14 13:38:01,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2727, PETRI_PLACES=190, PETRI_TRANSITIONS=260} [2024-06-14 13:38:01,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-14 13:38:01,673 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 260 transitions, 2727 flow [2024-06-14 13:38:01,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:01,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:01,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:01,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:38:01,673 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)] === [2024-06-14 13:38:01,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1707660091, now seen corresponding path program 1 times [2024-06-14 13:38:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:01,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386718660] [2024-06-14 13:38:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:01,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:02,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:02,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386718660] [2024-06-14 13:38:02,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386718660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:02,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:02,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076936290] [2024-06-14 13:38:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:02,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:02,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:02,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 260 transitions, 2727 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:02,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:02,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:03,236 INFO L124 PetriNetUnfolderBase]: 2174/3369 cut-off events. [2024-06-14 13:38:03,236 INFO L125 PetriNetUnfolderBase]: For 244221/244221 co-relation queries the response was YES. [2024-06-14 13:38:03,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26253 conditions, 3369 events. 2174/3369 cut-off events. For 244221/244221 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17604 event pairs, 583 based on Foata normal form. 2/3362 useless extension candidates. Maximal degree in co-relation 26160. Up to 3060 conditions per place. [2024-06-14 13:38:03,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 52 changer transitions 0/279 dead transitions. [2024-06-14 13:38:03,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 279 transitions, 3466 flow [2024-06-14 13:38:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:38:03,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:38:03,270 INFO L175 Difference]: Start difference. First operand has 190 places, 260 transitions, 2727 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:38:03,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 279 transitions, 3466 flow [2024-06-14 13:38:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 279 transitions, 3378 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:03,467 INFO L231 Difference]: Finished difference. Result has 193 places, 263 transitions, 2828 flow [2024-06-14 13:38:03,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=193, PETRI_TRANSITIONS=263} [2024-06-14 13:38:03,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 13:38:03,468 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 263 transitions, 2828 flow [2024-06-14 13:38:03,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:03,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:03,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:03,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:38:03,468 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)] === [2024-06-14 13:38:03,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:03,469 INFO L85 PathProgramCache]: Analyzing trace with hash -699450547, now seen corresponding path program 2 times [2024-06-14 13:38:03,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:03,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702901165] [2024-06-14 13:38:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:04,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:04,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702901165] [2024-06-14 13:38:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702901165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:04,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558297140] [2024-06-14 13:38:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:04,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:04,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:04,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:04,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 263 transitions, 2828 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:04,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:04,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:04,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:05,237 INFO L124 PetriNetUnfolderBase]: 2184/3396 cut-off events. [2024-06-14 13:38:05,237 INFO L125 PetriNetUnfolderBase]: For 253513/253513 co-relation queries the response was YES. [2024-06-14 13:38:05,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26704 conditions, 3396 events. 2184/3396 cut-off events. For 253513/253513 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17875 event pairs, 557 based on Foata normal form. 2/3395 useless extension candidates. Maximal degree in co-relation 26609. Up to 3182 conditions per place. [2024-06-14 13:38:05,272 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 254 selfloop transitions, 24 changer transitions 0/283 dead transitions. [2024-06-14 13:38:05,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 283 transitions, 3492 flow [2024-06-14 13:38:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:38:05,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:38:05,273 INFO L175 Difference]: Start difference. First operand has 193 places, 263 transitions, 2828 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:38:05,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 283 transitions, 3492 flow [2024-06-14 13:38:05,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 283 transitions, 3372 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:05,471 INFO L231 Difference]: Finished difference. Result has 195 places, 266 transitions, 2823 flow [2024-06-14 13:38:05,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=195, PETRI_TRANSITIONS=266} [2024-06-14 13:38:05,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-14 13:38:05,472 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 266 transitions, 2823 flow [2024-06-14 13:38:05,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:05,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:05,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:38:05,473 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)] === [2024-06-14 13:38:05,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash -471376417, now seen corresponding path program 3 times [2024-06-14 13:38:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:05,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805624388] [2024-06-14 13:38:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:06,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805624388] [2024-06-14 13:38:06,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805624388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:06,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831152781] [2024-06-14 13:38:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:06,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:06,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:06,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 266 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:06,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:06,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:06,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:07,251 INFO L124 PetriNetUnfolderBase]: 2178/3387 cut-off events. [2024-06-14 13:38:07,251 INFO L125 PetriNetUnfolderBase]: For 248731/248734 co-relation queries the response was YES. [2024-06-14 13:38:07,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26573 conditions, 3387 events. 2178/3387 cut-off events. For 248731/248734 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17856 event pairs, 568 based on Foata normal form. 2/3385 useless extension candidates. Maximal degree in co-relation 26478. Up to 3159 conditions per place. [2024-06-14 13:38:07,283 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 249 selfloop transitions, 30 changer transitions 0/284 dead transitions. [2024-06-14 13:38:07,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 284 transitions, 3487 flow [2024-06-14 13:38:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:38:07,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:38:07,284 INFO L175 Difference]: Start difference. First operand has 195 places, 266 transitions, 2823 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:38:07,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 284 transitions, 3487 flow [2024-06-14 13:38:07,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 284 transitions, 3369 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:07,448 INFO L231 Difference]: Finished difference. Result has 196 places, 269 transitions, 2837 flow [2024-06-14 13:38:07,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2837, PETRI_PLACES=196, PETRI_TRANSITIONS=269} [2024-06-14 13:38:07,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 13:38:07,449 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 269 transitions, 2837 flow [2024-06-14 13:38:07,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:07,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:07,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:07,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:38:07,449 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:07,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:07,450 INFO L85 PathProgramCache]: Analyzing trace with hash -79326169, now seen corresponding path program 1 times [2024-06-14 13:38:07,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:07,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265025344] [2024-06-14 13:38:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265025344] [2024-06-14 13:38:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265025344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:08,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:08,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:08,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566755594] [2024-06-14 13:38:08,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:08,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:08,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:08,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:08,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:08,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 269 transitions, 2837 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:08,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:08,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:08,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:09,641 INFO L124 PetriNetUnfolderBase]: 2347/3659 cut-off events. [2024-06-14 13:38:09,641 INFO L125 PetriNetUnfolderBase]: For 297740/297740 co-relation queries the response was YES. [2024-06-14 13:38:09,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29385 conditions, 3659 events. 2347/3659 cut-off events. For 297740/297740 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19853 event pairs, 492 based on Foata normal form. 16/3672 useless extension candidates. Maximal degree in co-relation 29290. Up to 3031 conditions per place. [2024-06-14 13:38:09,675 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 29 changer transitions 0/322 dead transitions. [2024-06-14 13:38:09,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 322 transitions, 3919 flow [2024-06-14 13:38:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:38:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:38:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 13:38:09,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 13:38:09,677 INFO L175 Difference]: Start difference. First operand has 196 places, 269 transitions, 2837 flow. Second operand 10 states and 192 transitions. [2024-06-14 13:38:09,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 322 transitions, 3919 flow [2024-06-14 13:38:09,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 322 transitions, 3811 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:09,979 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 2875 flow [2024-06-14 13:38:09,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2875, PETRI_PLACES=201, PETRI_TRANSITIONS=271} [2024-06-14 13:38:09,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:38:09,980 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 2875 flow [2024-06-14 13:38:09,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:09,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:09,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:09,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:38:09,980 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:09,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash 480429909, now seen corresponding path program 2 times [2024-06-14 13:38:09,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:09,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666739267] [2024-06-14 13:38:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:09,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:11,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:11,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666739267] [2024-06-14 13:38:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666739267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:11,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:11,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282548839] [2024-06-14 13:38:11,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:11,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:11,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:11,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 271 transitions, 2875 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:11,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:11,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:11,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:12,345 INFO L124 PetriNetUnfolderBase]: 2405/3767 cut-off events. [2024-06-14 13:38:12,345 INFO L125 PetriNetUnfolderBase]: For 307133/307133 co-relation queries the response was YES. [2024-06-14 13:38:12,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30255 conditions, 3767 events. 2405/3767 cut-off events. For 307133/307133 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20432 event pairs, 603 based on Foata normal form. 16/3780 useless extension candidates. Maximal degree in co-relation 30159. Up to 3221 conditions per place. [2024-06-14 13:38:12,383 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 286 selfloop transitions, 26 changer transitions 0/317 dead transitions. [2024-06-14 13:38:12,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 3893 flow [2024-06-14 13:38:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:38:12,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:38:12,385 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 2875 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:38:12,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 3893 flow [2024-06-14 13:38:12,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 317 transitions, 3828 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:12,708 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 2910 flow [2024-06-14 13:38:12,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-14 13:38:12,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 13:38:12,709 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 2910 flow [2024-06-14 13:38:12,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:12,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:12,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:12,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:38:12,709 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:12,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1136551503, now seen corresponding path program 3 times [2024-06-14 13:38:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947059427] [2024-06-14 13:38:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:13,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947059427] [2024-06-14 13:38:13,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947059427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:13,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:13,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630590900] [2024-06-14 13:38:13,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:13,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:13,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:14,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:14,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 2910 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:14,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:14,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:14,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:14,920 INFO L124 PetriNetUnfolderBase]: 2369/3711 cut-off events. [2024-06-14 13:38:14,920 INFO L125 PetriNetUnfolderBase]: For 303509/303509 co-relation queries the response was YES. [2024-06-14 13:38:14,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29077 conditions, 3711 events. 2369/3711 cut-off events. For 303509/303509 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20084 event pairs, 605 based on Foata normal form. 20/3728 useless extension candidates. Maximal degree in co-relation 28979. Up to 3349 conditions per place. [2024-06-14 13:38:14,952 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2024-06-14 13:38:14,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 310 transitions, 3674 flow [2024-06-14 13:38:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:38:14,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:38:14,953 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 2910 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:38:14,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 310 transitions, 3674 flow [2024-06-14 13:38:15,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 310 transitions, 3572 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:15,269 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 2863 flow [2024-06-14 13:38:15,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2863, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2024-06-14 13:38:15,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 13:38:15,269 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 2863 flow [2024-06-14 13:38:15,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:15,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:15,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:15,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:38:15,270 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:15,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:15,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1445424145, now seen corresponding path program 4 times [2024-06-14 13:38:15,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:15,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561217917] [2024-06-14 13:38:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:15,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:16,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561217917] [2024-06-14 13:38:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561217917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219830037] [2024-06-14 13:38:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:16,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:16,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:16,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 2863 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:16,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:17,709 INFO L124 PetriNetUnfolderBase]: 2538/4001 cut-off events. [2024-06-14 13:38:17,709 INFO L125 PetriNetUnfolderBase]: For 332382/332385 co-relation queries the response was YES. [2024-06-14 13:38:17,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31538 conditions, 4001 events. 2538/4001 cut-off events. For 332382/332385 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22189 event pairs, 562 based on Foata normal form. 16/4013 useless extension candidates. Maximal degree in co-relation 31439. Up to 3137 conditions per place. [2024-06-14 13:38:17,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 62 changer transitions 0/322 dead transitions. [2024-06-14 13:38:17,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 322 transitions, 3949 flow [2024-06-14 13:38:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 13:38:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-14 13:38:17,746 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 2863 flow. Second operand 9 states and 184 transitions. [2024-06-14 13:38:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 322 transitions, 3949 flow [2024-06-14 13:38:18,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 322 transitions, 3896 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:18,085 INFO L231 Difference]: Finished difference. Result has 207 places, 274 transitions, 3026 flow [2024-06-14 13:38:18,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3026, PETRI_PLACES=207, PETRI_TRANSITIONS=274} [2024-06-14 13:38:18,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 13:38:18,086 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 274 transitions, 3026 flow [2024-06-14 13:38:18,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:18,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:18,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:38:18,087 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:18,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1440662545, now seen corresponding path program 5 times [2024-06-14 13:38:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484135684] [2024-06-14 13:38:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484135684] [2024-06-14 13:38:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484135684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:19,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:19,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215243717] [2024-06-14 13:38:19,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:19,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:19,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 274 transitions, 3026 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:19,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:19,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:20,646 INFO L124 PetriNetUnfolderBase]: 2613/4131 cut-off events. [2024-06-14 13:38:20,646 INFO L125 PetriNetUnfolderBase]: For 353649/353652 co-relation queries the response was YES. [2024-06-14 13:38:20,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32847 conditions, 4131 events. 2613/4131 cut-off events. For 353649/353652 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23207 event pairs, 592 based on Foata normal form. 20/4147 useless extension candidates. Maximal degree in co-relation 32747. Up to 3461 conditions per place. [2024-06-14 13:38:20,686 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 252 selfloop transitions, 60 changer transitions 0/317 dead transitions. [2024-06-14 13:38:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 317 transitions, 3858 flow [2024-06-14 13:38:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 13:38:20,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-14 13:38:20,687 INFO L175 Difference]: Start difference. First operand has 207 places, 274 transitions, 3026 flow. Second operand 9 states and 179 transitions. [2024-06-14 13:38:20,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 317 transitions, 3858 flow [2024-06-14 13:38:21,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 317 transitions, 3744 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:21,069 INFO L231 Difference]: Finished difference. Result has 211 places, 275 transitions, 3085 flow [2024-06-14 13:38:21,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3085, PETRI_PLACES=211, PETRI_TRANSITIONS=275} [2024-06-14 13:38:21,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-14 13:38:21,070 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 275 transitions, 3085 flow [2024-06-14 13:38:21,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:21,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:21,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:21,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:38:21,070 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:21,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1811015823, now seen corresponding path program 6 times [2024-06-14 13:38:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014838813] [2024-06-14 13:38:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:21,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:22,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:22,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014838813] [2024-06-14 13:38:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014838813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:22,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306929715] [2024-06-14 13:38:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:22,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:22,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:22,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 275 transitions, 3085 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:22,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:22,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:22,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:23,541 INFO L124 PetriNetUnfolderBase]: 2577/4075 cut-off events. [2024-06-14 13:38:23,541 INFO L125 PetriNetUnfolderBase]: For 337872/337875 co-relation queries the response was YES. [2024-06-14 13:38:23,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31660 conditions, 4075 events. 2577/4075 cut-off events. For 337872/337875 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22831 event pairs, 574 based on Foata normal form. 20/4091 useless extension candidates. Maximal degree in co-relation 31558. Up to 3405 conditions per place. [2024-06-14 13:38:23,582 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 60 changer transitions 0/315 dead transitions. [2024-06-14 13:38:23,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 315 transitions, 3863 flow [2024-06-14 13:38:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 13:38:23,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 13:38:23,584 INFO L175 Difference]: Start difference. First operand has 211 places, 275 transitions, 3085 flow. Second operand 9 states and 176 transitions. [2024-06-14 13:38:23,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 315 transitions, 3863 flow [2024-06-14 13:38:24,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 315 transitions, 3708 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:24,021 INFO L231 Difference]: Finished difference. Result has 213 places, 275 transitions, 3057 flow [2024-06-14 13:38:24,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3057, PETRI_PLACES=213, PETRI_TRANSITIONS=275} [2024-06-14 13:38:24,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 13:38:24,022 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 275 transitions, 3057 flow [2024-06-14 13:38:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:24,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:24,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:38:24,022 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:24,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 679204623, now seen corresponding path program 1 times [2024-06-14 13:38:24,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:24,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395530827] [2024-06-14 13:38:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:24,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:25,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:25,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395530827] [2024-06-14 13:38:25,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395530827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:25,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:25,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:25,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115153606] [2024-06-14 13:38:25,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:25,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:25,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:25,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:25,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 275 transitions, 3057 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:25,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:25,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:25,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:26,615 INFO L124 PetriNetUnfolderBase]: 2618/4141 cut-off events. [2024-06-14 13:38:26,615 INFO L125 PetriNetUnfolderBase]: For 337582/337585 co-relation queries the response was YES. [2024-06-14 13:38:26,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31985 conditions, 4141 events. 2618/4141 cut-off events. For 337582/337585 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23410 event pairs, 570 based on Foata normal form. 12/4149 useless extension candidates. Maximal degree in co-relation 31882. Up to 3149 conditions per place. [2024-06-14 13:38:26,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 249 selfloop transitions, 64 changer transitions 0/318 dead transitions. [2024-06-14 13:38:26,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 3905 flow [2024-06-14 13:38:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 13:38:26,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 13:38:26,659 INFO L175 Difference]: Start difference. First operand has 213 places, 275 transitions, 3057 flow. Second operand 9 states and 177 transitions. [2024-06-14 13:38:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 3905 flow [2024-06-14 13:38:27,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 318 transitions, 3775 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:27,130 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3107 flow [2024-06-14 13:38:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3107, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-06-14 13:38:27,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 13:38:27,131 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3107 flow [2024-06-14 13:38:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:27,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:27,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:38:27,131 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 102692170, now seen corresponding path program 1 times [2024-06-14 13:38:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:27,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389904230] [2024-06-14 13:38:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389904230] [2024-06-14 13:38:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389904230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177562371] [2024-06-14 13:38:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:27,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:27,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3107 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:27,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:27,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:27,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:28,807 INFO L124 PetriNetUnfolderBase]: 2623/4153 cut-off events. [2024-06-14 13:38:28,807 INFO L125 PetriNetUnfolderBase]: For 335734/335737 co-relation queries the response was YES. [2024-06-14 13:38:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32260 conditions, 4153 events. 2623/4153 cut-off events. For 335734/335737 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23390 event pairs, 712 based on Foata normal form. 1/4150 useless extension candidates. Maximal degree in co-relation 32156. Up to 3889 conditions per place. [2024-06-14 13:38:28,847 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 31 changer transitions 0/298 dead transitions. [2024-06-14 13:38:28,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 298 transitions, 3809 flow [2024-06-14 13:38:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:38:28,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:38:28,848 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3107 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:38:28,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 298 transitions, 3809 flow [2024-06-14 13:38:29,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 298 transitions, 3651 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:29,267 INFO L231 Difference]: Finished difference. Result has 214 places, 279 transitions, 3077 flow [2024-06-14 13:38:29,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3077, PETRI_PLACES=214, PETRI_TRANSITIONS=279} [2024-06-14 13:38:29,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 13:38:29,268 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 279 transitions, 3077 flow [2024-06-14 13:38:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:29,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:29,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:29,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:38:29,268 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:29,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash -543543855, now seen corresponding path program 7 times [2024-06-14 13:38:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:29,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241653113] [2024-06-14 13:38:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:30,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:30,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241653113] [2024-06-14 13:38:30,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241653113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:30,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:30,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:30,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940565352] [2024-06-14 13:38:30,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:30,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:30,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:30,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:30,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 279 transitions, 3077 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:30,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:30,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:30,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:31,633 INFO L124 PetriNetUnfolderBase]: 2698/4266 cut-off events. [2024-06-14 13:38:31,633 INFO L125 PetriNetUnfolderBase]: For 370910/370910 co-relation queries the response was YES. [2024-06-14 13:38:31,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32872 conditions, 4266 events. 2698/4266 cut-off events. For 370910/370910 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24246 event pairs, 592 based on Foata normal form. 20/4271 useless extension candidates. Maximal degree in co-relation 32767. Up to 3608 conditions per place. [2024-06-14 13:38:31,681 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 61 changer transitions 0/316 dead transitions. [2024-06-14 13:38:31,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 316 transitions, 3891 flow [2024-06-14 13:38:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:38:31,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:38:31,683 INFO L175 Difference]: Start difference. First operand has 214 places, 279 transitions, 3077 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:38:31,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 316 transitions, 3891 flow [2024-06-14 13:38:32,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 3821 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:32,098 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3184 flow [2024-06-14 13:38:32,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3184, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-14 13:38:32,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 13:38:32,099 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3184 flow [2024-06-14 13:38:32,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:32,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:32,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:32,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:38:32,100 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:32,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:32,100 INFO L85 PathProgramCache]: Analyzing trace with hash 53783535, now seen corresponding path program 8 times [2024-06-14 13:38:32,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:32,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819845589] [2024-06-14 13:38:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819845589] [2024-06-14 13:38:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819845589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330784609] [2024-06-14 13:38:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:33,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:33,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3184 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:33,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:33,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:33,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:34,588 INFO L124 PetriNetUnfolderBase]: 2773/4401 cut-off events. [2024-06-14 13:38:34,588 INFO L125 PetriNetUnfolderBase]: For 377963/377963 co-relation queries the response was YES. [2024-06-14 13:38:34,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34038 conditions, 4401 events. 2773/4401 cut-off events. For 377963/377963 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25311 event pairs, 607 based on Foata normal form. 20/4406 useless extension candidates. Maximal degree in co-relation 33933. Up to 3733 conditions per place. [2024-06-14 13:38:34,631 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 59 changer transitions 0/319 dead transitions. [2024-06-14 13:38:34,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 319 transitions, 4012 flow [2024-06-14 13:38:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:38:34,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 13:38:34,632 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3184 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:38:34,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 319 transitions, 4012 flow [2024-06-14 13:38:35,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 319 transitions, 3863 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:35,058 INFO L231 Difference]: Finished difference. Result has 219 places, 281 transitions, 3210 flow [2024-06-14 13:38:35,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=219, PETRI_TRANSITIONS=281} [2024-06-14 13:38:35,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:38:35,059 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 281 transitions, 3210 flow [2024-06-14 13:38:35,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:35,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:35,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:35,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:38:35,059 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -174295245, now seen corresponding path program 9 times [2024-06-14 13:38:35,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:35,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711346958] [2024-06-14 13:38:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:36,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711346958] [2024-06-14 13:38:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711346958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769775640] [2024-06-14 13:38:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:36,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:36,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:36,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:36,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 281 transitions, 3210 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:36,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:36,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:36,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:37,641 INFO L124 PetriNetUnfolderBase]: 2892/4607 cut-off events. [2024-06-14 13:38:37,642 INFO L125 PetriNetUnfolderBase]: For 404458/404458 co-relation queries the response was YES. [2024-06-14 13:38:37,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36031 conditions, 4607 events. 2892/4607 cut-off events. For 404458/404458 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26801 event pairs, 626 based on Foata normal form. 16/4608 useless extension candidates. Maximal degree in co-relation 35925. Up to 3510 conditions per place. [2024-06-14 13:38:37,691 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-14 13:38:37,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 4334 flow [2024-06-14 13:38:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 13:38:37,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-14 13:38:37,692 INFO L175 Difference]: Start difference. First operand has 219 places, 281 transitions, 3210 flow. Second operand 9 states and 178 transitions. [2024-06-14 13:38:37,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 4334 flow [2024-06-14 13:38:38,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 327 transitions, 4187 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:38,166 INFO L231 Difference]: Finished difference. Result has 221 places, 283 transitions, 3301 flow [2024-06-14 13:38:38,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3301, PETRI_PLACES=221, PETRI_TRANSITIONS=283} [2024-06-14 13:38:38,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-14 13:38:38,166 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 283 transitions, 3301 flow [2024-06-14 13:38:38,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:38,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:38,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:38:38,167 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:38,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash 485756211, now seen corresponding path program 10 times [2024-06-14 13:38:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:38,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765241986] [2024-06-14 13:38:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:38,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:39,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765241986] [2024-06-14 13:38:39,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765241986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:39,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:39,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:39,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680727914] [2024-06-14 13:38:39,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:39,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:39,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 283 transitions, 3301 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:39,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:39,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:40,603 INFO L124 PetriNetUnfolderBase]: 2856/4546 cut-off events. [2024-06-14 13:38:40,604 INFO L125 PetriNetUnfolderBase]: For 391126/391126 co-relation queries the response was YES. [2024-06-14 13:38:40,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34596 conditions, 4546 events. 2856/4546 cut-off events. For 391126/391126 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26407 event pairs, 628 based on Foata normal form. 20/4551 useless extension candidates. Maximal degree in co-relation 34489. Up to 3878 conditions per place. [2024-06-14 13:38:40,653 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 61 changer transitions 0/321 dead transitions. [2024-06-14 13:38:40,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 321 transitions, 4085 flow [2024-06-14 13:38:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:38:40,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 13:38:40,654 INFO L175 Difference]: Start difference. First operand has 221 places, 283 transitions, 3301 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:38:40,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 321 transitions, 4085 flow [2024-06-14 13:38:41,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 321 transitions, 3945 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:41,307 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3290 flow [2024-06-14 13:38:41,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3290, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-14 13:38:41,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 13:38:41,308 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3290 flow [2024-06-14 13:38:41,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:41,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:41,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:41,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:38:41,309 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:41,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 62361359, now seen corresponding path program 2 times [2024-06-14 13:38:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:41,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076360359] [2024-06-14 13:38:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:42,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076360359] [2024-06-14 13:38:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076360359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:42,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:42,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761351572] [2024-06-14 13:38:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:42,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:42,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:42,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:42,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3290 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:42,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:42,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:42,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:44,106 INFO L124 PetriNetUnfolderBase]: 2897/4627 cut-off events. [2024-06-14 13:38:44,106 INFO L125 PetriNetUnfolderBase]: For 385807/385807 co-relation queries the response was YES. [2024-06-14 13:38:44,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34995 conditions, 4627 events. 2897/4627 cut-off events. For 385807/385807 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27116 event pairs, 633 based on Foata normal form. 12/4624 useless extension candidates. Maximal degree in co-relation 34886. Up to 3742 conditions per place. [2024-06-14 13:38:44,154 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 62 changer transitions 0/324 dead transitions. [2024-06-14 13:38:44,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 324 transitions, 4152 flow [2024-06-14 13:38:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:38:44,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:38:44,155 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3290 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:38:44,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 324 transitions, 4152 flow [2024-06-14 13:38:44,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 324 transitions, 4015 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:44,628 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3337 flow [2024-06-14 13:38:44,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3337, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-14 13:38:44,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 13:38:44,629 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3337 flow [2024-06-14 13:38:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:44,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:44,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:38:44,629 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:44,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash 960044849, now seen corresponding path program 3 times [2024-06-14 13:38:44,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:44,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229132057] [2024-06-14 13:38:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229132057] [2024-06-14 13:38:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229132057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:46,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:46,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:46,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833276992] [2024-06-14 13:38:46,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:46,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:46,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:46,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3337 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:46,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:46,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:46,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:47,691 INFO L124 PetriNetUnfolderBase]: 2938/4708 cut-off events. [2024-06-14 13:38:47,691 INFO L125 PetriNetUnfolderBase]: For 400803/400803 co-relation queries the response was YES. [2024-06-14 13:38:47,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 4708 events. 2938/4708 cut-off events. For 400803/400803 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27824 event pairs, 648 based on Foata normal form. 12/4705 useless extension candidates. Maximal degree in co-relation 35573. Up to 3933 conditions per place. [2024-06-14 13:38:47,734 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 63 changer transitions 0/323 dead transitions. [2024-06-14 13:38:47,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 323 transitions, 4193 flow [2024-06-14 13:38:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:38:47,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:38:47,735 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3337 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:38:47,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 323 transitions, 4193 flow [2024-06-14 13:38:48,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 323 transitions, 4031 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:48,198 INFO L231 Difference]: Finished difference. Result has 228 places, 285 transitions, 3363 flow [2024-06-14 13:38:48,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3363, PETRI_PLACES=228, PETRI_TRANSITIONS=285} [2024-06-14 13:38:48,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:38:48,198 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 285 transitions, 3363 flow [2024-06-14 13:38:48,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:48,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:48,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:48,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:38:48,198 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:48,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1260201315, now seen corresponding path program 4 times [2024-06-14 13:38:48,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:48,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789099603] [2024-06-14 13:38:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789099603] [2024-06-14 13:38:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789099603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:49,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:49,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:49,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241966189] [2024-06-14 13:38:49,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:49,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:49,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 285 transitions, 3363 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:49,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:49,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:49,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:50,829 INFO L124 PetriNetUnfolderBase]: 2918/4676 cut-off events. [2024-06-14 13:38:50,829 INFO L125 PetriNetUnfolderBase]: For 391097/391097 co-relation queries the response was YES. [2024-06-14 13:38:50,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34736 conditions, 4676 events. 2918/4676 cut-off events. For 391097/391097 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27594 event pairs, 594 based on Foata normal form. 12/4673 useless extension candidates. Maximal degree in co-relation 34625. Up to 3017 conditions per place. [2024-06-14 13:38:50,876 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 242 selfloop transitions, 75 changer transitions 0/322 dead transitions. [2024-06-14 13:38:50,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 322 transitions, 4079 flow [2024-06-14 13:38:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:38:50,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:38:50,878 INFO L175 Difference]: Start difference. First operand has 228 places, 285 transitions, 3363 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:38:50,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 322 transitions, 4079 flow [2024-06-14 13:38:51,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 322 transitions, 3913 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:51,366 INFO L231 Difference]: Finished difference. Result has 229 places, 284 transitions, 3267 flow [2024-06-14 13:38:51,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3267, PETRI_PLACES=229, PETRI_TRANSITIONS=284} [2024-06-14 13:38:51,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 13:38:51,366 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 284 transitions, 3267 flow [2024-06-14 13:38:51,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:51,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:51,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:51,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:38:51,367 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:51,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1128008244, now seen corresponding path program 2 times [2024-06-14 13:38:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:51,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903981960] [2024-06-14 13:38:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903981960] [2024-06-14 13:38:52,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903981960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:52,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:52,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525939976] [2024-06-14 13:38:52,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:52,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:52,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:52,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 284 transitions, 3267 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:52,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:52,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:52,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:53,221 INFO L124 PetriNetUnfolderBase]: 2915/4675 cut-off events. [2024-06-14 13:38:53,221 INFO L125 PetriNetUnfolderBase]: For 380677/380677 co-relation queries the response was YES. [2024-06-14 13:38:53,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34716 conditions, 4675 events. 2915/4675 cut-off events. For 380677/380677 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27585 event pairs, 794 based on Foata normal form. 1/4667 useless extension candidates. Maximal degree in co-relation 34604. Up to 4390 conditions per place. [2024-06-14 13:38:53,264 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 265 selfloop transitions, 31 changer transitions 0/301 dead transitions. [2024-06-14 13:38:53,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 301 transitions, 3919 flow [2024-06-14 13:38:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:38:53,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:38:53,266 INFO L175 Difference]: Start difference. First operand has 229 places, 284 transitions, 3267 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:38:53,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 301 transitions, 3919 flow [2024-06-14 13:38:53,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 301 transitions, 3611 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-14 13:38:53,760 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3031 flow [2024-06-14 13:38:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3031, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-14 13:38:53,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 13:38:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3031 flow [2024-06-14 13:38:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:38:53,761 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:53,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1397841234, now seen corresponding path program 3 times [2024-06-14 13:38:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248121707] [2024-06-14 13:38:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:54,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248121707] [2024-06-14 13:38:54,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248121707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:54,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:54,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352848167] [2024-06-14 13:38:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:54,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:54,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:54,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3031 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:54,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:54,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:54,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:55,627 INFO L124 PetriNetUnfolderBase]: 2905/4661 cut-off events. [2024-06-14 13:38:55,628 INFO L125 PetriNetUnfolderBase]: For 383579/383579 co-relation queries the response was YES. [2024-06-14 13:38:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33386 conditions, 4661 events. 2905/4661 cut-off events. For 383579/383579 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27517 event pairs, 790 based on Foata normal form. 2/4654 useless extension candidates. Maximal degree in co-relation 33276. Up to 4302 conditions per place. [2024-06-14 13:38:55,668 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 51 changer transitions 0/299 dead transitions. [2024-06-14 13:38:55,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 299 transitions, 3671 flow [2024-06-14 13:38:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:38:55,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:38:55,669 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3031 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:38:55,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 299 transitions, 3671 flow [2024-06-14 13:38:56,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 299 transitions, 3576 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:56,212 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3052 flow [2024-06-14 13:38:56,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-14 13:38:56,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 13:38:56,213 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3052 flow [2024-06-14 13:38:56,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:56,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:56,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:56,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:38:56,214 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:56,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1461533141, now seen corresponding path program 1 times [2024-06-14 13:38:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:56,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88207409] [2024-06-14 13:38:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88207409] [2024-06-14 13:38:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88207409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:57,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:57,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:57,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726905117] [2024-06-14 13:38:57,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:57,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:57,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:57,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3052 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:57,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:57,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:57,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:58,130 INFO L124 PetriNetUnfolderBase]: 3021/4837 cut-off events. [2024-06-14 13:38:58,131 INFO L125 PetriNetUnfolderBase]: For 412275/412275 co-relation queries the response was YES. [2024-06-14 13:38:58,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35087 conditions, 4837 events. 3021/4837 cut-off events. For 412275/412275 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28678 event pairs, 815 based on Foata normal form. 2/4830 useless extension candidates. Maximal degree in co-relation 34978. Up to 4404 conditions per place. [2024-06-14 13:38:58,178 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 255 selfloop transitions, 49 changer transitions 0/309 dead transitions. [2024-06-14 13:38:58,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 309 transitions, 3985 flow [2024-06-14 13:38:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:38:58,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:38:58,178 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3052 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:38:58,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 309 transitions, 3985 flow [2024-06-14 13:38:58,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 3849 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:58,763 INFO L231 Difference]: Finished difference. Result has 228 places, 289 transitions, 3128 flow [2024-06-14 13:38:58,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3128, PETRI_PLACES=228, PETRI_TRANSITIONS=289} [2024-06-14 13:38:58,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:38:58,764 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 289 transitions, 3128 flow [2024-06-14 13:38:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:58,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:58,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:38:58,764 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:58,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1462067891, now seen corresponding path program 2 times [2024-06-14 13:38:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942582793] [2024-06-14 13:38:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942582793] [2024-06-14 13:38:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942582793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:59,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:59,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802091348] [2024-06-14 13:38:59,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:59,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:38:59,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 289 transitions, 3128 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:59,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:59,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:38:59,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:00,667 INFO L124 PetriNetUnfolderBase]: 3047/4879 cut-off events. [2024-06-14 13:39:00,667 INFO L125 PetriNetUnfolderBase]: For 432692/432692 co-relation queries the response was YES. [2024-06-14 13:39:00,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35316 conditions, 4879 events. 3047/4879 cut-off events. For 432692/432692 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28963 event pairs, 824 based on Foata normal form. 14/4884 useless extension candidates. Maximal degree in co-relation 35206. Up to 4547 conditions per place. [2024-06-14 13:39:00,721 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 253 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-14 13:39:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 308 transitions, 3851 flow [2024-06-14 13:39:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:39:00,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:39:00,722 INFO L175 Difference]: Start difference. First operand has 228 places, 289 transitions, 3128 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:39:00,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 308 transitions, 3851 flow [2024-06-14 13:39:01,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 308 transitions, 3761 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:01,352 INFO L231 Difference]: Finished difference. Result has 233 places, 291 transitions, 3193 flow [2024-06-14 13:39:01,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3193, PETRI_PLACES=233, PETRI_TRANSITIONS=291} [2024-06-14 13:39:01,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 13:39:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 291 transitions, 3193 flow [2024-06-14 13:39:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:39:01,353 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:01,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash -883151087, now seen corresponding path program 1 times [2024-06-14 13:39:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762226572] [2024-06-14 13:39:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:02,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:02,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762226572] [2024-06-14 13:39:02,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762226572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:02,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:02,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:02,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435851820] [2024-06-14 13:39:02,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:02,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:02,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:02,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:02,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:02,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:02,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 291 transitions, 3193 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:02,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:02,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:02,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:03,482 INFO L124 PetriNetUnfolderBase]: 3103/4961 cut-off events. [2024-06-14 13:39:03,482 INFO L125 PetriNetUnfolderBase]: For 428322/428322 co-relation queries the response was YES. [2024-06-14 13:39:03,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36479 conditions, 4961 events. 3103/4961 cut-off events. For 428322/428322 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29517 event pairs, 747 based on Foata normal form. 4/4956 useless extension candidates. Maximal degree in co-relation 36367. Up to 4543 conditions per place. [2024-06-14 13:39:03,536 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 44 changer transitions 0/320 dead transitions. [2024-06-14 13:39:03,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 4167 flow [2024-06-14 13:39:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:39:03,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:39:03,544 INFO L175 Difference]: Start difference. First operand has 233 places, 291 transitions, 3193 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:39:03,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 4167 flow [2024-06-14 13:39:04,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 320 transitions, 4035 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:04,195 INFO L231 Difference]: Finished difference. Result has 235 places, 299 transitions, 3316 flow [2024-06-14 13:39:04,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=235, PETRI_TRANSITIONS=299} [2024-06-14 13:39:04,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-14 13:39:04,195 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 299 transitions, 3316 flow [2024-06-14 13:39:04,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:04,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:04,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:04,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:39:04,196 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:04,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1397856889, now seen corresponding path program 2 times [2024-06-14 13:39:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:04,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618022127] [2024-06-14 13:39:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:05,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:05,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618022127] [2024-06-14 13:39:05,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618022127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:05,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:05,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797795777] [2024-06-14 13:39:05,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:05,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:05,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:05,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 299 transitions, 3316 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:05,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:05,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:06,543 INFO L124 PetriNetUnfolderBase]: 3187/5078 cut-off events. [2024-06-14 13:39:06,543 INFO L125 PetriNetUnfolderBase]: For 464727/464727 co-relation queries the response was YES. [2024-06-14 13:39:06,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38588 conditions, 5078 events. 3187/5078 cut-off events. For 464727/464727 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30214 event pairs, 737 based on Foata normal form. 4/5073 useless extension candidates. Maximal degree in co-relation 38474. Up to 4484 conditions per place. [2024-06-14 13:39:06,604 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 249 selfloop transitions, 79 changer transitions 0/333 dead transitions. [2024-06-14 13:39:06,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 333 transitions, 4558 flow [2024-06-14 13:39:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:39:06,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:39:06,605 INFO L175 Difference]: Start difference. First operand has 235 places, 299 transitions, 3316 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:39:06,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 333 transitions, 4558 flow [2024-06-14 13:39:07,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 333 transitions, 4429 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:07,434 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 3642 flow [2024-06-14 13:39:07,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3642, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-06-14 13:39:07,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 13:39:07,435 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 3642 flow [2024-06-14 13:39:07,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:07,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:07,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:39:07,435 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:07,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash -883006937, now seen corresponding path program 3 times [2024-06-14 13:39:07,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552394792] [2024-06-14 13:39:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:08,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552394792] [2024-06-14 13:39:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552394792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:08,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:08,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:08,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656940659] [2024-06-14 13:39:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:08,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:08,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:08,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 3642 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:08,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:08,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:08,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:09,673 INFO L124 PetriNetUnfolderBase]: 3179/5067 cut-off events. [2024-06-14 13:39:09,673 INFO L125 PetriNetUnfolderBase]: For 470275/470275 co-relation queries the response was YES. [2024-06-14 13:39:09,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39117 conditions, 5067 events. 3179/5067 cut-off events. For 470275/470275 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30176 event pairs, 753 based on Foata normal form. 4/5062 useless extension candidates. Maximal degree in co-relation 39000. Up to 4481 conditions per place. [2024-06-14 13:39:09,733 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 254 selfloop transitions, 73 changer transitions 0/332 dead transitions. [2024-06-14 13:39:09,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 332 transitions, 4646 flow [2024-06-14 13:39:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:39:09,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:39:09,735 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 3642 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:39:09,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 332 transitions, 4646 flow [2024-06-14 13:39:10,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 332 transitions, 4459 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-14 13:39:10,458 INFO L231 Difference]: Finished difference. Result has 245 places, 311 transitions, 3609 flow [2024-06-14 13:39:10,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3455, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=245, PETRI_TRANSITIONS=311} [2024-06-14 13:39:10,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:39:10,459 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 311 transitions, 3609 flow [2024-06-14 13:39:10,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:10,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:10,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:10,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:39:10,459 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:10,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1541957165, now seen corresponding path program 1 times [2024-06-14 13:39:10,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:10,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917434850] [2024-06-14 13:39:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:11,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917434850] [2024-06-14 13:39:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917434850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:11,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:11,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709606174] [2024-06-14 13:39:11,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:11,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:11,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:11,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 311 transitions, 3609 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:11,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:11,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:11,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:12,522 INFO L124 PetriNetUnfolderBase]: 3231/5146 cut-off events. [2024-06-14 13:39:12,522 INFO L125 PetriNetUnfolderBase]: For 492687/492687 co-relation queries the response was YES. [2024-06-14 13:39:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39387 conditions, 5146 events. 3231/5146 cut-off events. For 492687/492687 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30641 event pairs, 844 based on Foata normal form. 8/5142 useless extension candidates. Maximal degree in co-relation 39268. Up to 4757 conditions per place. [2024-06-14 13:39:12,583 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 49 changer transitions 0/338 dead transitions. [2024-06-14 13:39:12,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 338 transitions, 4459 flow [2024-06-14 13:39:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:39:12,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:39:12,585 INFO L175 Difference]: Start difference. First operand has 245 places, 311 transitions, 3609 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:39:12,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 338 transitions, 4459 flow [2024-06-14 13:39:13,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 338 transitions, 4236 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:39:13,366 INFO L231 Difference]: Finished difference. Result has 247 places, 318 transitions, 3627 flow [2024-06-14 13:39:13,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3627, PETRI_PLACES=247, PETRI_TRANSITIONS=318} [2024-06-14 13:39:13,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-14 13:39:13,366 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 318 transitions, 3627 flow [2024-06-14 13:39:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:13,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:13,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:13,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:39:13,366 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:13,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1727759653, now seen corresponding path program 4 times [2024-06-14 13:39:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715705592] [2024-06-14 13:39:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715705592] [2024-06-14 13:39:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715705592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863257087] [2024-06-14 13:39:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:14,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:14,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 318 transitions, 3627 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:14,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:14,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:14,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:15,671 INFO L124 PetriNetUnfolderBase]: 3283/5221 cut-off events. [2024-06-14 13:39:15,671 INFO L125 PetriNetUnfolderBase]: For 510889/510892 co-relation queries the response was YES. [2024-06-14 13:39:15,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40262 conditions, 5221 events. 3283/5221 cut-off events. For 510889/510892 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31212 event pairs, 808 based on Foata normal form. 4/5214 useless extension candidates. Maximal degree in co-relation 40143. Up to 4425 conditions per place. [2024-06-14 13:39:15,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 252 selfloop transitions, 96 changer transitions 0/353 dead transitions. [2024-06-14 13:39:15,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 353 transitions, 5115 flow [2024-06-14 13:39:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:39:15,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:39:15,733 INFO L175 Difference]: Start difference. First operand has 247 places, 318 transitions, 3627 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:39:15,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 353 transitions, 5115 flow [2024-06-14 13:39:16,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 353 transitions, 4948 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:16,497 INFO L231 Difference]: Finished difference. Result has 251 places, 330 transitions, 3960 flow [2024-06-14 13:39:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3960, PETRI_PLACES=251, PETRI_TRANSITIONS=330} [2024-06-14 13:39:16,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 13:39:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 330 transitions, 3960 flow [2024-06-14 13:39:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:16,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:39:16,498 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1471172337, now seen corresponding path program 5 times [2024-06-14 13:39:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:16,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368631324] [2024-06-14 13:39:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368631324] [2024-06-14 13:39:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368631324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:17,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:17,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422523129] [2024-06-14 13:39:17,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:17,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:17,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:17,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:17,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 330 transitions, 3960 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:17,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:17,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:17,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:19,040 INFO L124 PetriNetUnfolderBase]: 3275/5209 cut-off events. [2024-06-14 13:39:19,040 INFO L125 PetriNetUnfolderBase]: For 516700/516703 co-relation queries the response was YES. [2024-06-14 13:39:19,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40732 conditions, 5209 events. 3275/5209 cut-off events. For 516700/516703 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31154 event pairs, 810 based on Foata normal form. 4/5202 useless extension candidates. Maximal degree in co-relation 40610. Up to 4422 conditions per place. [2024-06-14 13:39:19,095 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 95 changer transitions 0/350 dead transitions. [2024-06-14 13:39:19,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 350 transitions, 5044 flow [2024-06-14 13:39:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:39:19,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:39:19,097 INFO L175 Difference]: Start difference. First operand has 251 places, 330 transitions, 3960 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:39:19,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 350 transitions, 5044 flow [2024-06-14 13:39:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 350 transitions, 4849 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-14 13:39:19,841 INFO L231 Difference]: Finished difference. Result has 257 places, 330 transitions, 3963 flow [2024-06-14 13:39:19,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3963, PETRI_PLACES=257, PETRI_TRANSITIONS=330} [2024-06-14 13:39:19,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 13:39:19,842 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 330 transitions, 3963 flow [2024-06-14 13:39:19,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:19,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:19,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:19,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:39:19,842 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:19,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:19,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1892539123, now seen corresponding path program 2 times [2024-06-14 13:39:19,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:19,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893160427] [2024-06-14 13:39:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:19,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:20,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:20,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893160427] [2024-06-14 13:39:20,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893160427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:20,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:20,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349303199] [2024-06-14 13:39:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:20,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:20,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:20,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 330 transitions, 3963 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:20,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:20,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:20,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:22,126 INFO L124 PetriNetUnfolderBase]: 3327/5285 cut-off events. [2024-06-14 13:39:22,126 INFO L125 PetriNetUnfolderBase]: For 542138/542141 co-relation queries the response was YES. [2024-06-14 13:39:22,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41574 conditions, 5285 events. 3327/5285 cut-off events. For 542138/542141 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31611 event pairs, 859 based on Foata normal form. 8/5282 useless extension candidates. Maximal degree in co-relation 41450. Up to 4654 conditions per place. [2024-06-14 13:39:22,186 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 100 changer transitions 0/356 dead transitions. [2024-06-14 13:39:22,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 356 transitions, 5015 flow [2024-06-14 13:39:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:39:22,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 13:39:22,187 INFO L175 Difference]: Start difference. First operand has 257 places, 330 transitions, 3963 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:39:22,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 356 transitions, 5015 flow [2024-06-14 13:39:22,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 356 transitions, 4841 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:22,982 INFO L231 Difference]: Finished difference. Result has 262 places, 337 transitions, 4146 flow [2024-06-14 13:39:22,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4146, PETRI_PLACES=262, PETRI_TRANSITIONS=337} [2024-06-14 13:39:22,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:39:22,983 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 337 transitions, 4146 flow [2024-06-14 13:39:22,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:22,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:22,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:22,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:39:22,983 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:22,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1471057333, now seen corresponding path program 6 times [2024-06-14 13:39:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:22,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448996681] [2024-06-14 13:39:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:22,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:24,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448996681] [2024-06-14 13:39:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448996681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:24,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:24,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82228929] [2024-06-14 13:39:24,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:24,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:24,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:24,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:24,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 337 transitions, 4146 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:24,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:24,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:24,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:25,351 INFO L124 PetriNetUnfolderBase]: 3367/5332 cut-off events. [2024-06-14 13:39:25,351 INFO L125 PetriNetUnfolderBase]: For 558148/558151 co-relation queries the response was YES. [2024-06-14 13:39:25,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42330 conditions, 5332 events. 3367/5332 cut-off events. For 558148/558151 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31818 event pairs, 800 based on Foata normal form. 8/5329 useless extension candidates. Maximal degree in co-relation 42204. Up to 4296 conditions per place. [2024-06-14 13:39:25,411 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 227 selfloop transitions, 139 changer transitions 0/371 dead transitions. [2024-06-14 13:39:25,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 371 transitions, 5554 flow [2024-06-14 13:39:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:39:25,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:39:25,412 INFO L175 Difference]: Start difference. First operand has 262 places, 337 transitions, 4146 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:39:25,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 371 transitions, 5554 flow [2024-06-14 13:39:26,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 371 transitions, 5262 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:26,240 INFO L231 Difference]: Finished difference. Result has 264 places, 351 transitions, 4463 flow [2024-06-14 13:39:26,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4463, PETRI_PLACES=264, PETRI_TRANSITIONS=351} [2024-06-14 13:39:26,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 13:39:26,240 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 351 transitions, 4463 flow [2024-06-14 13:39:26,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:26,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:26,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:39:26,240 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:26,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1471049397, now seen corresponding path program 3 times [2024-06-14 13:39:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277575012] [2024-06-14 13:39:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:27,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277575012] [2024-06-14 13:39:27,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277575012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:27,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:27,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923888514] [2024-06-14 13:39:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:27,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:27,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 351 transitions, 4463 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:27,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:27,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:28,291 INFO L124 PetriNetUnfolderBase]: 3399/5388 cut-off events. [2024-06-14 13:39:28,292 INFO L125 PetriNetUnfolderBase]: For 575136/575139 co-relation queries the response was YES. [2024-06-14 13:39:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43268 conditions, 5388 events. 3399/5388 cut-off events. For 575136/575139 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32232 event pairs, 852 based on Foata normal form. 8/5385 useless extension candidates. Maximal degree in co-relation 43141. Up to 4749 conditions per place. [2024-06-14 13:39:28,353 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 111 changer transitions 0/371 dead transitions. [2024-06-14 13:39:28,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 371 transitions, 5359 flow [2024-06-14 13:39:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:39:28,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:39:28,354 INFO L175 Difference]: Start difference. First operand has 264 places, 351 transitions, 4463 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:39:28,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 371 transitions, 5359 flow [2024-06-14 13:39:29,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 371 transitions, 5180 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-14 13:39:29,246 INFO L231 Difference]: Finished difference. Result has 269 places, 355 transitions, 4644 flow [2024-06-14 13:39:29,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=269, PETRI_TRANSITIONS=355} [2024-06-14 13:39:29,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-14 13:39:29,247 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 355 transitions, 4644 flow [2024-06-14 13:39:29,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:29,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:29,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:29,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:39:29,247 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:29,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1461526197, now seen corresponding path program 4 times [2024-06-14 13:39:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:29,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032432764] [2024-06-14 13:39:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:30,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:30,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032432764] [2024-06-14 13:39:30,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032432764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:30,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:30,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:30,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682410848] [2024-06-14 13:39:30,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:30,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:30,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:30,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:30,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:30,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:30,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 355 transitions, 4644 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:30,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:30,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:30,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:31,267 INFO L124 PetriNetUnfolderBase]: 3457/5482 cut-off events. [2024-06-14 13:39:31,268 INFO L125 PetriNetUnfolderBase]: For 601454/601457 co-relation queries the response was YES. [2024-06-14 13:39:31,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44869 conditions, 5482 events. 3457/5482 cut-off events. For 601454/601457 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 32926 event pairs, 850 based on Foata normal form. 8/5479 useless extension candidates. Maximal degree in co-relation 44740. Up to 4688 conditions per place. [2024-06-14 13:39:31,336 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 123 changer transitions 0/380 dead transitions. [2024-06-14 13:39:31,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 380 transitions, 5976 flow [2024-06-14 13:39:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:39:31,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:39:31,337 INFO L175 Difference]: Start difference. First operand has 269 places, 355 transitions, 4644 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:39:31,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 380 transitions, 5976 flow [2024-06-14 13:39:32,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 380 transitions, 5674 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:32,235 INFO L231 Difference]: Finished difference. Result has 271 places, 361 transitions, 4808 flow [2024-06-14 13:39:32,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=271, PETRI_TRANSITIONS=361} [2024-06-14 13:39:32,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 13:39:32,236 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 361 transitions, 4808 flow [2024-06-14 13:39:32,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:32,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:32,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:32,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:39:32,237 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:32,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1461852627, now seen corresponding path program 5 times [2024-06-14 13:39:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:32,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323971453] [2024-06-14 13:39:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:33,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:33,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323971453] [2024-06-14 13:39:33,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323971453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:33,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:33,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:33,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697059490] [2024-06-14 13:39:33,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:33,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:33,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:33,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:33,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:33,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:33,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 361 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:33,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:33,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:34,244 INFO L124 PetriNetUnfolderBase]: 3437/5453 cut-off events. [2024-06-14 13:39:34,245 INFO L125 PetriNetUnfolderBase]: For 593207/593210 co-relation queries the response was YES. [2024-06-14 13:39:34,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44032 conditions, 5453 events. 3437/5453 cut-off events. For 593207/593210 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32758 event pairs, 863 based on Foata normal form. 8/5450 useless extension candidates. Maximal degree in co-relation 43902. Up to 4816 conditions per place. [2024-06-14 13:39:34,309 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 262 selfloop transitions, 111 changer transitions 0/378 dead transitions. [2024-06-14 13:39:34,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 378 transitions, 5768 flow [2024-06-14 13:39:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:39:34,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:39:34,310 INFO L175 Difference]: Start difference. First operand has 271 places, 361 transitions, 4808 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:39:34,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 378 transitions, 5768 flow [2024-06-14 13:39:35,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 378 transitions, 5455 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:35,161 INFO L231 Difference]: Finished difference. Result has 275 places, 361 transitions, 4723 flow [2024-06-14 13:39:35,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4723, PETRI_PLACES=275, PETRI_TRANSITIONS=361} [2024-06-14 13:39:35,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:39:35,162 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 361 transitions, 4723 flow [2024-06-14 13:39:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:35,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:35,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:39:35,162 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:35,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1786795930, now seen corresponding path program 1 times [2024-06-14 13:39:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998841513] [2024-06-14 13:39:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:35,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:35,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998841513] [2024-06-14 13:39:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998841513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:35,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:35,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952045264] [2024-06-14 13:39:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:35,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:35,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:35,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 361 transitions, 4723 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:37,249 INFO L124 PetriNetUnfolderBase]: 3447/5473 cut-off events. [2024-06-14 13:39:37,249 INFO L125 PetriNetUnfolderBase]: For 580615/580615 co-relation queries the response was YES. [2024-06-14 13:39:37,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43993 conditions, 5473 events. 3447/5473 cut-off events. For 580615/580615 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32880 event pairs, 846 based on Foata normal form. 2/5472 useless extension candidates. Maximal degree in co-relation 43861. Up to 5186 conditions per place. [2024-06-14 13:39:37,315 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-06-14 13:39:37,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 396 transitions, 5696 flow [2024-06-14 13:39:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:39:37,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 13:39:37,316 INFO L175 Difference]: Start difference. First operand has 275 places, 361 transitions, 4723 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:39:37,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 396 transitions, 5696 flow [2024-06-14 13:39:38,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 396 transitions, 5434 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:38,307 INFO L231 Difference]: Finished difference. Result has 278 places, 367 transitions, 4623 flow [2024-06-14 13:39:38,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=278, PETRI_TRANSITIONS=367} [2024-06-14 13:39:38,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:39:38,308 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 367 transitions, 4623 flow [2024-06-14 13:39:38,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:38,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:38,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:38,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:39:38,308 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:38,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1397034274, now seen corresponding path program 2 times [2024-06-14 13:39:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:38,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707422963] [2024-06-14 13:39:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:38,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:39,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707422963] [2024-06-14 13:39:39,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707422963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:39,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:39,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781909600] [2024-06-14 13:39:39,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:39,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:39,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 367 transitions, 4623 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:39,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:39,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:39,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:40,390 INFO L124 PetriNetUnfolderBase]: 3465/5489 cut-off events. [2024-06-14 13:39:40,390 INFO L125 PetriNetUnfolderBase]: For 593785/593785 co-relation queries the response was YES. [2024-06-14 13:39:40,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44626 conditions, 5489 events. 3465/5489 cut-off events. For 593785/593785 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32793 event pairs, 859 based on Foata normal form. 2/5488 useless extension candidates. Maximal degree in co-relation 44492. Up to 5193 conditions per place. [2024-06-14 13:39:40,453 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 37 changer transitions 0/401 dead transitions. [2024-06-14 13:39:40,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 401 transitions, 5833 flow [2024-06-14 13:39:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:39:40,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:39:40,454 INFO L175 Difference]: Start difference. First operand has 278 places, 367 transitions, 4623 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:39:40,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 401 transitions, 5833 flow [2024-06-14 13:39:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 401 transitions, 5719 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:41,524 INFO L231 Difference]: Finished difference. Result has 281 places, 373 transitions, 4752 flow [2024-06-14 13:39:41,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4752, PETRI_PLACES=281, PETRI_TRANSITIONS=373} [2024-06-14 13:39:41,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-14 13:39:41,524 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 373 transitions, 4752 flow [2024-06-14 13:39:41,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:41,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:41,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:41,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:39:41,525 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:41,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:41,525 INFO L85 PathProgramCache]: Analyzing trace with hash -833033378, now seen corresponding path program 3 times [2024-06-14 13:39:41,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:41,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511994311] [2024-06-14 13:39:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:41,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:42,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511994311] [2024-06-14 13:39:42,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511994311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:42,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:42,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:42,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565076939] [2024-06-14 13:39:42,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:42,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:42,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:42,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:42,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 373 transitions, 4752 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:42,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:42,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:42,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:43,593 INFO L124 PetriNetUnfolderBase]: 3475/5506 cut-off events. [2024-06-14 13:39:43,593 INFO L125 PetriNetUnfolderBase]: For 611180/611183 co-relation queries the response was YES. [2024-06-14 13:39:43,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45218 conditions, 5506 events. 3475/5506 cut-off events. For 611180/611183 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 32944 event pairs, 855 based on Foata normal form. 2/5504 useless extension candidates. Maximal degree in co-relation 45083. Up to 5115 conditions per place. [2024-06-14 13:39:43,658 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 353 selfloop transitions, 45 changer transitions 0/403 dead transitions. [2024-06-14 13:39:43,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 403 transitions, 5740 flow [2024-06-14 13:39:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:39:43,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:39:43,659 INFO L175 Difference]: Start difference. First operand has 281 places, 373 transitions, 4752 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:39:43,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 403 transitions, 5740 flow [2024-06-14 13:39:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 403 transitions, 5614 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:44,868 INFO L231 Difference]: Finished difference. Result has 285 places, 379 transitions, 4838 flow [2024-06-14 13:39:44,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4838, PETRI_PLACES=285, PETRI_TRANSITIONS=379} [2024-06-14 13:39:44,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-14 13:39:44,868 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 379 transitions, 4838 flow [2024-06-14 13:39:44,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:44,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:44,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:44,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:39:44,869 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:44,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:44,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1111342370, now seen corresponding path program 4 times [2024-06-14 13:39:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:44,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931086171] [2024-06-14 13:39:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:44,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:45,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:45,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931086171] [2024-06-14 13:39:45,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931086171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:45,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:45,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:45,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86319101] [2024-06-14 13:39:45,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:45,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:45,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:45,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 379 transitions, 4838 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:45,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:45,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:45,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:47,031 INFO L124 PetriNetUnfolderBase]: 3485/5527 cut-off events. [2024-06-14 13:39:47,031 INFO L125 PetriNetUnfolderBase]: For 626430/626433 co-relation queries the response was YES. [2024-06-14 13:39:47,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46106 conditions, 5527 events. 3485/5527 cut-off events. For 626430/626433 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33153 event pairs, 848 based on Foata normal form. 2/5525 useless extension candidates. Maximal degree in co-relation 45968. Up to 5115 conditions per place. [2024-06-14 13:39:47,098 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 50 changer transitions 0/404 dead transitions. [2024-06-14 13:39:47,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 404 transitions, 5814 flow [2024-06-14 13:39:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:39:47,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:39:47,099 INFO L175 Difference]: Start difference. First operand has 285 places, 379 transitions, 4838 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:39:47,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 404 transitions, 5814 flow [2024-06-14 13:39:48,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 404 transitions, 5680 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:48,404 INFO L231 Difference]: Finished difference. Result has 289 places, 382 transitions, 4906 flow [2024-06-14 13:39:48,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4906, PETRI_PLACES=289, PETRI_TRANSITIONS=382} [2024-06-14 13:39:48,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 13:39:48,405 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 382 transitions, 4906 flow [2024-06-14 13:39:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:48,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:48,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:48,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:39:48,405 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:48,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1369592376, now seen corresponding path program 5 times [2024-06-14 13:39:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519443850] [2024-06-14 13:39:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:49,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:49,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519443850] [2024-06-14 13:39:49,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519443850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:49,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:49,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:49,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378046804] [2024-06-14 13:39:49,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:49,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:49,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:49,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:49,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:49,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:49,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 382 transitions, 4906 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:49,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:49,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:49,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:50,537 INFO L124 PetriNetUnfolderBase]: 3495/5537 cut-off events. [2024-06-14 13:39:50,537 INFO L125 PetriNetUnfolderBase]: For 642077/642077 co-relation queries the response was YES. [2024-06-14 13:39:50,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46710 conditions, 5537 events. 3495/5537 cut-off events. For 642077/642077 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33126 event pairs, 850 based on Foata normal form. 2/5536 useless extension candidates. Maximal degree in co-relation 46571. Up to 5288 conditions per place. [2024-06-14 13:39:50,609 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 372 selfloop transitions, 25 changer transitions 0/402 dead transitions. [2024-06-14 13:39:50,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 402 transitions, 5856 flow [2024-06-14 13:39:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:39:50,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:39:50,611 INFO L175 Difference]: Start difference. First operand has 289 places, 382 transitions, 4906 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:39:50,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 402 transitions, 5856 flow [2024-06-14 13:39:51,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 402 transitions, 5676 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:51,990 INFO L231 Difference]: Finished difference. Result has 291 places, 385 transitions, 4885 flow [2024-06-14 13:39:51,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=291, PETRI_TRANSITIONS=385} [2024-06-14 13:39:51,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 13:39:51,991 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 385 transitions, 4885 flow [2024-06-14 13:39:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:51,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:51,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:51,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:39:51,991 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash 999946974, now seen corresponding path program 6 times [2024-06-14 13:39:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119889013] [2024-06-14 13:39:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:52,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119889013] [2024-06-14 13:39:52,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119889013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:52,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:52,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:52,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007180417] [2024-06-14 13:39:52,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:52,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:52,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:52,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:52,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 385 transitions, 4885 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:52,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:52,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:52,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:54,225 INFO L124 PetriNetUnfolderBase]: 3521/5585 cut-off events. [2024-06-14 13:39:54,225 INFO L125 PetriNetUnfolderBase]: For 666320/666323 co-relation queries the response was YES. [2024-06-14 13:39:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47631 conditions, 5585 events. 3521/5585 cut-off events. For 666320/666323 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33607 event pairs, 850 based on Foata normal form. 2/5583 useless extension candidates. Maximal degree in co-relation 47491. Up to 5072 conditions per place. [2024-06-14 13:39:54,301 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 322 selfloop transitions, 85 changer transitions 0/412 dead transitions. [2024-06-14 13:39:54,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 412 transitions, 6161 flow [2024-06-14 13:39:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:39:54,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:39:54,302 INFO L175 Difference]: Start difference. First operand has 291 places, 385 transitions, 4885 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:39:54,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 412 transitions, 6161 flow [2024-06-14 13:39:55,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 412 transitions, 5995 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:55,727 INFO L231 Difference]: Finished difference. Result has 293 places, 391 transitions, 5105 flow [2024-06-14 13:39:55,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5105, PETRI_PLACES=293, PETRI_TRANSITIONS=391} [2024-06-14 13:39:55,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:39:55,728 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 391 transitions, 5105 flow [2024-06-14 13:39:55,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:55,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:55,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:55,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:39:55,728 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:55,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1406560450, now seen corresponding path program 1 times [2024-06-14 13:39:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676949057] [2024-06-14 13:39:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:56,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:56,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676949057] [2024-06-14 13:39:56,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676949057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:56,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:56,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199258295] [2024-06-14 13:39:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:56,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:56,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:39:56,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 391 transitions, 5105 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:56,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:39:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:57,816 INFO L124 PetriNetUnfolderBase]: 3529/5596 cut-off events. [2024-06-14 13:39:57,817 INFO L125 PetriNetUnfolderBase]: For 684429/684429 co-relation queries the response was YES. [2024-06-14 13:39:57,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48308 conditions, 5596 events. 3529/5596 cut-off events. For 684429/684429 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33677 event pairs, 715 based on Foata normal form. 2/5595 useless extension candidates. Maximal degree in co-relation 48167. Up to 5286 conditions per place. [2024-06-14 13:39:57,896 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 393 selfloop transitions, 21 changer transitions 0/419 dead transitions. [2024-06-14 13:39:57,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 419 transitions, 6077 flow [2024-06-14 13:39:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:39:57,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:39:57,897 INFO L175 Difference]: Start difference. First operand has 293 places, 391 transitions, 5105 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:39:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 419 transitions, 6077 flow [2024-06-14 13:39:59,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 419 transitions, 5906 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:59,278 INFO L231 Difference]: Finished difference. Result has 297 places, 393 transitions, 5043 flow [2024-06-14 13:39:59,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5043, PETRI_PLACES=297, PETRI_TRANSITIONS=393} [2024-06-14 13:39:59,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 13:39:59,279 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 393 transitions, 5043 flow [2024-06-14 13:39:59,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:59,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:59,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:59,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:39:59,279 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:59,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash 624284448, now seen corresponding path program 2 times [2024-06-14 13:39:59,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:59,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987772768] [2024-06-14 13:39:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:59,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:00,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:00,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987772768] [2024-06-14 13:40:00,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987772768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:00,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:00,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511566830] [2024-06-14 13:40:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:00,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:00,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:00,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 393 transitions, 5043 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:00,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:00,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:00,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:01,355 INFO L124 PetriNetUnfolderBase]: 3524/5589 cut-off events. [2024-06-14 13:40:01,355 INFO L125 PetriNetUnfolderBase]: For 684737/684737 co-relation queries the response was YES. [2024-06-14 13:40:01,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47897 conditions, 5589 events. 3524/5589 cut-off events. For 684737/684737 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33640 event pairs, 848 based on Foata normal form. 2/5588 useless extension candidates. Maximal degree in co-relation 47754. Up to 5309 conditions per place. [2024-06-14 13:40:01,431 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 387 selfloop transitions, 25 changer transitions 0/417 dead transitions. [2024-06-14 13:40:01,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 417 transitions, 5999 flow [2024-06-14 13:40:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:40:01,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:40:01,432 INFO L175 Difference]: Start difference. First operand has 297 places, 393 transitions, 5043 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:40:01,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 417 transitions, 5999 flow [2024-06-14 13:40:02,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 417 transitions, 5908 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:02,941 INFO L231 Difference]: Finished difference. Result has 299 places, 395 transitions, 5072 flow [2024-06-14 13:40:02,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5072, PETRI_PLACES=299, PETRI_TRANSITIONS=395} [2024-06-14 13:40:02,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-14 13:40:02,942 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 395 transitions, 5072 flow [2024-06-14 13:40:02,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:02,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:02,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:40:02,942 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:02,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash -170453862, now seen corresponding path program 3 times [2024-06-14 13:40:02,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:02,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663550764] [2024-06-14 13:40:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:02,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:03,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:03,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663550764] [2024-06-14 13:40:03,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663550764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:03,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:03,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:03,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441954183] [2024-06-14 13:40:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:03,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:03,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 395 transitions, 5072 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:03,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:03,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:03,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:05,110 INFO L124 PetriNetUnfolderBase]: 3519/5582 cut-off events. [2024-06-14 13:40:05,111 INFO L125 PetriNetUnfolderBase]: For 692750/692750 co-relation queries the response was YES. [2024-06-14 13:40:05,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47825 conditions, 5582 events. 3519/5582 cut-off events. For 692750/692750 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33613 event pairs, 844 based on Foata normal form. 2/5581 useless extension candidates. Maximal degree in co-relation 47681. Up to 5322 conditions per place. [2024-06-14 13:40:05,191 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 385 selfloop transitions, 24 changer transitions 0/414 dead transitions. [2024-06-14 13:40:05,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 414 transitions, 6005 flow [2024-06-14 13:40:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:40:05,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:40:05,192 INFO L175 Difference]: Start difference. First operand has 299 places, 395 transitions, 5072 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:40:05,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 414 transitions, 6005 flow [2024-06-14 13:40:06,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 414 transitions, 5903 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:06,795 INFO L231 Difference]: Finished difference. Result has 301 places, 397 transitions, 5089 flow [2024-06-14 13:40:06,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5089, PETRI_PLACES=301, PETRI_TRANSITIONS=397} [2024-06-14 13:40:06,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 13:40:06,796 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 397 transitions, 5089 flow [2024-06-14 13:40:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:06,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:06,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:40:06,796 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:06,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1360834938, now seen corresponding path program 1 times [2024-06-14 13:40:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643692386] [2024-06-14 13:40:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:07,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:07,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643692386] [2024-06-14 13:40:07,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643692386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:07,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718106816] [2024-06-14 13:40:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:07,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:07,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 397 transitions, 5089 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:07,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:07,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:07,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:09,102 INFO L124 PetriNetUnfolderBase]: 3566/5650 cut-off events. [2024-06-14 13:40:09,102 INFO L125 PetriNetUnfolderBase]: For 727652/727655 co-relation queries the response was YES. [2024-06-14 13:40:09,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48981 conditions, 5650 events. 3566/5650 cut-off events. For 727652/727655 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34133 event pairs, 865 based on Foata normal form. 3/5635 useless extension candidates. Maximal degree in co-relation 48836. Up to 4751 conditions per place. [2024-06-14 13:40:09,180 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 272 selfloop transitions, 153 changer transitions 0/430 dead transitions. [2024-06-14 13:40:09,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 430 transitions, 6945 flow [2024-06-14 13:40:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:40:09,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:40:09,182 INFO L175 Difference]: Start difference. First operand has 301 places, 397 transitions, 5089 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:40:09,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 430 transitions, 6945 flow [2024-06-14 13:40:10,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 430 transitions, 6847 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:10,968 INFO L231 Difference]: Finished difference. Result has 304 places, 411 transitions, 5798 flow [2024-06-14 13:40:10,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=304, PETRI_TRANSITIONS=411} [2024-06-14 13:40:10,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-14 13:40:10,969 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 411 transitions, 5798 flow [2024-06-14 13:40:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:10,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:10,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:10,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:40:10,970 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:10,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -887568820, now seen corresponding path program 1 times [2024-06-14 13:40:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801656672] [2024-06-14 13:40:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:12,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801656672] [2024-06-14 13:40:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801656672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:12,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:12,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:12,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759085874] [2024-06-14 13:40:12,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:12,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:12,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:12,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 411 transitions, 5798 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:13,515 INFO L124 PetriNetUnfolderBase]: 3576/5682 cut-off events. [2024-06-14 13:40:13,515 INFO L125 PetriNetUnfolderBase]: For 745061/745064 co-relation queries the response was YES. [2024-06-14 13:40:13,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50408 conditions, 5682 events. 3576/5682 cut-off events. For 745061/745064 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34453 event pairs, 778 based on Foata normal form. 2/5680 useless extension candidates. Maximal degree in co-relation 50261. Up to 5272 conditions per place. [2024-06-14 13:40:13,593 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 38 changer transitions 0/440 dead transitions. [2024-06-14 13:40:13,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 440 transitions, 6813 flow [2024-06-14 13:40:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:40:13,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:40:13,594 INFO L175 Difference]: Start difference. First operand has 304 places, 411 transitions, 5798 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:40:13,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 440 transitions, 6813 flow [2024-06-14 13:40:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 440 transitions, 6641 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-14 13:40:15,217 INFO L231 Difference]: Finished difference. Result has 310 places, 414 transitions, 5775 flow [2024-06-14 13:40:15,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5775, PETRI_PLACES=310, PETRI_TRANSITIONS=414} [2024-06-14 13:40:15,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 13:40:15,218 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 414 transitions, 5775 flow [2024-06-14 13:40:15,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:15,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:15,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:40:15,218 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:15,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1115977056, now seen corresponding path program 2 times [2024-06-14 13:40:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:15,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084893864] [2024-06-14 13:40:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:16,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084893864] [2024-06-14 13:40:16,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084893864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:16,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:16,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142115192] [2024-06-14 13:40:16,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:16,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:16,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:16,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:16,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 414 transitions, 5775 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:16,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:16,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:16,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:17,772 INFO L124 PetriNetUnfolderBase]: 3586/5689 cut-off events. [2024-06-14 13:40:17,772 INFO L125 PetriNetUnfolderBase]: For 757357/757360 co-relation queries the response was YES. [2024-06-14 13:40:17,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50502 conditions, 5689 events. 3586/5689 cut-off events. For 757357/757360 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34429 event pairs, 772 based on Foata normal form. 2/5687 useless extension candidates. Maximal degree in co-relation 50353. Up to 5269 conditions per place. [2024-06-14 13:40:17,851 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 391 selfloop transitions, 46 changer transitions 0/442 dead transitions. [2024-06-14 13:40:17,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 442 transitions, 6792 flow [2024-06-14 13:40:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:40:17,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:40:17,852 INFO L175 Difference]: Start difference. First operand has 310 places, 414 transitions, 5775 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:40:17,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 442 transitions, 6792 flow [2024-06-14 13:40:19,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 442 transitions, 6688 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:19,887 INFO L231 Difference]: Finished difference. Result has 312 places, 417 transitions, 5837 flow [2024-06-14 13:40:19,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5837, PETRI_PLACES=312, PETRI_TRANSITIONS=417} [2024-06-14 13:40:19,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 13:40:19,887 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 417 transitions, 5837 flow [2024-06-14 13:40:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:19,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:19,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:19,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:40:19,888 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:19,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1369407802, now seen corresponding path program 3 times [2024-06-14 13:40:19,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10400251] [2024-06-14 13:40:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:21,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10400251] [2024-06-14 13:40:21,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10400251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:21,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:21,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68930502] [2024-06-14 13:40:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:21,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:21,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 417 transitions, 5837 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:21,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:21,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:21,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:22,522 INFO L124 PetriNetUnfolderBase]: 3628/5753 cut-off events. [2024-06-14 13:40:22,522 INFO L125 PetriNetUnfolderBase]: For 791610/791613 co-relation queries the response was YES. [2024-06-14 13:40:22,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51558 conditions, 5753 events. 3628/5753 cut-off events. For 791610/791613 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 34911 event pairs, 768 based on Foata normal form. 2/5751 useless extension candidates. Maximal degree in co-relation 51408. Up to 5272 conditions per place. [2024-06-14 13:40:22,606 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 381 selfloop transitions, 63 changer transitions 0/449 dead transitions. [2024-06-14 13:40:22,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 449 transitions, 7183 flow [2024-06-14 13:40:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:40:22,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:40:22,607 INFO L175 Difference]: Start difference. First operand has 312 places, 417 transitions, 5837 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:40:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 449 transitions, 7183 flow [2024-06-14 13:40:24,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 449 transitions, 7064 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:24,495 INFO L231 Difference]: Finished difference. Result has 315 places, 426 transitions, 6096 flow [2024-06-14 13:40:24,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6096, PETRI_PLACES=315, PETRI_TRANSITIONS=426} [2024-06-14 13:40:24,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 13:40:24,495 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 426 transitions, 6096 flow [2024-06-14 13:40:24,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:24,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:24,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:24,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:40:24,496 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:24,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2047713182, now seen corresponding path program 7 times [2024-06-14 13:40:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:24,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190934882] [2024-06-14 13:40:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:24,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:25,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:25,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190934882] [2024-06-14 13:40:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190934882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:25,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:25,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:25,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278373798] [2024-06-14 13:40:25,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 426 transitions, 6096 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:25,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:26,723 INFO L124 PetriNetUnfolderBase]: 3638/5777 cut-off events. [2024-06-14 13:40:26,724 INFO L125 PetriNetUnfolderBase]: For 809538/809538 co-relation queries the response was YES. [2024-06-14 13:40:26,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52116 conditions, 5777 events. 3638/5777 cut-off events. For 809538/809538 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35154 event pairs, 885 based on Foata normal form. 2/5760 useless extension candidates. Maximal degree in co-relation 51964. Up to 5342 conditions per place. [2024-06-14 13:40:26,811 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 399 selfloop transitions, 49 changer transitions 0/453 dead transitions. [2024-06-14 13:40:26,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 453 transitions, 7202 flow [2024-06-14 13:40:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:40:26,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:40:26,812 INFO L175 Difference]: Start difference. First operand has 315 places, 426 transitions, 6096 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:40:26,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 453 transitions, 7202 flow [2024-06-14 13:40:29,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 453 transitions, 7080 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:29,345 INFO L231 Difference]: Finished difference. Result has 319 places, 432 transitions, 6222 flow [2024-06-14 13:40:29,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6222, PETRI_PLACES=319, PETRI_TRANSITIONS=432} [2024-06-14 13:40:29,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-14 13:40:29,346 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 432 transitions, 6222 flow [2024-06-14 13:40:29,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:29,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:29,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:40:29,347 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:29,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1867491042, now seen corresponding path program 8 times [2024-06-14 13:40:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:29,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494638447] [2024-06-14 13:40:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494638447] [2024-06-14 13:40:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494638447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:30,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:30,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:30,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034044912] [2024-06-14 13:40:30,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:30,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:30,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:30,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 432 transitions, 6222 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:30,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:30,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:30,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:31,750 INFO L124 PetriNetUnfolderBase]: 3640/5778 cut-off events. [2024-06-14 13:40:31,750 INFO L125 PetriNetUnfolderBase]: For 822443/822443 co-relation queries the response was YES. [2024-06-14 13:40:31,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52417 conditions, 5778 events. 3640/5778 cut-off events. For 822443/822443 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35147 event pairs, 893 based on Foata normal form. 2/5758 useless extension candidates. Maximal degree in co-relation 52263. Up to 5337 conditions per place. [2024-06-14 13:40:31,824 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 51 changer transitions 0/454 dead transitions. [2024-06-14 13:40:31,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 454 transitions, 7307 flow [2024-06-14 13:40:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:40:31,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:40:31,826 INFO L175 Difference]: Start difference. First operand has 319 places, 432 transitions, 6222 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:40:31,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 454 transitions, 7307 flow [2024-06-14 13:40:34,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 454 transitions, 7163 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:34,019 INFO L231 Difference]: Finished difference. Result has 323 places, 435 transitions, 6301 flow [2024-06-14 13:40:34,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6301, PETRI_PLACES=323, PETRI_TRANSITIONS=435} [2024-06-14 13:40:34,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-14 13:40:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 435 transitions, 6301 flow [2024-06-14 13:40:34,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:34,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:34,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:34,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:40:34,020 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:34,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 540764894, now seen corresponding path program 9 times [2024-06-14 13:40:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859971369] [2024-06-14 13:40:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:34,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859971369] [2024-06-14 13:40:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859971369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:34,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:34,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720164266] [2024-06-14 13:40:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:34,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:34,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:34,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:34,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 435 transitions, 6301 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:34,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:34,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:34,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:36,584 INFO L124 PetriNetUnfolderBase]: 3676/5838 cut-off events. [2024-06-14 13:40:36,584 INFO L125 PetriNetUnfolderBase]: For 859054/859054 co-relation queries the response was YES. [2024-06-14 13:40:36,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53276 conditions, 5838 events. 3676/5838 cut-off events. For 859054/859054 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35610 event pairs, 873 based on Foata normal form. 4/5823 useless extension candidates. Maximal degree in co-relation 53120. Up to 5258 conditions per place. [2024-06-14 13:40:36,670 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 383 selfloop transitions, 72 changer transitions 0/460 dead transitions. [2024-06-14 13:40:36,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 460 transitions, 7677 flow [2024-06-14 13:40:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:40:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:40:36,671 INFO L175 Difference]: Start difference. First operand has 323 places, 435 transitions, 6301 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:40:36,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 460 transitions, 7677 flow [2024-06-14 13:40:38,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 460 transitions, 7495 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:38,717 INFO L231 Difference]: Finished difference. Result has 327 places, 442 transitions, 6508 flow [2024-06-14 13:40:38,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6508, PETRI_PLACES=327, PETRI_TRANSITIONS=442} [2024-06-14 13:40:38,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 13:40:38,718 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 442 transitions, 6508 flow [2024-06-14 13:40:38,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:38,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:38,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:40:38,718 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:38,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:38,718 INFO L85 PathProgramCache]: Analyzing trace with hash 153971422, now seen corresponding path program 10 times [2024-06-14 13:40:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084742131] [2024-06-14 13:40:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084742131] [2024-06-14 13:40:39,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084742131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:39,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:39,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:39,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609299287] [2024-06-14 13:40:39,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:39,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:39,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:39,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 442 transitions, 6508 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:39,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:39,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:39,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:41,126 INFO L124 PetriNetUnfolderBase]: 3770/5970 cut-off events. [2024-06-14 13:40:41,126 INFO L125 PetriNetUnfolderBase]: For 931206/931209 co-relation queries the response was YES. [2024-06-14 13:40:41,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55910 conditions, 5970 events. 3770/5970 cut-off events. For 931206/931209 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36497 event pairs, 874 based on Foata normal form. 6/5958 useless extension candidates. Maximal degree in co-relation 55752. Up to 4819 conditions per place. [2024-06-14 13:40:41,219 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 312 selfloop transitions, 164 changer transitions 0/481 dead transitions. [2024-06-14 13:40:41,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 481 transitions, 8758 flow [2024-06-14 13:40:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:40:41,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:40:41,220 INFO L175 Difference]: Start difference. First operand has 327 places, 442 transitions, 6508 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:40:41,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 481 transitions, 8758 flow [2024-06-14 13:40:43,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 481 transitions, 8543 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:43,415 INFO L231 Difference]: Finished difference. Result has 332 places, 463 transitions, 7327 flow [2024-06-14 13:40:43,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7327, PETRI_PLACES=332, PETRI_TRANSITIONS=463} [2024-06-14 13:40:43,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 13:40:43,416 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 463 transitions, 7327 flow [2024-06-14 13:40:43,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:43,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:43,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:43,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:40:43,416 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:43,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash 149209822, now seen corresponding path program 11 times [2024-06-14 13:40:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:43,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977904526] [2024-06-14 13:40:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:43,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977904526] [2024-06-14 13:40:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977904526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:44,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:44,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726585830] [2024-06-14 13:40:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:44,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:44,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 463 transitions, 7327 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:44,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:44,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:44,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:45,857 INFO L124 PetriNetUnfolderBase]: 3784/5982 cut-off events. [2024-06-14 13:40:45,857 INFO L125 PetriNetUnfolderBase]: For 945611/945611 co-relation queries the response was YES. [2024-06-14 13:40:45,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56728 conditions, 5982 events. 3784/5982 cut-off events. For 945611/945611 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36422 event pairs, 876 based on Foata normal form. 6/5973 useless extension candidates. Maximal degree in co-relation 56568. Up to 5595 conditions per place. [2024-06-14 13:40:45,948 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 423 selfloop transitions, 56 changer transitions 0/484 dead transitions. [2024-06-14 13:40:45,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 484 transitions, 8726 flow [2024-06-14 13:40:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:40:45,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:40:45,949 INFO L175 Difference]: Start difference. First operand has 332 places, 463 transitions, 7327 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:40:45,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 484 transitions, 8726 flow [2024-06-14 13:40:48,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 484 transitions, 8402 flow, removed 145 selfloop flow, removed 2 redundant places. [2024-06-14 13:40:48,243 INFO L231 Difference]: Finished difference. Result has 340 places, 469 transitions, 7333 flow [2024-06-14 13:40:48,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7333, PETRI_PLACES=340, PETRI_TRANSITIONS=469} [2024-06-14 13:40:48,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 13:40:48,244 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 469 transitions, 7333 flow [2024-06-14 13:40:48,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:48,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:48,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:48,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:40:48,244 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:48,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1200175360, now seen corresponding path program 12 times [2024-06-14 13:40:48,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:48,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851534593] [2024-06-14 13:40:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:49,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:49,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851534593] [2024-06-14 13:40:49,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851534593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:49,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:49,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:49,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667634800] [2024-06-14 13:40:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:49,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 469 transitions, 7333 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:49,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:50,586 INFO L124 PetriNetUnfolderBase]: 3806/6022 cut-off events. [2024-06-14 13:40:50,587 INFO L125 PetriNetUnfolderBase]: For 957513/957516 co-relation queries the response was YES. [2024-06-14 13:40:50,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56893 conditions, 6022 events. 3806/6022 cut-off events. For 957513/957516 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36870 event pairs, 882 based on Foata normal form. 6/6010 useless extension candidates. Maximal degree in co-relation 56730. Up to 4860 conditions per place. [2024-06-14 13:40:50,681 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 313 selfloop transitions, 178 changer transitions 0/496 dead transitions. [2024-06-14 13:40:50,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 496 transitions, 9091 flow [2024-06-14 13:40:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:40:50,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:40:50,682 INFO L175 Difference]: Start difference. First operand has 340 places, 469 transitions, 7333 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:40:50,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 496 transitions, 9091 flow [2024-06-14 13:40:52,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 496 transitions, 8788 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:52,949 INFO L231 Difference]: Finished difference. Result has 343 places, 479 transitions, 7770 flow [2024-06-14 13:40:52,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7030, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7770, PETRI_PLACES=343, PETRI_TRANSITIONS=479} [2024-06-14 13:40:52,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 13:40:52,949 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 479 transitions, 7770 flow [2024-06-14 13:40:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:52,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:52,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:52,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:40:52,950 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:52,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1920521662, now seen corresponding path program 2 times [2024-06-14 13:40:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:52,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042102753] [2024-06-14 13:40:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:52,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:53,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042102753] [2024-06-14 13:40:53,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042102753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:53,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:53,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039526175] [2024-06-14 13:40:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:54,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:54,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 479 transitions, 7770 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:54,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:54,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:54,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:55,506 INFO L124 PetriNetUnfolderBase]: 3811/6037 cut-off events. [2024-06-14 13:40:55,506 INFO L125 PetriNetUnfolderBase]: For 948940/948940 co-relation queries the response was YES. [2024-06-14 13:40:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57467 conditions, 6037 events. 3811/6037 cut-off events. For 948940/948940 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36939 event pairs, 882 based on Foata normal form. 1/6029 useless extension candidates. Maximal degree in co-relation 57303. Up to 5674 conditions per place. [2024-06-14 13:40:55,601 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 50 changer transitions 0/498 dead transitions. [2024-06-14 13:40:55,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 498 transitions, 9148 flow [2024-06-14 13:40:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:40:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:40:55,602 INFO L175 Difference]: Start difference. First operand has 343 places, 479 transitions, 7770 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:40:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 498 transitions, 9148 flow [2024-06-14 13:40:58,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 498 transitions, 8796 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-14 13:40:58,241 INFO L231 Difference]: Finished difference. Result has 349 places, 486 transitions, 7709 flow [2024-06-14 13:40:58,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7709, PETRI_PLACES=349, PETRI_TRANSITIONS=486} [2024-06-14 13:40:58,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:40:58,242 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 486 transitions, 7709 flow [2024-06-14 13:40:58,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:58,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:58,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:58,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:40:58,242 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:58,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1435226272, now seen corresponding path program 3 times [2024-06-14 13:40:58,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:58,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979889545] [2024-06-14 13:40:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:59,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:59,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979889545] [2024-06-14 13:40:59,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979889545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:59,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:59,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099001047] [2024-06-14 13:40:59,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:59,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:59,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:59,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:40:59,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 486 transitions, 7709 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:59,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:59,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:40:59,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:00,830 INFO L124 PetriNetUnfolderBase]: 3854/6105 cut-off events. [2024-06-14 13:41:00,830 INFO L125 PetriNetUnfolderBase]: For 990144/990147 co-relation queries the response was YES. [2024-06-14 13:41:00,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57932 conditions, 6105 events. 3854/6105 cut-off events. For 990144/990147 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37465 event pairs, 889 based on Foata normal form. 3/6090 useless extension candidates. Maximal degree in co-relation 57766. Up to 5122 conditions per place. [2024-06-14 13:41:00,925 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 354 selfloop transitions, 154 changer transitions 0/513 dead transitions. [2024-06-14 13:41:00,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 513 transitions, 9664 flow [2024-06-14 13:41:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:41:00,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:41:00,927 INFO L175 Difference]: Start difference. First operand has 349 places, 486 transitions, 7709 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:41:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 513 transitions, 9664 flow [2024-06-14 13:41:03,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 513 transitions, 9535 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 13:41:03,450 INFO L231 Difference]: Finished difference. Result has 354 places, 495 transitions, 8189 flow [2024-06-14 13:41:03,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8189, PETRI_PLACES=354, PETRI_TRANSITIONS=495} [2024-06-14 13:41:03,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 13:41:03,451 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 495 transitions, 8189 flow [2024-06-14 13:41:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:03,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:03,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:41:03,451 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:03,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1534968232, now seen corresponding path program 4 times [2024-06-14 13:41:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368671919] [2024-06-14 13:41:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:04,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:04,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368671919] [2024-06-14 13:41:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368671919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:04,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:04,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:04,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342625920] [2024-06-14 13:41:04,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:04,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:04,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:04,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 495 transitions, 8189 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:04,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:04,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:04,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:06,123 INFO L124 PetriNetUnfolderBase]: 3864/6121 cut-off events. [2024-06-14 13:41:06,123 INFO L125 PetriNetUnfolderBase]: For 1007006/1007006 co-relation queries the response was YES. [2024-06-14 13:41:06,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58809 conditions, 6121 events. 3864/6121 cut-off events. For 1007006/1007006 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37578 event pairs, 796 based on Foata normal form. 2/6114 useless extension candidates. Maximal degree in co-relation 58640. Up to 5673 conditions per place. [2024-06-14 13:41:06,224 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 479 selfloop transitions, 38 changer transitions 0/522 dead transitions. [2024-06-14 13:41:06,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 522 transitions, 9374 flow [2024-06-14 13:41:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:41:06,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:41:06,226 INFO L175 Difference]: Start difference. First operand has 354 places, 495 transitions, 8189 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:41:06,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 522 transitions, 9374 flow [2024-06-14 13:41:08,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 522 transitions, 9005 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 13:41:08,520 INFO L231 Difference]: Finished difference. Result has 358 places, 498 transitions, 7981 flow [2024-06-14 13:41:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7820, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7981, PETRI_PLACES=358, PETRI_TRANSITIONS=498} [2024-06-14 13:41:08,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 13:41:08,520 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 498 transitions, 7981 flow [2024-06-14 13:41:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:08,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:08,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:08,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:41:08,520 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:08,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -852098520, now seen corresponding path program 5 times [2024-06-14 13:41:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:08,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489554621] [2024-06-14 13:41:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:09,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489554621] [2024-06-14 13:41:09,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489554621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:09,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:09,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046771841] [2024-06-14 13:41:09,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:09,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:09,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:09,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:09,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 498 transitions, 7981 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:09,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:09,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:11,287 INFO L124 PetriNetUnfolderBase]: 3858/6102 cut-off events. [2024-06-14 13:41:11,287 INFO L125 PetriNetUnfolderBase]: For 1011024/1011024 co-relation queries the response was YES. [2024-06-14 13:41:11,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58523 conditions, 6102 events. 3858/6102 cut-off events. For 1011024/1011024 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 37377 event pairs, 791 based on Foata normal form. 2/6095 useless extension candidates. Maximal degree in co-relation 58352. Up to 5637 conditions per place. [2024-06-14 13:41:11,389 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 467 selfloop transitions, 49 changer transitions 0/521 dead transitions. [2024-06-14 13:41:11,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 521 transitions, 9297 flow [2024-06-14 13:41:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:41:11,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:41:11,390 INFO L175 Difference]: Start difference. First operand has 358 places, 498 transitions, 7981 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:41:11,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 521 transitions, 9297 flow [2024-06-14 13:41:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 521 transitions, 9187 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:14,083 INFO L231 Difference]: Finished difference. Result has 360 places, 498 transitions, 7976 flow [2024-06-14 13:41:14,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7871, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7976, PETRI_PLACES=360, PETRI_TRANSITIONS=498} [2024-06-14 13:41:14,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-14 13:41:14,084 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 498 transitions, 7976 flow [2024-06-14 13:41:14,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:14,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:14,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:41:14,084 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:14,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 255079934, now seen corresponding path program 6 times [2024-06-14 13:41:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:14,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654387155] [2024-06-14 13:41:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:14,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654387155] [2024-06-14 13:41:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654387155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:15,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120529977] [2024-06-14 13:41:15,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:15,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:15,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:15,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:15,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:15,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:15,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 498 transitions, 7976 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:15,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:15,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:15,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:16,712 INFO L124 PetriNetUnfolderBase]: 3852/6101 cut-off events. [2024-06-14 13:41:16,712 INFO L125 PetriNetUnfolderBase]: For 1018418/1018418 co-relation queries the response was YES. [2024-06-14 13:41:16,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58407 conditions, 6101 events. 3852/6101 cut-off events. For 1018418/1018418 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37416 event pairs, 793 based on Foata normal form. 2/6094 useless extension candidates. Maximal degree in co-relation 58235. Up to 5657 conditions per place. [2024-06-14 13:41:16,821 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 478 selfloop transitions, 38 changer transitions 0/521 dead transitions. [2024-06-14 13:41:16,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 521 transitions, 9084 flow [2024-06-14 13:41:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:41:16,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:41:16,822 INFO L175 Difference]: Start difference. First operand has 360 places, 498 transitions, 7976 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:41:16,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 521 transitions, 9084 flow [2024-06-14 13:41:19,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 521 transitions, 8894 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:19,830 INFO L231 Difference]: Finished difference. Result has 362 places, 498 transitions, 7868 flow [2024-06-14 13:41:19,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7868, PETRI_PLACES=362, PETRI_TRANSITIONS=498} [2024-06-14 13:41:19,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 13:41:19,830 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 498 transitions, 7868 flow [2024-06-14 13:41:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:19,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:19,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:19,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:41:19,831 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:19,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash 268412414, now seen corresponding path program 7 times [2024-06-14 13:41:19,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186277692] [2024-06-14 13:41:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:20,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:20,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186277692] [2024-06-14 13:41:20,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186277692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:20,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450506542] [2024-06-14 13:41:20,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:20,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 498 transitions, 7868 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:20,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:20,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:20,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:22,630 INFO L124 PetriNetUnfolderBase]: 3836/6072 cut-off events. [2024-06-14 13:41:22,631 INFO L125 PetriNetUnfolderBase]: For 1024469/1024469 co-relation queries the response was YES. [2024-06-14 13:41:22,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57843 conditions, 6072 events. 3836/6072 cut-off events. For 1024469/1024469 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37206 event pairs, 798 based on Foata normal form. 4/6067 useless extension candidates. Maximal degree in co-relation 57670. Up to 5567 conditions per place. [2024-06-14 13:41:22,723 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 50 changer transitions 0/518 dead transitions. [2024-06-14 13:41:22,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 518 transitions, 8958 flow [2024-06-14 13:41:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:41:22,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:41:22,725 INFO L175 Difference]: Start difference. First operand has 362 places, 498 transitions, 7868 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:41:22,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 518 transitions, 8958 flow [2024-06-14 13:41:26,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 518 transitions, 8834 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:26,057 INFO L231 Difference]: Finished difference. Result has 363 places, 498 transitions, 7852 flow [2024-06-14 13:41:26,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7852, PETRI_PLACES=363, PETRI_TRANSITIONS=498} [2024-06-14 13:41:26,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 13:41:26,058 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 498 transitions, 7852 flow [2024-06-14 13:41:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:26,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:26,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:26,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:41:26,058 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:26,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash 383406914, now seen corresponding path program 8 times [2024-06-14 13:41:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:26,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768139508] [2024-06-14 13:41:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:27,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:27,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768139508] [2024-06-14 13:41:27,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768139508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:27,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683537929] [2024-06-14 13:41:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:27,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:27,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:27,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 498 transitions, 7852 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:27,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:27,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:27,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:28,893 INFO L124 PetriNetUnfolderBase]: 3856/6108 cut-off events. [2024-06-14 13:41:28,894 INFO L125 PetriNetUnfolderBase]: For 1043274/1043274 co-relation queries the response was YES. [2024-06-14 13:41:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58239 conditions, 6108 events. 3856/6108 cut-off events. For 1043274/1043274 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37482 event pairs, 772 based on Foata normal form. 4/6103 useless extension candidates. Maximal degree in co-relation 58065. Up to 5399 conditions per place. [2024-06-14 13:41:28,988 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 89 changer transitions 0/523 dead transitions. [2024-06-14 13:41:28,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 523 transitions, 9259 flow [2024-06-14 13:41:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:41:28,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:41:28,989 INFO L175 Difference]: Start difference. First operand has 363 places, 498 transitions, 7852 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:41:28,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 523 transitions, 9259 flow [2024-06-14 13:41:31,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 523 transitions, 9129 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:31,896 INFO L231 Difference]: Finished difference. Result has 364 places, 502 transitions, 7991 flow [2024-06-14 13:41:31,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7722, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7991, PETRI_PLACES=364, PETRI_TRANSITIONS=502} [2024-06-14 13:41:31,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 13:41:31,897 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 502 transitions, 7991 flow [2024-06-14 13:41:31,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:31,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:31,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:31,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:41:31,897 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:31,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash 383703584, now seen corresponding path program 9 times [2024-06-14 13:41:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15263823] [2024-06-14 13:41:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:33,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:33,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15263823] [2024-06-14 13:41:33,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15263823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:33,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:33,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488782479] [2024-06-14 13:41:33,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:33,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:33,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:33,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 502 transitions, 7991 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:33,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:33,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:33,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:34,877 INFO L124 PetriNetUnfolderBase]: 3840/6089 cut-off events. [2024-06-14 13:41:34,877 INFO L125 PetriNetUnfolderBase]: For 1039546/1039546 co-relation queries the response was YES. [2024-06-14 13:41:34,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57955 conditions, 6089 events. 3840/6089 cut-off events. For 1039546/1039546 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37409 event pairs, 775 based on Foata normal form. 4/6084 useless extension candidates. Maximal degree in co-relation 57780. Up to 5386 conditions per place. [2024-06-14 13:41:34,986 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 87 changer transitions 0/521 dead transitions. [2024-06-14 13:41:34,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 521 transitions, 9087 flow [2024-06-14 13:41:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:41:34,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:41:34,988 INFO L175 Difference]: Start difference. First operand has 364 places, 502 transitions, 7991 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:41:34,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 521 transitions, 9087 flow [2024-06-14 13:41:38,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 521 transitions, 8749 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:38,374 INFO L231 Difference]: Finished difference. Result has 365 places, 502 transitions, 7836 flow [2024-06-14 13:41:38,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7836, PETRI_PLACES=365, PETRI_TRANSITIONS=502} [2024-06-14 13:41:38,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 13:41:38,375 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 502 transitions, 7836 flow [2024-06-14 13:41:38,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:38,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:38,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:41:38,375 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:38,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash 556015902, now seen corresponding path program 1 times [2024-06-14 13:41:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:38,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263800218] [2024-06-14 13:41:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:39,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263800218] [2024-06-14 13:41:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263800218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:39,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377497320] [2024-06-14 13:41:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:39,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:39,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 502 transitions, 7836 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:39,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:39,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:39,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:40,802 INFO L124 PetriNetUnfolderBase]: 3860/6121 cut-off events. [2024-06-14 13:41:40,802 INFO L125 PetriNetUnfolderBase]: For 1056299/1056299 co-relation queries the response was YES. [2024-06-14 13:41:40,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58102 conditions, 6121 events. 3860/6121 cut-off events. For 1056299/1056299 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37651 event pairs, 868 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 57927. Up to 5664 conditions per place. [2024-06-14 13:41:40,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 472 selfloop transitions, 50 changer transitions 0/527 dead transitions. [2024-06-14 13:41:40,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 527 transitions, 9110 flow [2024-06-14 13:41:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:41:40,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:41:40,902 INFO L175 Difference]: Start difference. First operand has 365 places, 502 transitions, 7836 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:41:40,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 527 transitions, 9110 flow [2024-06-14 13:41:43,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 527 transitions, 8888 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:41:43,698 INFO L231 Difference]: Finished difference. Result has 366 places, 508 transitions, 7878 flow [2024-06-14 13:41:43,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7878, PETRI_PLACES=366, PETRI_TRANSITIONS=508} [2024-06-14 13:41:43,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 13:41:43,699 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 508 transitions, 7878 flow [2024-06-14 13:41:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:43,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:43,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:43,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:41:43,699 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:43,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2014945632, now seen corresponding path program 2 times [2024-06-14 13:41:43,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:43,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2417602] [2024-06-14 13:41:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:44,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2417602] [2024-06-14 13:41:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2417602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:44,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:44,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:44,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350149425] [2024-06-14 13:41:44,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:44,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:44,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:44,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 508 transitions, 7878 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:44,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:44,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:44,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:46,217 INFO L124 PetriNetUnfolderBase]: 3890/6161 cut-off events. [2024-06-14 13:41:46,217 INFO L125 PetriNetUnfolderBase]: For 1074374/1074377 co-relation queries the response was YES. [2024-06-14 13:41:46,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58594 conditions, 6161 events. 3890/6161 cut-off events. For 1074374/1074377 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37887 event pairs, 848 based on Foata normal form. 4/6154 useless extension candidates. Maximal degree in co-relation 58418. Up to 5457 conditions per place. [2024-06-14 13:41:46,319 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 416 selfloop transitions, 119 changer transitions 0/540 dead transitions. [2024-06-14 13:41:46,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 540 transitions, 9783 flow [2024-06-14 13:41:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:41:46,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:41:46,321 INFO L175 Difference]: Start difference. First operand has 366 places, 508 transitions, 7878 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:41:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 540 transitions, 9783 flow [2024-06-14 13:41:49,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 540 transitions, 9631 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:49,997 INFO L231 Difference]: Finished difference. Result has 369 places, 521 transitions, 8300 flow [2024-06-14 13:41:49,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8300, PETRI_PLACES=369, PETRI_TRANSITIONS=521} [2024-06-14 13:41:49,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-14 13:41:49,998 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 521 transitions, 8300 flow [2024-06-14 13:41:49,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:49,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:49,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:49,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:41:49,998 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:49,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2029468946, now seen corresponding path program 10 times [2024-06-14 13:41:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:49,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221340557] [2024-06-14 13:41:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:51,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221340557] [2024-06-14 13:41:51,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221340557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:51,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:51,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:51,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217918264] [2024-06-14 13:41:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:51,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:51,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 521 transitions, 8300 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:51,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:51,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:51,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:52,803 INFO L124 PetriNetUnfolderBase]: 3942/6245 cut-off events. [2024-06-14 13:41:52,803 INFO L125 PetriNetUnfolderBase]: For 1120132/1120135 co-relation queries the response was YES. [2024-06-14 13:41:52,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60021 conditions, 6245 events. 3942/6245 cut-off events. For 1120132/1120135 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 38556 event pairs, 807 based on Foata normal form. 4/6238 useless extension candidates. Maximal degree in co-relation 59843. Up to 5292 conditions per place. [2024-06-14 13:41:52,896 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 121 changer transitions 0/551 dead transitions. [2024-06-14 13:41:52,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 551 transitions, 10067 flow [2024-06-14 13:41:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:41:52,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:41:52,897 INFO L175 Difference]: Start difference. First operand has 369 places, 521 transitions, 8300 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:41:52,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 551 transitions, 10067 flow [2024-06-14 13:41:56,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 551 transitions, 9832 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 13:41:56,281 INFO L231 Difference]: Finished difference. Result has 373 places, 530 transitions, 8512 flow [2024-06-14 13:41:56,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8065, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=373, PETRI_TRANSITIONS=530} [2024-06-14 13:41:56,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 13:41:56,281 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 530 transitions, 8512 flow [2024-06-14 13:41:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:56,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:56,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:56,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:41:56,281 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:41:56,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2029460576, now seen corresponding path program 11 times [2024-06-14 13:41:56,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:56,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147414849] [2024-06-14 13:41:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:56,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:57,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147414849] [2024-06-14 13:41:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147414849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:57,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:57,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:57,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501439003] [2024-06-14 13:41:57,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:57,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:57,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:57,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:57,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:41:57,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 530 transitions, 8512 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:57,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:57,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:41:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:59,238 INFO L124 PetriNetUnfolderBase]: 3956/6270 cut-off events. [2024-06-14 13:41:59,238 INFO L125 PetriNetUnfolderBase]: For 1143792/1143795 co-relation queries the response was YES. [2024-06-14 13:41:59,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60347 conditions, 6270 events. 3956/6270 cut-off events. For 1143792/1143795 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38744 event pairs, 802 based on Foata normal form. 6/6265 useless extension candidates. Maximal degree in co-relation 60167. Up to 5004 conditions per place. [2024-06-14 13:41:59,336 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 385 selfloop transitions, 165 changer transitions 0/555 dead transitions. [2024-06-14 13:41:59,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 555 transitions, 10238 flow [2024-06-14 13:41:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:41:59,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:41:59,337 INFO L175 Difference]: Start difference. First operand has 373 places, 530 transitions, 8512 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:41:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 555 transitions, 10238 flow [2024-06-14 13:42:03,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 555 transitions, 10030 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 13:42:03,511 INFO L231 Difference]: Finished difference. Result has 378 places, 536 transitions, 8764 flow [2024-06-14 13:42:03,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8764, PETRI_PLACES=378, PETRI_TRANSITIONS=536} [2024-06-14 13:42:03,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 13:42:03,511 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 536 transitions, 8764 flow [2024-06-14 13:42:03,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:03,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:03,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:42:03,512 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:03,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1434934562, now seen corresponding path program 3 times [2024-06-14 13:42:03,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:03,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202470388] [2024-06-14 13:42:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:03,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202470388] [2024-06-14 13:42:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202470388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:42:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786675013] [2024-06-14 13:42:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:42:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:42:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:42:04,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:04,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 536 transitions, 8764 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:04,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:04,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:04,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:05,966 INFO L124 PetriNetUnfolderBase]: 3948/6257 cut-off events. [2024-06-14 13:42:05,966 INFO L125 PetriNetUnfolderBase]: For 1122936/1122939 co-relation queries the response was YES. [2024-06-14 13:42:06,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60247 conditions, 6257 events. 3948/6257 cut-off events. For 1122936/1122939 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38658 event pairs, 860 based on Foata normal form. 2/6248 useless extension candidates. Maximal degree in co-relation 60066. Up to 5679 conditions per place. [2024-06-14 13:42:06,059 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 466 selfloop transitions, 80 changer transitions 0/551 dead transitions. [2024-06-14 13:42:06,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 551 transitions, 9930 flow [2024-06-14 13:42:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:42:06,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:42:06,060 INFO L175 Difference]: Start difference. First operand has 378 places, 536 transitions, 8764 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:42:06,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 551 transitions, 9930 flow [2024-06-14 13:42:09,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 551 transitions, 9659 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 13:42:09,548 INFO L231 Difference]: Finished difference. Result has 382 places, 536 transitions, 8659 flow [2024-06-14 13:42:09,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8493, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8659, PETRI_PLACES=382, PETRI_TRANSITIONS=536} [2024-06-14 13:42:09,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-14 13:42:09,548 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 536 transitions, 8659 flow [2024-06-14 13:42:09,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:09,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:09,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:42:09,549 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:09,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:09,549 INFO L85 PathProgramCache]: Analyzing trace with hash 153978366, now seen corresponding path program 12 times [2024-06-14 13:42:09,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:09,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704835938] [2024-06-14 13:42:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:09,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704835938] [2024-06-14 13:42:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704835938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:10,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:10,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:42:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406562398] [2024-06-14 13:42:10,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:10,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:42:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:42:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:42:10,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:10,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 536 transitions, 8659 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:10,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:10,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:10,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:12,400 INFO L124 PetriNetUnfolderBase]: 3942/6245 cut-off events. [2024-06-14 13:42:12,400 INFO L125 PetriNetUnfolderBase]: For 1142451/1142454 co-relation queries the response was YES. [2024-06-14 13:42:12,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59453 conditions, 6245 events. 3942/6245 cut-off events. For 1142451/1142454 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38475 event pairs, 786 based on Foata normal form. 6/6240 useless extension candidates. Maximal degree in co-relation 59271. Up to 4998 conditions per place. [2024-06-14 13:42:12,503 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 375 selfloop transitions, 179 changer transitions 0/559 dead transitions. [2024-06-14 13:42:12,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 559 transitions, 10344 flow [2024-06-14 13:42:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:42:12,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:42:12,504 INFO L175 Difference]: Start difference. First operand has 382 places, 536 transitions, 8659 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:42:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 559 transitions, 10344 flow [2024-06-14 13:42:16,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 559 transitions, 10126 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:42:16,824 INFO L231 Difference]: Finished difference. Result has 385 places, 539 transitions, 8859 flow [2024-06-14 13:42:16,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8441, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8859, PETRI_PLACES=385, PETRI_TRANSITIONS=539} [2024-06-14 13:42:16,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 13:42:16,825 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 539 transitions, 8859 flow [2024-06-14 13:42:16,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:16,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:16,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:42:16,825 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:16,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1894012990, now seen corresponding path program 1 times [2024-06-14 13:42:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860000668] [2024-06-14 13:42:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:18,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:18,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860000668] [2024-06-14 13:42:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860000668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:18,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:18,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:18,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850288711] [2024-06-14 13:42:18,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:18,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:18,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:18,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:18,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 539 transitions, 8859 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:18,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:18,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:18,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:19,873 INFO L124 PetriNetUnfolderBase]: 3950/6260 cut-off events. [2024-06-14 13:42:19,873 INFO L125 PetriNetUnfolderBase]: For 1136452/1136452 co-relation queries the response was YES. [2024-06-14 13:42:19,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60187 conditions, 6260 events. 3950/6260 cut-off events. For 1136452/1136452 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38616 event pairs, 816 based on Foata normal form. 2/6259 useless extension candidates. Maximal degree in co-relation 60004. Up to 5903 conditions per place. [2024-06-14 13:42:19,960 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 542 selfloop transitions, 17 changer transitions 0/564 dead transitions. [2024-06-14 13:42:19,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 564 transitions, 10137 flow [2024-06-14 13:42:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:42:19,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:42:19,961 INFO L175 Difference]: Start difference. First operand has 385 places, 539 transitions, 8859 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:42:19,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 564 transitions, 10137 flow [2024-06-14 13:42:23,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 564 transitions, 9694 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:23,228 INFO L231 Difference]: Finished difference. Result has 387 places, 541 transitions, 8543 flow [2024-06-14 13:42:23,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8416, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8543, PETRI_PLACES=387, PETRI_TRANSITIONS=541} [2024-06-14 13:42:23,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-14 13:42:23,229 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 541 transitions, 8543 flow [2024-06-14 13:42:23,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:23,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:23,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:23,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:42:23,229 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:23,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash 268308006, now seen corresponding path program 2 times [2024-06-14 13:42:23,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:23,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566391314] [2024-06-14 13:42:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:24,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:24,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566391314] [2024-06-14 13:42:24,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566391314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:24,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:24,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:24,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891352443] [2024-06-14 13:42:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:24,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:24,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:24,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:24,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 541 transitions, 8543 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:24,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:24,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:24,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:26,470 INFO L124 PetriNetUnfolderBase]: 3958/6278 cut-off events. [2024-06-14 13:42:26,470 INFO L125 PetriNetUnfolderBase]: For 1152061/1152061 co-relation queries the response was YES. [2024-06-14 13:42:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59932 conditions, 6278 events. 3958/6278 cut-off events. For 1152061/1152061 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38791 event pairs, 850 based on Foata normal form. 2/6277 useless extension candidates. Maximal degree in co-relation 59748. Up to 5927 conditions per place. [2024-06-14 13:42:26,570 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 540 selfloop transitions, 18 changer transitions 0/563 dead transitions. [2024-06-14 13:42:26,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 563 transitions, 9811 flow [2024-06-14 13:42:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:42:26,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:42:26,571 INFO L175 Difference]: Start difference. First operand has 387 places, 541 transitions, 8543 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:42:26,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 563 transitions, 9811 flow [2024-06-14 13:42:30,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 563 transitions, 9700 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:30,585 INFO L231 Difference]: Finished difference. Result has 389 places, 543 transitions, 8565 flow [2024-06-14 13:42:30,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8432, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8565, PETRI_PLACES=389, PETRI_TRANSITIONS=543} [2024-06-14 13:42:30,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 13:42:30,586 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 543 transitions, 8565 flow [2024-06-14 13:42:30,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:30,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:30,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:30,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:42:30,586 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:30,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1196657700, now seen corresponding path program 1 times [2024-06-14 13:42:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:30,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382757024] [2024-06-14 13:42:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:31,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382757024] [2024-06-14 13:42:31,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382757024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:31,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:31,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:31,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81365926] [2024-06-14 13:42:31,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:31,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:31,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:31,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 543 transitions, 8565 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:31,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:31,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:31,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:33,559 INFO L124 PetriNetUnfolderBase]: 3978/6303 cut-off events. [2024-06-14 13:42:33,559 INFO L125 PetriNetUnfolderBase]: For 1187162/1187162 co-relation queries the response was YES. [2024-06-14 13:42:33,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60305 conditions, 6303 events. 3978/6303 cut-off events. For 1187162/1187162 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38922 event pairs, 811 based on Foata normal form. 4/6298 useless extension candidates. Maximal degree in co-relation 60120. Up to 5752 conditions per place. [2024-06-14 13:42:33,666 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 57 changer transitions 0/569 dead transitions. [2024-06-14 13:42:33,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 569 transitions, 9864 flow [2024-06-14 13:42:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:42:33,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 13:42:33,667 INFO L175 Difference]: Start difference. First operand has 389 places, 543 transitions, 8565 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:42:33,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 569 transitions, 9864 flow [2024-06-14 13:42:38,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 569 transitions, 9747 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:38,151 INFO L231 Difference]: Finished difference. Result has 392 places, 547 transitions, 8680 flow [2024-06-14 13:42:38,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8448, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8680, PETRI_PLACES=392, PETRI_TRANSITIONS=547} [2024-06-14 13:42:38,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 13:42:38,151 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 547 transitions, 8680 flow [2024-06-14 13:42:38,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:38,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:38,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:38,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:42:38,152 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:38,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash 383714496, now seen corresponding path program 3 times [2024-06-14 13:42:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:38,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977790350] [2024-06-14 13:42:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:38,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:39,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977790350] [2024-06-14 13:42:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977790350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:39,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480376645] [2024-06-14 13:42:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:39,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:39,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 547 transitions, 8680 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:39,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:39,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:39,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:41,392 INFO L124 PetriNetUnfolderBase]: 3986/6311 cut-off events. [2024-06-14 13:42:41,392 INFO L125 PetriNetUnfolderBase]: For 1193060/1193060 co-relation queries the response was YES. [2024-06-14 13:42:41,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60724 conditions, 6311 events. 3986/6311 cut-off events. For 1193060/1193060 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38878 event pairs, 823 based on Foata normal form. 2/6310 useless extension candidates. Maximal degree in co-relation 60538. Up to 5950 conditions per place. [2024-06-14 13:42:41,489 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 537 selfloop transitions, 26 changer transitions 0/568 dead transitions. [2024-06-14 13:42:41,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 568 transitions, 9962 flow [2024-06-14 13:42:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:42:41,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:42:41,490 INFO L175 Difference]: Start difference. First operand has 392 places, 547 transitions, 8680 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:42:41,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 568 transitions, 9962 flow [2024-06-14 13:42:45,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 568 transitions, 9769 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 13:42:45,195 INFO L231 Difference]: Finished difference. Result has 393 places, 549 transitions, 8640 flow [2024-06-14 13:42:45,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8487, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8640, PETRI_PLACES=393, PETRI_TRANSITIONS=549} [2024-06-14 13:42:45,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 13:42:45,195 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 549 transitions, 8640 flow [2024-06-14 13:42:45,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:45,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:45,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:45,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:42:45,195 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:45,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 383719456, now seen corresponding path program 2 times [2024-06-14 13:42:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:45,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298894186] [2024-06-14 13:42:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:45,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:46,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298894186] [2024-06-14 13:42:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298894186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:46,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:46,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285900656] [2024-06-14 13:42:46,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:46,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:46,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:46,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 549 transitions, 8640 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:46,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:46,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:46,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:48,295 INFO L124 PetriNetUnfolderBase]: 4006/6336 cut-off events. [2024-06-14 13:42:48,296 INFO L125 PetriNetUnfolderBase]: For 1231199/1231199 co-relation queries the response was YES. [2024-06-14 13:42:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60949 conditions, 6336 events. 4006/6336 cut-off events. For 1231199/1231199 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39037 event pairs, 781 based on Foata normal form. 4/6331 useless extension candidates. Maximal degree in co-relation 60762. Up to 5605 conditions per place. [2024-06-14 13:42:48,403 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 93 changer transitions 0/574 dead transitions. [2024-06-14 13:42:48,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 574 transitions, 9957 flow [2024-06-14 13:42:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:42:48,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:42:48,404 INFO L175 Difference]: Start difference. First operand has 393 places, 549 transitions, 8640 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:42:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 574 transitions, 9957 flow [2024-06-14 13:42:53,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 574 transitions, 9820 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:53,710 INFO L231 Difference]: Finished difference. Result has 396 places, 553 transitions, 8815 flow [2024-06-14 13:42:53,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8815, PETRI_PLACES=396, PETRI_TRANSITIONS=553} [2024-06-14 13:42:53,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 13:42:53,711 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 553 transitions, 8815 flow [2024-06-14 13:42:53,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:53,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:53,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:53,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:42:53,711 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:42:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 383898946, now seen corresponding path program 3 times [2024-06-14 13:42:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:53,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96159681] [2024-06-14 13:42:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:53,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:54,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96159681] [2024-06-14 13:42:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96159681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:54,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:54,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891653746] [2024-06-14 13:42:54,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:54,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:54,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:54,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:42:54,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 553 transitions, 8815 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:54,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:54,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:42:54,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:56,905 INFO L124 PetriNetUnfolderBase]: 4058/6413 cut-off events. [2024-06-14 13:42:56,905 INFO L125 PetriNetUnfolderBase]: For 1282392/1282392 co-relation queries the response was YES. [2024-06-14 13:42:56,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62517 conditions, 6413 events. 4058/6413 cut-off events. For 1282392/1282392 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39555 event pairs, 777 based on Foata normal form. 4/6408 useless extension candidates. Maximal degree in co-relation 62329. Up to 5601 conditions per place. [2024-06-14 13:42:56,998 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 460 selfloop transitions, 120 changer transitions 0/585 dead transitions. [2024-06-14 13:42:56,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 585 transitions, 10541 flow [2024-06-14 13:42:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:42:56,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:42:56,999 INFO L175 Difference]: Start difference. First operand has 396 places, 553 transitions, 8815 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:42:56,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 585 transitions, 10541 flow [2024-06-14 13:43:01,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 585 transitions, 10268 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 13:43:01,619 INFO L231 Difference]: Finished difference. Result has 398 places, 561 transitions, 9036 flow [2024-06-14 13:43:01,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8542, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9036, PETRI_PLACES=398, PETRI_TRANSITIONS=561} [2024-06-14 13:43:01,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 13:43:01,620 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 561 transitions, 9036 flow [2024-06-14 13:43:01,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:01,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:01,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:01,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:43:01,620 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:01,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1603236454, now seen corresponding path program 4 times [2024-06-14 13:43:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023102144] [2024-06-14 13:43:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:03,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023102144] [2024-06-14 13:43:03,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023102144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:03,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:03,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:43:03,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109642548] [2024-06-14 13:43:03,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:03,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:43:03,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:03,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:43:03,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:43:03,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:03,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 561 transitions, 9036 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:03,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:03,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:03,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:04,944 INFO L124 PetriNetUnfolderBase]: 4046/6389 cut-off events. [2024-06-14 13:43:04,944 INFO L125 PetriNetUnfolderBase]: For 1272760/1272760 co-relation queries the response was YES. [2024-06-14 13:43:05,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62021 conditions, 6389 events. 4046/6389 cut-off events. For 1272760/1272760 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39334 event pairs, 775 based on Foata normal form. 4/6384 useless extension candidates. Maximal degree in co-relation 61832. Up to 5661 conditions per place. [2024-06-14 13:43:05,067 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 102 changer transitions 0/583 dead transitions. [2024-06-14 13:43:05,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 583 transitions, 10270 flow [2024-06-14 13:43:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:43:05,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:43:05,068 INFO L175 Difference]: Start difference. First operand has 398 places, 561 transitions, 9036 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:43:05,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 583 transitions, 10270 flow [2024-06-14 13:43:09,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 583 transitions, 9941 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-14 13:43:09,711 INFO L231 Difference]: Finished difference. Result has 401 places, 561 transitions, 8918 flow [2024-06-14 13:43:09,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8707, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8918, PETRI_PLACES=401, PETRI_TRANSITIONS=561} [2024-06-14 13:43:09,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-14 13:43:09,712 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 561 transitions, 8918 flow [2024-06-14 13:43:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:09,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:09,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:09,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:43:09,712 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:09,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2020933344, now seen corresponding path program 5 times [2024-06-14 13:43:09,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:09,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908907501] [2024-06-14 13:43:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:10,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908907501] [2024-06-14 13:43:10,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908907501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:10,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:10,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:43:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901603971] [2024-06-14 13:43:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:10,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:43:10,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:43:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:43:10,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:10,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 561 transitions, 8918 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:10,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:10,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:12,774 INFO L124 PetriNetUnfolderBase]: 4066/6420 cut-off events. [2024-06-14 13:43:12,774 INFO L125 PetriNetUnfolderBase]: For 1291334/1291337 co-relation queries the response was YES. [2024-06-14 13:43:12,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62386 conditions, 6420 events. 4066/6420 cut-off events. For 1291334/1291337 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 39553 event pairs, 788 based on Foata normal form. 4/6413 useless extension candidates. Maximal degree in co-relation 62196. Up to 5308 conditions per place. [2024-06-14 13:43:12,863 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 389 selfloop transitions, 191 changer transitions 0/585 dead transitions. [2024-06-14 13:43:12,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 585 transitions, 10523 flow [2024-06-14 13:43:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:43:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:43:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:43:12,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:43:12,864 INFO L175 Difference]: Start difference. First operand has 401 places, 561 transitions, 8918 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:43:12,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 585 transitions, 10523 flow [2024-06-14 13:43:18,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 585 transitions, 10298 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:43:18,022 INFO L231 Difference]: Finished difference. Result has 402 places, 565 transitions, 9216 flow [2024-06-14 13:43:18,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9216, PETRI_PLACES=402, PETRI_TRANSITIONS=565} [2024-06-14 13:43:18,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 13:43:18,022 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 565 transitions, 9216 flow [2024-06-14 13:43:18,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:18,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:18,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:18,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:43:18,022 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:18,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:18,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2020939854, now seen corresponding path program 6 times [2024-06-14 13:43:18,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:18,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548274668] [2024-06-14 13:43:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:18,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:19,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:19,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548274668] [2024-06-14 13:43:19,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548274668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:19,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:19,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:43:19,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850518217] [2024-06-14 13:43:19,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:19,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:43:19,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:43:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:43:19,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:19,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 565 transitions, 9216 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:19,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:19,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:19,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:21,413 INFO L124 PetriNetUnfolderBase]: 4086/6453 cut-off events. [2024-06-14 13:43:21,413 INFO L125 PetriNetUnfolderBase]: For 1315656/1315659 co-relation queries the response was YES. [2024-06-14 13:43:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63286 conditions, 6453 events. 4086/6453 cut-off events. For 1315656/1315659 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39856 event pairs, 802 based on Foata normal form. 4/6446 useless extension candidates. Maximal degree in co-relation 63095. Up to 5498 conditions per place. [2024-06-14 13:43:21,514 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 458 selfloop transitions, 127 changer transitions 0/590 dead transitions. [2024-06-14 13:43:21,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 590 transitions, 10599 flow [2024-06-14 13:43:21,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:43:21,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:43:21,515 INFO L175 Difference]: Start difference. First operand has 402 places, 565 transitions, 9216 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:43:21,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 590 transitions, 10599 flow [2024-06-14 13:43:26,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 590 transitions, 10196 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 13:43:26,352 INFO L231 Difference]: Finished difference. Result has 405 places, 569 transitions, 9217 flow [2024-06-14 13:43:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8833, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9217, PETRI_PLACES=405, PETRI_TRANSITIONS=569} [2024-06-14 13:43:26,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-14 13:43:26,352 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 569 transitions, 9217 flow [2024-06-14 13:43:26,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:26,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:26,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:26,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:43:26,353 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:26,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1641864770, now seen corresponding path program 7 times [2024-06-14 13:43:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349211169] [2024-06-14 13:43:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:26,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:27,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349211169] [2024-06-14 13:43:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349211169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551880011] [2024-06-14 13:43:27,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:27,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:27,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 569 transitions, 9217 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:27,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:27,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:27,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:29,447 INFO L124 PetriNetUnfolderBase]: 4106/6477 cut-off events. [2024-06-14 13:43:29,447 INFO L125 PetriNetUnfolderBase]: For 1315682/1315685 co-relation queries the response was YES. [2024-06-14 13:43:29,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63161 conditions, 6477 events. 4106/6477 cut-off events. For 1315682/1315685 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40001 event pairs, 791 based on Foata normal form. 4/6470 useless extension candidates. Maximal degree in co-relation 62971. Up to 5526 conditions per place. [2024-06-14 13:43:29,548 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 435 selfloop transitions, 153 changer transitions 0/593 dead transitions. [2024-06-14 13:43:29,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 593 transitions, 10592 flow [2024-06-14 13:43:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:43:29,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:43:29,549 INFO L175 Difference]: Start difference. First operand has 405 places, 569 transitions, 9217 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:43:29,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 593 transitions, 10592 flow [2024-06-14 13:43:33,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 593 transitions, 10247 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 13:43:33,717 INFO L231 Difference]: Finished difference. Result has 407 places, 573 transitions, 9316 flow [2024-06-14 13:43:33,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8872, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9316, PETRI_PLACES=407, PETRI_TRANSITIONS=573} [2024-06-14 13:43:33,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 13:43:33,718 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 573 transitions, 9316 flow [2024-06-14 13:43:33,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:33,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:33,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:33,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:43:33,719 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:33,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2021117794, now seen corresponding path program 4 times [2024-06-14 13:43:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:33,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841368835] [2024-06-14 13:43:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:33,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:35,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841368835] [2024-06-14 13:43:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841368835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:35,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:35,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:43:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544868674] [2024-06-14 13:43:35,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:35,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:43:35,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:43:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:43:35,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:35,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 573 transitions, 9316 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:35,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:35,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:35,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:37,133 INFO L124 PetriNetUnfolderBase]: 4101/6467 cut-off events. [2024-06-14 13:43:37,133 INFO L125 PetriNetUnfolderBase]: For 1304079/1304082 co-relation queries the response was YES. [2024-06-14 13:43:37,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62900 conditions, 6467 events. 4101/6467 cut-off events. For 1304079/1304082 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39878 event pairs, 831 based on Foata normal form. 2/6465 useless extension candidates. Maximal degree in co-relation 62709. Up to 6096 conditions per place. [2024-06-14 13:43:37,234 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 555 selfloop transitions, 32 changer transitions 0/592 dead transitions. [2024-06-14 13:43:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 592 transitions, 10648 flow [2024-06-14 13:43:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:43:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:43:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:43:37,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:43:37,235 INFO L175 Difference]: Start difference. First operand has 407 places, 573 transitions, 9316 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:43:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 592 transitions, 10648 flow [2024-06-14 13:43:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 592 transitions, 10247 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:43:40,733 INFO L231 Difference]: Finished difference. Result has 410 places, 575 transitions, 9084 flow [2024-06-14 13:43:40,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8915, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9084, PETRI_PLACES=410, PETRI_TRANSITIONS=575} [2024-06-14 13:43:40,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-14 13:43:40,734 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 575 transitions, 9084 flow [2024-06-14 13:43:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:40,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:40,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:43:40,734 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:40,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1467502600, now seen corresponding path program 8 times [2024-06-14 13:43:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:40,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135949386] [2024-06-14 13:43:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:42,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135949386] [2024-06-14 13:43:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135949386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943504093] [2024-06-14 13:43:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:42,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:42,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:42,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:42,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 575 transitions, 9084 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:42,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:42,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:42,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:43,921 INFO L124 PetriNetUnfolderBase]: 4089/6455 cut-off events. [2024-06-14 13:43:43,921 INFO L125 PetriNetUnfolderBase]: For 1304554/1304557 co-relation queries the response was YES. [2024-06-14 13:43:43,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61739 conditions, 6455 events. 4089/6455 cut-off events. For 1304554/1304557 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39837 event pairs, 801 based on Foata normal form. 4/6448 useless extension candidates. Maximal degree in co-relation 61547. Up to 5503 conditions per place. [2024-06-14 13:43:44,020 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 463 selfloop transitions, 126 changer transitions 0/594 dead transitions. [2024-06-14 13:43:44,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 594 transitions, 10328 flow [2024-06-14 13:43:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:43:44,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:43:44,022 INFO L175 Difference]: Start difference. First operand has 410 places, 575 transitions, 9084 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:43:44,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 594 transitions, 10328 flow [2024-06-14 13:43:48,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 594 transitions, 10117 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-14 13:43:48,842 INFO L231 Difference]: Finished difference. Result has 413 places, 575 transitions, 9132 flow [2024-06-14 13:43:48,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8873, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9132, PETRI_PLACES=413, PETRI_TRANSITIONS=575} [2024-06-14 13:43:48,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 13:43:48,842 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 575 transitions, 9132 flow [2024-06-14 13:43:48,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:48,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:48,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:48,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:43:48,843 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:48,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash 443752877, now seen corresponding path program 1 times [2024-06-14 13:43:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:48,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925273711] [2024-06-14 13:43:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:48,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:49,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:49,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925273711] [2024-06-14 13:43:49,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925273711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:49,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:49,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619924375] [2024-06-14 13:43:49,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:49,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:49,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:49,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:49,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 575 transitions, 9132 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:49,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:49,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:49,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:51,481 INFO L124 PetriNetUnfolderBase]: 4086/6448 cut-off events. [2024-06-14 13:43:51,482 INFO L125 PetriNetUnfolderBase]: For 1290869/1290869 co-relation queries the response was YES. [2024-06-14 13:43:51,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61879 conditions, 6448 events. 4086/6448 cut-off events. For 1290869/1290869 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39697 event pairs, 896 based on Foata normal form. 1/6446 useless extension candidates. Maximal degree in co-relation 61686. Up to 6080 conditions per place. [2024-06-14 13:43:51,580 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 28 changer transitions 0/600 dead transitions. [2024-06-14 13:43:51,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 600 transitions, 10414 flow [2024-06-14 13:43:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:43:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:43:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:43:51,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:43:51,581 INFO L175 Difference]: Start difference. First operand has 413 places, 575 transitions, 9132 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:43:51,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 600 transitions, 10414 flow [2024-06-14 13:43:55,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 600 transitions, 10022 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-14 13:43:55,072 INFO L231 Difference]: Finished difference. Result has 413 places, 575 transitions, 8806 flow [2024-06-14 13:43:55,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8740, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8806, PETRI_PLACES=413, PETRI_TRANSITIONS=575} [2024-06-14 13:43:55,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 13:43:55,073 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 575 transitions, 8806 flow [2024-06-14 13:43:55,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:55,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:55,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:43:55,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:43:55,073 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:43:55,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -229581460, now seen corresponding path program 1 times [2024-06-14 13:43:55,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:55,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512491883] [2024-06-14 13:43:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512491883] [2024-06-14 13:43:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512491883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:55,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:43:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861501460] [2024-06-14 13:43:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:43:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:43:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:43:55,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:43:55,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 575 transitions, 8806 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:55,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:55,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:43:55,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:57,494 INFO L124 PetriNetUnfolderBase]: 4096/6457 cut-off events. [2024-06-14 13:43:57,495 INFO L125 PetriNetUnfolderBase]: For 1316951/1316951 co-relation queries the response was YES. [2024-06-14 13:43:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61511 conditions, 6457 events. 4096/6457 cut-off events. For 1316951/1316951 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39707 event pairs, 879 based on Foata normal form. 2/6444 useless extension candidates. Maximal degree in co-relation 61317. Up to 5967 conditions per place. [2024-06-14 13:43:57,598 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 534 selfloop transitions, 58 changer transitions 0/597 dead transitions. [2024-06-14 13:43:57,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 597 transitions, 10149 flow [2024-06-14 13:43:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:43:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:43:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:43:57,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:43:57,599 INFO L175 Difference]: Start difference. First operand has 413 places, 575 transitions, 8806 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:43:57,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 597 transitions, 10149 flow [2024-06-14 13:44:03,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 597 transitions, 10081 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:44:03,040 INFO L231 Difference]: Finished difference. Result has 414 places, 578 transitions, 8955 flow [2024-06-14 13:44:03,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8738, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8955, PETRI_PLACES=414, PETRI_TRANSITIONS=578} [2024-06-14 13:44:03,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 13:44:03,040 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 578 transitions, 8955 flow [2024-06-14 13:44:03,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:03,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:03,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:03,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:44:03,041 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:03,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1506064016, now seen corresponding path program 2 times [2024-06-14 13:44:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354801828] [2024-06-14 13:44:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:03,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:03,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354801828] [2024-06-14 13:44:03,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354801828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:03,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:03,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:44:03,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868016467] [2024-06-14 13:44:03,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:03,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:44:03,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:44:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:44:03,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:03,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 578 transitions, 8955 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:03,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:03,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:03,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:05,454 INFO L124 PetriNetUnfolderBase]: 4162/6565 cut-off events. [2024-06-14 13:44:05,454 INFO L125 PetriNetUnfolderBase]: For 1395301/1395301 co-relation queries the response was YES. [2024-06-14 13:44:05,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63704 conditions, 6565 events. 4162/6565 cut-off events. For 1395301/1395301 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 40533 event pairs, 839 based on Foata normal form. 2/6552 useless extension candidates. Maximal degree in co-relation 63509. Up to 5701 conditions per place. [2024-06-14 13:44:05,556 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 446 selfloop transitions, 161 changer transitions 0/612 dead transitions. [2024-06-14 13:44:05,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 612 transitions, 11167 flow [2024-06-14 13:44:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:44:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:44:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:44:05,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:44:05,557 INFO L175 Difference]: Start difference. First operand has 414 places, 578 transitions, 8955 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:44:05,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 612 transitions, 11167 flow [2024-06-14 13:44:10,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 612 transitions, 11036 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:44:10,661 INFO L231 Difference]: Finished difference. Result has 419 places, 592 transitions, 9727 flow [2024-06-14 13:44:10,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8824, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9727, PETRI_PLACES=419, PETRI_TRANSITIONS=592} [2024-06-14 13:44:10,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 13:44:10,662 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 592 transitions, 9727 flow [2024-06-14 13:44:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:10,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:10,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:10,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:44:10,662 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:10,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1449953786, now seen corresponding path program 3 times [2024-06-14 13:44:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819983934] [2024-06-14 13:44:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819983934] [2024-06-14 13:44:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819983934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:44:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493494372] [2024-06-14 13:44:11,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:44:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:44:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:44:11,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:11,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 592 transitions, 9727 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:11,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:11,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:11,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:13,123 INFO L124 PetriNetUnfolderBase]: 4150/6527 cut-off events. [2024-06-14 13:44:13,123 INFO L125 PetriNetUnfolderBase]: For 1402782/1402782 co-relation queries the response was YES. [2024-06-14 13:44:13,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64012 conditions, 6527 events. 4150/6527 cut-off events. For 1402782/1402782 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 40150 event pairs, 836 based on Foata normal form. 4/6516 useless extension candidates. Maximal degree in co-relation 63814. Up to 5693 conditions per place. [2024-06-14 13:44:13,224 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 175 changer transitions 0/612 dead transitions. [2024-06-14 13:44:13,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 612 transitions, 11552 flow [2024-06-14 13:44:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:44:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:44:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:44:13,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:44:13,225 INFO L175 Difference]: Start difference. First operand has 419 places, 592 transitions, 9727 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:44:13,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 612 transitions, 11552 flow [2024-06-14 13:44:18,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 612 transitions, 11370 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-14 13:44:18,243 INFO L231 Difference]: Finished difference. Result has 423 places, 592 transitions, 9919 flow [2024-06-14 13:44:18,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9919, PETRI_PLACES=423, PETRI_TRANSITIONS=592} [2024-06-14 13:44:18,243 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 13:44:18,243 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 592 transitions, 9919 flow [2024-06-14 13:44:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:18,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:44:18,244 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:18,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash -285019145, now seen corresponding path program 2 times [2024-06-14 13:44:18,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:18,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108609457] [2024-06-14 13:44:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:18,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108609457] [2024-06-14 13:44:19,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108609457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:19,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:19,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:44:19,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390365823] [2024-06-14 13:44:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:44:19,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:44:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:44:19,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:19,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 592 transitions, 9919 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:19,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:19,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:19,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:21,079 INFO L124 PetriNetUnfolderBase]: 4155/6555 cut-off events. [2024-06-14 13:44:21,079 INFO L125 PetriNetUnfolderBase]: For 1378142/1378145 co-relation queries the response was YES. [2024-06-14 13:44:21,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64599 conditions, 6555 events. 4155/6555 cut-off events. For 1378142/1378145 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40487 event pairs, 911 based on Foata normal form. 1/6552 useless extension candidates. Maximal degree in co-relation 64400. Up to 6066 conditions per place. [2024-06-14 13:44:21,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 565 selfloop transitions, 48 changer transitions 0/618 dead transitions. [2024-06-14 13:44:21,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 618 transitions, 11351 flow [2024-06-14 13:44:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:44:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:44:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:44:21,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:44:21,196 INFO L175 Difference]: Start difference. First operand has 423 places, 592 transitions, 9919 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:44:21,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 618 transitions, 11351 flow [2024-06-14 13:44:26,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 618 transitions, 11035 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:44:26,964 INFO L231 Difference]: Finished difference. Result has 425 places, 595 transitions, 9835 flow [2024-06-14 13:44:26,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9603, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9835, PETRI_PLACES=425, PETRI_TRANSITIONS=595} [2024-06-14 13:44:26,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-14 13:44:26,965 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 595 transitions, 9835 flow [2024-06-14 13:44:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:26,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:26,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:26,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:44:26,965 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash -446136336, now seen corresponding path program 4 times [2024-06-14 13:44:26,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:26,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690387947] [2024-06-14 13:44:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:27,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:27,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690387947] [2024-06-14 13:44:27,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690387947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:27,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:27,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:44:27,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061481899] [2024-06-14 13:44:27,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:27,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:44:27,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:44:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:44:27,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:27,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 595 transitions, 9835 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:27,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:27,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:27,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:29,523 INFO L124 PetriNetUnfolderBase]: 4165/6571 cut-off events. [2024-06-14 13:44:29,523 INFO L125 PetriNetUnfolderBase]: For 1405864/1405864 co-relation queries the response was YES. [2024-06-14 13:44:29,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64560 conditions, 6571 events. 4165/6571 cut-off events. For 1405864/1405864 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 40568 event pairs, 938 based on Foata normal form. 2/6554 useless extension candidates. Maximal degree in co-relation 64360. Up to 6065 conditions per place. [2024-06-14 13:44:29,636 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 557 selfloop transitions, 55 changer transitions 0/617 dead transitions. [2024-06-14 13:44:29,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 617 transitions, 11224 flow [2024-06-14 13:44:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:44:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:44:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:44:29,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:44:29,637 INFO L175 Difference]: Start difference. First operand has 425 places, 595 transitions, 9835 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:44:29,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 617 transitions, 11224 flow [2024-06-14 13:44:34,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 617 transitions, 10983 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 13:44:34,747 INFO L231 Difference]: Finished difference. Result has 426 places, 598 transitions, 9804 flow [2024-06-14 13:44:34,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9594, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9804, PETRI_PLACES=426, PETRI_TRANSITIONS=598} [2024-06-14 13:44:34,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 13:44:34,747 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 598 transitions, 9804 flow [2024-06-14 13:44:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:34,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:34,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:34,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:44:34,748 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:34,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1259112487, now seen corresponding path program 3 times [2024-06-14 13:44:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:34,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034604812] [2024-06-14 13:44:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:34,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034604812] [2024-06-14 13:44:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034604812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:35,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:44:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22686075] [2024-06-14 13:44:35,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:44:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:44:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:44:35,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:35,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 598 transitions, 9804 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:35,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:35,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:35,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:37,738 INFO L124 PetriNetUnfolderBase]: 4317/6812 cut-off events. [2024-06-14 13:44:37,738 INFO L125 PetriNetUnfolderBase]: For 1421733/1421736 co-relation queries the response was YES. [2024-06-14 13:44:37,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66893 conditions, 6812 events. 4317/6812 cut-off events. For 1421733/1421736 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42155 event pairs, 908 based on Foata normal form. 1/6800 useless extension candidates. Maximal degree in co-relation 66692. Up to 6197 conditions per place. [2024-06-14 13:44:37,838 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 582 selfloop transitions, 86 changer transitions 0/673 dead transitions. [2024-06-14 13:44:37,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 673 transitions, 12287 flow [2024-06-14 13:44:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:44:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:44:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:44:37,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 13:44:37,839 INFO L175 Difference]: Start difference. First operand has 426 places, 598 transitions, 9804 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:44:37,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 673 transitions, 12287 flow [2024-06-14 13:44:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 673 transitions, 12065 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:44:42,522 INFO L231 Difference]: Finished difference. Result has 433 places, 646 transitions, 10869 flow [2024-06-14 13:44:42,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9639, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10869, PETRI_PLACES=433, PETRI_TRANSITIONS=646} [2024-06-14 13:44:42,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-14 13:44:42,522 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 646 transitions, 10869 flow [2024-06-14 13:44:42,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:42,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:42,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:42,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:44:42,523 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:42,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1866443278, now seen corresponding path program 5 times [2024-06-14 13:44:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:42,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629035101] [2024-06-14 13:44:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:43,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:43,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629035101] [2024-06-14 13:44:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629035101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:43,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:43,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:44:43,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196962714] [2024-06-14 13:44:43,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:44:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:44:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:44:43,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:43,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 646 transitions, 10869 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:43,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:43,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:43,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:45,323 INFO L124 PetriNetUnfolderBase]: 4327/6814 cut-off events. [2024-06-14 13:44:45,324 INFO L125 PetriNetUnfolderBase]: For 1451478/1451478 co-relation queries the response was YES. [2024-06-14 13:44:45,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67412 conditions, 6814 events. 4327/6814 cut-off events. For 1451478/1451478 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42158 event pairs, 945 based on Foata normal form. 2/6789 useless extension candidates. Maximal degree in co-relation 67206. Up to 6086 conditions per place. [2024-06-14 13:44:45,431 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 552 selfloop transitions, 109 changer transitions 0/666 dead transitions. [2024-06-14 13:44:45,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 666 transitions, 12618 flow [2024-06-14 13:44:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:44:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:44:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:44:45,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:44:45,432 INFO L175 Difference]: Start difference. First operand has 433 places, 646 transitions, 10869 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:44:45,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 666 transitions, 12618 flow [2024-06-14 13:44:50,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 666 transitions, 12455 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 13:44:50,166 INFO L231 Difference]: Finished difference. Result has 439 places, 649 transitions, 11023 flow [2024-06-14 13:44:50,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10706, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11023, PETRI_PLACES=439, PETRI_TRANSITIONS=649} [2024-06-14 13:44:50,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 13:44:50,167 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 649 transitions, 11023 flow [2024-06-14 13:44:50,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:50,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:50,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:50,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:44:50,167 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:50,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash 69249692, now seen corresponding path program 6 times [2024-06-14 13:44:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:50,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101216623] [2024-06-14 13:44:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:50,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101216623] [2024-06-14 13:44:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101216623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:50,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:50,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:44:50,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963014653] [2024-06-14 13:44:50,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:50,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:44:50,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:44:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:44:51,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:51,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 649 transitions, 11023 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:51,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:51,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:51,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:52,909 INFO L124 PetriNetUnfolderBase]: 4321/6812 cut-off events. [2024-06-14 13:44:52,909 INFO L125 PetriNetUnfolderBase]: For 1456750/1456750 co-relation queries the response was YES. [2024-06-14 13:44:52,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67337 conditions, 6812 events. 4321/6812 cut-off events. For 1456750/1456750 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42177 event pairs, 906 based on Foata normal form. 2/6787 useless extension candidates. Maximal degree in co-relation 67129. Up to 6081 conditions per place. [2024-06-14 13:44:53,019 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 555 selfloop transitions, 105 changer transitions 0/665 dead transitions. [2024-06-14 13:44:53,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 665 transitions, 12413 flow [2024-06-14 13:44:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:44:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:44:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:44:53,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:44:53,020 INFO L175 Difference]: Start difference. First operand has 439 places, 649 transitions, 11023 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:44:53,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 665 transitions, 12413 flow [2024-06-14 13:44:58,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 665 transitions, 12059 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 13:44:58,890 INFO L231 Difference]: Finished difference. Result has 441 places, 649 transitions, 10888 flow [2024-06-14 13:44:58,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10669, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10888, PETRI_PLACES=441, PETRI_TRANSITIONS=649} [2024-06-14 13:44:58,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-14 13:44:58,890 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 649 transitions, 10888 flow [2024-06-14 13:44:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:58,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:58,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:44:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:44:58,891 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:44:58,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1351626136, now seen corresponding path program 7 times [2024-06-14 13:44:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:58,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112623362] [2024-06-14 13:44:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:59,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:59,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112623362] [2024-06-14 13:44:59,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112623362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:59,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:59,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:44:59,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539514749] [2024-06-14 13:44:59,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:44:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:44:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:44:59,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:44:59,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 649 transitions, 10888 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:59,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:59,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:44:59,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:01,664 INFO L124 PetriNetUnfolderBase]: 4357/6847 cut-off events. [2024-06-14 13:45:01,665 INFO L125 PetriNetUnfolderBase]: For 1513116/1513119 co-relation queries the response was YES. [2024-06-14 13:45:01,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68168 conditions, 6847 events. 4357/6847 cut-off events. For 1513116/1513119 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42312 event pairs, 930 based on Foata normal form. 4/6831 useless extension candidates. Maximal degree in co-relation 67959. Up to 5369 conditions per place. [2024-06-14 13:45:01,783 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 373 selfloop transitions, 297 changer transitions 0/675 dead transitions. [2024-06-14 13:45:01,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 675 transitions, 13360 flow [2024-06-14 13:45:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:45:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:45:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:45:01,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:45:01,784 INFO L175 Difference]: Start difference. First operand has 441 places, 649 transitions, 10888 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:45:01,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 675 transitions, 13360 flow [2024-06-14 13:45:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 675 transitions, 13118 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:45:06,882 INFO L231 Difference]: Finished difference. Result has 442 places, 658 transitions, 11512 flow [2024-06-14 13:45:06,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10646, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11512, PETRI_PLACES=442, PETRI_TRANSITIONS=658} [2024-06-14 13:45:06,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 13:45:06,882 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 658 transitions, 11512 flow [2024-06-14 13:45:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:45:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:45:06,882 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:45:06,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1346864536, now seen corresponding path program 8 times [2024-06-14 13:45:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:06,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068762383] [2024-06-14 13:45:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:07,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068762383] [2024-06-14 13:45:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068762383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:45:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141959121] [2024-06-14 13:45:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:07,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:45:07,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:45:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:45:07,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:45:07,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 658 transitions, 11512 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:07,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:07,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:45:07,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:09,648 INFO L124 PetriNetUnfolderBase]: 4403/6938 cut-off events. [2024-06-14 13:45:09,649 INFO L125 PetriNetUnfolderBase]: For 1557213/1557213 co-relation queries the response was YES. [2024-06-14 13:45:09,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69943 conditions, 6938 events. 4403/6938 cut-off events. For 1557213/1557213 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43048 event pairs, 920 based on Foata normal form. 4/6934 useless extension candidates. Maximal degree in co-relation 69733. Up to 6509 conditions per place. [2024-06-14 13:45:09,770 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 629 selfloop transitions, 53 changer transitions 0/687 dead transitions. [2024-06-14 13:45:09,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 687 transitions, 13596 flow [2024-06-14 13:45:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:45:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:45:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:45:09,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:45:09,770 INFO L175 Difference]: Start difference. First operand has 442 places, 658 transitions, 11512 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:45:09,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 687 transitions, 13596 flow [2024-06-14 13:45:15,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 687 transitions, 12824 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-14 13:45:15,115 INFO L231 Difference]: Finished difference. Result has 447 places, 673 transitions, 11288 flow [2024-06-14 13:45:15,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10768, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11288, PETRI_PLACES=447, PETRI_TRANSITIONS=673} [2024-06-14 13:45:15,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-14 13:45:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 673 transitions, 11288 flow [2024-06-14 13:45:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:15,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:15,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:45:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:45:15,116 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:45:15,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash 947367226, now seen corresponding path program 9 times [2024-06-14 13:45:15,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390994482] [2024-06-14 13:45:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:15,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390994482] [2024-06-14 13:45:15,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390994482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:15,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:15,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:45:15,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296882078] [2024-06-14 13:45:15,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:15,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:45:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:45:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:45:15,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:45:15,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 673 transitions, 11288 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:15,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:15,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:45:15,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:17,983 INFO L124 PetriNetUnfolderBase]: 4439/6988 cut-off events. [2024-06-14 13:45:17,983 INFO L125 PetriNetUnfolderBase]: For 1592290/1592290 co-relation queries the response was YES. [2024-06-14 13:45:18,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70046 conditions, 6988 events. 4439/6988 cut-off events. For 1592290/1592290 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 43360 event pairs, 921 based on Foata normal form. 4/6984 useless extension candidates. Maximal degree in co-relation 69834. Up to 6472 conditions per place. [2024-06-14 13:45:18,098 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 618 selfloop transitions, 76 changer transitions 0/699 dead transitions. [2024-06-14 13:45:18,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 699 transitions, 13551 flow [2024-06-14 13:45:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:45:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:45:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:45:18,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 13:45:18,099 INFO L175 Difference]: Start difference. First operand has 447 places, 673 transitions, 11288 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:45:18,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 699 transitions, 13551 flow [2024-06-14 13:45:24,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 699 transitions, 13317 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-14 13:45:24,948 INFO L231 Difference]: Finished difference. Result has 453 places, 681 transitions, 11495 flow [2024-06-14 13:45:24,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11054, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11495, PETRI_PLACES=453, PETRI_TRANSITIONS=681} [2024-06-14 13:45:24,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-14 13:45:24,949 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 681 transitions, 11495 flow [2024-06-14 13:45:24,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:24,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:24,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:45:24,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:45:24,949 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:45:24,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1861040976, now seen corresponding path program 10 times [2024-06-14 13:45:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:24,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575464302] [2024-06-14 13:45:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:24,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:25,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575464302] [2024-06-14 13:45:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575464302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:25,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:45:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605050516] [2024-06-14 13:45:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:45:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:45:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:45:25,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:45:25,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 681 transitions, 11495 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:25,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:25,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:45:25,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:27,860 INFO L124 PetriNetUnfolderBase]: 4449/7003 cut-off events. [2024-06-14 13:45:27,860 INFO L125 PetriNetUnfolderBase]: For 1600967/1600970 co-relation queries the response was YES. [2024-06-14 13:45:27,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70360 conditions, 7003 events. 4449/7003 cut-off events. For 1600967/1600970 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43520 event pairs, 941 based on Foata normal form. 2/6985 useless extension candidates. Maximal degree in co-relation 70146. Up to 5443 conditions per place. [2024-06-14 13:45:27,977 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 399 selfloop transitions, 298 changer transitions 0/702 dead transitions. [2024-06-14 13:45:27,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 702 transitions, 13887 flow [2024-06-14 13:45:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:45:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:45:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:45:27,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:45:27,978 INFO L175 Difference]: Start difference. First operand has 453 places, 681 transitions, 11495 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:45:27,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 702 transitions, 13887 flow [2024-06-14 13:45:34,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 702 transitions, 13498 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-14 13:45:34,037 INFO L231 Difference]: Finished difference. Result has 454 places, 685 transitions, 11818 flow [2024-06-14 13:45:34,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11106, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11818, PETRI_PLACES=454, PETRI_TRANSITIONS=685} [2024-06-14 13:45:34,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-14 13:45:34,037 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 685 transitions, 11818 flow [2024-06-14 13:45:34,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:34,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:34,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:45:34,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:45:34,038 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:45:34,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1860625266, now seen corresponding path program 11 times [2024-06-14 13:45:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:34,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126735951] [2024-06-14 13:45:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:34,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:34,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:34,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126735951] [2024-06-14 13:45:34,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126735951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:34,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:34,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:45:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649292458] [2024-06-14 13:45:34,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:34,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:45:34,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:45:34,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:45:34,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:45:34,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 685 transitions, 11818 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:34,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:34,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:45:34,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:36,877 INFO L124 PetriNetUnfolderBase]: 4443/6989 cut-off events. [2024-06-14 13:45:36,877 INFO L125 PetriNetUnfolderBase]: For 1606069/1606072 co-relation queries the response was YES. [2024-06-14 13:45:36,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70596 conditions, 6989 events. 4443/6989 cut-off events. For 1606069/1606072 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43360 event pairs, 953 based on Foata normal form. 2/6971 useless extension candidates. Maximal degree in co-relation 70382. Up to 5440 conditions per place. [2024-06-14 13:45:36,998 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 398 selfloop transitions, 299 changer transitions 0/702 dead transitions. [2024-06-14 13:45:36,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 702 transitions, 14108 flow [2024-06-14 13:45:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:45:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:45:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:45:36,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:45:36,999 INFO L175 Difference]: Start difference. First operand has 454 places, 685 transitions, 11818 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:45:36,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 702 transitions, 14108 flow [2024-06-14 13:45:43,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 702 transitions, 13513 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 13:45:43,081 INFO L231 Difference]: Finished difference. Result has 458 places, 685 transitions, 11827 flow [2024-06-14 13:45:43,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11827, PETRI_PLACES=458, PETRI_TRANSITIONS=685} [2024-06-14 13:45:43,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 13:45:43,082 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 685 transitions, 11827 flow [2024-06-14 13:45:43,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:43,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:43,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:45:43,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:45:43,082 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:45:43,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1839788436, now seen corresponding path program 12 times [2024-06-14 13:45:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563801258] [2024-06-14 13:45:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563801258] [2024-06-14 13:45:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563801258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:43,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:43,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:45:43,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686081318] [2024-06-14 13:45:43,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:45:43,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:45:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:45:43,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:45:43,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 685 transitions, 11827 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:43,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:43,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:45:43,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:46,063 INFO L124 PetriNetUnfolderBase]: 4437/6990 cut-off events. [2024-06-14 13:45:46,063 INFO L125 PetriNetUnfolderBase]: For 1605107/1605107 co-relation queries the response was YES. [2024-06-14 13:45:46,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70331 conditions, 6990 events. 4437/6990 cut-off events. For 1605107/1605107 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43356 event pairs, 916 based on Foata normal form. 2/6984 useless extension candidates. Maximal degree in co-relation 70116. Up to 6475 conditions per place. [2024-06-14 13:45:46,171 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 617 selfloop transitions, 78 changer transitions 0/700 dead transitions. [2024-06-14 13:45:46,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 700 transitions, 13555 flow [2024-06-14 13:45:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:45:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:45:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:45:46,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:45:46,172 INFO L175 Difference]: Start difference. First operand has 458 places, 685 transitions, 11827 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:45:46,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 700 transitions, 13555 flow [2024-06-14 13:45:52,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 700 transitions, 12803 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:45:52,116 INFO L231 Difference]: Finished difference. Result has 460 places, 685 transitions, 11238 flow [2024-06-14 13:45:52,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11075, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11238, PETRI_PLACES=460, PETRI_TRANSITIONS=685} [2024-06-14 13:45:52,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-14 13:45:52,116 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 685 transitions, 11238 flow [2024-06-14 13:45:52,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:52,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:52,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:45:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:45:52,117 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:45:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 355244808, now seen corresponding path program 1 times [2024-06-14 13:45:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362550709] [2024-06-14 13:45:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:52,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:52,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:52,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362550709] [2024-06-14 13:45:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362550709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:52,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:45:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357615231] [2024-06-14 13:45:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:45:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:45:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:45:52,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:45:52,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 685 transitions, 11238 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:52,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:52,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:45:52,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:54,854 INFO L124 PetriNetUnfolderBase]: 4445/6998 cut-off events. [2024-06-14 13:45:54,854 INFO L125 PetriNetUnfolderBase]: For 1621722/1621722 co-relation queries the response was YES. [2024-06-14 13:45:54,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69713 conditions, 6998 events. 4445/6998 cut-off events. For 1621722/1621722 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43364 event pairs, 804 based on Foata normal form. 2/6985 useless extension candidates. Maximal degree in co-relation 69497. Up to 6547 conditions per place. [2024-06-14 13:45:54,972 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 668 selfloop transitions, 29 changer transitions 0/702 dead transitions. [2024-06-14 13:45:54,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 702 transitions, 12720 flow [2024-06-14 13:45:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:45:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:45:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:45:54,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 13:45:54,973 INFO L175 Difference]: Start difference. First operand has 460 places, 685 transitions, 11238 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:45:54,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 702 transitions, 12720 flow [2024-06-14 13:46:02,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 702 transitions, 12337 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:46:02,300 INFO L231 Difference]: Finished difference. Result has 458 places, 687 transitions, 10966 flow [2024-06-14 13:46:02,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10966, PETRI_PLACES=458, PETRI_TRANSITIONS=687} [2024-06-14 13:46:02,300 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 13:46:02,300 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 687 transitions, 10966 flow [2024-06-14 13:46:02,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:02,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:02,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:46:02,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:46:02,301 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:46:02,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1793043602, now seen corresponding path program 2 times [2024-06-14 13:46:02,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:02,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261073611] [2024-06-14 13:46:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:02,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:03,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261073611] [2024-06-14 13:46:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261073611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:03,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:03,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:46:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960971631] [2024-06-14 13:46:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:46:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:46:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:46:03,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:46:03,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 687 transitions, 10966 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:03,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:03,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:46:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:05,032 INFO L124 PetriNetUnfolderBase]: 4435/6984 cut-off events. [2024-06-14 13:46:05,032 INFO L125 PetriNetUnfolderBase]: For 1617239/1617239 co-relation queries the response was YES. [2024-06-14 13:46:05,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68598 conditions, 6984 events. 4435/6984 cut-off events. For 1617239/1617239 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43269 event pairs, 923 based on Foata normal form. 4/6973 useless extension candidates. Maximal degree in co-relation 68382. Up to 6468 conditions per place. [2024-06-14 13:46:05,147 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 638 selfloop transitions, 62 changer transitions 0/705 dead transitions. [2024-06-14 13:46:05,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 705 transitions, 12527 flow [2024-06-14 13:46:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:46:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:46:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:46:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:46:05,148 INFO L175 Difference]: Start difference. First operand has 458 places, 687 transitions, 10966 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:46:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 705 transitions, 12527 flow [2024-06-14 13:46:12,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 705 transitions, 12432 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:46:12,244 INFO L231 Difference]: Finished difference. Result has 461 places, 694 transitions, 11163 flow [2024-06-14 13:46:12,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10871, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11163, PETRI_PLACES=461, PETRI_TRANSITIONS=694} [2024-06-14 13:46:12,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-14 13:46:12,245 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 694 transitions, 11163 flow [2024-06-14 13:46:12,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:12,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:12,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:46:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:46:12,245 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:46:12,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2025497394, now seen corresponding path program 1 times [2024-06-14 13:46:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:12,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846453326] [2024-06-14 13:46:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846453326] [2024-06-14 13:46:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846453326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:13,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:13,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:13,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59270341] [2024-06-14 13:46:13,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:13,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:13,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:13,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:46:13,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 694 transitions, 11163 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:13,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:13,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:46:13,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:15,377 INFO L124 PetriNetUnfolderBase]: 4501/7096 cut-off events. [2024-06-14 13:46:15,377 INFO L125 PetriNetUnfolderBase]: For 1740582/1740582 co-relation queries the response was YES. [2024-06-14 13:46:15,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71107 conditions, 7096 events. 4501/7096 cut-off events. For 1740582/1740582 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44156 event pairs, 924 based on Foata normal form. 6/7094 useless extension candidates. Maximal degree in co-relation 70889. Up to 6534 conditions per place. [2024-06-14 13:46:15,505 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 653 selfloop transitions, 59 changer transitions 0/717 dead transitions. [2024-06-14 13:46:15,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 717 transitions, 13082 flow [2024-06-14 13:46:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:46:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:46:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:46:15,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:46:15,506 INFO L175 Difference]: Start difference. First operand has 461 places, 694 transitions, 11163 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:46:15,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 717 transitions, 13082 flow [2024-06-14 13:46:22,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 717 transitions, 12915 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-14 13:46:22,133 INFO L231 Difference]: Finished difference. Result has 467 places, 696 transitions, 11202 flow [2024-06-14 13:46:22,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11010, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11202, PETRI_PLACES=467, PETRI_TRANSITIONS=696} [2024-06-14 13:46:22,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-14 13:46:22,133 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 696 transitions, 11202 flow [2024-06-14 13:46:22,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:22,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:22,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:46:22,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:46:22,134 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:46:22,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:22,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1595066866, now seen corresponding path program 2 times [2024-06-14 13:46:22,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:22,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903706175] [2024-06-14 13:46:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:22,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:23,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:23,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903706175] [2024-06-14 13:46:23,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903706175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:23,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:23,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:23,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539046130] [2024-06-14 13:46:23,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:23,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:23,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:46:23,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 696 transitions, 11202 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:23,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:23,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:46:23,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:25,436 INFO L124 PetriNetUnfolderBase]: 4491/7076 cut-off events. [2024-06-14 13:46:25,436 INFO L125 PetriNetUnfolderBase]: For 1707010/1707010 co-relation queries the response was YES. [2024-06-14 13:46:25,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69901 conditions, 7076 events. 4491/7076 cut-off events. For 1707010/1707010 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43985 event pairs, 931 based on Foata normal form. 8/7076 useless extension candidates. Maximal degree in co-relation 69681. Up to 6616 conditions per place. [2024-06-14 13:46:25,556 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 652 selfloop transitions, 57 changer transitions 0/714 dead transitions. [2024-06-14 13:46:25,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 714 transitions, 12722 flow [2024-06-14 13:46:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:46:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:46:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 13:46:25,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-14 13:46:25,557 INFO L175 Difference]: Start difference. First operand has 467 places, 696 transitions, 11202 flow. Second operand 10 states and 163 transitions. [2024-06-14 13:46:25,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 714 transitions, 12722 flow [2024-06-14 13:46:33,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 714 transitions, 12617 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:46:33,085 INFO L231 Difference]: Finished difference. Result has 473 places, 698 transitions, 11241 flow [2024-06-14 13:46:33,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11097, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11241, PETRI_PLACES=473, PETRI_TRANSITIONS=698} [2024-06-14 13:46:33,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-14 13:46:33,085 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 698 transitions, 11241 flow [2024-06-14 13:46:33,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:33,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:33,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:46:33,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:46:33,085 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:46:33,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash -795212619, now seen corresponding path program 4 times [2024-06-14 13:46:33,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:33,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195777897] [2024-06-14 13:46:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:33,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:34,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:34,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195777897] [2024-06-14 13:46:34,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195777897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:34,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:34,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916393276] [2024-06-14 13:46:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:34,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:46:34,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 698 transitions, 11241 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:34,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:34,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:46:34,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:36,028 INFO L124 PetriNetUnfolderBase]: 4496/7081 cut-off events. [2024-06-14 13:46:36,028 INFO L125 PetriNetUnfolderBase]: For 1657229/1657229 co-relation queries the response was YES. [2024-06-14 13:46:36,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70039 conditions, 7081 events. 4496/7081 cut-off events. For 1657229/1657229 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 44054 event pairs, 941 based on Foata normal form. 1/7067 useless extension candidates. Maximal degree in co-relation 69817. Up to 6487 conditions per place. [2024-06-14 13:46:36,151 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 646 selfloop transitions, 70 changer transitions 0/721 dead transitions. [2024-06-14 13:46:36,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 721 transitions, 12878 flow [2024-06-14 13:46:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:46:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:46:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:46:36,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:46:36,152 INFO L175 Difference]: Start difference. First operand has 473 places, 698 transitions, 11241 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:46:36,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 721 transitions, 12878 flow [2024-06-14 13:46:44,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 721 transitions, 12773 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:46:44,030 INFO L231 Difference]: Finished difference. Result has 474 places, 701 transitions, 11423 flow [2024-06-14 13:46:44,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11136, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11423, PETRI_PLACES=474, PETRI_TRANSITIONS=701} [2024-06-14 13:46:44,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-14 13:46:44,031 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 701 transitions, 11423 flow [2024-06-14 13:46:44,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:44,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:44,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:46:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:46:44,031 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:46:44,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1479168867, now seen corresponding path program 5 times [2024-06-14 13:46:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:44,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554726571] [2024-06-14 13:46:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:45,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554726571] [2024-06-14 13:46:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554726571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:45,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:45,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:45,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972052916] [2024-06-14 13:46:45,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:45,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:45,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:45,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:46:45,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 701 transitions, 11423 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:45,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:45,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:46:45,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:47,183 INFO L124 PetriNetUnfolderBase]: 4501/7079 cut-off events. [2024-06-14 13:46:47,183 INFO L125 PetriNetUnfolderBase]: For 1681300/1681300 co-relation queries the response was YES. [2024-06-14 13:46:47,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70458 conditions, 7079 events. 4501/7079 cut-off events. For 1681300/1681300 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 44011 event pairs, 961 based on Foata normal form. 1/7053 useless extension candidates. Maximal degree in co-relation 70235. Up to 6483 conditions per place. [2024-06-14 13:46:47,301 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 639 selfloop transitions, 78 changer transitions 0/722 dead transitions. [2024-06-14 13:46:47,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 722 transitions, 13066 flow [2024-06-14 13:46:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:46:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:46:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:46:47,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:46:47,302 INFO L175 Difference]: Start difference. First operand has 474 places, 701 transitions, 11423 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:46:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 722 transitions, 13066 flow [2024-06-14 13:46:54,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 722 transitions, 12813 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 13:46:54,905 INFO L231 Difference]: Finished difference. Result has 476 places, 704 transitions, 11479 flow [2024-06-14 13:46:54,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11176, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11479, PETRI_PLACES=476, PETRI_TRANSITIONS=704} [2024-06-14 13:46:54,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-14 13:46:54,906 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 704 transitions, 11479 flow [2024-06-14 13:46:54,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:54,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:54,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:46:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:46:54,906 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:46:54,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1017727865, now seen corresponding path program 6 times [2024-06-14 13:46:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199507956] [2024-06-14 13:46:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199507956] [2024-06-14 13:46:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199507956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:56,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155521042] [2024-06-14 13:46:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:56,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:46:56,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 704 transitions, 11479 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:56,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:56,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:46:56,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:58,208 INFO L124 PetriNetUnfolderBase]: 4503/7086 cut-off events. [2024-06-14 13:46:58,209 INFO L125 PetriNetUnfolderBase]: For 1681203/1681203 co-relation queries the response was YES. [2024-06-14 13:46:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70295 conditions, 7086 events. 4503/7086 cut-off events. For 1681203/1681203 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 44018 event pairs, 939 based on Foata normal form. 2/7061 useless extension candidates. Maximal degree in co-relation 70071. Up to 6275 conditions per place. [2024-06-14 13:46:58,341 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 589 selfloop transitions, 130 changer transitions 0/724 dead transitions. [2024-06-14 13:46:58,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 724 transitions, 13370 flow [2024-06-14 13:46:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:46:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:46:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:46:58,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:46:58,342 INFO L175 Difference]: Start difference. First operand has 476 places, 704 transitions, 11479 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:46:58,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 724 transitions, 13370 flow [2024-06-14 13:47:06,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 724 transitions, 13044 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-14 13:47:06,861 INFO L231 Difference]: Finished difference. Result has 479 places, 707 transitions, 11592 flow [2024-06-14 13:47:06,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11155, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11592, PETRI_PLACES=479, PETRI_TRANSITIONS=707} [2024-06-14 13:47:06,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-14 13:47:06,861 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 707 transitions, 11592 flow [2024-06-14 13:47:06,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:06,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:06,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:47:06,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:47:06,861 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:06,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash -78998774, now seen corresponding path program 3 times [2024-06-14 13:47:06,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:06,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884044008] [2024-06-14 13:47:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:07,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884044008] [2024-06-14 13:47:07,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884044008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:07,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:07,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698388911] [2024-06-14 13:47:07,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:07,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:47:07,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 707 transitions, 11592 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:07,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:07,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:47:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:10,256 INFO L124 PetriNetUnfolderBase]: 4814/7617 cut-off events. [2024-06-14 13:47:10,256 INFO L125 PetriNetUnfolderBase]: For 2155608/2155611 co-relation queries the response was YES. [2024-06-14 13:47:10,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78919 conditions, 7617 events. 4814/7617 cut-off events. For 2155608/2155611 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 48043 event pairs, 1012 based on Foata normal form. 18/7615 useless extension candidates. Maximal degree in co-relation 78693. Up to 5320 conditions per place. [2024-06-14 13:47:10,388 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 454 selfloop transitions, 286 changer transitions 0/745 dead transitions. [2024-06-14 13:47:10,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 745 transitions, 14720 flow [2024-06-14 13:47:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:47:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:47:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:47:10,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:47:10,389 INFO L175 Difference]: Start difference. First operand has 479 places, 707 transitions, 11592 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:47:10,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 745 transitions, 14720 flow [2024-06-14 13:47:17,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 745 transitions, 14490 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:47:17,691 INFO L231 Difference]: Finished difference. Result has 486 places, 716 transitions, 12313 flow [2024-06-14 13:47:17,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11370, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12313, PETRI_PLACES=486, PETRI_TRANSITIONS=716} [2024-06-14 13:47:17,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-14 13:47:17,691 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 716 transitions, 12313 flow [2024-06-14 13:47:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:17,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:47:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:47:17,692 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1186104074, now seen corresponding path program 4 times [2024-06-14 13:47:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857850036] [2024-06-14 13:47:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:18,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857850036] [2024-06-14 13:47:18,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857850036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:18,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:18,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682726724] [2024-06-14 13:47:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:18,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:18,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:18,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:47:18,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 716 transitions, 12313 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:18,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:18,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:47:18,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:21,207 INFO L124 PetriNetUnfolderBase]: 5060/7999 cut-off events. [2024-06-14 13:47:21,207 INFO L125 PetriNetUnfolderBase]: For 2462496/2462499 co-relation queries the response was YES. [2024-06-14 13:47:21,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87689 conditions, 7999 events. 5060/7999 cut-off events. For 2462496/2462499 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 50740 event pairs, 1090 based on Foata normal form. 18/7997 useless extension candidates. Maximal degree in co-relation 87460. Up to 6173 conditions per place. [2024-06-14 13:47:21,354 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 468 selfloop transitions, 277 changer transitions 0/750 dead transitions. [2024-06-14 13:47:21,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 750 transitions, 15370 flow [2024-06-14 13:47:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:47:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:47:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:47:21,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:47:21,355 INFO L175 Difference]: Start difference. First operand has 486 places, 716 transitions, 12313 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:47:21,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 750 transitions, 15370 flow [2024-06-14 13:47:29,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 750 transitions, 15036 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-14 13:47:29,200 INFO L231 Difference]: Finished difference. Result has 493 places, 723 transitions, 12801 flow [2024-06-14 13:47:29,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11997, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12801, PETRI_PLACES=493, PETRI_TRANSITIONS=723} [2024-06-14 13:47:29,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-14 13:47:29,201 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 723 transitions, 12801 flow [2024-06-14 13:47:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:29,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:29,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:47:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:47:29,201 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:29,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash 742338764, now seen corresponding path program 5 times [2024-06-14 13:47:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:29,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309085192] [2024-06-14 13:47:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:30,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:30,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309085192] [2024-06-14 13:47:30,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309085192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:30,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:30,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951120714] [2024-06-14 13:47:30,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:30,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:47:30,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 723 transitions, 12801 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:30,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:30,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:47:30,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:32,936 INFO L124 PetriNetUnfolderBase]: 5141/8146 cut-off events. [2024-06-14 13:47:32,936 INFO L125 PetriNetUnfolderBase]: For 2547082/2547085 co-relation queries the response was YES. [2024-06-14 13:47:33,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89271 conditions, 8146 events. 5141/8146 cut-off events. For 2547082/2547085 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 51962 event pairs, 1126 based on Foata normal form. 24/8150 useless extension candidates. Maximal degree in co-relation 89039. Up to 6726 conditions per place. [2024-06-14 13:47:33,095 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 501 selfloop transitions, 241 changer transitions 0/747 dead transitions. [2024-06-14 13:47:33,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 747 transitions, 15083 flow [2024-06-14 13:47:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:47:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:47:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:47:33,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:47:33,096 INFO L175 Difference]: Start difference. First operand has 493 places, 723 transitions, 12801 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:47:33,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 747 transitions, 15083 flow [2024-06-14 13:47:42,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 747 transitions, 14326 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 13:47:42,422 INFO L231 Difference]: Finished difference. Result has 495 places, 725 transitions, 12620 flow [2024-06-14 13:47:42,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12044, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12620, PETRI_PLACES=495, PETRI_TRANSITIONS=725} [2024-06-14 13:47:42,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-14 13:47:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 725 transitions, 12620 flow [2024-06-14 13:47:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:42,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:42,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:47:42,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:47:42,422 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1985633420, now seen corresponding path program 6 times [2024-06-14 13:47:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72469084] [2024-06-14 13:47:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:43,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:43,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72469084] [2024-06-14 13:47:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72469084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:43,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:43,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861971140] [2024-06-14 13:47:43,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:43,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:43,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:43,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:47:43,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 725 transitions, 12620 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:43,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:43,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:47:43,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:46,486 INFO L124 PetriNetUnfolderBase]: 5123/8109 cut-off events. [2024-06-14 13:47:46,486 INFO L125 PetriNetUnfolderBase]: For 2320856/2320856 co-relation queries the response was YES. [2024-06-14 13:47:46,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87484 conditions, 8109 events. 5123/8109 cut-off events. For 2320856/2320856 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 51590 event pairs, 1098 based on Foata normal form. 8/8109 useless extension candidates. Maximal degree in co-relation 87251. Up to 7552 conditions per place. [2024-06-14 13:47:46,640 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 669 selfloop transitions, 69 changer transitions 0/743 dead transitions. [2024-06-14 13:47:46,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 743 transitions, 14189 flow [2024-06-14 13:47:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:47:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:47:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-14 13:47:46,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-14 13:47:46,641 INFO L175 Difference]: Start difference. First operand has 495 places, 725 transitions, 12620 flow. Second operand 11 states and 178 transitions. [2024-06-14 13:47:46,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 743 transitions, 14189 flow [2024-06-14 13:47:54,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 743 transitions, 13671 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:47:54,164 INFO L231 Difference]: Finished difference. Result has 499 places, 726 transitions, 12261 flow [2024-06-14 13:47:54,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12102, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12261, PETRI_PLACES=499, PETRI_TRANSITIONS=726} [2024-06-14 13:47:54,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-14 13:47:54,165 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 726 transitions, 12261 flow [2024-06-14 13:47:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:54,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:54,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:47:54,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:47:54,165 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:54,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1528951340, now seen corresponding path program 7 times [2024-06-14 13:47:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504629044] [2024-06-14 13:47:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:55,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504629044] [2024-06-14 13:47:55,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504629044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:55,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:55,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:55,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600257135] [2024-06-14 13:47:55,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:55,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:55,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:47:55,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 726 transitions, 12261 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:55,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:55,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:47:55,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:57,852 INFO L124 PetriNetUnfolderBase]: 5256/8343 cut-off events. [2024-06-14 13:47:57,852 INFO L125 PetriNetUnfolderBase]: For 2557525/2557528 co-relation queries the response was YES. [2024-06-14 13:47:57,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90082 conditions, 8343 events. 5256/8343 cut-off events. For 2557525/2557528 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53441 event pairs, 1116 based on Foata normal form. 18/8341 useless extension candidates. Maximal degree in co-relation 89848. Up to 6590 conditions per place. [2024-06-14 13:47:58,022 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 508 selfloop transitions, 242 changer transitions 0/755 dead transitions. [2024-06-14 13:47:58,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 755 transitions, 14949 flow [2024-06-14 13:47:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:47:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:47:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:47:58,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:47:58,023 INFO L175 Difference]: Start difference. First operand has 499 places, 726 transitions, 12261 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:47:58,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 755 transitions, 14949 flow [2024-06-14 13:48:06,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 755 transitions, 14811 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:48:06,450 INFO L231 Difference]: Finished difference. Result has 501 places, 729 transitions, 12770 flow [2024-06-14 13:48:06,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12123, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12770, PETRI_PLACES=501, PETRI_TRANSITIONS=729} [2024-06-14 13:48:06,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 457 predicate places. [2024-06-14 13:48:06,450 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 729 transitions, 12770 flow [2024-06-14 13:48:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:06,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:06,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:48:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:48:06,451 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:06,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash 887480467, now seen corresponding path program 1 times [2024-06-14 13:48:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:06,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172804270] [2024-06-14 13:48:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:07,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172804270] [2024-06-14 13:48:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172804270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:07,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:48:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784207284] [2024-06-14 13:48:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:48:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:07,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:48:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:48:07,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:48:07,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 729 transitions, 12770 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:07,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:07,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:48:07,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:10,526 INFO L124 PetriNetUnfolderBase]: 5241/8314 cut-off events. [2024-06-14 13:48:10,526 INFO L125 PetriNetUnfolderBase]: For 2405939/2405939 co-relation queries the response was YES. [2024-06-14 13:48:10,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90652 conditions, 8314 events. 5241/8314 cut-off events. For 2405939/2405939 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 53225 event pairs, 1106 based on Foata normal form. 1/8307 useless extension candidates. Maximal degree in co-relation 90416. Up to 7704 conditions per place. [2024-06-14 13:48:10,676 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 674 selfloop transitions, 66 changer transitions 0/745 dead transitions. [2024-06-14 13:48:10,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 745 transitions, 14320 flow [2024-06-14 13:48:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:48:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:48:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:48:10,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:48:10,677 INFO L175 Difference]: Start difference. First operand has 501 places, 729 transitions, 12770 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:48:10,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 745 transitions, 14320 flow [2024-06-14 13:48:19,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 745 transitions, 13954 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:48:19,381 INFO L231 Difference]: Finished difference. Result has 504 places, 729 transitions, 12546 flow [2024-06-14 13:48:19,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12404, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12546, PETRI_PLACES=504, PETRI_TRANSITIONS=729} [2024-06-14 13:48:19,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 460 predicate places. [2024-06-14 13:48:19,382 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 729 transitions, 12546 flow [2024-06-14 13:48:19,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:19,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:19,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:48:19,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:48:19,383 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:19,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash 842931859, now seen corresponding path program 2 times [2024-06-14 13:48:19,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:19,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244616158] [2024-06-14 13:48:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:19,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:20,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244616158] [2024-06-14 13:48:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244616158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:48:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051572059] [2024-06-14 13:48:20,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:48:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:48:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:48:20,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:48:20,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 729 transitions, 12546 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:20,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:20,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:48:20,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:23,488 INFO L124 PetriNetUnfolderBase]: 5238/8300 cut-off events. [2024-06-14 13:48:23,488 INFO L125 PetriNetUnfolderBase]: For 2416747/2416747 co-relation queries the response was YES. [2024-06-14 13:48:23,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90179 conditions, 8300 events. 5238/8300 cut-off events. For 2416747/2416747 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 53027 event pairs, 1104 based on Foata normal form. 1/8293 useless extension candidates. Maximal degree in co-relation 89941. Up to 7667 conditions per place. [2024-06-14 13:48:23,631 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 662 selfloop transitions, 80 changer transitions 0/747 dead transitions. [2024-06-14 13:48:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 747 transitions, 14112 flow [2024-06-14 13:48:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:48:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:48:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:48:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:48:23,632 INFO L175 Difference]: Start difference. First operand has 504 places, 729 transitions, 12546 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:48:23,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 747 transitions, 14112 flow [2024-06-14 13:48:31,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 747 transitions, 13938 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:48:31,640 INFO L231 Difference]: Finished difference. Result has 507 places, 729 transitions, 12550 flow [2024-06-14 13:48:31,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12372, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12550, PETRI_PLACES=507, PETRI_TRANSITIONS=729} [2024-06-14 13:48:31,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 463 predicate places. [2024-06-14 13:48:31,641 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 729 transitions, 12550 flow [2024-06-14 13:48:31,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:31,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:31,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:48:31,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:48:31,641 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:31,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 56625646, now seen corresponding path program 1 times [2024-06-14 13:48:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:31,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103577709] [2024-06-14 13:48:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:31,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:32,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:32,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103577709] [2024-06-14 13:48:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103577709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:32,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:48:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729331347] [2024-06-14 13:48:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:32,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:48:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:48:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:48:32,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:48:32,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 729 transitions, 12550 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:32,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:32,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:48:32,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:35,560 INFO L124 PetriNetUnfolderBase]: 5270/8348 cut-off events. [2024-06-14 13:48:35,560 INFO L125 PetriNetUnfolderBase]: For 2529626/2529626 co-relation queries the response was YES. [2024-06-14 13:48:35,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90914 conditions, 8348 events. 5270/8348 cut-off events. For 2529626/2529626 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 53409 event pairs, 1116 based on Foata normal form. 8/8344 useless extension candidates. Maximal degree in co-relation 90675. Up to 7725 conditions per place. [2024-06-14 13:48:35,697 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 688 selfloop transitions, 61 changer transitions 0/754 dead transitions. [2024-06-14 13:48:35,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 754 transitions, 14286 flow [2024-06-14 13:48:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:48:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:48:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:48:35,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 13:48:35,698 INFO L175 Difference]: Start difference. First operand has 507 places, 729 transitions, 12550 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:48:35,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 754 transitions, 14286 flow [2024-06-14 13:48:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 754 transitions, 14097 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:48:44,710 INFO L231 Difference]: Finished difference. Result has 508 places, 733 transitions, 12641 flow [2024-06-14 13:48:44,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12361, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12641, PETRI_PLACES=508, PETRI_TRANSITIONS=733} [2024-06-14 13:48:44,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-14 13:48:44,710 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 733 transitions, 12641 flow [2024-06-14 13:48:44,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:44,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:44,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:48:44,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:48:44,710 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:44,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1411571374, now seen corresponding path program 2 times [2024-06-14 13:48:44,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:44,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259622873] [2024-06-14 13:48:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:44,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:45,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259622873] [2024-06-14 13:48:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259622873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:45,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:48:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191728513] [2024-06-14 13:48:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:48:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:45,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:48:45,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:48:45,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:48:45,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 733 transitions, 12641 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:45,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:45,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:48:45,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:48,844 INFO L124 PetriNetUnfolderBase]: 5286/8390 cut-off events. [2024-06-14 13:48:48,845 INFO L125 PetriNetUnfolderBase]: For 2456066/2456066 co-relation queries the response was YES. [2024-06-14 13:48:48,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90968 conditions, 8390 events. 5286/8390 cut-off events. For 2456066/2456066 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 53875 event pairs, 1118 based on Foata normal form. 4/8383 useless extension candidates. Maximal degree in co-relation 90729. Up to 7697 conditions per place. [2024-06-14 13:48:48,982 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 688 selfloop transitions, 62 changer transitions 0/755 dead transitions. [2024-06-14 13:48:48,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 755 transitions, 14280 flow [2024-06-14 13:48:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:48:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:48:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:48:48,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:48:48,983 INFO L175 Difference]: Start difference. First operand has 508 places, 733 transitions, 12641 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:48:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 755 transitions, 14280 flow [2024-06-14 13:48:57,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 755 transitions, 14036 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-14 13:48:57,381 INFO L231 Difference]: Finished difference. Result has 508 places, 735 transitions, 12583 flow [2024-06-14 13:48:57,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12583, PETRI_PLACES=508, PETRI_TRANSITIONS=735} [2024-06-14 13:48:57,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-14 13:48:57,381 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 735 transitions, 12583 flow [2024-06-14 13:48:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:57,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:57,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:48:57,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:48:57,381 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:57,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1960735436, now seen corresponding path program 3 times [2024-06-14 13:48:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:57,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691452490] [2024-06-14 13:48:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691452490] [2024-06-14 13:48:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691452490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:58,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:58,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:48:58,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384903826] [2024-06-14 13:48:58,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:58,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:48:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:48:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:48:58,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:48:58,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 735 transitions, 12583 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:58,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:58,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:48:58,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:49:01,109 INFO L124 PetriNetUnfolderBase]: 5262/8347 cut-off events. [2024-06-14 13:49:01,110 INFO L125 PetriNetUnfolderBase]: For 2439365/2439368 co-relation queries the response was YES. [2024-06-14 13:49:01,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89953 conditions, 8347 events. 5262/8347 cut-off events. For 2439365/2439368 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 53545 event pairs, 1084 based on Foata normal form. 4/8340 useless extension candidates. Maximal degree in co-relation 89713. Up to 7560 conditions per place. [2024-06-14 13:49:01,383 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 642 selfloop transitions, 105 changer transitions 0/752 dead transitions. [2024-06-14 13:49:01,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 752 transitions, 14216 flow [2024-06-14 13:49:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:49:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:49:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:49:01,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:49:01,384 INFO L175 Difference]: Start difference. First operand has 508 places, 735 transitions, 12583 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:49:01,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 752 transitions, 14216 flow [2024-06-14 13:49:10,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 752 transitions, 14053 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:49:10,202 INFO L231 Difference]: Finished difference. Result has 509 places, 737 transitions, 12716 flow [2024-06-14 13:49:10,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12420, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12716, PETRI_PLACES=509, PETRI_TRANSITIONS=737} [2024-06-14 13:49:10,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 465 predicate places. [2024-06-14 13:49:10,203 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 737 transitions, 12716 flow [2024-06-14 13:49:10,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:10,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:49:10,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:49:10,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:49:10,203 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:49:10,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:49:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1976924876, now seen corresponding path program 4 times [2024-06-14 13:49:10,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:49:10,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886641080] [2024-06-14 13:49:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:49:10,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:49:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:49:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:49:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:49:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886641080] [2024-06-14 13:49:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886641080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:49:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:49:11,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:49:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881416949] [2024-06-14 13:49:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:49:11,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:49:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:49:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:49:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:49:11,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:49:11,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 737 transitions, 12716 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:11,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:49:11,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:49:11,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:49:14,217 INFO L124 PetriNetUnfolderBase]: 5337/8448 cut-off events. [2024-06-14 13:49:14,217 INFO L125 PetriNetUnfolderBase]: For 2568839/2568842 co-relation queries the response was YES. [2024-06-14 13:49:14,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92184 conditions, 8448 events. 5337/8448 cut-off events. For 2568839/2568842 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 54272 event pairs, 1084 based on Foata normal form. 8/8445 useless extension candidates. Maximal degree in co-relation 91943. Up to 7383 conditions per place. [2024-06-14 13:49:14,372 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 625 selfloop transitions, 139 changer transitions 0/769 dead transitions. [2024-06-14 13:49:14,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 769 transitions, 15057 flow [2024-06-14 13:49:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:49:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:49:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:49:14,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 13:49:14,373 INFO L175 Difference]: Start difference. First operand has 509 places, 737 transitions, 12716 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:49:14,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 769 transitions, 15057 flow [2024-06-14 13:49:23,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 769 transitions, 14694 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 13:49:23,441 INFO L231 Difference]: Finished difference. Result has 513 places, 750 transitions, 13110 flow [2024-06-14 13:49:23,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12411, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13110, PETRI_PLACES=513, PETRI_TRANSITIONS=750} [2024-06-14 13:49:23,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 469 predicate places. [2024-06-14 13:49:23,442 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 750 transitions, 13110 flow [2024-06-14 13:49:23,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:23,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:49:23,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:49:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:49:23,442 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:49:23,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:49:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1958438196, now seen corresponding path program 5 times [2024-06-14 13:49:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:49:23,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192212849] [2024-06-14 13:49:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:49:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:49:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:49:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:49:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:49:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192212849] [2024-06-14 13:49:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192212849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:49:24,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:49:24,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:49:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728028513] [2024-06-14 13:49:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:49:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:49:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:49:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:49:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:49:24,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:49:24,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 750 transitions, 13110 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:24,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:49:24,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:49:24,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:49:26,990 INFO L124 PetriNetUnfolderBase]: 5308/8394 cut-off events. [2024-06-14 13:49:26,990 INFO L125 PetriNetUnfolderBase]: For 2510883/2510886 co-relation queries the response was YES. [2024-06-14 13:49:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91217 conditions, 8394 events. 5308/8394 cut-off events. For 2510883/2510886 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 53805 event pairs, 1094 based on Foata normal form. 6/8389 useless extension candidates. Maximal degree in co-relation 90974. Up to 7536 conditions per place. [2024-06-14 13:49:27,135 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 636 selfloop transitions, 125 changer transitions 0/766 dead transitions. [2024-06-14 13:49:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 766 transitions, 14748 flow [2024-06-14 13:49:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:49:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:49:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:49:27,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:49:27,136 INFO L175 Difference]: Start difference. First operand has 513 places, 750 transitions, 13110 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:49:27,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 766 transitions, 14748 flow [2024-06-14 13:49:37,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 766 transitions, 14427 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-14 13:49:37,276 INFO L231 Difference]: Finished difference. Result has 516 places, 751 transitions, 13101 flow [2024-06-14 13:49:37,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12789, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13101, PETRI_PLACES=516, PETRI_TRANSITIONS=751} [2024-06-14 13:49:37,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 472 predicate places. [2024-06-14 13:49:37,277 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 751 transitions, 13101 flow [2024-06-14 13:49:37,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:37,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:49:37,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:49:37,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 13:49:37,277 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:49:37,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:49:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash -96945744, now seen corresponding path program 6 times [2024-06-14 13:49:37,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:49:37,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964096883] [2024-06-14 13:49:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:49:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:49:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:49:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:49:38,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:49:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964096883] [2024-06-14 13:49:38,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964096883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:49:38,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:49:38,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:49:38,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484521010] [2024-06-14 13:49:38,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:49:38,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:49:38,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:49:38,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:49:38,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:49:38,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:49:38,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 751 transitions, 13101 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:38,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:49:38,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:49:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:49:40,851 INFO L124 PetriNetUnfolderBase]: 5350/8474 cut-off events. [2024-06-14 13:49:40,851 INFO L125 PetriNetUnfolderBase]: For 2573907/2573910 co-relation queries the response was YES. [2024-06-14 13:49:40,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92742 conditions, 8474 events. 5350/8474 cut-off events. For 2573907/2573910 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 54488 event pairs, 1018 based on Foata normal form. 4/8467 useless extension candidates. Maximal degree in co-relation 92497. Up to 7151 conditions per place. [2024-06-14 13:49:41,002 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 611 selfloop transitions, 160 changer transitions 0/776 dead transitions. [2024-06-14 13:49:41,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 776 transitions, 15603 flow [2024-06-14 13:49:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:49:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:49:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:49:41,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:49:41,005 INFO L175 Difference]: Start difference. First operand has 516 places, 751 transitions, 13101 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:49:41,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 776 transitions, 15603 flow [2024-06-14 13:49:51,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 776 transitions, 15223 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 13:49:51,385 INFO L231 Difference]: Finished difference. Result has 518 places, 757 transitions, 13320 flow [2024-06-14 13:49:51,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12721, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13320, PETRI_PLACES=518, PETRI_TRANSITIONS=757} [2024-06-14 13:49:51,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 474 predicate places. [2024-06-14 13:49:51,385 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 757 transitions, 13320 flow [2024-06-14 13:49:51,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:51,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:49:51,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:49:51,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 13:49:51,386 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:49:51,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:49:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1542497100, now seen corresponding path program 7 times [2024-06-14 13:49:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:49:51,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354139643] [2024-06-14 13:49:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:49:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:49:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:49:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:49:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:49:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354139643] [2024-06-14 13:49:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354139643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:49:52,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:49:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:49:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523079008] [2024-06-14 13:49:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:49:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:49:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:49:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:49:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:49:52,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:49:52,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 757 transitions, 13320 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:49:52,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:49:52,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:49:52,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:49:55,185 INFO L124 PetriNetUnfolderBase]: 5366/8504 cut-off events. [2024-06-14 13:49:55,186 INFO L125 PetriNetUnfolderBase]: For 2599903/2599906 co-relation queries the response was YES. [2024-06-14 13:49:55,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93234 conditions, 8504 events. 5366/8504 cut-off events. For 2599903/2599906 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 54769 event pairs, 1094 based on Foata normal form. 4/8497 useless extension candidates. Maximal degree in co-relation 92989. Up to 7622 conditions per place. [2024-06-14 13:49:55,462 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 635 selfloop transitions, 134 changer transitions 0/774 dead transitions. [2024-06-14 13:49:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 774 transitions, 14992 flow [2024-06-14 13:49:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:49:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:49:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:49:55,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:49:55,463 INFO L175 Difference]: Start difference. First operand has 518 places, 757 transitions, 13320 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:49:55,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 774 transitions, 14992 flow